WO2001046089A1 - Granular silica fertilizers - Google Patents

Abstract

Granular silica fertilizers obtained by adding an organic polymer as a binder to a powdery material containing a silica material having a voidage of 50 to 90% followed by granulation, wherein the content of the binder is from 0.1% by weight to 3% by weight and the grain hardness is from 2 to 5 kg.

Description

 Description Granulated silicate fertilizer Technical field

 TECHNICAL FIELD The present invention relates to a siliceous fertilizer used as a fertilizer for cultivating soil of plants. Conventional technology

 Gramineous plants such as rice and wheat are known to absorb a large amount of silicate. In addition, it is known that keiic acid is important not only for growing grasses but also for growing sugarcane, corn, and strawberry. For example, in rice, it is said that dry matter of straw contains ca. 15% caicic acid, forming the skeleton of rice stems and leaves. Insufficient keic acid in grass plants causes a problem in that the amount of keic acid in epidermal cells is reduced, the stems are weakened, and lodging is liable to occur. For this reason, silicate fertilizers are widely used mainly in rice fields as rice fertilizers. In addition to rice, it is also used for wheat, sugarcane, corn and the like.

 Caic acid began to attract attention as a fertilizer component around 1960, and since that time, slag, a by-product of the steelmaking industry, has been used. At present, granulated slag and crushed lightweight aerated concrete are used as the silicate fertilizers.

 Mineral slag as a silicic acid fertilizer is quite popular because it is easy to apply mechanically because of its granulation. However, regarding its effect as a fertilizer, Japanese soil fertilizer science, 69 (6) P 5 7 6— 5 81 and Japanese soil fertilizer science, 69 (6) p. 61 2-6 17, as described in Lightweight cellular concrete that is a porous calcium silicate hydrate Is said to be better.

Japanese Patent Application Laid-Open No. Hei 6-29583 discloses a method of using lightweight cellular concrete, which is a porous calcium silicate hydrate, as a silicate fertilizer. Since 70% or more of the citric acid fertilizer disclosed in the publication is a crushed product having a particle size in the range of 0.85 to 8.0 mm, the container is compared with a granulated product. And clogging in pipes, etc. In addition to the problem that mechanical spraying is extremely difficult compared to granulated products, crushed products are likely to fall off during transportation even if the particle size is uniform at the time of shipment, and they will be noticeable when sowing. There was also a problem that it was difficult to handle because it was easy to handle and scratched the hands. In addition, if fertilized together with powder generated during transportation, there is a problem in that the air permeability of the root is poor and the root growth is adversely affected.

 As the granulated silicate fertilizer, a slag is known as described above, which is disclosed in Japanese Patent Application Laid-Open Nos. 2-178283 and 9-1208350. . Japanese Patent Application Laid-Open No. 2-1728283 discloses an example of granulating a siliceous fertilizer or the like using a binder gelatinized at about 100 ° C. after adding an alcohol to an aqueous starch. Is described. However, when granulation is carried out by the method described in the example of the publication using the porous kiosaceous material having a porosity of 50% or more used in the present invention, the binder is impregnated into the porous chiosic material. Since the effect of the binder is lost, the amount of the binder exceeding 4% by weight is required.

 Japanese Unexamined Patent Publication No. Hei 9-2008-350 discloses a fertilizer obtained by mixing crushed shells with at least 5% by weight of a siliceous fertilizer and granulating them. Although the publication states that lightweight foam concrete can be used as the silicate fertilizer, it is not described as an example. In the embodiment, granulation is performed using mineral silicate fertilizer with 5% by weight of sodium ligninsulfonate.

When growing a gramineous plant, if there is a shortage of caic acid at the seedling stage, the strength of the stalk is weak, and not only is the growth of the seedlings poor, but also there is a problem that it is difficult to plant the seedlings with a rice transplanter and it is difficult to plant them. Therefore, the fertilizing effect of the silicate fertilizer at the seedling raising stage is great, and a silicate fertilizer that can be fertilized at the seedling raising stage is desired. Since the silicate fertilizer is highly alkaline, it cannot be fertilized at the seedling raising stage. Methods for neutralizing and using this are disclosed in Japanese Patent Application Laid-Open Nos. 10-273666 and 11-13704. In Japanese Patent Application Laid-Open No. H10-27736666, a silicate material containing porous calcium silicate hydrate, such as lightweight cellular concrete, is treated with sulfuric acid and Z or phosphoric acid to neutralize it. It is used not only as a silicate fertilizer but also as a water retention material. Japanese Patent Application Laid-Open No. H11-137704 describes a method for raising rice seedlings in which a crushed product of porous calcium silicate hydrate whose pH is adjusted to 3.5 to 8.0 is fertilized. Has been disclosed. These methods are considered to be usable at the seedling raising stage because they are neutralized.However, when used for raising seedlings, the fertilizer is mixed with the cultivation soil in the seedlings, and the crushed silicate fertilizer is directly applied to the roots. As mentioned, there was a problem that not only the root growth was not enough, but also the ratio of power, rooting and seed exposure increased. In addition, the crushed shape has the same problem as described above.

Disclosure of the invention

 The present invention provides a granular kiosferous fertilizer which can be mechanically sprayed using a porous chiosic material, is easy to handle, and has an excellent effect as a fertilizer for plant cultivation soils such as grasses. The purpose is to provide. Another object of the present invention is to provide a coated granular silicic acid fertilizer which can be used as a fertilizer for raising seedlings of grasses. In addition, the present invention recycles a light-weight aerated concrete waste material, a used light-weight aerated concrete material such as a light-weight aerated concrete as a raw material for a low-temperature-containing fertilizer, and provides an inexpensive, low-temperature viable-acid fertilizer suitable for the environment. It is also intended to provide.

 The present inventors have conducted intensive studies and found that it is possible to granulate a powdery raw material composed of a porous, silicate-based raw material such as lightweight cellular concrete using a small amount of an organic polymer as a binder. The invention has been completed.

 That is, the present invention is as follows.

 (1) A fertilizer obtained by adding and granulating an organic polymer as a binder to a powdery raw material containing a kiogenic raw material having a porosity of 50 to 90%, and having a binder content of 0.1%. 1 weight. /. Not more than 3% by weight and having a grain hardness of 2 to 5 kg,

 (2) The granular silicate-based fertilizer according to (1), wherein the silicate-based raw material is a silicate-based material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis.

 (3) The silicate material is obtained by neutralizing a silicate material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis with an acid and adjusting the pH to 3.5 to 8.0. Yes Granular silicate fertilizer according to (1),

 (4) The granular kiosferous fertilizer according to (1), (2) or (3), wherein the powdery raw material is 100% by weight of a kiyacidic raw material.

(5) The powdery raw material is 40% by weight or more and 100% by weight of the silicate raw material. /. Less than Powdery raw material of (1), (2) or (3),

 (6) The powdery raw material includes a siliceous raw material and a cultivated soil, the granular siliceous fertilizer according to (5),

 (7) The powdery raw material containing granular kiosacidic fertilizer according to any one of (1) to (6), wherein the powdery raw material contains 70 to 100% by weight of particles passing through a sieve having an aperture of 250 μιη.

 (8) The granular silicate fertilizer according to any one of (1) to (7), wherein the organic polymer is an aqueous acryl emulsion resin or a styrene butadiene copolymer emulsion resin.

 (9) The granular silicic acid fertilizer according to any one of (1) to (8), wherein the sieve particle diameter of the granular silicic acid fertilizer is 1 to 2 Omm.

 (10) A coated granular silicate fertilizer obtained by coating the granular silicate fertilizer according to any one of (1) to (9) with a soil.

 (11) The powder raw material is impregnated with a liquid in an amount of 10 to 50% by weight of the powder raw material, and then an organic polymer solution or dispersion is added, followed by granulation by stirring. (1) The method for producing a granular silicate fertilizer according to any one of (1) to (9),

 (12) A method for cultivating a plant, comprising using the granular kiosferous fertilizer according to any one of (1) to (9) as a fertilizer for cultivating soil,

 (13) A method for cultivating rice, comprising using the granular chiosic fertilizer according to any one of (1) to (9) as a fertilizer for rice cultivation soil,

 (14) A method for cultivating rice, wherein the granular silicate fertilizer described in (3) is used as a soil fertilizer for cultivating rice seedlings,

 (15) A method for cultivating rice, comprising using the coated granular kiyferous fertilizer according to (11) as a bed soil for cultivating rice seedlings.

BEST MODE FOR CARRYING OUT THE INVENTION

The granular kiosferous fertilizer of the present invention refers to a granulated kaic acid obtained by adding an organic polymer as a binder to a powdery raw material containing a porosity of 50 to 90% and adding an organic polymer as a binder. It is a fertilizer with a porosity of 50-90. /. It is characterized in that it is obtained by granulating the above-mentioned porous, silicate-based raw material using a small amount of an organic polymer. The porosity in the present invention is a porosity determined by a mercury intrusion method. Using a sufficiently dried sample, the pore distribution is measured by the mercury intrusion method, and the pore volume per gram of the sample corresponding to the pore diameter from 0.06 βm to 100 μm Is the void volume F. On the other hand, the true density is measured, and the sample solid volume per 1 g of the sample is determined from the true density to obtain a solid content volume G, and the porosity is determined by the following equation (1).

 Porosity (%) = Void volume F ÷ (Void volume F + solids volume G) XI 00 The true density here is the true density determined by the mercury intrusion method, and the sample weight and the mercury pressure 207 PMa Is the density determined from the sample volume at.

 The porosity of the siliceous raw material referred to in the present invention is 50 to 90%, preferably 55 to 85%, and particularly preferably 60 to 80%. Since the silicate material supplies the silicate component as a fertilizer to the plant, water must be impregnated into the silicate material to elute the silicate. Therefore, it is desirable that the porosity is high so that water can be easily impregnated. However, if the porosity is too high, the content of the cayic acid as a fertilizer decreases, and the effect as a lubricating material decreases. From the balance between the two, a porosity in the above range is preferable, and a porosity of 60 to 80% is particularly preferable.

 In addition, the content of the soluble acid used in the present invention is preferably from 5 to 40% by weight, more preferably from 10 to 40% by weight, as measured by a sodium hydroxide dissolution method. , 20 to 40% by weight is particularly preferred. The higher the content of soluble caiic acid, the higher the effect as a caiic fertilizer, and the better it is. In light-weight cellular concrete, which is industrially used as a kaicic acid raw material, increasing the soluble kaicic acid content to more than 40% by weight requires autoclaving for a very long time. Due to production problems, the preferred content of the soluble keic acid is 5 to 40% by weight.

 The soluble keic acid content is measured by the hydrochloric acid Z sodium hydroxide dissolution method as follows.

(1) After pulverization, 1 g of a sample whose particle size has been adjusted to 0.1 to 0.5 mm with a sieve is put into 200 ml of a 0.5 N hydrochloric acid aqueous solution, and stirred for 8 hours. Filter through a μm membrane filter. (2) Determine the concentration of silicon in the obtained hydrochloric acid filtrate by ICP emission spectrometry. Assuming that the silicon is derived from caesic acid, determine the amount A of keiic acid in the hydrochloric acid filtrate in grams.

 (3) Remove the filtration residue that is not dissolved with 0.5 N hydrochloric acid, put it in 200 mL of 0.5 N aqueous sodium hydroxide solution, stir for 8 hours, and filter through a 1 m pore size membrane filter.

 (4) The concentration of silicon in the obtained sodium hydroxide filtrate was determined by ICP emission spectrometry, and assuming that the silicon was derived from keic acid, the amount B of keiric acid in the sodium hydroxide filtrate was measured in grams. Ask.

 (5) Determine the content of soluble keic acid by the following equation (2).

