CN116686609A - Agricultural nano mulch film and its manufacturing method - Google Patents

Abstract

The present invention relates to an agricultural nanometer mulch film and a manufacturing method thereof. The mulch film is uniformly dispersed with nanometerized fertilizer and nano plant fiber or/and plant nano carbon fiber or/and nano bamboo carbon. The average diameter is below 45 microns; the material is derived from lipid-forming materials with degradative effects, mixed with nano-scale dry fertilizer dry particles and plant dry particles, and coated with heat to form internal upper and lower layers, which are evenly distributed The mulch film with nano-fertilizer or/and nano-planted fiber, when used in agriculture, gradually releases the contained planting nutrients to the soil from the shady side of the ground to the top according to the degradable layer. The present invention provides that during the agricultural process, the nutrients required for planting can be sequentially and/or transformed according to the time course of the degradation levels, and the photosynthetic growth of weeds can be avoided.

Description

Agricultural nano mulching film and its manufacturing method

technical field

The invention relates to an agricultural nano-mulch film and a manufacturing method thereof.

Background technique

In order to avoid overgrown weeds in agricultural planting, the surface of the field is covered with mulch film to avoid the planting position. The function of the mulch film is not only to prevent overgrown weeds, but also to maintain soil moisture and prevent the growth of insects.

The traditionally used mulch is blown by polymer plastic material and then cut into film. Since the material is a plasticized polymer, it will cause plastic pollution to the soil after use. The new mulch is made of degradable materials. , can greatly improve the plasticization pollution of the soil, and add plant crushed materials, which are expected to be released during the degradation process of the plastic film and transformed into nutrients needed for planting. The particle size of the crushed materials is obviously large and visible to the naked eye. The thickness of the film is thin, so the particle size is larger after the ratio of the particle size to the thickness of the mulch film. Sand holes or plant fiber deflocculation will be formed on the surface of the mulch film. The formed defects cause tension weakness and greatly affect the mulch film. The tensile strength is high, and after the plant fibers are released, they must be eroded by bacteria to decompose and transform nutrients.

Regarding the production of conventional mulch, air pressure blowing is adopted, and the hot-melt substrate is expanded by air pressure to become thinner, and then cut into a film like a plastic bag. Because the thickness of the plant debris is relatively large compared to the thickness of the mulch particle size, and the size is about one-tenth of the thickness of the upper film, because the plant fiber body does not have the ability to spread the flow, and the contact surface with the hot-melt substrate will be peeled off due to the difference in deformation rate. Make the film surface perforate, even if the ratio is not enough to cause perforation, but on the surface of the film, the structure of the main body of the fiber will be exposed, and it will be deflocculated when the external force intervenes in the operation of winding or laying the floor. In the case of deflocculation, the fibers protruding from the membrane surface will also cause the membrane surface to be rough.

In addition, due to the small ratio of the fiber thickness to the film thickness, the volume space occupied on the film surface is large, and the structure defect of the film layer is formed on the surface or inside of the film layer, which obviously causes the link between the substrate molecules.

The production of the mulch film is made of hot calendering and hot film forming. Among them, the hot film is used to make thin thickness. As shown in 1, hot rolling is carried out by the rolling wheel R with clamping to reform the molecular bond and make the size thinner. During the rolling process, there is air in the plant fragments 21 contained in the plastic film 800 in the hot film state. , the air will flow out after being rolled by the rolling wheel R, and through the pressure balance and damping factors, the normally extruded air bubbles 22 will be transferred to the surface of the plastic film 800, and then formed on the section of the plastic film 800 to which the air bubbles 22 belong The defect of meat thickness produces tension weakness, which is not conducive to tensile strength and loses tension strength.

As shown in FIG. 2 , since the plant crumbs 21 are generally located on the surface of the mulch 800 no matter whether they are made by blowing or laminating and rolling, the section of the mulch 800 occupied by the plant crumbs 21 , Also form the incomplete thickness, and the weakness of tensile strength occurs.

Please refer to Fig. 3 again, the adjacent two plant particles 21 inside the plastic film 800 occupy a large volume space due to their large particle size, so the two plant particles 21 are adjacent to the interval and are located at the horizontal section of the plastic film 800. The aggregation defect of the mulch film 800 produces a tensile weakness, and if the plant crumbs 21 are in large quantities, they will be blown apart due to the existence of the above-mentioned weak points during the blowing process. After the 800 degrades and touches the soil, it still needs to wait for the transformation time to obtain the required nourishing elements, but this time course may be delayed beyond the harvesting period of planting maturity.

