A new type of greenhouse gas emission reduction and stable fertilizer

Abstract

The present invention provides a novel greenhouse gas emission reduction stable fertilizer, and relates to the technical field of fertilizers. The raw materials of the stable fertilizer of the present invention include the following components by mass: 20-25 parts of coated inorganic fertilizers, 50-65 parts of microbial fertilizers, 1.2-1.5 parts of sulfates, 20-35 parts of anionic polyacrylamide, 40-55 parts of humic acid, 1-2 parts of threonine, and 2-3 parts of polyaspartic acid. The present invention ensures fertilizer efficiency and reduces nitrous oxide emissions by effectively stabilizing nitrogen through scientific and reasonable fertilizer component design, and also has the effect of methane gas emission reduction, which provides a direction for greenhouse gas emission reduction. The present invention also has the characteristics of simple preparation process, and has extremely high promotion and application value in the field of agriculture.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, and in particular to a novel greenhouse gas emission reduction and stabilization fertilizer. Background Art

[0002] Greenhouse gases are the main culprit for global warming. They have extremely serious adverse effects on the environment and agricultural production, and also directly affect human health.

[0003] Greenhouse gases usually refer to gases in the atmosphere that allow the sun's short-wave radiation to pass freely, while strongly absorbing long-wave radiation (infrared) emitted by the ground and air, thus having a shielding effect on the earth's surface.

[0004] Nitrous oxide in greenhouse gases mainly comes from the decomposition and volatilization of nitrogen fertilizers. Controlling the loss and volatilization of nitrogen fertilizers has become an important technical issue in greenhouse gas emission reduction and is the only way for sustainable agricultural development. However, with the gradual decline in fertility of cultivated land, farmers are applying more and more fertilizers, which has become a practical obstacle to reducing the decomposition of nitrogen fertilizers and controlling the emission reduction of greenhouse gas nitrous oxide. Therefore, how to adjust this contradiction, while ensuring the increase in fertilizer production and efficiency, to improve the utilization rate of nitrogen fertilizers, so as to achieve the reduction of greenhouse gas nitrous oxide emissions is a technical problem that needs to be solved in this field. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of greenhouse gas emission reduction stable fertilizer to solve the problems existing in the above-mentioned prior art and achieve the effect of greenhouse gas emission reduction on the basis of ensuring fertilizer efficiency.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a greenhouse gas emission reduction and stable fertilizer, the raw materials of which include the following components in parts by weight:

[0008] 20-25 parts of coated inorganic fertilizer, 50-65 parts of microbial fertilizer, 1.2-1.5 parts of sulfate, 20-35 parts of anionic polyacrylamide, 40-55 parts of humic acid, 1-2 parts of threonine, and 2-3 parts of polyaspartic acid.

[0009] The sulfate includes potassium sulfate and potassium magnesium sulfate. The molecular weight of the anionic polyacrylamide is 8-10Mg / mol.

[0010] In the present invention, the anionic polyacrylamide used is a high molecular polymer with good physical adsorption capacity and carries a negative charge. It can improve the soil structure and create conditions for the coated inorganic fertilizer and microbial fertilizer to function.

[0011] In the present invention, sulfate can cause competition between sulfate-reducing bacteria and methanogens, thereby reducing the activity of methanogens, effectively inhibiting the generation of methane gas, and achieving synchronous emission reduction of methane gas.

[0012] In the present invention, threonine and polyaspartic acid are used as organic nitrogen sources, which can be directly absorbed and utilized by crops without conversion, and can be used as nitrogen supplements required for plant growth.

[0013] Furthermore, the method for preparing the coated inorganic fertilizer comprises the following steps:

[0014] (1) Preparation of modified starch: epichlorohydrin and N,N-methylenebisacrylamide are added to a potato starch gelatinized liquid, and the mixture is stirred for reaction to obtain modified starch;

[0015] (2) Nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer are coated with modified starch to obtain the coated inorganic fertilizer.

