Organic compound fertilizer improver with insecticidal, improved and slow-release functions and preparation method of organic compound fertilizer improver

Abstract

The invention discloses an organic compound fertilizer improver with insecticidal, improved and slow-release functions and a preparation method thereof, and belongs to the technical field of fertilizer preparation. The organic compound fertilizer improver is powder or granules. The organic compound fertilizer modifier powder is prepared from the following raw materials: zeolite powder, silicon-calcium powder, humic acid powder, carbonized rice hull powder, chitin powder and walnut green seedcase powder; or the organic compound fertilizer modifier granule comprises an inner core and a coating layer, and the inner core is prepared from the following raw materials: zeolite powder, silicon-calcium powder, humic acid powder, carbonized rice hull powder and chitin powder. The organic compound fertilizer improver breaks through the limitation of a traditional single-function synergist, and the zeolite powder is used as a slow-release carrier, the silicon-calcium powder is used for pH adjustment, the humic acid powder is used for chelating synergism, the chitin powder is used for disease-resistant induction, and the carbonized rice hull powder is used for physical improvement. And four-dimensional function coupling of nutrient slow release, soil improvement, disease inhibition and microbial activation is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizer preparation, and specifically relates to an organic compound fertilizer modifier with insecticidal, improvement and slow-release functions and a preparation method thereof. Background Art

[0002] Organic fertilizers contain a large amount of organic matter and have an obvious effect of improving soil fertility; chemical fertilizers can only provide inorganic nutrients for crops, and long-term application will have an adverse impact on the soil, making the soil "more and more greedy". Organic fertilizers contain various nutrients, and the nutrients contained are comprehensive and balanced; while chemical fertilizers contain a single type of nutrient, and long-term application is likely to cause nutrient imbalance in the soil and food. Organic fertilizers have a low nutrient content and require a large amount of application, while chemical fertilizers have a high nutrient content and a small application amount. Organic fertilizers have a long fertilizer efficiency period; chemical fertilizers have a short and strong fertilizer efficiency period, which is easy to cause nutrient loss and pollute the environment. Organic fertilizers come from nature and do not contain any chemically synthesized substances. Long-term application can improve the quality of agricultural products; chemical fertilizers are pure chemically synthesized substances, and improper application can reduce the quality of agricultural products. During the production and processing of organic fertilizers, as long as they are fully decomposed, the drought resistance, disease resistance and insect resistance of crops can be improved after application, and the use amount of pesticides can be reduced; long-term application of chemical fertilizers, due to reducing the immunity of plants, often requires a large amount of chemical pesticides to maintain crop growth, which is likely to cause an increase in harmful substances in food. Organic fertilizers contain a large number of beneficial microorganisms, which can promote the biological transformation process in the soil and is conducive to the continuous improvement of soil fertility; long-term and large-scale application of chemical fertilizers can inhibit the activities of soil microorganisms and lead to a decline in the self-regulating ability of the soil.

[0003] At present, the composting period of organic fertilizers is long and the soil salinization index is high. Therefore, how to provide an organic compound fertilizer modifier with insecticidal, improvement and slow-release functions that can shorten the composting period and reduce the soil salinization index and its preparation method are urgent problems to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides an organic compound fertilizer modifier with insecticidal, improvement and slow-release functions and a preparation method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An organic compound fertilizer modifier with insecticidal, improvement and slow-release functions, and the above organic compound fertilizer modifier is an organic compound fertilizer modifier powder or an organic compound fertilizer modifier granule;

[0007] The above organic compound fertilizer modifier powder is made from the following raw materials in mass percentages:

[0008] 30%-40% zeolite powder, 15%-25% calcium silicate powder, 20%-30% humic acid powder, 10%-20% carbonized rice husk powder, 3%-8% chitosan powder, 3%-8% walnut green peel powder, wherein the juglone content in the walnut green peel powder ≥ 0.8%;

[0009] Or, the above-mentioned organic compound fertilizer conditioner granule comprises a core and a coating layer. The above-mentioned core is made of raw materials with the following mass percentages:

[0010] 25%-35% zeolite powder, 20%-30% calcium silicate powder, 15%-25% humic acid powder, 15%-25% carbonized rice husk powder, 3%-8% chitosan powder;

[0011] The above-mentioned coating layer comprises a composite coating formed by diatomite and shellac in a mass ratio of (2-4):1, and the thickness of the coating layer is 50-150 μm.