Contents of the invention

The purpose of the present invention is to provide an agricultural nano-mulch film and its manufacturing method, which can gradually explain or/and transform the nutrients required for planting in order to provide agricultural processes according to the time-separation of degradation levels, and can avoid Photosynthetic growth of weeds.

The present invention is achieved in this way, a method for manufacturing agricultural nano-films, characterized in that it includes: a preparation stage, which further includes: (1) take dry fertilizer particles, through a dry nano-catalyzed operation After nano-fertilizers are converted into nano-fertilizers, a stockpile is carried out; (2) dry plant particles are taken as materials, and after a dry-type nano-catalysis operation, nano-planting is carried out after nano-planting; (3) materials are collected from degraded materials , carry out the first hoarding; the first granulation stage, the above-mentioned nano-fertilizers, nano-fibers, and degradable materials are assembled and performed in a mixing operation after the respective deployment operations and deployment ratios, and then a hot-melt extrusion operation is performed to make strips Extrusion performs pelletizing operation to produce master batches; in the first film forming stage, the above master batches are taken and subjected to a hot-melt extrusion operation, and a coating operation is performed at the end, and a film rolling and cooling and shaping operation are performed to form.

The volume ratio of the material is as follows: 50-75% of the degradable material; 3-8% of the dry grain of the fertilizer; 1-8% of the dry grain of the plant.

In the mixing operation, the following fillers are mixed synchronously: 0.1-3% of nano-calcium oxide; 15-25% of talcum powder.

In the mixing operation, the following additional improvers are mixed synchronously: 0.5-1% lubricant; 0.04-1.2% dispersant; 0.5-3% chain extender.

The average particle size of the dry fertilizer granules and dry plant granules catalyzed by the dry nano-catalysis operation is below 45 microns.

The said degradable material is made of polybutylene terephthalate (PBAT).

The dry granules of the fertilizer are made of potassium phosphate.

Said dry plant particles are obtained from plant stems with silicon dioxide.

In the preparation stage, plant carbon granules are additionally mixed, and the stockpiling is completed through dry nano-catalysis operation, and the proportion of dispensing is 3-20%.

In the preparation stage or the mixing operation procedure, the nano-bamboo carbon is additionally mixed, and the mixing ratio is 2-20%.

The dry nano-catalysis operation is to use a pressure cylinder to provide processing materials in and out, and use the dry high-speed fluid generated during the process to generate high-speed momentum to perform nano-scale dry catalysis on the processing materials.

An agricultural nanometer mulching film, which is a mulching film made by any one of the methods described above.

The thickness of the said plastic film is 0.05-1.2mm.

The inside of the mulch film is uniformly dispersed with nano-sized nano-fertilizer and nano-planted fiber or/and plant nano-carbon fiber or/and nano-bamboo carbon, and the average particle size of each element is below 45 microns.

The agricultural nano-mulch film and its manufacturing method of the present invention are to provide a film and film that can gradually explain or/and transform the nutrients required for planting in accordance with the time course of degradation levels in the agricultural process, and can avoid the photosynthetic growth of weeds. Its manufacturing method, in the first preparation stage A, the dry fertilizer granules and the dry plant granules are subjected to dry pneumatic catalysis to make the particle size nanometer, and the degradable materials prepared are mixed uniformly through a granulation stage, and then After a hot-melt extrusion process to produce the masterbatch, the above-mentioned masterbatch is used to form a mulch film in a film-forming stage. When the mulch film is used in agriculture, it has a gradual release of nutrients.

According to the present invention, the ratio of the materials used for the above-mentioned dry fertilizer granules is 3-8%, the ratio used for the dried plant particles is 1-8%, and the ratio used for the degraded materials is 50-75%, and the fillers are mixed with the fillers. There are talcum powder, nano-calcium oxide, and a large amount of nano-carbon black.

In the present invention, during the mixing operation, a dispersant such as a lubricant, a dispersant or a chain extender may be added.

In the present invention, the homogeneity of the particle diameters of the above-mentioned materials is below 45 microns.

In the present invention, more than 2% of the nano-bamboo carbon is filled in the nano-planted fiber prepared in the preparation stage, and the particle size of the bamboo carbon is below 45 microns.