[0016] Furthermore, the total mass of the epichlorohydrin and N,N-methylenebisacrylamide is 2%-2.5% of the potato starch gelatinized liquid; and the mass ratio of the epichlorohydrin and N,N-methylenebisacrylamide is 3.5-4:1.

[0017] Furthermore, the stirring reaction in step (1) is carried out at a temperature of 40-45° C. and for a time of 20-30 min.

[0018] Furthermore, the mass ratio of the total mass of the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer to the modified starch is 2-5:1; and the mass ratio of N, P2O5 and K2O in the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer is 10.8-11.2:13.5-14.8:13.3-14.6.

[0019] The potato starch gelatinized liquid is obtained by mixing potato starch with water of 2-4 times its mass and then gelatinizing the mixture. The gelatinization temperature is 60-70° C. and the gelatinization time is 15-20 minutes.

[0020] In the present invention, epichlorohydrin and N,N-methylenebisacrylamide are cross-linked with starch, and the obtained modified starch can achieve effective stabilization of nitrogen fertilizer, so that the nitrogen fertilizer can exert a lasting and stable fertilizer effect, improve the fertilizer utilization rate, and improve the greenhouse gas nitrous oxide emission problem caused by the loss of nitrogen fertilizer and low utilization rate.

[0021] Furthermore, the preparation method of the microbial fertilizer comprises the following steps:

[0022] (1) mixing livestock manure with edible fungus residue, inoculating methylotrophic Bacillus, fermenting, and refining the obtained fermentation product to obtain a fertilizer matrix;

[0023] (2) Inoculating green Trichoderma into the fertilizer matrix to obtain a microbial fertilizer.

[0024] The preferred mass ratio of the livestock excrement to the edible fungus residue is 1: 1. The livestock excrement is preferably cow dung, and the edible fungus residue is preferably Flammulina velutipes residue.

[0025] Furthermore, the inoculation amount of the methylotrophic Bacillus is 1%-2% of the total mass of the livestock excrement and the edible fungus residue; the inoculation amount of the green Trichoderma is 1.5%-2% of the mass of the fertilizer matrix.

[0026] Furthermore, the fermentation temperature in step (1) is 35-37°C and the fermentation time is 20-24h.

[0027] The present invention effectively improves the conversion of nitrogen fertilizer. When the amount of nitrogen fertilizer applied is relatively small, the effective stability and high conversion rate of nitrogen fertilizer are comprehensively achieved through the synergistic effect of microbial fertilizer and amino acid components, thereby ensuring fertilizer efficiency and achieving good crop growth.

[0028] The present invention further provides a method for preparing the above-mentioned greenhouse gas emission reduction and stable fertilizer, comprising the following steps: mixing the raw materials according to a mass ratio to obtain the greenhouse gas emission reduction and stable fertilizer.

[0029] The present invention discloses the following technical effects:

[0030] The present invention ensures fertilizer efficiency and reduces nitrous oxide emissions through scientific and reasonable fertilizer component design and effective nitrogen stabilization, while also having the effect of reducing methane emissions, thus providing a direction for greenhouse gas emission reduction.

[0031] The invention has the characteristics of simple preparation process and has extremely high popularization and application value in the agricultural field. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0033] It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. The intermediate value in any stated value or stated range, and each smaller range between any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0034] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0035] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0036] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0037] Example 1

[0038] A mixed greenhouse gas emission reduction and stabilization fertilizer, the raw materials of which include the following quality components:

[0039] 25 parts of coated inorganic fertilizer, 55 parts of microbial fertilizer, 1.5 parts of potassium magnesium sulfate, 30 parts of anionic polyacrylamide, 45 parts of humic acid, 1.5 parts of threonine, and 2 parts of polyaspartic acid;

[0040] The preparation method is as follows:

[0041] (1) Preparation of coated inorganic fertilizers:

[0042] a. Preparation of modified starch: Add potato starch to water in an amount twice its mass, heat to 65°C for gelatinization for 15 minutes to obtain a gelatinized solution, adjust the system temperature to 45°C, then add epichlorohydrin and N,N-methylenebisacrylamide (mass ratio 3.8:1), stir and react for 20 minutes to obtain modified starch; the total mass of epichlorohydrin and N,N-methylenebisacrylamide is 2.5% of the potato starch gelatinized solution.