[0012] Advantages of the present invention:

[0013] The organic compound fertilizer conditioner of the present invention breaks through the limitations of traditional single-functional synergists. Through the synergistic effects of zeolite powder as a slow-release carrier, calcium silicate powder for pH adjustment, humic acid powder for chelation synergism, chitosan powder for disease resistance induction, and carbonized rice husk powder for physical improvement, the four-dimensional functional coupling of nutrient slow release - soil improvement - disease inhibition - microorganism activation is realized.

[0014] The organic compound fertilizer conditioner powder of the present invention is an organic compound powder with four-fold synergistic functions. Through the synergistic effects of components such as zeolite powder, calcium silicate powder, and humic acid powder in specific proportions, and in combination with walnut green peel powder, a composite system of insecticidal - soil improvement - nutrient slow release is formed. Through experimental verification, it can improve the fermentation efficiency of organic fertilizers and shorten the composting cycle by 15-20%. When applied alone, the dosage of 20-30 kg per mu can reduce the soil salinization index by 0.3-0.5.

[0015] The organic compound fertilizer conditioner granule of the present invention constructs a double-release structure with slow release on the outside and quick effect on the inside through granulation and diatomite - shellac composite coating technology. Field tests show that when blended with ordinary organic fertilizers at a ratio of 1:5, the nitrogen utilization rate can be increased by 8-12%, and the pH adjustment ability can be improved by 2.1 units. When blended with chemical fertilizers, the addition ratio ≤ 10% to avoid pH conflicts.

[0016] The present invention uses the organic compound fertilizer conditioner in combination with organic fertilizers, and the addition ratio can be flexibly adjusted by 1-5% according to soil types, which is superior to existing products with fixed formulas, such as Guoguang Chongfeng which needs to be used at a fixed concentration.

[0017] Further, the particle sizes of the above zeolite powder and calcium silicate powder are 100 - 200 mesh, the particle size of walnut green peel powder is 200 - 300 mesh, the particle size of humic acid powder is 100 - 200 mesh, the particle size of carbonized rice husk powder is 100 mesh, and the particle size of chitosan powder is 100 - 200 mesh.

[0018] Further, the particle diameter of the above organic compound fertilizer conditioner granule is 2 - 4 mm, the compressive strength is ≥15 N, and the disintegration time in water is > 30 min.

[0019] The present invention also provides a preparation method of an organic compound fertilizer conditioner with insecticidal, improving and slow - release functions. The preparation method of the above organic compound fertilizer conditioner powder includes the following steps:

[0020] (1) Weigh each raw material according to the above organic compound fertilizer conditioner with insecticidal, improving and slow - release functions;

[0021] (2) First, mix the humic acid powder and chitosan powder, then add the zeolite powder and calcium silicate powder and continue to mix. Finally, add the carbonized rice husk powder and walnut green peel powder, mix evenly, and then perform moisture - proof packaging to obtain the organic compound fertilizer conditioner powder;

[0022] Or, the preparation method of the above organic compound fertilizer conditioner granule includes the following steps:

[0023] 1) Weigh each raw material according to the above organic compound fertilizer conditioner with insecticidal, improving and slow - release functions;

[0024] 2) Wet - mix the zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitosan powder, granulate, dry, and spray a coating liquid including diatomaceous earth and shellac.

[0025] Further, in step (2), the preparation method of the above walnut green peel powder includes the following steps: Microwave - dry the walnut green peel at a power of 500 - 800 W for 3 - 8 minutes, and then perform ultrafine grinding to obtain the walnut green peel powder.

[0026] Further, in step (2), use a three - dimensional motion mixer. First, mix the humic acid powder and chitosan powder for 5 - 15 minutes, then add the zeolite powder and calcium silicate powder and continue to mix for 5 - 15 minutes. Finally, add the carbonized rice husk powder and walnut green peel powder and mix for 5 - 15 minutes. The mixing rotation speed is 8 - 15 r / min.

[0027] The beneficial effects of adopting the above further technical solutions: Adopt the dry - method ultrafine grinding + three - dimensional mixing process to solve the compatibility problem of multiple materials.

[0028] Further, in step (2), after the carbonized rice husk powder and walnut green peel powder are finally added and the mixing uniformity CV value ≤5% is achieved, perform moisture - proof packaging. The moisture permeability of the packaging material is ≤2 g / m 2 ·24 h.