In the present invention, the degradable material is polybutylene terephthalate (PBAT), the fertilizer dry particles are potassium phosphate, and the plant dry particles are silicon dioxide dry plants such as rice.

In the present invention, in the preparation stage, nano-sized carbon black is additionally prepared, and after being formed in the granulation stage and the film-forming stage, it has a photoresist effect and prevents the photosynthetic growth of weeds in the film-covered area.

The present invention is the dry-type nano-catalysis operation, which uses high-energy fluid and high-speed blades to generate high-speed stirring energy inside a pressure cylinder to perform dry-type nanometerization of processed objects.

Description of drawings

Figure 1 is a schematic diagram of the structure of a conventional plastic film.

Figure 2 is one of the structural schematic diagrams of conventional mulch films.

Fig. 3 is the second structural schematic diagram of conventional mulch film.

Fig. 4 is a schematic diagram of the production process of the present invention.

Fig. 5 is a schematic diagram of the coating operation system of the present invention.

Fig. 6 is one of the schematic diagrams of the production process of the present invention.

Fig. 7 is a schematic diagram of the agricultural process of plastic film according to the present invention.

Symbol Description:

Fertilizer Dry Granules 10 Dry Nano Catalytic Operation 11 Hoarding 12

Deployment Operation 13 Nano Fertilizer 100 First Degradation Level 101

Second degradation level 102 Third degradation level 103 Fourth degradation level 104

Dried plant grains 20 Plant crumbs 21 Air bubbles 22

Nano-planted fiber 200 Degradable material 30 Degradable material 300

Vegetable Carbon Granules 40 Nano Carbon Fibers 400 Mixing Operations 50

Hot melt extrusion operation60 Cooling61 Pelletizing operation62

Masterbatch 600 Hot-melt extrusion operation 70 Feeding machine head 71

Laminating operation 80 Cooling and shaping operation 81 Laminating head 82

Transfer unit 83 Film rolling device 84 Adjustment unit 85

Cooling device 86 Retracting device 87 Mulching film 800

Planting soil 90 Preparation stage A Granulation stage B

Film-forming stage C Roller R Nano Bamboo Carbon 201

Detailed ways

The agricultural nano-mulch film and its manufacturing method provided by the present invention can gradually explain or/and transform the nutrients required for planting in the process of agricultural use according to the time course of degradation levels, and can avoid the photosynthetic growth of weeds The mulch film and its manufacturing method, the mulch film production method of the present invention is as shown in Figure 4, mainly divided into a preparation stage A, a granulation stage B, and a film-forming stage C, wherein the preparation stage A is equipped with dry fertilizer granules 10, Dry plant granules 20 and degradable material 30, degradable material 30 is made from PBAT for stockpiling 12, wherein the dry fertilizer granules 10 are dry materials, and the dry plant granules 20 are crushed granules of dry plant materials, which are respectively passed through the dry filter. Rice catalysis operation 11 catalyzes the particle size to nanoscale, and forms nano-fertilizer 100 and nano-fiber planting 200 respectively. The dry-type nano-catalysis operation 11 is operated by high-speed impact of gas. After completion, each Execution of stockpiling 12, the degree of nanonization of the above-mentioned elements is below 45 microns.

The granulation stage B is to distribute the dry nano-fertilizer 100, nano-fiber planting 200, and degradable material 30 completed in the above-mentioned stages in proportion through the deployment operation 13, and collectively carry out the mixing operation after obtaining the allocation amount from the storage 12 position 50, wherein the volume ratio of the degradable material 30 is 50-75%, the nano-plant fiber 200 is 1-8%, and the nano-fertilizer 100 is 3-8%. After the mixing operation 50 is fully mixed, a Hot-melt extrusion operation 60, hot-melt extrusion operation 60 can utilize twin-pipe screw extrusion equipment to extrude the above-mentioned mixture into strips, and the strips are cooled 61 and then shaped into pellets to perform pelletizing operation 62 to Masterbatch 600 is produced.

In a film forming stage C, the above-mentioned completed masterbatch 600 is obtained, and after a hot-melt extrusion operation 70, a coating operation 80 is performed. After the coating operation 80 undergoes a cooling and shaping operation 81, a plastic film 800 is formed.

In the mixing operation 50 program of the above-mentioned granulation stage B, the powdered nano-bamboo carbon 201 completed by the dry catalytic operation can be added again, and the ratio of the material taken is 2-20%, and the mixing operation 50 and Completed the co-structured masterbatch 600.