Soluble Keiic acid content (% by weight)-(Ciylic acid amount A + Keiic acid amount B) + 1 X 100

 (2) The powdery raw material used in the present invention may be a raw material of a silicate or a material obtained by adding a cultivation soil or other fertilizer components to the raw material of a silicate. The proportion of the caisic acid raw material in the powdered raw material is preferably 40 to 100% by weight, and the lower the ratio of the caiic acid raw material, the less the effect as a caesic acid fertilizer. More preferred. 100 weights of kay acid raw material. /. The granular kiosferous fertilizer is a granular type obtained by pulverizing a neatly obtained kiosaceous material containing porous calcium silicate crystals or neutralizing the same, and granulating it as a powder raw material. It is a silicic acid fertilizer, and is particularly preferable because of its high fertilizer effect.

 The organic polymer used as a binder in the present invention is preferably an organic polymer having a total content of carbon, oxygen and hydrogen elements of 70 to 100% by weight and having a weight molecular weight of 100 to 10000000. Say. If the weight molecular weight is less than 100, the effect of binding the siliceous raw material particles as a binder is small, and if the weight average molecular weight is more than 10000000, the viscosity is too high, and the viscosity is too high. Difficult to spray in grains.

Examples of the organic polymer include gelatin, molasses, polyvinyl alcohol, lignin, carboxymethyl cellulose, aqueous acrylic emulsion resin, styrene butadiene copolymerized emulsion resin, and among others, polyvinyl alcohol, lignin, carboxymethyl cellulose, and aqueous acrylic resin. System emalge Yong resin and styrene-butadiene copolymer emulsion resin are preferred, and aqueous acryl-based emulsion resin and styrene butadiene copolymer emulsion resin are more preferred.

 When an aqueous acryl-based emulsion resin and a styrene-butadiene copolymer-based emulsion resin are used as the organic polymer as a binder, there is no hygroscopic property, and the particle hardness does not decrease over time during the storage period, and stable physical properties are obtained. Can be provided for a long period of time. It is preferable that the granular silicic acid fertilizer maintain its shape for several days after fertilization in order to secure the air permeability of the root. Granular silicate fertilizer granulated using aqueous acrylic emulsion resin and styrene-butadiene copolymer emulsion resin can be sprayed in liquid form because it becomes emulsion when sprayed as a binder. When used as fertilizer, it is hardly soluble in water and has appropriate underwater shape retention properties. The underwater shape retention of the fertilizer has little effect when used in rice paddy fields, for example, and the granular shape may be quickly collapsed and powdered by water to enhance the fertilizer effect. However, when used for rice seedlings or other seedlings, the seeds may germinate and grow for several days after the seeds germinate. . Therefore, if it does not have an appropriate shape retention in water and the grains become powdered immediately after fertilization and the fertilizer components elute, the growth of the seedlings will be inhibited rather. This shape retention in water varies depending on the type of plant, but is usually preferably about 5 to 20 days, and particularly preferably 7 to 14 days.- As a binder, an aqueous acryl-based emulsion resin and styrene-butadiene copolymer are used. In the case of the granular silicic acid fertilizer granulated using the emulsion resin, the shape retention in water can be adjusted within the above range.

 By the way, when gelatin, molasses, etc. are used, the water solubility is high, and it is difficult to maintain the shape for several days after fertilization. Gelatin, molasses, and polyvinyl alcohol are hygroscopic, and when used as granular fertilizer, the grain hardness decreases over time during the storage period. Hygroscopicity is slightly reduced when lignin or carboxymethylcellulose is used as the organic polymer.

The proportion of the organic polymer to be added is such that the content of the organic polymer as solid content is 0.1 to 3% by weight based on the dry granular kiwiferous fertilizer, and preferably 0.3. ~ 2 weight. /. More preferably 0.5 to 2% by weight, particularly preferably 0.8 to 1.5% by weight. /. It is. The lower the organic polymer content, the less the organic polymer remains in the cultivated soil and the better the environment. However, if the content is less than 0.1% by weight, the grain hardness becomes small, resulting in chipping and powder falling during transportation. It is more likely to occur and it is difficult to do with mechanical spraying. On the other hand, if the content of the organic polymer exceeds 3% by weight, the grain hardness becomes unnecessarily high, and the proportion of the organic polymer which is not easily decomposed in nature increases, which is not environmentally preferable. It may be determined appropriately within the above range depending on the required shape maintaining properties during fertilization and applications such as raising seedlings.

 The grain hardness referred to in the present invention is a grain hardness measured by a Kiya hardness meter (manufactured by Fujiwara Seisakusho Co., Ltd., Utility Model Registration No. 1 748 88), and is an average value obtained by measuring any 20 grains. Is expressed in kg. In the present invention, the grain hardness needs to be 2 to 5 kg, and preferably 2 to 4 kg. If the grain hardness is less than 2 kg, there is a risk of collapse during transportation and chipping during handling. Further, it is not necessary to make the particle size larger than 5 kg, and if the amount of binder is increased to make the particle hardness larger than necessary, the above-mentioned adverse effects are rather increased.

 In the present invention, as a raw material of a silicate having a porosity of 50 to 90%, a silicate material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis is used. The citric acid material contains a calcium silicate hydrate crystal obtained by hydrothermally synthesizing a mixture of water and silica with a calcium oxide component such as calcium oxide, calcium hydroxide, and Portland cement. It is an acid material. The term "hydrothermal synthesis" as used herein means autoclave steam curing, and means curing in an atmosphere at a steam temperature of 140 to 230 ° C for at least 1 to 30 hours. Examples of the silicate material containing hydrated calcium silicate obtained by hydrothermal synthesis include those containing hydrated calcium silicate such as tobermorite, zonolite, gyrolite, and hillebrand light. Can be In the present invention, the phrase "containing calcium silicate hydrate crystals obtained by hydrothermal synthesis" corresponds to any of tobermorite, zonolite, gyrolite, and hilleblanite in powder X-ray diffraction analysis. 4. The main peak of the crystal can be confirmed.

The main peaks of calcium silicate hydrate crystals in powder X-ray diffraction analysis were as follows: Tobermorite appears at about 11 A, zono light at about 3.7 A, gyro light at about 22 A, and Hillebrand light at about 4.7 A.

 An example of the caiodic material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis is lightweight cellular concrete specified in JIS A5416. The lightweight cellular concrete contains a large amount of a soluble silica component and has a high porosity, so that water easily penetrates and elutes the keic acid, so that it has a high effect as a keic acid fertilizer, and is particularly preferably used in the present invention.

 Further, in the present invention, as a raw material having a porosity of 50 to 90%, a carbonaceous material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis is neutralized with an acid to adjust pH. A caiodic material adjusted to 3.5 to 8.0 can also be used. Ca-acid material neutralized with an acid and adjusted to pH 3.5 to 8.0 is an alkaline ca-acid material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis. Neutralized, acidified to weakly alkaline silicate material, preferably adjusted to pH 4.0-6.5, more preferably adjusted to pH 4.5-5.5. ,.

 In the present invention, the pH means 10 parts by weight of a silicate material, a granular silicate fertilizer, or a coated granular silicate fertilizer, is immersed in 50 parts by weight of distilled water, and stirred to such an extent that the shape is not broken. After the measurement, refers to the pH of the liquid phase measured at 20 ° C.

 Acids that neutralize the silicate material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis include hydrochloric acid, nitric acid, sulfuric acid, and phosphoric acid, among which sulfuric acid and phosphoric acid are preferable, and sulfuric acid is preferable. Particularly preferred. The alkaline component of the calcium hydrate hydrate crystals contained in the non-neutralized calcium acid material is calcium, so when neutralized with an acid such as hydrochloric acid or nitric acid, a soluble salt is formed. This will increase the concentration. Neutralizing the silicate with sulfuric acid or phosphoric acid produces water-insoluble calcium sulfate or calcium phosphate, so there is little problem with increasing the concentration of water-soluble salts. Neutralization with sulfuric acid is particularly preferred because it may cause phosphorus damage.

The amount of acid that neutralizes the silicate can be adjusted to a pH of 3.5-8.0, preferably pH 4.0-6.5, and more preferably pH 4.5-5.5. Any amount that can be adjusted is acceptable. For example, if the silicate material is lightweight cellular concrete, dry lightweight cellular An appropriate amount of sulfuric acid corresponding to 120 to 80 parts by weight of 12N sulfuric acid is 100 parts by weight of concrete.

 When used for cultivation of rice seedlings, the pH of the granular silicic acid fertilizer is preferably 3.5 to 8.0, more preferably pH 4.0 to 6.5, and pH 4.5 to 5.5. More preferably, to obtain such a granular kiosferous fertilizer having a pH, granulation may be carried out using a corresponding silicic acid material having a pH. In the rice seedling test, the growth of rice seedlings was particularly good near pH 5, and the growth tended to be poor as the pH was further away from 5.

 The pH of a granular kiosferous fertilizer made from a chiosiic material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis, which is not neutralized with an acid, is from 10 to 11; Fertilizers having such a pH can be used for paddy fields and other plant fields. If a granular kiosferous fertilizer with a pH adjusted to 3.5 to 8.0 is used for the cultivation soil of rice seedlings, the growth of the rice seedlings in the rice seedlings is good, and the effect of the chiosic fertilizer is effective. When a granular silicic acid fertilizer having a pH of 10 to 11 is used for rice seedlings, rice cultivation becomes very likely to occur on the roots, making rice seedlings difficult.

 In the present invention, cultivated soil, fertilizers other than citrate, soil for cultivation, mulch, fungicides, and the like can be used as a mixture for the powdery raw material. be able to. Above all, granulated silicate fertilizer mixed with cultivated soil has the effect that it can be used alone as floor soil without using cultivated soil in rice seedlings. When used for raising rice seedlings, use a kiosaceous material whose pH has been adjusted by neutralizing a chiosic raw material obtained by hydrothermal synthesis with an acid. The cultivated soil referred to in the present invention refers to soil for cultivating plants, and includes commercially available cultivated paddy rice seedling cultivation, mountain soil, paddy soil and the like. When cultivating mountain soils or paddy soils, soil disinfection as appropriate is preferred. The particle size of the cultivated soil of the present invention is not particularly limited as long as granulation can be performed, and is not particularly limited, but it is preferable to adjust the particle size to a fine particle size such that it passes through a sieve having an aperture of 250 μm. ,.

The proportion of the cultivated soil of the granular silicic acid fertilizer mixed with the cultivated soil of the present invention is preferably not more than 60% by weight based on the powdered raw material. When used, 30 to 55% by weight is more preferred, and 40 to 50% by weight is most preferred. The more cultivation soil is added, the more fertilizer is used It is preferable that the cultivation soil is 60% by weight or less, because the effect of supplying the soil to the gramineous plants is reduced. When a granular silicic acid fertilizer containing 40 to 50% by weight of cultivated soil is used alone as it is in the soil for rice seedling test, rice seedlings grow well. Next, 30% by weight and 55% by weight. /. The growth when including was good.

 The particle size of the powder raw material used in the present invention may be any size as long as granulation can be performed, and varies depending on the type and size of the granulating device used. In general, the finer the finer, the easier it is to granulate, but when the fertilized granulated fertilizer collapses over time, if it is too fine, the air permeability deteriorates, and there is a risk of inhibiting root growth. Since there is a fine powder material passing through a sieve with openings of 250 μm, the raw material has a weight of 70 to 1.00 weight. /. Preferably, it comprises 80-100 weight. /. More preferably, the content is more preferably 100% by weight. If a large amount of large sieve material particles that do not pass through a sieve with an aperture of 250 / m are included, not only will it be difficult to form granules during granulation, but also the grain hardness of the granular siliceous fertilizer will be greatly reduced. It is preferable that 70% by weight or more of fine particles pass through a sieve having an aperture of 250 / m as a powder raw material.

 Further, the coated granular kiosferous fertilizer obtained by coating the above granular kiosaceous fertilizer with cultivation soil is a chiosic fertilizer particularly excellent in root growth. The coated granular silicate fertilizer coated with the cultivated soil of the present invention also has an effect that it can be used alone as a bed soil without using cultivated soil or the like in rice seedlings. In particular, a coated granular kiosferous fertilizer using a chiosic acid material whose pH has been adjusted by neutralizing the chiosic acid raw material obtained by hydrothermal synthesis as a kiyasitic raw material is used as a bed soil for rice seedlings. preferable.

