CN103880535A - Preparation method of slow-release compound fertilizer - Google Patents
Preparation method of slow-release compound fertilizer Download PDFInfo
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- CN103880535A CN103880535A CN201410112814.4A CN201410112814A CN103880535A CN 103880535 A CN103880535 A CN 103880535A CN 201410112814 A CN201410112814 A CN 201410112814A CN 103880535 A CN103880535 A CN 103880535A
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 150000001875 compounds Chemical class 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000004202 carbamide Substances 0.000 claims abstract description 18
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 17
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 17
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 17
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims abstract description 17
- 229910052939 potassium sulfate Inorganic materials 0.000 claims abstract description 14
- 235000011151 potassium sulphates Nutrition 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 9
- 239000006012 monoammonium phosphate Substances 0.000 claims abstract description 9
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 34
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 30
- 239000011230 binding agent Substances 0.000 claims description 26
- 210000003608 fece Anatomy 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 239000006228 supernatant Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 239000008187 granular material Substances 0.000 claims description 10
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 238000010298 pulverizing process Methods 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000010871 livestock manure Substances 0.000 claims description 9
- 244000144972 livestock Species 0.000 claims description 8
- 244000144977 poultry Species 0.000 claims description 8
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 6
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 6
- 238000010564 aerobic fermentation Methods 0.000 claims description 6
- 235000013877 carbamide Nutrition 0.000 claims description 6
- 239000002068 microbial inoculum Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000000855 fermentation Methods 0.000 claims description 5
- 230000004151 fermentation Effects 0.000 claims description 5
- 238000010907 mechanical stirring Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000008399 tap water Substances 0.000 claims description 5
- 235000020679 tap water Nutrition 0.000 claims description 5
- -1 13~17 parts Substances 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 241000287828 Gallus gallus Species 0.000 claims description 2
- 241001494479 Pecora Species 0.000 claims description 2
- 235000015097 nutrients Nutrition 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 239000007767 bonding agent Substances 0.000 abstract 1
- 239000003895 organic fertilizer Substances 0.000 abstract 1
- 238000005453 pelletization Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000050 nutritive effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 208000000509 infertility Diseases 0.000 description 1
- 231100000535 infertility Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 235000015816 nutrient absorption Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000013278 single fertilization Effects 0.000 description 1
Landscapes
- Fertilizers (AREA)
Abstract
The invention relates to a preparation method of fertilizers, in particular to a preparation method of a slow-release compound fertilizer. The method comprises the following steps: blending 38-48 parts by mass of decomposed organic fertilizer, 21-27 parts by mass of liquid preparation serving as a liquid bonding agent, 13-17 parts by mass of urea, 9-13 parts by mass of monoammonium phosphate and 6-8 parts by mass of potassium sulfate; pelletizing. The method has the advantages of low cost, simple production process, effective prevention of nitrogen loss, slow release of nutrients, long period and high fertilizer efficiency.
Description
Technical field
The present invention relates to a kind of preparation method of fertilizer, especially relate to a kind of preparation method of slow release type Chemical Mixed Fertilizer.
Background technology
Fertilizer is to provide the necessary nutritive element of crop, can change soil constitution, increases soil fertility, and increases soil organic substance.Thereby the rational application of fertilizer is to the growing of crop, and promotes crop metabolism, improves crop yield per unit and play conclusive effect.For avoiding fertilizer nutrient excessive supply in soil, coordinate the contradiction between soil nutrient supply and plant nutrient absorption, improve plant recovery of nutrient and reduce the harm to environment, exploitation slow release fertilizer is effective measure the most efficient and convenient, that can fundamentally solve fertilizer loss problem.Slow release fertilizer refers to that to change the rate of release of plant effective state nutrient after incorporation of fertilizerin the soil into slower than Quick-dissolving fertilizer.Slow release fertilizer has nutrient and discharges slowly, and Crop is many, and the feature that plant recovery of nutrient is high is used slow-release fertilizer and can be simplified work program, saving of work and time.Current slow release fertilizer both domestic and external is the fertilizer that extends fertilizer efficiency by the physico-chemical process of coating, parcel, packing, coating, and Quick-dissolving fertilizer is reacted to formed parcel or coated fertilizer with high molecular polymers such as polyvinyl alcohol, urea aldehyde, sulphur, alkyd based resin, polyurethanes resins, not only coating cost is high for these fertilizer, hard degradation, and environment is had to negative effect, thereby limit their application.Therefore develop a kind of cost-saving and preparation method is simple, the slow-release bio fertilizer of economic environmental protection is very important.