The nano-bamboo carbon 201 is mixed in the pre-operation of the masterbatch 600 as described above and added in the mixing operation process, and it can also be completed in the procedure of the preparation stage A in the same way as the nano-fertilizer 100. Rice Bamboo Carbon 201 is not chemically active, and it can also be dry-mixed into the nano-fertilizer 100 or nano-plant fiber 200 that has been stockpiled 12 in advance according to the proportion.

The above-mentioned complete masterbatch 600 is taken to form a film. In the present invention, since the mixed product is nano-sized, in addition to better spreading ability during the molding process, it can also provide a thinner film 800 (in the Degradable material 30 within the permissible tension range of the material after film formation), and in order to make the molecular bonds between the materials more tightly during the shaping process to increase the tensile strength, so it is suitable for production by lamination and rolling The mulch film 800, wherein the hot-melt extrusion operation 70 and the laminating operation 80 constitute a film-forming equipment, and the related equipment performs the film-forming process as follows.

As shown in Figure 5, after the hot-melt extrusion operation 70 obtains the above-mentioned masterbatch 600 through hot-melt, pressure is generated by a feeding head 71, and a coating operation 80 is performed. The coating operation 80 is to use a coating head 82 forms a bare strip-shaped mulch film 800 rough embryo, which is transferred to a film rolling device 84 through a transfer unit 83. The film rolling device 84 uses a rolling method to adjust the interaction between the rollers R by an adjustment unit 85. For the gap, the thickness of the film 800 in the process is pre-determined, and then it is sealed by a cooling and setting operation 81. The cooling and setting operation 81 can use the cooling device 86 to balance the temperature or blow the thermal mass to form a heat treatment operation of temperature drop. , so that the molecular structure of the passing mulching film 800 is more stable, and finally a retracting device 87 executes the rolling, that is, forming the complete mulching film 800 for the purpose of the present invention, and its forming thickness is between 0.05-1.2 mm.

Please refer to Fig. 6 again, in the flow process of the preparation method of the present invention, plant carbon black can be added and mixed, and the applied material is plant carbon granules 40, and the dry nano-catalysis operation 11 through dry fluid catalysis is also performed. The ratio of taking it into nano carbon fiber 400 is 3 to 20%, and its size is the same as or close to nano fertilizer 100 and nano plant fiber 200. After completion, it enters a stockpile 12 and is in the granulation stage B operation process After blending about 3 to 8% with the nano-fertilizer 100, the nano-fiber planting 200 and the degradable material 30 as shown in Figure 4, after the subordinate deployment operation 13, they collectively enter the mixing operation 50 to reach the granulation stage B, and the obtained masterbatch 600 is as shown in the operation of the film-forming stage C in Figure 4, performing hot-melt extrusion operation 70 and film coating operation 80, forming a plastic film 800 mixed with 40 nanometers of plant carbon particles, and the plant carbon particles 40 nanometers It is carbon nanofiber 400, and the material ratio is 3-20%, and a large amount is evenly dispersed inside the generated mulch film 800 to produce anti-refraction function. The carbon nanofiber 400 can block the refraction of sunlight, making it difficult for weed seedlings to cover the soil on the bottom surface. Carry out photosynthesis, which can inhibit the growth of weeds, and because the color is black, it can act as a light absorbing agent to assist in absorbing solar heat, so that it will be warmed and kept warm under the mulch film to facilitate plant growth, especially in winter Or use in cold areas.

The main purpose of the aforementioned carbon nanofibers 400 filled with a large proportion is to block sunlight to suppress the growth of weeds on the covered ground. The premise is that the proportion of the nano-bamboo carbon 201 supplemented in Figure 4 is high. , the use of nano-bamboo carbon 201 as carbon black can block sunlight and refraction, and the proportion of nano-carbon fiber 400 can be adjusted.

Please refer to FIG. 7 again. When the mulch film 800 completed by the present invention is used in agriculture, the shade covers the surface that touches the plant soil 90, and the degradable material 300 contained in the mulch film 800 is entered by the bacteria contained in the plant soil 90. Erosion, tissue differentiation and degradation into water and carbon dioxide.

The progressive erosion is defined as the first degradation level 101 , the second degradation level 102 , the third degradation level 103 , and the fourth degradation level 104 .