 The proportion of the cultivation soil used for coating the coated granular kiyferous fertilizer of the present invention is preferably 30 to 60% by weight, more preferably 40 to 50% by weight, based on the coated granular kiylic fertilizer. ,. The more the amount of soil to be covered, the less the effect of supplying the caffeic acid to the grasses as fertilizer. Therefore, the soil is preferably 60% by weight or less. In addition, when the granular silicate fertilizer containing 40 to 50% by weight of the cultivated soil was used alone as the soil for the rice seedling test, the growth of the rice seedling was good.

As a binder to be used when the cultivated soil is coated on the granular kiosferous fertilizer, the above-mentioned organic polymer used for the production of the granular chiosic fertilizer can be used as a binder for the same reason. For example, gelatin, molasses, polyvinyl alcohol Examples include olein, lignin, carboxymethylcellulose, aqueous acrylic emulsion resin, styrene butadiene copolymer emulsion resin, and the like. Polyvinyl alcohol, lignin, carboxymethyl cellulose, aqueous acrylic emulsion resin, styrene butadiene copolymer emulsion resin are preferable. And more preferably an aqueous acrylic emulsion resin and a styrene-butadiene copolymer emulsion resin. The proportion of the organic polymer to be added is preferably 0.1 to 3% by weight based on the weight of the dry coated granular kiyote, for the same reason as for the granular kiyote. Is from 0.3 to 2% by weight, more preferably from 0.5 to 2% by weight, particularly preferably from 0.8 to 1.5% by weight.

 The method for producing the granular silicate fertilizer of the present invention will be described below.

 In the present invention, the term "granulation" refers to a method in which a powder raw material is diluted with a solvent by using a granulator such as a bread granulator, an extrusion granulator, a stirring granulator, or a backflow strong mixer. Granulation performed while spraying a solution or slurry. As in the present invention, in order to obtain a granular silicic acid fertilizer having a particle hardness of 2 to 5 kg with a small amount of binder, it is preferable to use a strong countercurrent mixer among the above granulators.

Since the powdery raw material used in the present invention contains a porous siliceous raw material, the binder may enter the porous material during granulation, and the consumption of the binder may increase. In order to avoid this, in the present invention, a solution obtained by spraying a solvent such as water at the time of granulation to fill the voids of the powder raw material with a liquid such as water, and then diluting the organic polymer as a binder with the solvent. Alternatively, it is necessary to perform granulation by atomizing the slurry. In order to fill the voids of the powder raw material with a liquid such as water before adding the binder, the powder raw material may be slowly sprayed with a liquid such as water while stirring the powder raw material with a stirrer. Also, the amount of liquid when filling the voids of the powder raw material with a liquid such as water depends on the porosity of the powder raw material. The amount of such a liquid is preferably from 10 to 50% by weight, particularly preferably from 2 ° to 40% by weight. If the amount of this liquid is small, a large amount of binder is required to obtain hardness. If the amount of the liquid is large, since the granulation yield decreases, 1 0-5 0 weight ⁰ /. Is preferred, _c

A solution or slurry prepared by diluting an organic polymer as a binder with a solvent The concentration of the organic polymer solution or slurry at the time of granulation is 0.5 to 70% by weight as the solid concentration of the organic polymer. /. It is preferably from 5 to 50% by weight, particularly preferably from 10 to 30% by weight. The solution or concentration of the organic polymer slurry is sufficient as long as it can be sprayed. However, if the concentration of the organic polymer exceeds 70% by weight, a sprayer capable of spraying must be special, so it is not versatile. The concentration of the organic polymer solution or slurry is 0.5% by weight. /. Below, very much slurry must be sprayed, which is inefficient.

 In addition, this granulation is preferably performed at room temperature.However, in a granulating apparatus that performs both drying and granulation by raising the temperature while performing granulation, the temperature is preferably in the range of 0 to 100 ° C. It is preferable to perform granulation. If the granulation temperature exceeds 10 ° C, the organic polymer as a binder may be decomposed and hinder plants.

 The granular silicic acid fertilizer mixed with the cultivated soil can be produced in the same manner as the granular silicated fertilizer, using the silicic acid raw material, the cultivated soil and the material uniformly stirred with a mixer as the powdery raw material.

 In addition, the coated granular kiwiferous fertilizer is prepared by putting the granular kiwiferous fertilizer into a stirring granulator, and first, while stirring the granular kiwiferous fertilizer, a solution in which an organic polymer as a binder is diluted with a solvent on the surface thereof. The slurry is sprayed in an amount of about 2 to 10 parts by weight with respect to 100 parts by weight of the granular kiyacidic fertilizer to wet the entire surface, and then the clay powder is put into a granulator, and the binder is agitated while stirring. Granulation is performed by additionally spraying an organic polymer solution or slurry.

Since the granular kiosferous fertilizer and the coated granular kiosferous fertilizer of the present invention are intended for use in plant cultivation, it is preferable that they have a size that easily fits into the roots of plants and is easily sprayed. Therefore, the sieve particle size is preferably 1 to 20 mm, more preferably 1 to 10 mm, and particularly preferably 1 to 6 mm. If the sieve diameter is larger than 20 mm, the particle size is too large for normal mechanical spraying and it may be clogged in the spreader, which is not appropriate. If the sieve particle size is greater than 10 mm and less than 20 mm, mechanical spraying is possible, but if the size of the sieve is not so large, it is difficult to adjust to the roots due to its large particle size, so the range of application is limited to large plants. A sieve particle size of 1 to 10 mm is suitable for use in rice paddies and rice seedlings, which are in high demand, but especially with a sieve particle size of 1 to 6 mm. It is an effective fertilizer particle size because it is excellent in growing rice seedlings and can be used in rice paddy fields.

 The method of using the granular kiosferous fertilizer or the coated granular kiosferous fertilizer of the present invention includes the following: (1) spraying the granular kiosferous fertilizer of the present invention or the coated granular kiosferous fertilizer on a cultivation soil of a plant including a Poaceae family. how to,

 (2) a method of laying the granular silicate fertilizer or the coated granular silicate fertilizer of the present invention on a nursery of a plant including a gramineous family, and planting the nursery with the nursery after cultivation;

 (3) a method of locally laying the granular kiosseous fertilizer or the coated granular kiosseous fertilizer of the present invention in one or several places of paddy fields;

And the like.

When spraying the granular kiosferous fertilizer (1) or the coated granular kiosferous fertilizer (hereinafter referred to as (coated) granular kiosferous fertilizer) on the cultivation soil of a large area of plants including grasses, Since the soil ρ Η is not so affected by the acid fertilizer （（, (covered) granular silicate fertilizer can be used in a wide range of ρΗ3 ~ 11. However, when spraying with ammonia-based nitrogen fertilizers such as urea at the same time, granular alkaline acid fertilizer with ρ Η 8 or less should be used, because if alkaline is strong, ammonia will evaporate and lose the effect of nitrogen fertilizer. Is preferred. (Coating) fertilization amount of particulate Kei acid fertilizers, cultivation soil 1 000 _m ² per the present invention (coating) is preferably a particulate Kei acid fertilizer child 1 0 to 1 000 kg fertilizer to, 50 to 3 00 kg Especially preferred to fertilize. When the fertilizer application amount of the (covered) granular silicate fertilizer of the present invention is less than 10 kg per 1 000 m ^{2 of} cultivated soil, the effect of the silicate fertilizer is small. In addition, when the fertilizer application amount of the (coated) granular silicate fertilizer of the present invention is more than 1 000 kg per 1 000 m ^{2 of} the cultivated soil, fertilizer is applied more than necessary, which is not preferable.

When laying the (coated) granular silicate fertilizer of the present invention of (2) on a nursery of a plant including a gramineous family, the (coated) granular silicate fertilizer having a pH of 3.5 to 8.0 is preferable. A (coated) granular kiwiferous fertilizer having a pH of 4.0 to 6.5 is more preferable, and a (coated) granular kiwiferous fertilizer having a pH of 4.5 to 5.5 is more preferable. In the rice seedling test, the (coated) granular silicic acid fertilizer having a pH of around 5 showed particularly good growth of rice seedlings, and the growth tended to decrease as the pH was further away from 5. In addition, including Gramineae When laying in a plant nursery, a granular kiosferous fertilizer may be used, but a granular kiosferous fertilizer mixed with cultivated soil is more preferable, and a coated granular silicate fertilizer coated with cultivated soil is more preferable = The growth of rice seedlings is better with granular clay-mixed fertilizer mixed with cultivated soil than with granulated clay-based fertilizer, and coated granular silicate-based fertilizer coated with cultivated soil is better than mixed granular silicate-based fertilizer mixed with cultivated soil. But the growth of rice seedlings is good. The reason is presumed that the contact of the soil with the roots is better for the growth of seedlings.

 Nitrogen, phosphoric acid, and potassium fertilizer are added to a mixture of the granular silicic acid fertilizer of the present invention and the cultivation soil at an appropriate ratio, and if necessary, a pathogen or a pest control agent and the like are added to form a nursery. There is a method of sowing seed germ paddy on the top and covering it with cultivation soil. The mixing ratio when the granular silicic acid fertilizer of the present invention is mixed with the cultivation soil is not particularly limited, but 100 to 100 parts by weight of the cultivation soil is 10 to 100% by weight of the granular silicate fertilizer of the present invention. Parts are preferred. If the amount of the fertilizer is less than 10 parts by weight, the effect of the silicate fertilizer is small: If the amount of the fertilizer is more than 10 parts by weight, root growth may not be good.

In the case of locally laying the (coated) granular kiosferous fertilizer of the present invention of (3) in one or several places of paddy fields, for example, the (coated) granular fertilizer of the present invention near a water intake of a paddy field is used. It is preferable to lay a silicic acid fertilizer. Amount, paddy 1 0 0 0 m ² per (coating) 1 0~ 1 0 0 0 kg fertilization to Rukoto preferably granular Kei acid fertilizer laying the (coated) granulate Kei acid fertilizer, 5 0 3 0 0 kg fertilization is particularly preferable to Les, (coated) fertilization amount of particle-like Kei acid fertilizer is, if less than paddy 1 0 0 0 m ² per 1 0 kg is the Kei acid fertilizer Less effective. Further, fertilization of (coated) granulate Kei acid fertilizer is, when paddy 1 0 0 O m ² per 1 0 0 0 more than kg becomes to fertilization much fertilizer than necessary, not very suitable .

 Hereinafter, the granular siliceous fertilizer of the present invention and the method for producing the same will be described with reference to examples. The measuring methods used in the examples and comparative examples are as follows.

 (1) Porosity measurement

It is a porosity determined by a mercury intrusion method. To determine the porosity by the mercury intrusion method, a sufficiently dried sample is measured for the pore distribution by the mercury intrusion method, and the pore diameter is reduced from 0.06 μm to 100 μm. The void volume per 1 g of the corresponding sample is defined as the void volume F. Also, the true density is measured simultaneously with the pore distribution by the mercury intrusion method, From the true density, calculate the sample solid content volume per 1 g of the sample, define it as the solid content volume G, and determine the porosity by the following formula (1).

Porosity (%) = Void volume F ÷ (Void volume F + Solid content volume G) XI 00 (1) The true density here is the true density determined by the mercury intrusion method, and the sample weight and the sample at a mercury pressure of 207 MPa. This is the density determined from the volume.

 (2) Measurement of grain hardness of fertilizer

 This is the average value of the hardness measured using a Kiya hardness meter (Fujiwara Seisakusho Co., Ltd., Utility Model Registration No. 1 744886) measured in arbitrary 20 grains in kilograms.

 (3) pH measurement of fertilizers and raw materials

 10 parts by weight of fertilizers and raw materials, etc. are immersed in 50 parts by weight of distilled water and stirred to the extent that the shape is not broken. After 3 days, the pH of the liquid phase is measured at 20 ° C.

 (4) Tobermorite crystal measurement

 X-ray diffraction analysis of the crushed sample powder was performed using a Rigaku Denki RU-200 B-type X-ray diffraction analyzer, and peaks were clearly found at a position of about 11 A corresponding to tobermorite crystals. The appearance was evaluated.