[0029] Further, in step 2), zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitin powder are added to an aqueous sodium alginate solution and wet-mixed until the moisture content is 18-22%, the concentration of the aqueous sodium alginate solution is 3wt%-5wt%, and pelletizing is carried out using a disk granulator.

[0030] The beneficial effects of adopting the above further technical solution: Introducing sodium alginate in the development of the granule realizes a dual release mode of "external slow release - internal quick effect", which is more environmentally friendly than traditional binders (such as polyvinyl alcohol).

[0031] Further, in step 2), the drying is specifically gradient drying at 50-65°C. First, dry at 55°C for 1 h, and then raise the temperature to 60°C and dry for 0.5 h.

[0032] Further, in step 2), a fluidized bed coating device is used to spray the coating liquid including diatomaceous earth and shellac three times, with an interval of 10 min each time; the coating liquid also includes a solvent and nano-silica, the solvent is ethanol, the mass ratio of the solvent to shellac is (3-4):1, and nano-silica accounts for 0.5-1.5% of the mass of the coating liquid. Specific embodiments

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Example 1

[0035] A preparation method of an organic compound fertilizer improver powder with insecticidal and modified slow-release functions, comprising the following steps:

[0036] (1) Microwave-dry walnut green husk at a power of 600 W for 5 minutes, and then perform ultrafine grinding to obtain walnut green husk powder;

[0037] (2) Weigh each raw material according to the following mass percentages:

[0038] Zeolite powder 35%, calcium silicate powder 20%, humic acid powder 25%, carbonized rice husk powder 10%, chitin powder 5%, walnut green husk powder 5%, wherein the juglone content in the walnut green husk powder is 0.8%;

[0039] The particle sizes of the zeolite powder and the calcium silicate powder are 100-200 mesh, the particle size of the walnut green husk powder is 200-300 mesh, the particle size of the humic acid powder is 100-200 mesh, the particle size of the carbonized rice husk powder is 100 mesh, and the particle size of the chitin powder is 100-200 mesh.

[0040] (3) Using a three-dimensional motion mixer, at a mixing speed of 10 r / min, humic acid powder and chitosan powder were first mixed for 10 minutes, zeolite powder and calcium silicate powder were then added and mixed for another 10 minutes, and finally carbonized rice husk powder and walnut green peel powder were added and mixed for another 10 minutes. After the mixing uniformity CV value reached 5%, moisture-proof packaging was performed, and the moisture permeability of the packaging material was 2 g / m 2 · 24h. After uniformization, carry out moisture-proof packaging to obtain the organic compound fertilizer improver powder.

[0041] The test results show that the organic fertilizer fermentation efficiency is improved and the composting cycle is shortened by 18.7%. When applied alone, 25 kg per mu can reduce the soil salinization index by 0.42. The organic fertilizer is composed of the fermented product of fungus residue or straw plus livestock and poultry manure, and 40 kg is added per ton of organic fertilizer.

[0042] Example 2

[0043] The preparation method of an organic compound fertilizer improver powder with insecticide improvement and slow-release function comprises the following steps:

[0044] (1) drying the walnut green peel in a microwave at a power of 500 W for 3 minutes, and then ultrafine grinding to obtain walnut green peel powder;

[0045] (2) Weigh each raw material according to the following mass percentage:

[0046] Zeolite powder 30%, calcium silicate powder 15%, humic acid powder 30%, carbonized rice husk powder 19%, chitin powder 3%, walnut green peel powder 3%, wherein the content of juglone in the walnut green peel powder is 0.8%;

[0047] The particle size of zeolite powder and calcium silicate powder is 100-200 mesh, the particle size of walnut green peel powder is 200-300 mesh, the particle size of humic acid powder is 100-200 mesh, the particle size of carbonized rice husk powder is 100 mesh, and the particle size of chitin powder is 100-200 mesh.

[0048] (3) Using a three-dimensional motion mixer, at a mixing speed of 8 r / min, humic acid powder and chitosan powder were first mixed for 5 minutes, zeolite powder and calcium silicate powder were then added and mixed for another 5 minutes, and finally carbonized rice husk powder and walnut green peel powder were added and mixed for another 5 minutes. After the mixing uniformity CV value reached 5%, moisture-proof packaging was performed, and the moisture permeability of the packaging material was 2 g / m 2 · 24h. After uniformization, moisture-proof packaging is carried out to obtain the organic compound fertilizer improver powder.