[0043] b. Use modified starch to encapsulate nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and the mass ratio of the total mass of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer to the modified starch is 5:1.

[0044] In nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, the mass ratio of N, P2O5 and K2O is 11.2:13.5:13.3.

[0045] (2) Preparation of microbial fertilizer:

[0046] a. Mix cow dung and Flammulina velutipes residue in equal amounts, inoculate with 2% methylotrophic Bacillus, and ferment at 37°C for 24 hours to obtain a fermentation product;

[0047] b. The obtained fermentation product is refined to a particle size of less than 2 mm to obtain a fertilizer matrix;

[0048] c. Inoculate 2% of green Trichoderma into the fertilizer matrix to obtain microbial fertilizer.

[0049] (3) Preparation of stable fertilizer:

[0050] The coated inorganic fertilizer, microbial fertilizer, potassium magnesium sulfate, anionic polyacrylamide (molecular weight 10Mg / mol), humic acid, threonine, and polyaspartic acid are mixed and stirred to obtain a mixed fertilizer, which is a greenhouse gas emission reduction and stabilization fertilizer.

[0051] The prepared fertilizer was applied as base fertilizer in corn fields at an application rate of 450 kg / mu. The control group was treated with conventional nitrogen, phosphorus and potassium compound fertilizers. The field management was the same and no other fertilizers were applied during the experiment. The greenhouse gas emission flux was measured using the sealed static chamber method. The results showed that after 3 months, the cumulative CH4 emission in the experimental group was 7.85 mg / m 2 The cumulative N2O emission is 15.1 mg / m 2 The cumulative CH4 emission in the control group was 8.29 mg / m 2 The cumulative emission of N2O is 21.9 mg / m 2 .

[0052] Example 2

[0053] A mixed greenhouse gas emission reduction and stabilization fertilizer, the raw materials of which include the following quality components:

[0054] 23 parts of coated inorganic fertilizer, 58 parts of microbial fertilizer, 1.4 parts of potassium magnesium sulfate, 20 parts of anionic polyacrylamide, 55 parts of humic acid, 1.3 parts of threonine, and 3 parts of polyaspartic acid;

[0055] The preparation method is as follows:

[0056] (1) Preparation of coated inorganic fertilizers:

[0057] a. Preparation of modified starch: Add potato starch to water in an amount three times its mass, heat to 65°C for gelatinization for 18 minutes to obtain a gelatinized solution, adjust the system temperature to 43°C, then add epichlorohydrin and N,N-methylenebisacrylamide (mass ratio 3.5:1), stir and react for 25 minutes to obtain modified starch; the total mass of epichlorohydrin and N,N-methylenebisacrylamide is 2.2% of the potato starch gelatinized solution.

[0058] b. Use modified starch to encapsulate nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and the mass ratio of the total mass of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer to the modified starch is 4:1.

[0059] In nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, the mass ratio of N, P2O5 and K2O is 11:13:13.3.

[0060] (2) Preparation of microbial fertilizer:

[0061] a. Mix cow dung and Flammulina velutipes residue in equal amounts, inoculate 1.5% of methylotrophic Bacillus, and ferment at 35°C for 22 hours to obtain a fermentation product;

[0062] b. The obtained fermentation product is refined to a particle size of less than 2 mm to obtain a fertilizer matrix;

[0063] c. Inoculate 2% of green Trichoderma into the fertilizer matrix to obtain microbial fertilizer.

[0064] (3) Preparation of stable fertilizer:

[0065] The coated inorganic fertilizer, microbial fertilizer, potassium magnesium sulfate, anionic polyacrylamide (molecular weight 8Mg / mol), humic acid, threonine, and polyaspartic acid are mixed and stirred to obtain a mixed fertilizer, which is a greenhouse gas emission reduction and stabilization fertilizer.