 (5) Measurement of soluble caiic acid content

 According to the following procedure, it means the value determined by the sodium chloride hydrochloride dissolution method.

 ) After crushing, place 1 g of the sample whose particle size has been adjusted to 0.1 to 0.5 mm with a sieve into 200 ml of 0.5 N hydrochloric acid aqueous solution at 20 ° C, stir for 8 hours, and then filter with a 1 m pore size membrane filter. And filtered.

 (b) Determine the concentration of silicon in the hydrochloric acid filtrate by ICP emission spectrometry. Assuming that the silicon is derived from keic acid, determine the amount A of keiric acid in the hydrochloric acid filtrate in grams.

 (c) Take the filtration residue that is not dissolved with 0.5 N hydrochloric acid, put it into 200 mL of 0.5 N aqueous sodium hydroxide solution, stir for 8 hours, and filter through a membrane filter with a pore size of 1 m.

 (d) The concentration of silicon in the sodium hydroxide filtrate is determined by ICP emission spectrometry, and assuming that the silicon is derived from citric acid, the amount B of keiric acid in the sodium hydroxide filtrate is determined in grams.

(e) Determine the content of soluble keic acid by the following equation (2). Soluble Keiic acid content (weight./.) = (Keiic acid amount A + Keiic acid amount B) + 1 X 100

 (2)

(6) Dry matter weight measurement above rice

 The weight obtained by cutting the upper part (stem, leaf, and paddy part) from rice soil, and drying the cut ground part sufficiently in an oven at 80 ° C until the weight becomes constant.

 (7) Determination of the content of keic acid in dry matter above rice

 Cut the upper part (stem, leaf, paddy part) from the rice soil, dry the cut part in a dryer at 80 ° C until the weight becomes constant, and take 1 kg to 1 mm or less. Crush and mix evenly. Take 1 g of the milled rice dry matter, add 10 g of anhydrous sodium carbonate, mix and transfer to a platinum crucible, heat and dissolve in alkali. After cooling, the solid mass in the platinum crucible is dissolved with hot distilled water. Further, sodium hydroxide and distilled water are added to the solution dissolved in hot distilled water to obtain a 200 ml solution D of sodium hydroxide 0.5N.

The concentration of silicon (Si) in this solution D is quantified by ICP emission spectrometry. Assuming that all the silicon (S i) in the solution D is derived from the kaic acid (S i 〇 ₂ ), determine the weight D of the keic acid in the solution D. Since the weight D of the caic acid is the weight of the caic acid in 1 g of dry matter of rice, the content of the caic acid in the aerial part of the rice is calculated from the weight D of the caic acid in terms of% by weight.

 (8) Measuring dry matter weight above the seedling

 The rice seedlings (stems and leaves) that were exposed above the cultivation cover were cut off, and the cut 1,000 rice seedlings were thoroughly dried in an oven at 80 ° C until constant weight, and then dried. Measure the weight of 1,000 seedlings above the rice seedlings.

 (9) Measuring the content of Keiic acid in the seedling

Cut off the rice seedlings (stems and leaves) that have come out from the cultivation cover soil. Dry the cut rice seedlings thoroughly in an oven at 80 ° C until constant weight is obtained. Pulverize and mix evenly so that it is less than mm. Take 1 g of the milled and dried rice, add 10 g of anhydrous sodium carbonate, mix and transfer to a platinum crucible, heat and alkali-melt. After cooling, the solid mass in the platinum crucible is dissolved with hot distilled water. Further, sodium hydroxide and distilled water are added to the solution dissolved in hot distilled water to obtain a 200 ml solution D of sodium hydroxide 0.5N. The concentration of silicon (Si) in this solution D is quantified by ICP emission spectrometry. Assuming that all the silicon (S i) in the solution D is derived from the kaic acid (S i 0 ₂ ), the weight D of the keic acid in the solution D is determined. Since the weight D of the caic acid is the weight of the caic acid in 1 g of dry matter of rice, the content of the caic acid in the aerial part of the rice is calculated from the weight D of the caic acid in terms of% by weight.

 (10) Measurement of dry matter weight of underground part (root) of seedling

 The root portion of the lower rice seedlings was cut from the cultivation cover soil, and 100,000 underground portions of the cut rice seedlings were sufficiently dried in an oven at 80 ° C until the weight became constant, and then the lower portion of the dried rice seedlings 1 000 Measure the weight of the book.

 (1 1) Measurement of shape retention in water

Put 100 grains of fertilizer and 200 g of water in a 500 milliliter container, and leave it in a 20 ^C C constant temperature room. This was gently pulled up at the same time every day, and the standing time in which the number of disintegrated grains exceeded 50 was indicated in days.

Example 1

 53 parts by weight of silica stone, 7.5 parts by weight of quicklime, 37 parts by weight of ordinary Portland cement, 2.5 parts by weight of dry gypsum, 100 parts by weight of these solids, 70 parts by weight of water, and 0.060 parts by weight of aluminum powder Was mixed into a slurry and poured into a mold. The slurry poured into the formwork is placed in a constant temperature room at 40 ° C, the curing time is adjusted, and a semi-cured cellular concrete material with a compressive strength of 0.1 MPa measured according to JIS A5416 is used. Obtained.

 For this semi-hardened cellular concrete material, raise the temperature from room temperature to 180 ° C for 2 hours.

Autoclave water steam curing was performed at a constant temperature of 180 ° C for 5 hours and a temperature decrease from 180 ° C to room temperature for 3 hours to obtain a lightweight cellular concrete plate.

This lightweight aerated concrete board is a silicate-based material containing calcium silicate hydrate crystals obtained by the hydrothermal synthesis referred to in the present invention. This lightweight aerated concrete plate was crushed and dried at 70 ° C. for 3 days until the weight became constant, and passed through a sieve having an opening of 250; zm to obtain a lightweight aerated concrete powder having a sieve diameter of 250 μπι or less. This lightweight aerated concrete powder was used as a raw material for the formation of a silicate. The porosity measurement, tobermorite crystal measurement, and the content of the soluble kaic acid of this kaic acid raw material were measured. The results are shown in Table 1. Granulation is performed using the water-based acrylic emulsion resin as a binder, using a mixer (Eilitz mixer R-02 type, manufactured by Nippon Airitz Co., Ltd.) as a powdery raw material. Goods made. As an aqueous acrylic emulsion resin, Polytron U154 (a resin solid content of 60% by weight) manufactured by Asahi Kasei Corporation was used. The granulation is carried out by rotating 1500 g of the powdered raw material with the mixer, first atomizing only water with a small amount of 37.5 g, and then mixing the aqueous acryle margillon resin with the resin solid content of 1 g. 2 weight. Granulation was carried out while spraying 152 _{g of} an aqueous acryl emulsion resin slurry solution which had been diluted with water so as to become thin. After granulation, the granulated product was dried in a dryer at 60 ° C. for 3 days until a constant weight was obtained, to obtain a granular silicic acid fertilizer. The granular silicate fertilizer was sieved using a sieve with a mesh size of 1 mm and 1 Omm to obtain a granular silicate fertilizer having a sieve diameter of 1 to 1 Omm. The content of the water-soluble polymer in the granular silicic acid fertilizer was determined from the spray addition amount of the aqueous acrylemulsion resin slurry during granulation. The results are shown in Table 2.

 In addition, the granular hardness measurement, the pH measurement, and the measurement of the soluble kiic acid content of the granular kiosferous fertilizer were performed. Table 2 also shows the results.

 A transport test of this granular silicate fertilizer was performed. Packed 20 kg of granular ca-acidic fertilizer, piled 10 bags on the truck bed, transported the truck from Fujisaki, Shizuoka Prefecture to Sendai City, Miyagi Prefecture, and checked for chipping and powder loss in truck transport. The investigated trucks were transported and their weight as chipping rate passing through a sieve diameter of 1 mm. /. As a result of measurement, the chipping rate was 0% by weight, and there was no chipping or powder dropping by truck transportation.

The granular Kei acid fertilizer in 2 0 O m ² of test paddies 4 0 kg evenly and sprayed with Iseki Co. riding rice transplanter PA 5 3 D, and the mechanical spraying test. In this mechanical spraying test, it was found that there was no clogging etc. due to the granular silicate fertilizer, and there was no problem with mechanical spraying. In addition, the granular silicate fertilizer was handled with bare hands, but the hands were not hurt and the powder did not get into the eyes.Therefore, the crushed lightweight aerated concrete of Comparative Example 7 shown below was handled. It turned out to be easy.

Next, 40 kg of the granular silicate fertilizer was evenly spread on a test paddy field of ²⁰ O m ² , and a rice paddy growing test was performed. The soil in the test paddy is non-arofenic black soil. Koshihikari seedlings grown in this paddy field were transplanted in mid-May with a planting density of 18 strains Zm ² . Fertilizer than Kei siliceous has a total volume of basal fertilizer, coated urea-containing granular compound fertilizer so that 7 g Zm ² with nitrogen component (N: P ₂ 〇 _5: K ₂ 〇 = 1 6: 1 6: 1 6, Of these, coated urine (N = 70%) was applied by the lateral strip.

The seedlings grown in paddy fields, perform harvesting in mid September, dry weight of rice aerial part per paddy 1 m, brown rice weight Kei acid content, and paddy field 1 m ² per obtained rice aerial part dry matter Was asked respectively. The results are shown in Table 3.

 As can be seen from Table 3, when the obtained granular kiosferous fertilizer was fertilized, the weight of dry matter above the rice and the percentage of dry matter above the dry matter above the rice were compared with Comparative Example 8 shown below, in which no fertilizer was applied. , And the weight of the refined brown rice obtained were all large, and were extremely effective in improving the nutrition of the caiic acid in paddy rice: In addition, when the fertilizer was granular fertilized, the crushed light-weight aerated concrete was fertilized. It was found that the fertilizer effect was almost the same.

Example 2

 In the granulation of Example 1, first, only 500 g of water was sprayed, and then an aqueous acrylic emulsion resin (Boritron U154 from Asahi Kasei Corporation (product resin solid content: 60% by weight)) Was diluted with water and the weight of resin solids. /. The granulation was carried out in the same manner as in Example 1 except that 30 g of a slurry solution adjusted to 20% by weight was sprayed, and granulation was carried out in the same manner as in Example 1. A granular silicate fertilizer having a sieve diameter of 1 to 10 mm was obtained. The content of the organic polymer in the granular silicic acid fertilizer is a value obtained from the addition amount of the aqueous acryl emulsion resin slurry during the granulation. Table 2 shows the results. In addition, the particle hardness of the granular kiosferous fertilizer, the pH measurement, and the measurement of the soluble kaic acid content were measured. Table 2 also shows the results.

When a transport test was performed on the granular silicate fertilizer in the same manner as in Example 1, the chipping rate was 0% by weight. /. There was almost no chipping or powder dropping by trucking. A mechanical spraying test was performed using the obtained granular kiosferous fertilizer in the same manner as in Example 1, and it was found that clogging and the like caused by the granular chiosic fertilizer did not occur, and that there was no problem with mechanical spraying. . In addition, this granular silicate fertilizer was handled with bare hands, but since it did not hurt the hand and had no problem of getting into the eyes, it was handled from the crushed lightweight foam concrete of Comparative Example 7. It turned out to be easy. In the same manner as in Example 1 using the particulate Kei acid fertilizer performs paddy development testing of rice paddy 1 m dry weight of rice aerial part per ^2, Kei acid content of rice aerial part dry matter,及beauty give The weight of refined rice per meter of paddy field was calculated. The results are shown in Table 3.