[0049] Example 3

[0050] The preparation method of an organic compound fertilizer improver powder with insecticide-improving slow-release function comprises the following steps:

[0051] (1) Microwave dry the walnut green husk at a power of 800W for 8 minutes, and then perform ultrafine grinding to obtain walnut green husk powder;

[0052] (2) Weigh each raw material according to the following mass percentages:

[0053] Zeolite powder 40%, calcium silicate powder 15%, humic acid powder 20%, carbonized rice husk powder 10%, chitin powder 8%, walnut green husk powder 7%, among which, the juglone content in the walnut green husk powder is 0.8%;

[0054] The particle size of zeolite powder and calcium silicate powder is 100 - 200 mesh, the particle size of walnut green husk powder is 200 - 300 mesh, the particle size of humic acid powder is 100 - 200 mesh, the particle size of carbonized rice husk powder is 100 mesh, and the particle size of chitin powder is 100 - 200 mesh.

[0055] (3) Use a three - dimensional motion mixer with a mixing speed of 15r / min. First, mix the humic acid powder and chitin powder for 15 minutes, then add zeolite powder and calcium silicate powder and continue to mix for 15 minutes. Finally, add carbonized rice husk powder and walnut green husk powder and mix for 15 minutes. After the mixing uniformity CV value reaches 5%, perform moisture - proof packaging, and the moisture permeability of the packaging material is 2g / m 2 ·24h. After uniformity, perform moisture - proof packaging to obtain the organic compound fertilizer modifier powder.

[0056] Example 4

[0057] A preparation method of an organic compound fertilizer modifier granule with insecticidal, improving and slow - release functions, including the following steps:

[0058] 1) Weigh each raw material according to the following mass percentages:

[0059] Zeolite powder 30%, calcium silicate powder 25%, humic acid powder 20%, carbonized rice husk powder 20%, chitin powder 5%;

[0060] The particle size of zeolite powder and calcium silicate powder is 100 - 200 mesh, the particle size of humic acid powder is 100 - 200 mesh, the particle size of carbonized rice husk powder is 100 mesh, and the particle size of chitin powder is 100 - 200 mesh.

[0061] 2) Add zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitin powder to an aqueous sodium alginate solution and wet - mix until the water content is 20%. The concentration of the aqueous sodium alginate solution is 4wt%. Use a disk granulator for forming, first dry at 55℃ for 1h, and then raise the temperature to 60℃ and dry for 0.5h. Use a fluidized - bed coating equipment to spray the coating liquid in three times, with an interval of 10min each time; the coating liquid includes diatomite, shellac, ethanol and nano - silica, the mass ratio of ethanol to shellac is 3:1, and nano - silica accounts for 1% of the mass of the coating liquid.

[0062] The particle size of the organic compound fertilizer conditioner granule is 2 - 4 mm, the compressive strength ≥ 15 N, and the disintegration time in water > 30 min. The coating layer includes a composite coating formed by diatomaceous earth and shellac in a mass ratio of 3:1, and the thickness of the coating layer is 50 - 150 μm.

[0063] Field tests show that blending with ordinary organic fertilizer at a ratio of 1:5 can increase the nitrogen utilization rate by 10.3% and improve the pH adjustment ability by 2.1 units.

[0064] Example 5

[0065] A preparation method of an organic compound fertilizer conditioner granule with insecticidal, improving and slow - release functions, comprising the following steps:

[0066] 1) Weigh each raw material according to the following mass percentages:

[0067] Zeolite powder 25%, calcium silicate powder 24%, humic acid powder 18%, carbonized rice husk powder 25%, chitin powder 8%;

[0068] The particle size of zeolite powder and calcium silicate powder is 100 - 200 mesh, the particle size of humic acid powder is 100 - 200 mesh, the particle size of carbonized rice husk powder is 100 mesh, and the particle size of chitin powder is 100 - 200 mesh.

[0069] 2) Add zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitin powder to an aqueous sodium alginate solution and mix them wetly until the water content is 18%. The concentration of the aqueous sodium alginate solution is 3 wt%. Use a disc granulator for granulation. First, dry at 55 °C for 1 h, and then raise the temperature to 60 °C and dry for 0.5 h. Use a fluidized - bed coating equipment and spray the coating liquid three times, with an interval of 10 min each time; the coating liquid includes diatomaceous earth, shellac, ethanol and nano - silica. The mass ratio of the solvent to shellac is 3:1, and nano - silica accounts for 0.5% of the mass of the coating liquid.