[0066] The prepared fertilizer was applied as base fertilizer in corn fields at an application rate of 450 kg / mu. The control group was treated with conventional nitrogen, phosphorus and potassium compound fertilizers. The field management was the same and no other fertilizers were applied during the experiment. The greenhouse gas emission flux was measured using the sealed static chamber method. The results showed that after 3 months, the cumulative CH4 emission in the experimental group was 7.89 mg / m 2 The cumulative emission of N2O is 15.3 mg / m 2 The cumulative CH4 emission in the control group was 8.29 mg / m 2 The cumulative emission of N2O is 21.9 mg / m 2 .

[0067] Example 3

[0068] A mixed greenhouse gas emission reduction and stabilization fertilizer, the raw materials of which include the following quality components:

[0069] 23 parts of coated inorganic fertilizer, 60 parts of microbial fertilizer, 1.4 parts of potassium sulfate, 30 parts of anionic polyacrylamide, 40 parts of humic acid, 1.2 parts of threonine, and 2.8 parts of polyaspartic acid;

[0070] The preparation method is as follows:

[0071] (1) Preparation of coated inorganic fertilizers:

[0072] a. Preparation of modified starch: Add potato starch to water in an amount three times its mass, heat to 65°C for gelatinization for 15 minutes to obtain a gelatinized solution, adjust the system temperature to 45°C, then add epichlorohydrin and N,N-methylenebisacrylamide (mass ratio 3.8:1), stir and react for 25 minutes to obtain modified starch; the total mass of epichlorohydrin and N,N-methylenebisacrylamide is 2% of the potato starch gelatinized solution.

[0073] b. Use modified starch to encapsulate nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and the mass ratio of the total mass of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer to the modified starch is 5:1.

[0074] In nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, the mass ratio of N, P2O5 and K2O is 11.0:13.5:14.2.

[0075] (2) Preparation of microbial fertilizer:

[0076] a. Mix cow dung and Flammulina velutipes residue in equal amounts, inoculate 1.5% of methylotrophic Bacillus, and ferment at 37°C for 20 hours to obtain a fermentation product;

[0077] b. The obtained fermentation product is refined to a particle size of less than 2 mm to obtain a fertilizer matrix;

[0078] c. Inoculate 2% of green Trichoderma into the fertilizer matrix to obtain microbial fertilizer.

[0079] (3) Preparation of stable fertilizer:

[0080] The coated inorganic fertilizer, microbial fertilizer, potassium sulfate, anionic polyacrylamide (molecular weight 9 Mg / mol), humic acid, threonine, and polyaspartic acid are mixed and stirred to obtain a mixed fertilizer, which is a greenhouse gas emission reduction and stabilization fertilizer.

[0081] The prepared fertilizer was applied as base fertilizer in corn fields at an application rate of 450 kg / mu. The control group was treated with conventional nitrogen, phosphorus and potassium compound fertilizers. The field management was the same and no other fertilizers were applied during the experiment. The greenhouse gas emission flux was measured using the sealed static chamber method. The results showed that after 3 months, the cumulative CH4 emission in the experimental group was 7.88 mg / m 2 The cumulative emission of N2O is 15.6 mg / m 2 The cumulative CH4 emission in the control group was 8.29 mg / m 2 The cumulative emission of N2O is 21.9 mg / m 2 .

[0082] Example 4

[0083] A mixed greenhouse gas emission reduction and stabilization fertilizer, the raw materials of which include the following quality components:

[0084] 22 parts of coated inorganic fertilizer, 55 parts of microbial fertilizer, 1.2 parts of potassium magnesium sulfate, 25 parts of anionic polyacrylamide, 55 parts of humic acid, 1.8 parts of threonine, and 2 parts of polyaspartic acid;

[0085] The preparation method is as follows:

[0086] (1) Preparation of coated inorganic fertilizers:

[0087] a. Preparation of modified starch: Add potato starch to water in an amount twice its mass, heat to 70°C for gelatinization for 15 minutes to obtain a gelatinized solution, adjust the system temperature to 43°C, then add epichlorohydrin and N,N-methylenebisacrylamide (mass ratio 3.8:1), stir and react for 20 minutes to obtain modified starch; the total mass of epichlorohydrin and N,N-methylenebisacrylamide is 2% of the potato starch gelatinized solution.