 As can be seen from Table 3, fertilization of the obtained granular silicate fertilizer compared with Comparative Example 8 in which no silicate fertilizer was fertilized, compared with Comparative Example 8 in which no fertilizer was applied, and the content of dry matter above the rice, and All of the obtained polished rice weights were large, and were extremely effective in improving the caiic acid nutrition of rice. In addition, it was found that the fertilizer effect of this granular silicate fertilizer was almost the same as that of Comparative Example 7 in which crushed lightweight cellular concrete was applied. Example 3

 In the granulation of Example 1, using an aqueous acrylemulsion resin slurry solution prepared by diluting the resin solid content of the aqueous acrylemulsion resin by weight with water so as to become 20% by weight, A granulated sieve fertilizer having a sieve diameter of 11 Omm was obtained in the same manner as in Example 1 except that granulation was carried out while spraying 232 g of this. The content of the organic polymer in the granular silicic acid fertilizer was determined from the amount of the sprayed aqueous acrylemulsion resin slurry during granulation. The results are shown in Table 2. In addition, the grain hardness of the granular kiosferous fertilizer, pH measurement, and soluble kaic acid content were measured. Table 2 also shows the results.

 A transport test was performed on the granular silicate fertilizer in the same manner as in Example 1. As a result, the chipping rate was 0% by weight, and there was no chipping or powder dropping due to truck transportation.

 A mechanical spray test was performed using the obtained granular kiosferous fertilizer in the same manner as in Example 1, and no clogging or the like was caused by the granular kiosferous fertilizer. It turns out that there is no. In addition, although the granular silicate fertilizer was handled with bare hands, it was found that it was easier to use than the crushed lightweight cellular concrete of Comparative Example 7 because it did not hurt the hands and had no problems with the powder getting into the eyes. Was.

A rice paddy cultivation test was carried out using this granular kiosferous fertilizer in the same manner as in Example 1, and the dry matter weight of the rice above the rice per paddy field, the content of the dry matter above the rice, and the obtained acid content were obtained. The weight of refined rice per 1 m ^{2 of} paddy was determined. The results are shown in Table 3. As can be seen from Table 3, the fertilizer application of the granular kiosferous fertilizer compared with Comparative Example 8 in which the fertilizer was not fertilized provided a dry matter weight in the aerial part of rice and a content of the citric acid in the dry matter in the aerial part of the rice. In addition, the weight of the polished rice was large, and it was extremely effective in improving the nutrition of caiic acid in paddy rice. In addition, it was found that the fertilizer effect of the present granular silicic acid fertilizer was almost the same as that of Comparative Example 7 in which the crushed lightweight cellular concrete was applied.

Example 4

 In place of the lightweight cellular concrete powder of Example 1, a lightweight concrete waste powder obtained by pulverizing the construction site waste of Asahi Kasei Kogyo Hebellite, which is lightweight cellular concrete waste, was used. A granular siliceous fertilizer having a sieve diameter of 1 to 10 mm was obtained in the same manner as in Example 1.

 Waste material from the construction site of Asahi Kasei Kogyo's Hebellite was beaten with a hammer to coarsely pulverize it to separate the internal reinforcing lath mesh from the lightweight cellular concrete. The lightweight cellular concrete portion was pulverized to obtain a lightweight cellular concrete waste material powder which was sieved with a sieve having an aperture of 250 μm and passed through the sieve. This lightweight foam concrete waste powder was used as a silicate-based raw material. The porosity measurement, tobermorite crystal measurement, and the measurement of the content of soluble kiic acid were performed on the kiyogenic raw material. The results are shown in Table 1. Using this raw material as a powder as it was, a granular raw material was obtained in the same manner as in Example 1. The content of the organic polymer in the granular silicate fertilizer was determined from the spray addition amount of the aqueous acryl emulsion resin slurry used for granulation. The results are shown in Table 2. In addition, grain hardness measurement, pH measurement, and soluble keic acid content measurement were performed on the granular silicate fertilizer. Table 2 also shows the results.

 A transport test was performed on the granular silicate fertilizer in the same manner as in Example 1. As a result, the chipping rate was 0% by weight, and there was no chipping or powder dropping due to truck transportation.

 A mechanical spraying test was performed using the obtained granular kiosferous fertilizer in the same manner as in Example 1, and it was found that clogging and the like caused by the granular chiosic fertilizer did not occur, and that there was no problem with mechanical spraying. . In addition, although the granular silicate fertilizer was handled with bare hands, it was easier to use than the crushed lightweight cellular concrete of Comparative Example 7 because it did not hurt the hands and there was no problem of getting the powder into the eyes. I understood.

A rice paddy cultivation test was performed using this granular silicate fertilizer in the same manner as in Example 1, Dry weight of rice aerial part per paddy 1 m ^2, Kei acid content of rice aerial part dry matter,及beauty resulting paddy 1 m ² per brown rice weight was determined, respectively. The results are shown in Table 3.

 As can be seen from Table 3, the fertilizer application of the granular kiosferous fertilizer compared with Comparative Example 8 in which the fertilizer was not fertilized provided a dry matter weight in the aerial part of rice and a content of the citric acid in the dry matter in the aerial part of the rice. In addition, the weight of the polished rice was large, and it was extremely effective in improving the nutrition of caiic acid in paddy rice. In addition, it was found that the fertilizer effect of the present granular silicic acid fertilizer was almost the same as that of Comparative Example 7 in which the crushed lightweight cellular concrete was applied.

Example 5

 A granular sieve fertilizer having a sieve diameter of 1 to 10 mm was obtained in the same manner as in Example 1 except that the sieve diameter of the powdery raw material used for granulation in Example 1 was changed.

 The lightweight aerated concrete powder produced in the same manner as in Example 1 was separated by a sieve into fine particles that passed through a sieve with an aperture of 250; m and medium particles with a sieve diameter of 250 to 475 μm. Separately, 70 parts by weight of fine particles and 30 parts by weight of medium particles were uniformly mixed to obtain a chiacid raw material. The porosity measurement, tobermorite crystal measurement, and the content of soluble citric acid of this kaic acid raw material were measured. The results are shown in Table 1. Using this raw material as a powder, the granular raw material was obtained in the same manner as in Example 1. The content of the organic polymer in the granular clay-based fertilizer was determined from the amount of the sprayed aqueous acrylemulsion resin slurry during granulation. The results are shown in Table 2. In addition, the granular hardness measurement, pH measurement, and soluble calcium content measurement of the granular calcium acid fertilizer were performed. Table 2 also shows the results.

 A transport test was performed on the granular silicate fertilizer in the same manner as in Example 1. As a result, the chipping rate was 0% by weight, and there was no chipping or powder dropping due to truck transportation.

 A mechanical spray test was performed using the obtained granular kiosferous fertilizer in the same manner as in Example 1, and it was found that there was no clogging by the granular chiosic fertilizer, and that there was no problem with mechanical spraying. . In addition, although this granular silicate fertilizer was handled with bare hands, it was easier to use than the crushed lightweight cellular concrete of Comparative Example 7 because it did not hurt the hands and there was no problem with the powder getting into the eyes. It turns out.

A rice paddy cultivation test was performed using this granular silicate fertilizer in the same manner as in Example 1, Dry weight of rice aerial part per paddy 1 m ^2, Kei acid content of rice aerial part dry matter,及beauty resulting paddy 1 m ² per brown rice weight was determined, respectively. The results are shown in Table 3.

 As can be seen from Table 3, fertilization of the obtained granular silicate fertilizer resulted in a higher dry weight of rice above the rice, a higher content of dry acid above the rice above the rice, and a higher yield than the comparative example 8 in which no fertilizer was applied. All of the brown rice weight was large, and it was extremely effective in improving the nutrition of caiic acid in rice. Also, it was found that the fertilizer effect of this granular silicate fertilizer was almost the same as that of Comparative Example 7 in which the crushed lightweight cellular concrete was applied.

Example 6

 9 kg of lightweight cellular concrete powder passed through a 250 μm sieve prepared in the same manner as in Example 1 and 5 O kg of distilled water were mixed, and 41.7 ml of 12N sulfuric acid was further added. After 7 days, the pH of the slurry supernatant at 20 ° C. was measured and found to be 8.0. The neutralized lightweight cellular concrete slurry is filtered through five kinds of C filter paper, and the solid portion on the filter paper is dried at 60 ° C for 3 days to remove water to a constant weight and neutralized lightweight cellular concrete powder. I got The neutralized lightweight cellular concrete powder was sieved to obtain a neutralized lightweight cellular concrete powder that passed through a sieve having an aperture of 250 μm. This neutralized lightweight cellular concrete powder was used as a raw material. The porosity of the second siliceous raw material and the content of the soluble silicic acid were measured. The results are shown in Table 4. Using this raw material as a powder as it was, a granular raw material of pH 8.0 was obtained in the same manner as in Example 1. The content of the organic polymer in the granular silicate fertilizer was determined from the amount of the sprayed aqueous acrylemulsion resin slurry used for granulation. Table 5 shows the results. Table 5 shows the results of measurement of the grain hardness, pH, and soluble keic acid content of this granular kiosferous fertilizer. A transport test was performed on the granular silicate fertilizer in the same manner as in Example 1. As a result, the chipping rate was 0% by weight, and there was no chipping or powder dropping due to truck transportation.

A mechanical spray test was performed using the obtained granular kiosferous fertilizer in the same manner as in Example 1, and no clogging was caused by the granular kiosferous fertilizer. It turns out that there is no. In addition, although the granular silicate fertilizer was handled with bare hands, there was no problem with the hands being hurt and the powder getting into the eyes. A rice paddy cultivation test was conducted using this granular kiosferous fertilizer in the same manner as in Example 1, and the dry matter weight of rice above the rice per 1π ^ of paddy, the content of the dry matter above the rice, and the acid content of rice were calculated. The weight of refined rice per 1π of the paddy field obtained was calculated. Table 6 shows the results.

 As can be seen from Table 6, fertilization of the obtained granular kiosferous fertilizer compared with Comparative Example 8 in which no fertilization was applied resulted in the weight of dry matter above rice, the content of kaic acid in dry matter above rice, and the yield. The weight of the refined brown rice was large, and it was extremely effective in improving the nutrition of caiic acid in rice. In addition, it was found that the fertilizer effect of the granular silicate fertilizer was superior to that of Comparative Example 7 in which the crushed lightweight foam concrete was applied.

Example 7

 9 kg of lightweight foam concrete powder passed through a 250 m sieve prepared in the same manner as in Example 1 and 50 kg of distilled water were mixed, followed by addition of 5800 ml of 12N sulfuric acid and stirring. Seven days later, the pH at 20 ° C. of the supernatant of the slurry was measured and found to be 5.0. The neutralized lightweight cellular concrete slurry is filtered through five types of C filter paper, and the solid portion on the filter paper is dried at 60 ° C for 3 days to remove moisture until a constant weight is obtained, and the neutralized lightweight cellular concrete is removed. A powder was obtained. The neutralized lightweight cellular concrete powder was sieved to obtain a neutral lightweight cellular concrete powder that passed through a sieve having an aperture of 250 μm. This neutralized lightweight cellular concrete powder was used as a kaic acid raw material. The porosity measurement and the content of the soluble kaic acid of this kaic acid raw material were measured. The results are shown in Table 4: A granular kiosferous fertilizer having a pH of 5.0 was obtained in the same manner as in Example 1 except that this chiosic raw material was used as a powder raw material as it was. The content of the organic polymer in the granular silicate fertilizer was determined from the amount of the sprayed aqueous acrylemulsion resin slurry used for granulation. Table 5 shows the results. Table 5 shows the results of the grain hardness measurement, pH measurement, and soluble keic acid content measurement of the granular kiosferous fertilizer.

 A transport test was performed on the granular silicate fertilizer in the same manner as in Example 1. As a result, the chipping rate was 0% by weight, and there was no chipping or powder dropping due to truck transportation.

When a mechanical spray test was performed using the obtained granular kiosferous fertilizer in the same manner as in Example 1, no clogging or the like was caused by the granular kiosferous fertilizer, and there was no problem with mechanical spraying. I knew it. In addition, although this granular silicate fertilizer was handled with bare hands, there was no problem that the hands were hurt and the powder could be seen by the eyes.