Also do not overcome so far the method for above-mentioned defect.
Summary of the invention
The object of the invention is to overcome the defect of prior art, the preparation method that a kind of low cost, production technique are simple, can effectively prevent a kind of slow release type Chemical Mixed Fertilizer that nitrogen loss, nutrient discharge slowly, the cycle is long, fertilizer efficiency is good is provided.
The present invention realizes in the following way:
A kind of preparation method of slow release type Chemical Mixed Fertilizer, it is characterized in that: the method comprises the steps: take a kind of liquid preparation as binding agent, decomposed manure, the blend granulations such as urea, monoammonium phosphate, potassium sulfate form, the mass fraction of its raw material is: 38～48 parts of decomposed manures, 21～27 parts of liquid-containing binders, 13～17 parts, urea, 9～13 parts of monoammonium phosphates, 6～8 parts of potassium sulfate;
The preparation method of described decomposed manure is: according to the mass fraction, and by 40～60 parts of the furfural dregs of pulverizing, 20～35 parts of dregs of beans, 15～25 parts of feces of livestock and poultry, 1～2 part of EM microbial inoculum mixes, and regulates moisture to 55%～60%, piles to fermenter and carries out aerobic fermentation, in the time that rising to more than 55 ℃, heap temperature starts turning, every turning in 7 days once, turning for the third time, after 3～5 days, is shifted out fermenter by material later, airing makes moisture content to 25%～30%, for subsequent use;
The preparation method of described liquid-containing binder adds potassium hydroxide after the furfural dregs having fermented and tap water are weighed by the mass ratio of 1:7～1:10, the massfraction that makes potassium hydroxide in solution is 2.5%～3.5%, keep bath temperature at 60～80 ℃, naturally cooling standing 24h after mechanical stirring 2～3h, pour out supernatant liquor, then to mix in supernatant liquor account for the wilkinite of supernatant liquor total mass 1～3% or diatomite can obtaining liq binding agent;
Described granulation process is for pressing mass fraction, get 13～17 parts, urea, 9～13 parts of monoammonium phosphates, 6～8 parts of potassium sulfate mix after the liquid-containing binder stirring and dissolving that adds above-mentioned 21～27 parts after pulverizing stand-by, get again 38～48 parts of above-mentioned fermentation maturity fertilizers and be placed in granulating disc granulation, disk adds the above-mentioned urea that contains in rotating, monoammonium phosphate, the liquid-containing binder of potassium sulfate, after granulating and forming, granule materials is sent into roller drying machine and carry out drying and processing, bake out temperature is 200-250 ℃, granule materials moisture≤2.5% of drying, screening makes the granular fertilizer of 2～4.75mm,
Described feces of livestock and poultry be in chicken, pig, ox and sheep ight soil any one, any two kinds, the mixture of any three kinds or four kinds.
The present invention has following effect:
1) low cost, production technique are simple: slow release type Chemical Mixed Fertilizer of the present invention is take a kind of liquid preparation as binding agent, and decomposed manure, the blend granulations such as urea, monoammonium phosphate, potassium sulfate form.Mass percent is: 38～48 parts of decomposed manures, 21～27 parts of liquid-containing binders, 13～17 parts, urea, 9～13 parts of monoammonium phosphates, 6～8 parts of potassium sulfate.Described decomposed manure is with 40～60 parts of furfural dregs, 20～35 parts of dregs of beans, and 15～25 parts of feces of livestock and poultry are raw material, add 1～2 part of EM microbial inoculum, make through aerobic fermentation.