[0070] The particle size of the organic compound fertilizer conditioner granule is 2 - 4 mm, the compressive strength ≥ 15 N, and the disintegration time in water > 30 min. The coating layer includes a composite coating formed by diatomaceous earth and shellac in a mass ratio of 2:1, and the thickness of the coating layer is 50 - 150 μm.

[0071] Field tests show that blending with ordinary organic fertilizer at a ratio of 1:5 can increase the nitrogen utilization rate by 8% and improve the pH adjustment ability by 2.1 units.

[0072] Example 6

[0073] A preparation method of an organic compound fertilizer conditioner granule with insecticidal, improving and slow - release functions, comprising the following steps:

[0074] 1) Weigh each raw material according to the following mass percentages:

[0075] 32% zeolite powder, 25% calcium silicate powder, 20% humic acid powder, 15% carbonized rice husk powder, 8% chitosan powder;

[0076] The particle size of zeolite powder and calcium silicate powder is 100 - 200 mesh, the particle size of humic acid powder is 100 - 200 mesh, the particle size of carbonized rice husk powder is 100 mesh, and the particle size of chitosan powder is 100 - 200 mesh.

[0077] 2) Add zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitosan powder to the sodium alginate aqueous solution and mix them wetly until the water content is 22%. The concentration of the sodium alginate aqueous solution is 5 wt%. Use a disk granulator to form pellets. First, dry at 55 °C for 1 h, then raise the temperature to 60 °C and dry for 0.5 h. Use a fluidized bed coating equipment to spray the coating liquid three times, with an interval of 10 min each time; the coating liquid includes diatomite, shellac, ethanol and nano-silica. The mass ratio of ethanol to shellac is 4:1, and nano-silica accounts for 1.5% of the mass of the coating liquid.

[0078] The particle size of the organic compound fertilizer conditioner granule is 2 - 4 mm, the compressive strength ≥ 15 N, and the disintegration time in water > 30 min. The coating layer includes a composite coating formed by diatomite and shellac in a mass ratio of 4:1, and the thickness of the coating layer is 50 - 150 μm.

[0079] Field experiments show that blending with ordinary organic fertilizer at a ratio of 1:5 can increase the nitrogen utilization rate by 12% and improve the pH adjustment ability by 2.1 units.

[0080] Comparative experiment

[0081] I. Verification basis for key innovation points

[0082] 1. Triple slow-release mechanism

[0083] Slow-release period of single zeolite: 19 ± 2 days

[0084] Slow-release period of the compound system: 28 ± 3 days (p < 0.05)

[0085] 2. Calcium silicate - chitosan synergy

[0086] Single application of calcium silicate: The disease is reduced by 23.6%

[0087] Calcium silicate + chitosan: The disease is reduced by 41.8%

[0088] II. Core parameters that need experimental verification

[0089] 1. Suggestions for formula optimization

[0090] It is recommended to carry out an L9(3 4 ) orthogonal experiment, focusing on investigating:

[0091] Zeolite powder addition amount (30 - 50%)

[0092] Binder type (sodium alginate vs polyvinyl alcohol)

[0093] Granulation temperature (50 - 70 °C)

[0094] 2. Field validation indicators

[0095] Increment of available silicon in soil (≥28 mg / kg)

[0096] Reduction rate of nematodes (target ≥40%)

[0097] Increase rate of VC content in fruits (target ≥15%)

[0098] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An organic compound fertilizer modifier with insecticidal improved slow-release function, characterized in that, The organic compound fertilizer conditioner is a powder or granule of the organic compound fertilizer conditioner; The powder of the organic compound fertilizer conditioner is made from the following raw materials by mass percentage: 30%-40% zeolite powder, 15%-25% calcium silicate powder, 20%-30% humic acid powder, 10%-20% carbonized rice husk powder, 3%-8% chitin powder, 3%-8% walnut green peel powder, wherein the juglone content in the walnut green peel powder is ≥0.8%; Or, the granule of the organic compound fertilizer conditioner includes a core and a coating layer, and the core is made from the following raw materials by mass percentage: 25%-35% zeolite powder, 20%-30% calcium silicate powder, 15%-25% humic acid powder, 15%-25% carbonized rice husk powder, 3%-8% chitin powder; The coating layer includes a composite coating formed by diatomite and shellac in a mass ratio of (2-4):1, and the thickness of the coating layer is 50-150 μm.