A rice paddy field cultivation test was carried out using this granular kiosferous fertilizer in the same manner as in Example 1, and the dry matter weight of the rice above the rice per meter of paddy, the content of the dry matter above the rice, and the obtained acid content were obtained. paddy 1 m ² the results obtained are brown rice weight per shown in Table 6 were. As can be seen from Table 6, fertilization of the obtained granular kiosferous fertilizer resulted in a higher weight of dry matter above the rice, a higher content of dry matter above the dry matter above the rice, and a higher yield than in Comparative Example 8 where no fertilization was applied. In addition, the weight of the refined brown rice was large, and it was extremely effective in improving the nutrition of caiic acid in rice. In addition, it was found that the fertilizer effect obtained by applying the granular silicate fertilizer was superior to that of Comparative Example 7 in which the crushed lightweight cellular concrete was applied.

Example 8

 9 kg of lightweight aerated concrete powder passed through a 250-μm sieve prepared in the same manner as in Example 1 and 5 O kg of distilled water were mixed, and 12N sulfuric acid was added, followed by 6142 ml. After 7 days of stirring, the pH of the supernatant of the slurry at 20 ° C. was measured to be 3.5. The neutralized lightweight cellular concrete slurry is filtered through five types of C filter paper, and the solid portion on the filter paper is dried at 60 ° C for 3 days to remove moisture until a constant weight is obtained, and the neutralized lightweight cellular concrete is removed. A powder was obtained. The neutralized lightweight cellular concrete powder was sieved to obtain a neutral lightweight cellular concrete powder that passed through a sieve having an aperture of 250 μm. This neutralized lightweight cellular concrete powder was used as a silicate-based raw material. The porosity measurement and the content of the soluble kaic acid of this kaic acid raw material were measured. The results are shown in Table 4. A granular kiosferous fertilizer was obtained in the same manner as in Example 1 except that this chiosilic raw material was used as a raw powder. The content of the organic polymer in the granular silicate fertilizer was determined from the sprayed amount of the aqueous acrylemulsion resin slurry solution used for granulation. Table 5 shows the results. The granular hardness, pH, and soluble kiic acid content of the granular kiosferous fertilizer were measured. Table 5 also shows the results.

 A transport test was performed on the granular silicate fertilizer in the same manner as in Example 1. As a result, the chipping rate was 0% by weight, and there was no chipping or powder dropping due to truck transportation.

A mechanical spray test was performed using the obtained granular silicate fertilizer in the same manner as in Example 1. However, it was found that there was no clogging caused by the granular silicate fertilizer, and there was no problem with mechanical spraying. In addition, although this granular silicate fertilizer was handled with bare hands, there was no problem that the hands were hurt and the powder could be seen by the eyes.

In the same manner as in Example 1 using the particulate Kei acid fertilizer performs paddy development testing of rice paddy 1 m dry weight of rice aerial part per ^2, Kei acid content of rice aerial part dry matter,及beauty give The weight of refined rice per paddy field was calculated. Table 6 shows the results. As can be seen from Table 6, fertilization of the obtained granular kiosferous fertilizer resulted in a higher weight of dry matter above the rice, a higher content of dry matter above the dry matter above the rice, and a higher yield than in Comparative Example 8 where no fertilization was applied. In addition, the weight of the refined brown rice was large, and it was extremely effective in improving the nutrition of caiic acid in rice. In addition, it was found that the fertilizer effect obtained by applying the granular silicate fertilizer was superior to that of Comparative Example 7 in which the crushed lightweight cellular concrete was applied.

Example 9

 1 O kg of neutralized lightweight cellular concrete powder having a pH of 5.0 passed through a sieve having a mesh size of 250 μππ, which was prepared in the same manner as in Example 7, and 10 kg of cultivated soil powder were mixed with a mortar mixer for 10 minutes. This was used as a powder raw material, and granulation was performed in the same manner as in Example 1. In the same manner as in Example 1, granulated silicic acid fertilizer mixed with sieving having a sieve diameter of 1 to 1 O mm was obtained. The cultivation powder used was a cultivation powder obtained by crushing and cultivating cultivation soil for paddy rice seedlings (granular bats made by Katakura Tikkalin Co., Ltd.) and then passing through a sieve with an aperture of 25 ° / 1m. The content of the organic polymer in the granular kiwiferous fertilizer mixed with the culture d: was determined from the spray addition amount of the aqueous acrylemulsion resin slurry solution used for granulation. Table 5 shows the results. In addition, grain hardness measurement, pH measurement, and soluble keic acid content measurement were performed on the granular silicate fertilizer mixed with the cultivated soil. Table 5 also shows the results.

 When a transportation test was conducted on the granular kiosferous fertilizer mixed with the soil as in Example 1, the chipping rate was 0% by weight, and there was no chipping or powder dropping by truck transportation.

A mechanical spraying test was conducted using the granular kiosferous fertilizer mixed with the obtained cultivation soil in the same manner as in Example 1. As a result, no clogging or the like due to the granular kiosferous fertilizer occurred, and there was no problem with mechanical spraying. Re, I understood. In addition, they handled the granular silicate fertilizer mixed with cultivated soil with bare hands, but they did not hurt their hands and there was no problem of powder getting into their eyes. Except that fertilizer mixed granular Kei acid fertilizer 8 O kg of soil, the same procedure as in Example 1, subjected to paddy development testing of rice, dry weight of rice aerial part per paddy 1 m ^2, rice aerial part Kei acid content of dry matter, and the resulting paddy 1 m ² per brown rice weight was determined, respectively. Table 6 shows the results. The reason why the fertilizer application rate of the granular kiosferous fertilizer mixed with the cultivated soil in the rice paddy growing test was twice that of Example 1 was that fertilizer was applied with almost the same amount of soluble kaic acid as in Example 1. As can be seen from Table 6, the fertilizer was fertilized with the granular kiosferous fertilizer in comparison with the non-fertilized Comparative Example 8 in terms of the weight of the dry matter above the rice, the content of the citric acid in the dry matter above the rice ground, and the weight of the refined rice obtained. All of them were large and very effective in improving the nutrition of keic acid in rice. In addition, it was found that the fertilizer effect obtained by applying the granular silicate fertilizer was superior to that of Comparative Example 7 in which the crushed lightweight cellular concrete was applied.

Example 10

 750 g of a granular kiosferous fertilizer having a pH of 5.0 produced in the same manner as in Example 7 was placed in a mixer (Eiritsu mixer R-02 type, manufactured by Nippon Eiritsu Co., Ltd.). While stirring the acid fertilizer, an aqueous acrylic emulsion resin (Polytron U154 (Asahi Kasei Kogyo Co., Ltd., product solid content 60% by weight)) was added to the surface of the resin while the resin solid content was increased. Spray 10 g of an aqueous acrylemulsion resin slurry solution diluted and adjusted to 12% by weight with water to wet the surface of the granular silicate fertilizer, and then apply 75 g of soil powder. The mixture was placed in the above-mentioned Iritz mixer, and an additional 66 g of an aqueous acryl emulsion resin slurry solution was further sprayed to perform granulation. After granulation, in the same manner as in Example 1, a coated granular silicate fertilizer coated with cultivated soil having a sieve diameter of 1 to 10 mm was obtained. The cultivation powder used at this time was obtained by crushing and drying the cultivation soil for paddy rice seedlings (Katakura Ciccarin Co., Ltd. Granulated Balls) and then passing through a sieve with an aperture of 250 μππι. is there. The content of the organic polymer in the coated granular silicate fertilizer was determined from the spray addition amount of the aqueous acryl emulsion resin slurry used for granulation and coating. The results are shown in Table 5. Also, the grain hardness, pH, and soluble kiic acid content of the coated kiwiferous fertilizer were measured. Table 5 also shows the results.

When a transportation test was performed on the coated granular silicate fertilizer in the same manner as in Example 1, the chipping rate was 0% by weight. /. There was no chipping or powder dropping by trucking. Profit A mechanical spraying test was performed using the coated granular kiosferous fertilizer in the same manner as in Example 1, and no clogging or the like was caused by the coated granular kiosferous fertilizer. It turned out that there was no problem.

A rice paddy growing test was conducted in the same manner as in Example 1 except that 80 kg of the coated granular silicate fertilizer was applied, and the dry matter weight of the rice above the rice paddy per paddy field and the dry matter above the rice paddy were calculated. content, and the brown rice weight of paddy 1 m ² per obtained was determined, respectively. Table 6 shows the results. The reason why the amount of fertilizer applied with the coated granular kiosferous fertilizer in the rice paddy field growing test was twice that of Example 1 was that fertilizer was applied with almost the same amount of soluble kaic acid as in Example 1. As can be seen from Table 6, the fertilizer was applied with the coated granular silicate fertilizer as compared with the non-fertilized Comparative Example 8, the weight of the dry matter above the rice, the content of the silicic acid in the dry matter above the rice, and the obtained yield. All of the polished rice have a large weight, which is extremely effective in improving the nutrition of caiic acid in rice. In addition, it was found that the fertilizer application with the coated granular silicate fertilizer was superior to that of Comparative Example 7 in which the crushed light cellular concrete was applied.

Example 1 1

 A neutralized lightweight cellular concrete powder having a pH of 6.8 was obtained in the same manner as in Example 6, except that 12N sulfuric acid was used in an amount of 528 Om1. This neutralized lightweight cellular concrete powder was used as a caytic raw material. The porosity measurement and the content of the soluble kaic acid of this kaic acid raw material were measured. Table 7 shows the results. Granulation was carried out in the same manner as in Example 1 using the raw material as a powder as it was, and granules having a sieve diameter of 1 to 6 mm and a pH of 6.8 were obtained using sieves having sieve openings of 1 mm and 6 mm. A silicate fertilizer was obtained. The content of the organic polymer in the granular silicate fertilizer was determined from the amount of the aqueous acryle marsion resin slurry solution used for granulation added by spraying. Table 8 shows the results. Table 8 shows the results of measurement of the particle hardness, pH, soluble kiic acid content, and underwater fibrous property of the granular kaic acid fertilizer. Further, the granular silicate fertilizer was left in a room at a temperature of 20 ° C. and a humidity of 70%, and the particle hardness was measured immediately after the production, 1 month after the production, 6 months after the production, and 1 year after the production. Table 9 shows the results.

A rice seedling raising test was performed using the granular caic acid fertilizer. 150 g of this granular K-acid fertilizer and cultivation soil for paddy rice raising seedlings (with granular bamboo pine made by Katakura Ciccarin Co., Ltd.) 1 5 0 g uniformly mixed with an initial suppression type coated fertilizer (Seedling box leaving NK 311-100 (N: 30%-P2O5: 0% —K, manufactured by Asahi Kasei Corporation) _{2 O:. 1 0%)} 7 0 0 g, damping-off preventing agent (Sankyo Co., Ltd. Tachigareesu) 6 g were mixed, and the bed soil for 1 seedling box more bed soil, sulfuric acid as haste fertilizer Ammonium, monocalcium phosphate, and potassium chloride were added, and nitrogen, phosphoric acid, and potassium were adjusted to 1.5 g for each seedling box.

 The seedlings (Koshihikari) (140 g) were evenly sown on this, well-watered, and cultivated for raising rice seedlings. did. Three days after sowing, the rate of seed exposure or root uptake and the germination rate of the emerged seedlings were measured. The results are shown in Table 10. Seedlings were grown for 35 days after sowing. There were no appearance problems such as leaf color of the seedlings or obstacles. Table 11 shows the results of measurement of the dry matter weight of the rice seedlings above the seedlings, the measurement of the content of keic acid above the seedlings, and the measurement of the dry matter weight below the seedlings (root).