The nature of the film 800 is degraded by the original material 300 containing a large number of dispersed nano fiber 200 and nano fertilizer 100, the nano fiber 200 and nano fertilizer 100 are based on the thickness of the film 800, following the first degradation of the degradation level The layer 101, the second degradation layer 102, the third degradation layer 103, the fourth degradation layer 104... were dissolved in sequence. At first, the nano-fertilizer 100 contained in the first degradation layer 101 was dissolved according to the degradation process. Released to the soil, the nano-fertilizer 100 and the nano-fiber 200 inside the plastic film 800 above the second degradation level 102 are still in place, and enter after the first degradation level 101 is degraded and eliminated according to the first period of time. The second degradation level 102, the nano-fertilizer 100 and the nano-plant fiber 200 contained in the second degradation level 102 are also explained and released to the soil, followed by the third degradation level 103 and the fourth degradation level 104..., The nano-fertilizer 100 and nano-plant fiber 200 contained in each level are released to the plant soil 90 one by one according to the time course of division, for absorption by the roots of the plant, or converted into nutrients to supply the growth needs of the plant. Invented mulch film 800, in the process of providing agricultural use, will gradually diverge nano-fertilizer 100 and nano-plant fiber 200 layer by layer according to the degradation level and time course, and provide mulch film 800 in the process of agricultural planting. For the plant soil 90, there is no need to additionally apply the fertilizer of the present invention, and the nano-plant fiber 200 contained in each layer inside will also infiltrate into the plant soil 90 in sequence, and be converted into plant nutrients by chemical combination Specifically, it can be seen that the mulch film 800 of the present invention will release fertilizers and nutrients intermittently according to the time course of agricultural planting and the time relationship of hierarchical degradation, and it is necessary to apply fertilizers within the time course of planting growth to harvest. There is quite positive help, and the nano-fertilizer 100, nano-fiber 200 or/and nano-carbon fiber 400 are nano-sized into fine particles, which penetrate into the soil and are easy to be compatible with the components of the soil and Rapid transformation, easy to be absorbed by plant roots, and driven by water or water vapor, it can easily spread in the soil, and will not cause previous defects on the surface of the mulch 800, affecting the mechanical tension of the mulch 800 .

Relevant degradable materials mainly use polybutylene terephthalate (PBAT). PBAT is a biodegradable thermoplastic compound. The flexibility and tensile properties of PBAT can be improved by adding auxiliary agents. PBAT is especially open under aerobic conditions. Fields, with sufficient sunlight, water vapor and microorganisms, are conducive to comprehensive degradation or composting with bio-mass, and are suitable for the implementation of agricultural mulch.

Among them, the dry fertilizer granules 10 can be taken from plants with silicon dioxide, such as rice and rice straw. Under the microscopic nature of silicon dioxide, there is a nano-fluffy microstructure, which can be used for acupuncture or poking damage to the surface of insects. Stimulate to obtain inhibitory insect repellent effect.

In the icon of Fig. 4 or Fig. 6, the program is in the mixing operation 50, and the filler is added. According to the requirement of strength, coating operation environment and equipment conditions, improver can be added, the improver is 0.5-1% of lubricant, 0.04-1.2% of dispersant, 0.5-3% of chain extender.

In the program of the preparation stage A, complete dry nano-bamboo carbon is included, and a mixing operation 50 is provided for orderly mixing, the proportion is 2-20%, and the particle size is below 45 microns.

In addition to providing a film with new functions, the present invention also utilizes the material state of the material during production, and cooperates with dry nanometerization operations to achieve rapid material preparation and film formation, and greatly reduce the flow resistance of hot-melt materials. The dry-type nano-processing is a nano-scale processing equipment system based on dry processing. In order to use the physical action of high-speed fluid and the operation of mechanical momentum, the particle size can be divided into granular substances that can be seen with high kinetic energy. Treated to the nanoscale. The system is equipped with a working axis of rotation, and a drive shaft is set according to the axis of rotation. The drive shaft drives a drainage shaft to the inside of a pressure generating unit. One end of the drainage shaft is provided with a suction port to receive the particulate matter to be processed. , the processed material is transferred into the working area of the booster impeller through the drainage shaft tube, and the drainage shaft tube radially drives a booster impeller, which runs in a rigid pressure cylinder as a whole. There is an exit.