2. The organic compound fertilizer modifier with insecticidal and improved slow-release functions according to claim 1, characterized in that, The particle size of the zeolite powder and calcium silicate powder is 100-200 mesh, the particle size of the walnut green peel powder is 200-300 mesh, the particle size of the humic acid powder is 100-200 mesh, the particle size of the carbonized rice husk powder is 100 mesh, and the particle size of the chitin powder is 100-200 mesh.

3. An organic compound fertilizer modifier with an insecticidal improved slow-release function according to claim 1, characterized in that, The particle diameter of the granule of the organic compound fertilizer conditioner is 2-4 mm, the compressive strength is ≥15 N, and the disintegration time in water is >30 min.

4. A preparation method of an organic compound fertilizer modifier with insecticidal improved slow-release function, characterized in that, The preparation method of the powder of the organic compound fertilizer conditioner includes the following steps: (1) Weigh each raw material according to the organic compound fertilizer conditioner with insecticidal improvement and slow release functions described in any one of claims 1-3; (2) First mix the humic acid powder and chitin powder, then add the zeolite powder and calcium silicate powder and continue to mix, and finally add the carbonized rice husk powder and walnut green peel powder and mix evenly, and then carry out moisture-proof packaging to obtain the powder of the organic compound fertilizer conditioner; Or, the preparation method of the granule of the organic compound fertilizer conditioner includes the following steps: 1) Weigh each raw material according to the organic compound fertilizer conditioner with insecticidal improvement and slow release functions described in any one of claims 1-3; 2) Wet-mix the zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitin powder, granulate, dry, and spray a coating solution including diatomite and shellac.

5. The preparation method of an organic compound fertilizer conditioner with insecticidal and improved slow-release functions according to claim 4, characterized in that, In step (2), the preparation method of the walnut green peel powder includes the following steps: Microwave-dry the walnut green peel at a power of 500-800 W for 3-8 minutes, and then carry out ultrafine grinding to obtain the walnut green peel powder.

6. The preparation method of an organic compound fertilizer conditioner with insecticidal and improved slow-release functions according to claim 4, characterized in that, In step (2), use a three-dimensional motion mixer, first mix the humic acid powder and chitin powder for 5-15 minutes, then add the zeolite powder and calcium silicate powder and continue to mix for 5-15 minutes, and finally add the carbonized rice husk powder and walnut green peel powder and mix for 5-15 minutes, and the mixing speed is 8-15 r / min.

7. The preparation method of an organic compound fertilizer modifier with insecticidal improved slow-release function according to claim 4, characterized in that, In step (2), after adding carbonized rice hull powder and walnut green peel powder and mixing them until the coefficient of variation (CV) of the uniformity is ≤ 5%, moisture-proof packaging is carried out, and the moisture permeability of the packaging material is ≤ 2 g / m 2 ·24h.

8. The preparation method of an organic compound fertilizer modifier with an improved insecticidal and sustained-release function according to claim 4, characterized in that, In step 2), add the zeolite powder, calcium silicate powder, humic acid powder, carbonized rice husk powder and chitin powder to an aqueous sodium alginate solution and wet-mix until the moisture content is 18-22%, the concentration of the aqueous sodium alginate solution is 3 wt%-5 wt%, and use a disk granulator to form.

9. The preparation method of an organic compound fertilizer modifier with insecticidal and improved slow-release functions according to claim 4, characterized in that, In step 2), the drying is specifically gradient drying at 50-65 °C. First dry at 50 °C for 1 h, and then raise the temperature to 65 °C and dry for 0.5 h.

10. The preparation method of an organic compound fertilizer modifier with insecticidal and improved slow-release functions according to claim 4, characterized in that, In step 2), a fluidized bed coating device is used to spray the coating liquid containing diatomaceous earth and shellac three times, with an interval of 10 minutes each time; the coating liquid further includes a solvent and nano-silica, the solvent is ethanol, the mass ratio of the solvent to shellac is (3-4):1, and the nano-silica accounts for 0.5-1.5% of the mass of the coating liquid.