 As can be seen from Table 10, the percentage of seed exposure or root uptake and the germination rate are the same as those obtained when the fertilizer was applied with the granular silicate fertilizer and without the fertilizer. As can be seen from the results, in the seedling raising test, the fertilizer treated with granular kiosferous fertilizer showed a higher dry matter weight on the seedling above ground, the content of the keic acid on the seedling above ground, The dry matter weight of the root was large, and the growth of rice seedlings was good. Examples 12 to 15

12 The addition amount of normal sulfuric acid was 5686 ml in Example 12, 5724 ml in Example 13 and 5875 ml in Example 14. In step 5, the same procedure as in Example 11 was carried out except that the amount was changed to 591.3 ml, to obtain a granular kiosferous fertilizer. Table 7 shows the results of measurement of the porosity and the content of the soluble caiic acid of this kaic acid raw material. The content of the organic polymer in the granular silicic acid fertilizer was determined from the amount of the aqueous acryl emulsion resin slurry solution used for granulation added by spraying. Table 8 shows the results. Table 8 shows the results of measurement of the particle hardness, pH, soluble caiic acid content, and shape retention in water of this granular kiosferous fertilizer. After leaving it in the star, the grain hardness was measured immediately after production, one month after production, six months after production, and one year after production. Table 9 shows the results. A rice seedling raising test was carried out using the obtained granular silicate fertilizer in the same manner as in Example 11: Three days after sowing, the percentage of seed exposure or root uptake and the germination rate of emerged seedlings were measured. Table 10 shows the results. The seedlings were raised for 35 days after sowing. There were no appearance problems such as leaf color or obstruction of the seedlings. Table 11 shows the results of the measurement of the dry matter weight of the rice seedlings above the seedlings, the measurement of the content of citric acid in the above seedlings, and the measurement of the dry matter weight of the seedlings below ground (root). As can be seen from Table 10, in the germination test, those obtained by applying the obtained granular kiosferous fertilizer and those without using the kiosferous fertilizer had similar good results, as can be seen from Table 11 In addition, in the seedling raising test, the fertilized granular silicate fertilizer was compared with Comparative Example 9 where no fertilizer was used. The dry matter weight of both was large, and the growth of rice seedling was good:

Example 16

 Example 11 10 kg of neutralized lightweight cellular concrete powder of ρ 6.8 passed through a sieve with a mesh of 250 m prepared as in Example 1 and 10 kg of cultivated soil powder for 10 minutes with a normal mortar mixer The mixture was used as a powder raw material. The cultivation powder used at this time is the same as the cultivation powder of Example 9. Using this powdery raw material, granulation was carried out in the same manner as in Example 1, and a granular silicic acid fertilizer mixed with cultivated soil having a sieve diameter of up to 6 mm was obtained in the same manner as in Example 11. The content of the organic polymer in the granular silicic acid fertilizer mixed with the cultivated soil was determined from the added amount of the aqueous acrylemulsion resin slurry solution used for granulation. Table 12 shows the results. In addition, the granular hardness measurement, pH measurement, soluble kiic acid content measurement, and underwater shape-retention measurement of the granular kiosferous fertilizer mixed with this soil were performed. The results are also shown in Table 12.

Example 1 150 g of granular caic acid fertilizer and 150 g of paddy rice seedling cultivation soil (with a granular bamboo matsutake made by Katakura Ciccarin Co., Ltd.) used in the rice seedling test of Example 1 were mixed uniformly. A rice seedling test was carried out in the same manner as in Example 11 except that 300 g of a granular kaic acid fertilizer mixed with the cultivated soil obtained in this example was used instead of the rice seedling test. Three days after sowing, the percentage of seed exposure or root uptake and the germination rate of the emerged seedlings were measured. The results are shown in Table 13: After the seedlings were grown for 35 days after sowing, the appearance of the seedlings such as leaf color and impairment was observed. There was no problem above. Table 14 shows the results of the dry matter weight measurement of the seedlings above the rice seedlings, the measurement of the content of caic acid in the above seedlings, and the measurement of the dry matter weight of the rice seedlings underground (root). As can be seen from Table 13, in the present germination test, the results obtained with the fertilizer applied with the granular silicate fertilizer of the present example and the results obtained without the use of the silicate fertilizer were the same. As can be seen from Fig. 4, in the seedling raising test, the dry matter weight in the seedling above-ground and the content of the keic acid in the above-seeding of the seedlings to which the granular kiosferous fertilizer of this example was applied compared to Comparative Example 9 which did not use it. However, the dry matter weight in the underground part (root) of the seedlings was large, and the growth of rice seedlings was good. Example 17: 8

 Except for using a neutralized lightweight cellular concrete powder having a different pH, a granular silicate fertilizer was prepared in the same manner as in Example 16 except that soil was mixed. In Example 17, a neutralized lightweight cellular concrete powder having a pH of 5.2 produced in the same manner as in Example 13 was used. In Example 18, a neutralized lightweight cellular concrete powder of pH 4.1 produced in the same manner as in Example 14 was used. The content of the organic polymer in the granular silicic acid fertilizer mixed with this soil was determined from the amount of the aqueous acryle margillon resin slurry solution used for granulation added by atomization. Table 12 shows the results. Table 12 shows the results of measurement of the particle hardness, pH, soluble kiic acid content, and shape retention in water of the granular kiosferous fertilizer mixed with this soil.

 A rice seedling test was carried out in the same manner as in Example 16 using a granular kaic acid fertilizer obtained by mixing these soils. Three days after sowing, the percentage of seed exposure or root uptake and the germination rate of the emerged seedlings were measured. The results are shown in Table 13: Seedlings were further raised for 35 days after sowing. There were no appearance problems such as leaf color or obstacles of the seedlings. Table 14 shows the results of the measurement of the dry matter weight of the rice seedlings above the seedlings, the measurement of the content of citric acid in the above seedlings, and the measurement of the dry matter weight of the seedlings underground (root). As can be seen from Table 13, in the germination test, the results obtained with the fertilizer treated with the granular kiosferous fertilizer and those without the use of the chiosic fertilizer were the same, but as shown in Table 14, the seedling raising In the test, the fertilized granular silicate fertilizer was compared with Comparative Example 9 which did not use the fertilizer, and the dry matter weight at the top of the seedlings, the content of the silicate in the seedlings, and the dry matter at the lower part (root) of the seedlings All were large, and the growth of rice seedlings was good.

Example 19

A granular siliceous fertilizer having a pH of 6.8, produced in the same manner as in Example 11, was coated with cultivation soil in the same manner as in Example 10 using sieves having a sieve opening of 1 mm and 6 mm. Was used to obtain a coated granular silicate fertilizer having a sieve diameter of 1 to 6 mm. This coated granular caic acid The content of organic polymer in the fertilizer was determined from the amount of the sprayed aqueous acryl emulsion resin slurry used for granulation and coating. Table 12 shows the results. In addition, grain hardness measurement, pH measurement, soluble kiic acid content measurement, and measurement of shape retention in water were performed on the coated granular silicate fertilizer. The results are also shown in Table 12.

 A rice seedling test was carried out in the same manner as in Example 16 except that the obtained coated granular kaic acid fertilizer was used in place of the granular kaic acid fertilizer mixed with the cultivated soil of Example 16. Three days after sowing, the percentage of seed exposure or root uptake and the germination rate of the emerged seedlings were measured. Table 13 shows the results. The seedlings were raised for 35 days after sowing. There were no appearance problems such as leaf color or obstruction of the seedlings .: Measurement of dry matter weight of the rice seedlings above the seedlings, measurement of the content of caicic acid above the seedlings, and measurement of dry matter weights of the seedlings below the roots Table 4 shows:

 As can be seen from Table 13, in the present germination test, those obtained by applying the coated granular silicate fertilizer of the present example and those not using the silicate fertilizer had the same good results. As can be seen from the results, in the seedling raising test, the fertilizer coated with the coated granular silicate fertilizer of the present example showed a dry matter weight above the seedlings and a content of the silicate containing the seedlings as compared with Comparative Example 9 which did not use the fertilizer. Both the rate and the dry weight of the underground part (root) of the seedlings were large, and the growth of rice seedlings was good.

Example 20 to 21

A coated granular kiosferous fertilizer having a different pH was obtained in the same manner as in Example 19 except that a granular kiosferous fertilizer having a different pH was used. In Example 20, a granular silicic acid fertilizer having a pH of 5.2 prepared in the same manner as in Example 13 was used. In Example 21, a granular silicic acid fertilizer having a pH of 4.2 produced in the same manner as in Example 15 was used. The content of organic polymer in these coated granular silicate fertilizers was determined from the amount of aqueous acrylemulsion resin slurry used for granulation and coating. _C showing the results shown in Table 1 2 The particle hardness of these coated granular Kei acid fertilizer, p H, soluble Kei acid content, the measurement results of the water-shaped維性Table 1 2

Using these coated granular kaic acid fertilizers, a rice seedling test was conducted in the same manner as in Example 19. Three days after sowing, the rate of seed exposure or root uptake and the germination rate of the emerged seedlings were measured. Table 13 shows the results. The seedlings were raised for 35 days after sowing. There were no appearance problems such as leaf color or obstacles of the seedlings. Dry matter weight measurement of the rice seedlings Table 14 shows the results of the measurement of the content of caiic acid in the upper part and the measurement of the dry weight of the underground part (root) of the seedlings.

As can be seen from Table 13, in this germination test, the results obtained with the fertilizer coated with the coated granular silicate fertilizer and those without the use of the silicate fertilizer were the same as those shown in Table 14. Thus, in the seedling raising test, in the case of the fertilizer coated with the granular silicic acid fertilizer, the dry matter weight above the seedlings, the content of the keic acid above the seedlings, the underground seedlings (root both large dry weight), _c growth of rice seedlings was good

Comparative Example 1

 In the granulation of Example 1, an aqueous acrylic emulsion resin (Polytron U154 from Asahi Kasei Corporation (product resin solid content: 60% by weight)) was sprayed with water without spraying water. Granulation was carried out in the same manner as in Example 1 except that 666 g of a slurry solution diluted and adjusted to 7% by weight of the resin solid content was sprayed, and the organic polymer was contained. A 3.0% by weight granular sieve fertilizer having a sieve diameter of 1 to 10 mm was obtained. The particle hardness was measured and found to be 1.4 kg.

 A transport test was performed on the granular kiosferous fertilizer in the same manner as in Example 1. As a result, the chipping rate was 3%.

Comparative Example 2

 In the granulation of Example 1, the water-based acryl emulsion resin (Polytron U154 (product resin solid content: 60% by weight) manufactured by Asahi Kasei Kogyo Co., Ltd.) was diluted with water without spraying water. The granulation operation was performed in the same manner as in Example 1 except that the granulation operation was performed while spraying 928 g of the slurry solution adjusted so that the weight% of the organic polymer became 5% by weight. An attempt was made to obtain a granular kiosferous fertilizer with a content of less than 3.0% by weight and a granular hardness of 2 to 5 kg. However, the raw material became large lumps during granulation, and a granulated product could not be obtained.

Comparative Example 3

 The granulation of the siliceous fertilizer was performed using the lightweight aerated concrete powder by the conventional method.

90.5 parts by weight of water was added to 7.7 parts by weight of corn starch, and the mixture was stirred and suspended, and then gradually heated to a temperature of 80 ° C. Thereafter, 1.2 parts by weight of a 48% sodium hydroxide solution was added, and stirring was continued for 30 minutes while heating. Then cooling This was used as a granulating agent (hereinafter, referred to as constarch granulating agent).

 To 100 parts by weight of a lightweight cellular concrete powder having a sieve diameter of 250 μιη or less prepared in the same manner as in Example 1, 10 parts by weight of a corn starch granulating agent, and 25 parts by weight of water, and then mixed well Granulation was performed with a bread granulator. The obtained granules were dried at 105 C for 12 hours, and then, a granulated product having a sieve diameter of 1 to 4 mm was obtained using a sieve having a mesh size of 4 mm and 1 mm.

 The hardness of this granulated product was measured to be 0 kg. When the product was packed in a 20 kg bag and taken out, 90% of the granules collapsed in the bagging operation, and powder and the like fluttered. I got it.

Comparative Example 4

 A granulated product having a sieve diameter of 1 to 4 mm was obtained in the same manner as in Comparative Example 1, except that 25 parts by weight of a corn starch granulating agent was added to 100 parts by weight of the lightweight cellular concrete powder. The hardness of this granulated product was measured to be 0.2 kg, and when the product was packed in a 20 kg bag and taken out, 30% of the granules collapsed in the bagging operation, and powder etc. flew. I got it.

Comparative Example 5

 Granulation was performed using lightweight aerated concrete powder and sodium alginate as a binder.