2) nutrient discharge slow, release period is long: the fertilizer rate of release of this product is slow, release period is long, thereby fertilizer nutrient effective rate of utilization is greatly improved.Compared with other fertilizer of same concentration, fertilizer efficiency utilization ratio can improve 30～50%, and the consumption of traditional fertilizer is greatly reduced, and also can play active effect to environmental improvement.
3) scientific formulation, improve planting benefit and quality product: the present invention is prepared into slow-release fertilizer according to the ratio of science, can make Nitrogen element nutrien utilization improve 30～50%, single fertilization just can meet the demand to nutritive ingredient in crop time of infertility, compared with common fertilizer, amount of increase in production reaches 6～10%, has the cost of using low, to features such as Soil Environmental Pollution are little.The in the situation that of the identical output of crop, can reduce by 35～55% rate of fertilizer.The crop single-dose application of one season, saving of work and time, economic benefit is obvious.
4) realized refuse reclamation, increased the economic value added of furfural dregs: furfural dregs is as the waste producing in biomass by hydrolyzation process, its salt content is high, be acid, and bulk deposition can produce and pollute atmosphere, soil, river.In furfural dregs, contain a large amount of Mierocrystalline celluloses, hemicellulose, xylogen, there is good recycle value.Recycling has been developed reasonably in the success of this product furfural dregs, eliminate its pollution to environment, increase the economic value added of furfural dregs simultaneously, realized the zero release of pollutant target in furfural enterprise production process, reached the object of cleaner production, the cyclic utilization of waste.
Embodiment
Embodiment mono-: a kind of preparation method of slow release type Chemical Mixed Fertilizer, is characterized in that: the method comprises the steps:
1) according to the mass fraction, by 40 parts of the furfural dregs of pulverizing, 35 parts of dregs of beans, 24 parts of feces of livestock and poultry, 1 part of EM microbial inoculum mixes, and regulates moisture to 55%, piles to fermenter and carries out aerobic fermentation.In the time that rising to more than 55 ℃, heap temperature starts turning, once every turning in 7 days later.After turning for the third time 3 days, material is shifted out to fermenter, airing makes moisture content to 25%, for subsequent use.
2) preparation of liquid-containing binder.After being weighed by the mass ratio of 1:7, the furfural dregs having fermented and tap water add potassium hydroxide, the massfraction that makes potassium hydroxide in solution is 2.5%, keep bath temperature at 65 ℃, naturally cooling standing 24h after mechanical stirring 2h, pour out supernatant liquor, then be mixed with liquid-containing binder to mixing the wilkinite that accounts for supernatant liquor total mass 1% in supernatant liquor.
3) press mass fraction, get 16 parts, urea, 12 parts of monoammonium phosphates, 7 parts of potassium sulfate mix after the liquid-containing binder stirring and dissolving that adds 27 parts after pulverizing stand-by.Get 38 parts of fermentation maturity fertilizers again and be placed in granulating disc granulation, disk adds the above-mentioned liquid-containing binder that contains urea, monoammonium phosphate, potassium sulfate in rotating.After granulating and forming, granule materials is sent into roller drying machine and carry out drying and processing.Bake out temperature is 200-250 ℃, granule materials moisture≤2.5% of oven dry, and screening makes the granular fertilizer of 2～4.75mm.
Embodiment bis-: a kind of preparation method of slow release type Chemical Mixed Fertilizer, is characterized in that: the method comprises the steps:
1) according to the mass fraction, by 60 parts of the furfural dregs of pulverizing, 22 parts of dregs of beans, 16 parts of feces of livestock and poultry be raw material, and 2 parts of EM microbial inoculums mix, and adjusting moisture to 60%, piles to fermenter and carries out aerobic fermentation.In the time that rising to more than 55 ℃, heap temperature starts turning, once every turning in 7 days later.After turning for the third time 5 days, material is shifted out to fermenter, airing makes moisture content to 30%, for subsequent use.