[0088] b. Use modified starch to encapsulate nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and the mass ratio of the total mass of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer to the modified starch is 4:1.

[0089] In nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, the mass ratio of N, P2O5 and K2O is 11.1:14.4:14.2.

[0090] (2) Preparation of microbial fertilizer:

[0091] a. Mix cow dung and Flammulina velutipes residue in equal amounts, inoculate with 2% methylotrophic Bacillus, and ferment at 35°C for 22h to obtain a fermentation product;

[0092] b. The obtained fermentation product is refined to a particle size of less than 2 mm to obtain a fertilizer matrix;

[0093] c. Inoculate 2% of green Trichoderma into the fertilizer matrix to obtain microbial fertilizer.

[0094] (3) Preparation of stable fertilizer:

[0095] The coated inorganic fertilizer, microbial fertilizer, potassium sulfate, anionic polyacrylamide (molecular weight 10 Mg / mol), humic acid, threonine, and polyaspartic acid are mixed and stirred to obtain a mixed fertilizer, which is a greenhouse gas emission reduction and stabilization fertilizer.

[0096] The prepared fertilizer was applied as base fertilizer in corn fields at an application rate of 450 kg / mu. The control group was treated with conventional nitrogen, phosphorus and potassium compound fertilizers. The field management was the same and no other fertilizers were applied during the experiment. The greenhouse gas emission flux was measured using the sealed static chamber method. The results showed that after 3 months, the cumulative CH4 emission in the experimental group was 7.92 mg / m 2The cumulative emission of N2O is 15.8 mg / m 2 The cumulative CH4 emission in the control group was 8.29 mg / m 2 The cumulative emission of N2O is 21.9 mg / m 2 .

[0097] Example 5

[0098] A mixed greenhouse gas emission reduction and stabilization fertilizer, the raw materials of which include the following quality components:

[0099] 23 parts of coated inorganic fertilizer, 50 parts of microbial fertilizer, 1.4 parts of potassium magnesium sulfate, 34 parts of anionic polyacrylamide, 53 parts of humic acid, 1.8 parts of threonine, and 2.6 parts of polyaspartic acid;

[0100] The preparation method is as follows:

[0101] (1) Preparation of coated inorganic fertilizers:

[0102] a. Preparation of modified starch: Add potato starch to twice its mass of water, heat to 65°C for gelatinization for 15 minutes to obtain a gelatinized solution, adjust the system temperature to 45°C, then add epichlorohydrin and N,N-methylenebisacrylamide (mass ratio 3.5:1), stir and react for 30 minutes to obtain modified starch; the total mass of epichlorohydrin and N,N-methylenebisacrylamide is 2% of the potato starch gelatinized solution.

[0103] b. Use modified starch to encapsulate nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and the mass ratio of the total mass of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer to the modified starch is 4:1.

[0104] In nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, the mass ratio of N, P2O5 and K2O is 11.2:13.9:14.3.

[0105] (2) Preparation of microbial fertilizer:

[0106] a. Mix cow dung and Flammulina velutipes residue in equal amounts, inoculate with 2% methylotrophic Bacillus, and ferment at 37°C for 24 hours to obtain a fermentation product;

[0107] b. The obtained fermentation product is refined to a particle size of less than 2 mm to obtain a fertilizer matrix;

[0108] c. Inoculate 1.5% of green Trichoderma into the fertilizer matrix to obtain microbial fertilizer.

[0109] (3) Preparation of stable fertilizer:

[0110] The coated inorganic fertilizer, microbial fertilizer, potassium magnesium sulfate, anionic polyacrylamide (molecular weight 8Mg / mol), humic acid, threonine, and polyaspartic acid are mixed and stirred to obtain a mixed fertilizer, which is a greenhouse gas emission reduction and stabilization fertilizer.