7. alginate source one da of 7 parts by weight, 9 were suspended by stirring by adding 0.5 parts by weight of water, and the temperature was raised to 8 0 ^e C is heated gradually. Thereafter, 1.2 parts by weight of a 48% sodium hydroxide solution was added, and stirring was continued for 30 minutes while heating. Then, the cooled product was used as a sodium alginate granulating agent.

To 100 parts by weight of lightweight cellular concrete powder having a sieve diameter of 250 / m or less prepared in the same manner as in Example 1, 7 parts by weight of a sodium alginate granulating agent, and 280 parts by weight of water are added. After mixing, granulation was performed with a bread granulator. The resulting granules were dried at 105 ° C. for 12 hours, and then a granulated product having a sieve diameter of 1 to 4 mm was obtained using a sieve having a mesh size of 4 mm and 1 mm. When the hardness of this granulated product was measured, it was 0 kg.When the product was packed in a 20 kg bag and taken out, 80% of the granules collapsed during the bagging operation, and powder etc. was disturbed. . Comparative Example 6

 A granulated product having a sieve diameter of 1 to 4 mm was obtained in the same manner as in Comparative Example 3, except that 54 parts by weight of a sodium alginate granulating agent was added to 100 parts by weight of the lightweight cellular concrete powder. When the hardness of this granulated product was measured, it was 0.2 kg, and when it was packed in a 20 kg bag and taken out, 30% of the granules collapsed in the bagging operation, and powder etc. fluttered and handled 7

Comparative Example 7

 A paddy field test using crushed lightweight cellular concrete as crushed silicate fertilizer is shown. As a lightweight cellular concrete, Hebellite manufactured by Asahi Kasei Kogyo Co., Ltd. was hit with a hammer and roughly crushed to separate the internal reinforcing lath mesh portion and the lightweight cellular concrete portion. The lightweight aerated concrete portion was crushed to obtain a crushed silica acid fertilizer having a sieve diameter of 1 to 10 mm using a sieve having a mesh of 1.0 mm and a sieve having a mesh of 10 mm. Grain hardness measurement, pH measurement, and soluble kiic acid content measurement of the crushed kaic acid fertilizer were performed. The results are shown in Table 2.

 When a transport test was performed on the granular silicate fertilizer in the same manner as in Example 1, the chipping rate was 6.5% by weight.

Using the obtained crushed silicate fertilizer, fertilizer was mechanically sprayed in the same manner as in Example 1, but the crushed silicate fertilizer was clogged at the fertilizer spraying hobber outlet and could not be mechanically sprayed. Therefore, rice paddy fields were cultivated in the same manner as in Example 1 except that crushed silicate fertilizer was sprayed by hand. When the crushed silicate fertilizer was handled with bare hands in the same manner as in Example 1, there was a problem that the hands were finely scratched and the powder was caught in the eyes. Paddy rice was grown in the same manner as in Example 1, except that the crushed silicic acid fertilizer was used instead of the granular silicic acid fertilizer of Example 1. As in Example 1, subjected to rice harvest in mid September, dry weight of rice aerial part per paddy 1, Kei acid content of rice aerial part dry matter, and brown rice weight of paddy 1 m ² per obtained Was asked respectively. The results are shown in Table 3. When the crushed lightweight cellular concrete was fertilized, the fertilizer effect was almost the same as in Examples 1 to 5.

Comparative Example 8

The same as in Example 1 except that the granular silicate fertilizer of Example 1 was not fertilized. Paddy field training. As in Example 1, subjected to harvest in mid September, paddy lm ² per dry weight of Rinoine aerial part, Kei acid content of rice aerial part dry matter, and the resulting paddy 1 m ² per nymph Brown rice weight was determined for each. The results are shown in Table 3.

 As can be seen from Table 3, when the fertilizer was not fertilized, the weight of the dry matter above the rice, the content of the citric acid in the dry matter above the rice, and the weight of the refined rice were higher than in Examples 1 to 5 in which fertilization was applied. All were small and were not better than Examples 1 to 5 in terms of the nutrition of rice. Comparative Example 9

 The result of having performed the rice seedling raising test without using the silicate fertilizer is shown.

 300 g of rice seedling cultivation soil (with granulated batar made by Katakura Ticcarin Co., Ltd.) Example 1 1 500 g of granulated Ca-acid fertilizer and paddy rice cultivation soil (Katakura Ticcarin Co., Ltd.) Rice seedling raising test was performed in the same manner as in Example 11 except that 150 g of (with a certain Matsumoto) was used in place of the uniformly mixed one.

 Three days after sowing, the ratio of seed exposure or root uptake and the germination rate of the emerged seedlings were measured and are shown in Table 10. The seedlings were raised for 35 days after sowing. There were no external problems such as seedling leaf color or obstacles. Table 11 shows the results of the measurement of the dry matter weight of the rice seedlings above the seedlings, the measurement of the content of keic acid in the above seedlings, and the measurement of the dry matter weight below the seedlings (roots).

Comparative Example 10

 The results of a rice seedling test using crushed lightweight aerated concrete as crushed Ca-acid fertilizer are shown.

 Example 11 Except for using 150 g of the granular kaic acid fertilizer of Example 1, except that 150 g of the crushed kaic acid fertilizer having a sieve diameter of 1 to 6 mm obtained in the same manner as in Comparative Example 7 was used. In the same manner as in Example 11, a rice seedling raising test was conducted.

 3 days after sowing, the percentage of seed exposure or root uptake and the germination rate of the emerged seedlings were measured.

0 is shown. The seedlings were raised for 35 days after sowing. The seedling had a yellowish leaf color. Apparently, it grew slowly and the leaf color became yellow, but no disease was observed. Measurement of dry matter weight of above rice seedlings above ground, measurement of caiic acid content of above rice seedlings, seedling underground

Table 11 shows the results of dry weight measurement of (root). The germination of rice seedlings and their growth after raising were poor. table 1

表 2

Table 2

 Examples and silicate fertilizer

 Comparative Example Organic Polymer Grain Hardness Measurement pH Measurement Soluble Caic Acid Content Content

 (kg)

Example 1 1. 2. 3. 1 1 0.55 Example 2 0.4. 2. 2. 1 0.59 Example 3 3. 0 4. 5 1 0.57 Example 4 1. 2. 3. 0 1 0.22 28 Example 5 1.2 2 1 1 0.52 Comparative example 7 0.3 1 0.228

Table 3

表 4

Table 4

 Examples and Kay acid raw materials

 Comparative Example Porosity Measurement Soluble Keiic Acid Content

 (%)

 Example 6 6 5 2 6

 Example 7 6 4 2 6

 Example 8 6 2 2 6

 Example 9 6 4 2 6

 Example 1 0 6 4 2 6

Examples and silicate fertilizer

 Comparative Example Organic Polymer Grain Hardness Measurement pH Measurement Soluble Keiic Acid

 '' Content of 3

(Weight%) (kg) (Weight%) Example 6 1.2. 188.0 26 Example 7 1.2 3.0 5.0 2 6 Example 8 1.2.3.13. 5 2 6 Example 9 1.2 2 • 6 4 8 1 4 Example 10 1. 2 2. 2 4. 8 1 4 Table 6

表 7

Table 7

表 8

Table 8

 Examples and silicate fertilizer

 Comparative Example Organic Polymer Grain Hardness P H Soluble C

 One content Acid content Persistence

(kg) (% by weight) (Remarks) Example 1 1 1. 2. 3. 0 6. 8 2 6 7 Example 1 2 1. 2 3. 0 5. 9 2 6 8 Example 1 3 1. 2 3 1 5.2 2 6 9 Example 1 4 1. 2 3. 0 4. 5 2 6 9 Example 1 5 1. 2 3. 0 4. 1 2 6 8 Table 9

表 1 o

Table 1 o

表 1 1

Table 11

 Example and Dry Matter Weight of Seedling Above Seedlings Comparative Example of Underground Seedling (Root) of Caic Acid Content Dry Matter Weight

(g) (g) Example 1 1 23.2 6.5 6.8 Example 1 2 23.7 6.7 7.4 Example 1 3 26.4 6.8 7.99 Example 14 27. 3 6. 8 8.2 Example 1 5 24. 6 6. 1 7.2 Comparative example 7 1 9. 2 1. 2 5.6 Comparative example 10 1 5. 8 4. 2 4.2 Table 1 2

表 1 3

Table 13

表 1 4

Table 14

産業上の利用可能性

Industrial applicability

The granular silicate fertilizer of the present invention has a small amount of binder and has a sufficiently high particle hardness, so that it is not easily chipped and hardly falls off during transportation or spraying. In addition, the granular silicate fertilizer of the present invention has a large fertilizer effect as a silicate fertilizer. The granular silicate fertilizer of the present invention comprises: Due to the shape, it is easy to spray by machine, easy to spread even by hand, and less likely to get in your eyes or scratch your hands when spreading. In addition, due to the granular nature, the roots have good ventilation and the roots grow well.

 Furthermore, waste materials containing hydrated calcium silicate crystals obtained by hydrothermal synthesis, such as lightweight cellular concrete, can be used as a raw material for fertilizer as a recycled material, so that the amount of waste can be reduced. Furthermore, the manufacturing process is simple, and as a result, it is possible to supply the siliceous fertilizer at low cost.

 In addition, the granular silicic acid fertilizer, which is obtained by neutralizing the silicic acid material with an acid and adjusting the pH to 3.5 to 8.0, has an effect as a silicic acid fertilizer in both rice paddy fields and seedlings. it was high.

Claims

The scope of the claims 1. A granular kiwiferous fertilizer obtained by adding an organic polymer as a binder to a powdery raw material containing a kioioritical raw material having a porosity of 50 to 90%, and granulating the raw material. The granular siliceous fertilizer having a content of 0.1% by weight or more and 3% by weight or less and a grain hardness of 2 to 5 kg.  2. The granular silicic acid fertilizer according to claim 1, wherein the silicic acid raw material is a silicic acid material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis.  3. The silicate material is obtained by neutralizing the silicate material containing calcium silicate hydrate crystals obtained by hydrothermal synthesis with an acid and adjusting the pH to 3.5 to 8.0. 2. The granular silicate fertilizer according to claim 1.  4. The granular kiosferous fertilizer according to claim 1, 2 or 3, wherein the powdery raw material is 100% by weight of a kiyamic raw material.  5. The granular silicate fertilizer according to claim 1, 2 or 3, wherein the powdery raw material contains a silicate content of 40% by weight or more and less than 100% by weight.  6. The granular silicic acid fertilizer according to claim 5, wherein the powdered raw material includes a silicic acid raw material and soil.  7. The granular siliceous fertilizer according to any one of claims 1 to 6, wherein the powdery raw material contains 70 to 100% by weight of particles passing through a sieve having an opening of 250 µm.  8. The granular silicate fertilizer according to any one of claims 1 to 7, wherein the organic polymer is an aqueous acrylic emulsion resin or a styrene-butadiene copolymer emulsion resin.  9. The granular silicic acid fertilizer according to any one of claims 1 to 8, wherein the granular silicic acid fertilizer has a sieve particle size of 1 to 2 Omm.  10. A coated granular kiosaceous fertilizer obtained by coating the granular kiosaceous fertilizer according to any one of claims 1 to 9 with a soil. 11. Spray and impregnate the powder raw material with a liquid in an amount of 10 to 50% by weight of the powder raw material, and then add the organic polymer solution or dispersion and granulate by stirring. A method for producing a granular silicic acid fertilizer according to any one of claims 1 to 9, comprising: Law.  12. A method for cultivating a plant, comprising using the granular siliceous fertilizer according to any one of claims 1 to 9 as a fertilizer for cultivation soil.  13. A method for cultivating rice, comprising using the granular chiosic fertilizer according to any one of claims 1 to 9 as a fertilizer for rice cultivation.  14. A method for cultivating rice, comprising using the granular silicate fertilizer according to claim 3 as a soil fertilizer for cultivating rice seedlings.  15. A method for cultivating rice, comprising using the coated granular silicate fertilizer according to claim 11 as a bed soil for cultivating rice seedlings.