2) preparation of liquid-containing binder.After being weighed by the mass ratio of 1:8, the furfural dregs having fermented and tap water add potassium hydroxide, the massfraction that makes potassium hydroxide in solution is 3.0%, keep bath temperature at 75 ℃, naturally cooling standing 24h after mechanical stirring 2.5h, pour out supernatant liquor, then be mixed with liquid-containing binder to mixing the diatomite that accounts for supernatant liquor total mass 2% in supernatant liquor.
3) press mass fraction, get 13 parts, urea, 10 parts of monoammonium phosphates, 8 parts of potassium sulfate mix after the liquid-containing binder stirring and dissolving that adds 21 parts after pulverizing stand-by.Get 48 parts of fermentation maturity fertilizers again and be placed in granulating disc granulation, disk adds the above-mentioned liquid-containing binder that contains urea, monoammonium phosphate, potassium sulfate in rotating.After granulating and forming, granule materials is sent into roller drying machine and carry out drying and processing.Bake out temperature is 200-250 ℃, granule materials moisture≤2.5% of oven dry, and screening makes the granular fertilizer of 2～4.75mm.
Embodiment tri-: a kind of preparation method of slow release type Chemical Mixed Fertilizer, is characterized in that: the method comprises the steps:
1) according to the mass fraction, by 48 parts of the furfural dregs of pulverizing, 30 parts of dregs of beans, 20 parts of feces of livestock and poultry be raw material, and 2 parts of EM microbial inoculums mix, and adjusting moisture to 58%, piles to fermenter and carries out aerobic fermentation.In the time that rising to more than 55 ℃, heap temperature starts turning, once every turning in 7 days later.After turning for the third time 5 days, material is shifted out to fermenter, airing makes moisture content to 27%, for subsequent use.
2) preparation of liquid-containing binder.After being weighed by the mass ratio of 1:10, the furfural dregs having fermented and tap water add potassium hydroxide, the massfraction that makes potassium hydroxide in solution is 3.5%, keep bath temperature at 80 ℃, naturally cooling standing 24h after mechanical stirring 3h, pour out supernatant liquor, then be mixed with liquid-containing binder to mixing the wilkinite that accounts for supernatant liquor total mass 3% in supernatant liquor.
3) press mass fraction, get 15 parts, urea, 9 parts of monoammonium phosphates, 6 parts of potassium sulfate mix after the liquid-containing binder stirring and dissolving that adds 25 parts after pulverizing stand-by.Get 45 parts of fermentation maturity fertilizers again and be placed in granulating disc granulation, disk adds the above-mentioned liquid-containing binder that contains urea, monoammonium phosphate, potassium sulfate in rotating.After granulating and forming, granule materials is sent into roller drying machine and carry out drying and processing.Bake out temperature is 200-250 ℃, granule materials moisture≤2.5% of oven dry, and screening makes the granular fertilizer of 2～4.75mm.
Claims (5)
1. the preparation method of a slow release type Chemical Mixed Fertilizer, it is characterized in that: the method comprises the steps: take a kind of liquid preparation as binding agent, decomposed manure, the blend granulations such as urea, monoammonium phosphate, potassium sulfate form, the mass fraction of its raw material is: 38～48 parts of decomposed manures, 21～27 parts of liquid-containing binders, 13～17 parts, urea, 9～13 parts of monoammonium phosphates, 6～8 parts of potassium sulfate.
2. the preparation method of a kind of slow release type Chemical Mixed Fertilizer as claimed in claim 1, , it is characterized in that: the preparation method of described decomposed manure is: according to the mass fraction, by 40～60 parts of the furfural dregs of pulverizing, 20～35 parts of dregs of beans, 15～25 parts of feces of livestock and poultry, 1～2 part of EM microbial inoculum mixes, regulate moisture to 55%～60%, pile to fermenter and carry out aerobic fermentation, in the time that rising to more than 55 ℃, heap temperature starts turning, once every turning in 7 days later, after turning for the third time 3～5 days, material is shifted out to fermenter, airing makes moisture content to 25%～30%, for subsequent use.