[0111] The prepared fertilizer was applied as base fertilizer in corn fields at an application rate of 450 kg / mu. The control group was treated with conventional nitrogen, phosphorus and potassium compound fertilizers. The field management was the same and no other fertilizers were applied during the experiment. The greenhouse gas emission flux was measured using the sealed static chamber method. The results showed that after 3 months, the cumulative CH4 emission in the experimental group was 7.94 mg / m 2 The cumulative emission of N2O is 15.5 mg / m 2 The cumulative CH4 emission in the control group was 8.29 mg / m 2 The cumulative emission of N2O is 21.9 mg / m 2 .

[0112] In the above Examples 1-5, the control group is the same set of experimental data.

[0113] Comparative Example 1

[0114] The only difference from Example 1 is that N,N-methylenebisacrylamide is replaced by an equal mass of epichlorohydrin.

[0115] The greenhouse gas emission flux was measured using the sealed static chamber method of Example 1. The results showed that after 3 months, the cumulative CH4 emission of the experimental group was 7.86 mg / m 2 The cumulative emission of N2O is 18.6 mg / m 2 .

[0116] Comparative Example 2

[0117] The only difference from Example 1 is that the methylotrophic Bacillus is replaced by Bacillus subtilis.

[0118] The greenhouse gas emission flux was measured using the sealed static chamber method of Example 1. The results showed that after 3 months, the cumulative CH4 emission of the experimental group was 7.87 mg / m 2 The cumulative N2O emission is 17.9 mg / m 2 .

[0119] The fertilizers prepared in Examples 1-5 and Comparative Examples 1-2 were applied as base fertilizers in corn fields at an application rate of 450 kg / mu, and the control group was treated with conventional nitrogen, phosphorus and potassium compound fertilizers. The field management was the same, and no other fertilizers were applied during the test. After the growth period, the yields of the experimental groups and the control group are shown in Table 1:

[0120] Table 1

[0121]

[0122]

[0123] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A greenhouse gas emission reduction and stable fertilizer, characterized in that: The raw materials consist of the following components in parts by weight: 20-25 parts of coated inorganic fertilizer, 50-65 parts of microbial fertilizer, 1.2-1.5 parts of sulfate, 20-35 parts of anionic polyacrylamide, 40-55 parts of humic acid, 1-2 parts of threonine, 2-3 parts of polyaspartic acid; The preparation method of the coated inorganic fertilizer is: (1) Preparation of modified starch: epichlorohydrin and N,N-methylenebisacrylamide are added to a potato starch gelatinized liquid, and the mixture is stirred and reacted at 40-45° C. for 20-30 minutes to obtain modified starch; (2) using modified starch to coat nitrogen fertilizer, phosphate fertilizer and potash fertilizer to obtain the coated inorganic fertilizer; The total mass of the epichlorohydrin and N,N-methylenebisacrylamide is 2%-2.5% of the potato starch gelatinized liquid; the mass ratio of the epichlorohydrin and N,N-methylenebisacrylamide is 3.5-4:1; The mass ratio of the total mass of the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer to the modified starch is 4-5:1; the mass ratio of N, P2O5 and K2O in the nitrogen fertilizer, the phosphorus fertilizer and the potassium fertilizer is 10.8-11.2:13.5-14.8:13.3-14.6; The preparation method of the microbial fertilizer is: (1) mixing livestock and poultry manure with edible fungus residue, inoculating methylotrophic Bacillus, fermenting at 35-37° C. for 20-24 hours, and refining the obtained fermentation product to obtain a fertilizer matrix; (2) inoculating Trichoderma viride into the fertilizer matrix to obtain a microbial fertilizer; The inoculation amount of the methylotrophic Bacillus is 1%-2% of the total mass of the livestock manure and edible fungus residue; the inoculation amount of the green Trichoderma is 1.5%-2% of the mass of the fertilizer matrix; The sulfate is potassium sulfate or potassium magnesium sulfate; the molecular weight of the anionic polyacrylamide is 8-10Mg / mol.

2. The method for preparing the greenhouse gas emission reduction and stable fertilizer according to claim 1, characterized in that: The method comprises the following steps: mixing the raw materials according to a mass ratio to obtain the greenhouse gas emission reduction and stabilization fertilizer.

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