Specifically, the system uses the power unit to drive the pressure generating unit. The pressure generating unit is equipped with a round cabin-shaped pressure cylinder according to the axis of rotation of the system. The circumference of the pressure cylinder is connected to the outside with a release port, and the inside is provided with a center line. The drainage shaft tube overlaps with the center line of the rotation axis. The drainage shaft tube is radially combined with a booster impeller. The whole coaxial is located in the pressure cylinder. One end of the drainage shaft tube is provided with a suction port, and the outer circle of the suction port radially The radially opened pressure slot leads to the space of the booster impeller, and the processed object is sucked into the pressure cylinder by the suction port under the internal pressure of the pressure cylinder. The air flow is even at the critical state of sound speed, and the momentum generated by mechanical operation, combined with various physical operations, acts on the processed material particles to effectively divide the processed material (raw material) into nanometers with a visual particle size Scale, the substance has a dry texture and is organic or inorganic crumbs.

In the preparation stage of the present invention, dry fertilizer particles and plant dry particles are subjected to dry-type nanonization treatment, and plant carbon particles are added, so that the overall formed plastic film has the special function of absorbing heat, blocking light, and gradually releasing fertilizer elements. , the tension of the mulch can be precisely maintained, and it can be spread as far as possible when laying, which is an innovative mulch production process.

Claims (14)

1. A method for manufacturing agricultural nano mulching film, which is characterized in that the method comprises the following steps:

a conditioning phase, the conditioning phase further comprising:

(1) The dry fertilizer particles are obtained and then are converted into nano fertilizer through a dry nano catalysis operation, and then a storage bin is carried out;

(2) The dry plant particles are obtained and are nano-processed into nano-plant fibers through a dry nano-catalysis operation, and then a reservoir is formed;

(3) Taking degradation materials, and carrying out a storage bin;

a granulating step, namely respectively carrying out a mixing operation on the nano fertilizer, the nano plant fiber and the degradation material after the blending proportion of the nano fertilizer, the nano plant fiber and the degradation material are blended by the blending operation, and carrying out a granulating operation by hot melt extrusion production strip extrusion to generate master batches;

and a film forming stage, namely taking the master batch, performing hot melt extrusion operation, performing film spraying operation at the tail end, and forming through film rolling and cooling shaping operation.

2. The method for manufacturing agricultural nano mulching film according to claim 1, wherein the volume ratio of the material is: the degradation material is 50 to 75 percent; 3-8% of fertilizer dry particles; 1 to 8 percent of plant dry particles are taken.

3. The method of claim 1, wherein the mixing operation is synchronized with the following fillers: 0.1-3% of nano calcium oxide; 15-25% of talcum powder.

4. The method of manufacturing agricultural mulch film according to claim 1, wherein the mixing operation is synchronized with the following additional improving agent: 0.5 to 1 percent of lubricant; 0.04 to 1.2 percent of dispersing agent; 0.5 to 3 percent of chain extender.

5. The method of producing agricultural mulch film according to claim 1, wherein the average particle diameter of the fertilizer dry particles and the plant dry particles is 45 μm or less after the dry nano-catalytic operation.

6. The method of claim 1, wherein the degradable material is polybutyl terephthalate (PBAT).

7. The method of claim 1, wherein the fertilizer is potassium phosphate.

8. The method of claim 1, wherein the plant dry particles are selected from the group consisting of silica plants.

9. The method of claim 1, wherein the plant carbon particles are added in the preparation stage, and the dry nano-catalysis is performed to complete the accumulation, wherein the preparation ratio is 3-20%.

10. The method of producing agricultural nano-sized mulch film according to claim 1, wherein the nano-sized bamboo charcoal is additionally added in the preparation stage or the mixing procedure, the ratio of the nano-sized bamboo charcoal is 2-20%.

11. The method of claim 1, wherein the dry nano-catalytic operation is to provide the process material to and from a pressure cylinder, and the process material is subjected to nano-scale dry catalysis by using the generated dry high-velocity fluid to generate high velocity.

12. An agricultural nano mulch film, characterized by being produced by the method of any one of claims 1 to 8.

13. The agricultural mulch film according to claim 12, wherein the thickness of the mulch film is 0.05-1.2 mm.

14. The agricultural mulch film according to claim 12, wherein the mulch film is internally and uniformly dispersed with nano fertilizer and nano plant fiber or/and plant carbon fiber or/and nano bamboo carbon, and the average particle size of each element is below 45 μm.