3. the preparation method of a kind of slow release type Chemical Mixed Fertilizer as claimed in claim 1 or 2, it is characterized in that: the preparation method of described liquid-containing binder adds potassium hydroxide after the furfural dregs having fermented and tap water are weighed by the mass ratio of 1:7～1:10, the massfraction that makes potassium hydroxide in solution is 2.5%～3.5%, keep bath temperature at 60～80 ℃, naturally cooling standing 24h after mechanical stirring 2～3h, pour out supernatant liquor, then to mix in supernatant liquor account for wilkinite or the diatomite of supernatant liquor total mass 1～3% can obtaining liq binding agent.
4. the preparation method of a kind of slow release type Chemical Mixed Fertilizer as claimed in claim 1, it is characterized in that: described granulation process is by mass fraction, get 13～17 parts, urea, 9～13 parts of monoammonium phosphates, 6～8 parts of potassium sulfate mix after the liquid-containing binder stirring and dissolving that adds above-mentioned 21～27 parts after pulverizing stand-by, get again 38～48 parts of above-mentioned fermentation maturity fertilizers and be placed in granulating disc granulation, disk adds the above-mentioned urea that contains in rotating, monoammonium phosphate, the liquid-containing binder of potassium sulfate, after granulating and forming, granule materials is sent into roller drying machine and carry out drying and processing, bake out temperature is 200-250 ℃, granule materials moisture≤2.5% of drying, screening makes the granular fertilizer of 2～4.75mm.
5. the preparation method of a kind of slow release type Chemical Mixed Fertilizer as claimed in claim 1,, it is characterized in that: described feces of livestock and poultry be in chicken, pig, ox and sheep ight soil any one, any two kinds, the mixture of any three kinds or four kinds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410112814.4A CN103880535B (en) | 2014-03-25 | 2014-03-25 | A kind of preparation method of spacetabs type Chemical Mixed Fertilizer |
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| CN201410112814.4A CN103880535B (en) | 2014-03-25 | 2014-03-25 | A kind of preparation method of spacetabs type Chemical Mixed Fertilizer |
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| CN103880535A true CN103880535A (en) | 2014-06-25 |
| CN103880535B CN103880535B (en) | 2016-08-17 |
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| CN104529628A (en) * | 2014-12-18 | 2015-04-22 | 甘肃新明生物科技有限公司 | Organic bone meal fertilizer and preparation method thereof |
| CN104529655A (en) * | 2015-01-08 | 2015-04-22 | 安徽亚环生物科技有限公司 | Method for preparing fertilizer for flowers and plants on basis of feces of livestock and poultry |
| CN104725084A (en) * | 2015-01-08 | 2015-06-24 | 安徽亚环生物科技有限公司 | Preparation method of compound fertilizer based on animal dung |
| CN104987193A (en) * | 2015-06-17 | 2015-10-21 | 明光市数智肥业有限公司 | Green and environment friendly slow-release fertilizer synergist used for corn and preparation method thereof |
| CN105000968A (en) * | 2015-06-29 | 2015-10-28 | 安徽新天地生物肥业有限公司 | Special biochar slow release base fertilizer for potatoes and preparation method thereof |
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| CN107129349A (en) * | 2017-04-19 | 2017-09-05 | 明光市农源农作物专业合作社 | One kind load carbon-based magnetic biological fertilizer of ferroso-ferric oxide biomass and preparation method thereof |
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| CN111704511A (en) * | 2020-06-22 | 2020-09-25 | 济源众德生物工程有限公司 | Preparation method of organic-inorganic compound fertilizer |
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| CN118878364A (en) * | 2024-07-10 | 2024-11-01 | 西藏华丰农业发展有限公司 | Nano organic fertilizer based on nano silicate carrier material and preparation method and application thereof |
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