Soil conditioner based on nitrification inhibition and soil acid control method

Abstract

The invention relates to a soil conditioner based on nitrification inhibition and a soil acid control method, and belongs to the technical field of soil conditioning, the soil conditioner comprises the following components by weight: 20-22 parts of humic acid, 32-36 parts of syringic acid-linoleic acid modified porous hydroxyapatite, 4-5 parts of complete nitrifying bacteria, 2-5 parts of syringic acid, and 2.8-4.2 parts of sodium carboxymethyl cellulose. According to the technical scheme, syringic acid and linoleic acid serve as nitrification inhibitors, the nitrification inhibition rate can be effectively increased, ecological niches of ammonia-oxidizing archaea and ammonia-oxidizing bacteria can be reduced through competitive occupation due to addition of complete nitrifying bacteria, the nitrification rate of the ammonia-oxidizing archaea and the ammonia-oxidizing bacteria is inhibited, and N2O emission is reduced. Humic acid and hydroxyapatite can be used as pH buffer substances to regulate and control soil acidity, aluminum toxicity can be relieved, and physical and chemical properties of soil can be improved; meanwhile, the complete nitrifying bacteria can be ensured to have relatively high activity under the condition that the pH is 5.5-6.5.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of soil conditioning, and particularly relates to a soil conditioner based on nitrification inhibition and a soil acid control method. BACKGROUND

[0002] Long-term application of ammonium nitrogen fertilizer leads to H + , which is the main cause of acidification of farmland soil. Traditional acid control methods (such as lime application) can only neutralize the existing acidity and cannot block the root cause of continuous acidification. Nitrification inhibitors are a kind of compounds that can delay the occurrence of nitrification. Application of nitrification inhibitors can effectively slow down the conversion of nitrogen and the accumulation of nitrate, and also has an emission reduction effect on N2O. At present, nitrification inhibitors can be divided into synthetic nitrification inhibitors and biological nitrification inhibitors. Synthetic nitrification inhibitors include dicyandiamide (DCD), 3,4-dimethylpyrazole phosphate (DMPP), etc. Although synthetic nitrification inhibitors can delay the conversion of ammonium nitrogen, they have problems such as unstable performance, toxicity, and easy degradation, so they are difficult to promote and use in a large range of agricultural ecosystems, and may cause environmental risks due to volatility or residues. Biological nitrification inhibitors include p-hydroxyphenylpropionic acid methyl ester, 1,9-decadiol, and syringic acid, etc. Biological nitrification inhibitors are derived from plant secretions or extracts and belong to environmentally friendly substances, which have good development potential. Therefore, it is necessary to provide a green and efficient soil conditioner based on nitrification inhibition. SUMMARY

[0003] The purpose of the present application is to provide a soil conditioner based on nitrification inhibition and a soil acid control method to solve the problems mentioned in the background.

[0004] The purpose of the present application can be achieved by the following technical solutions: A soil conditioner based on nitrification inhibition comprises the following components by weight: Humic acid 20-22 parts, syringic acid-oleic acid modified porous hydroxyapatite 32-36 parts, full-range nitrifying bacteria 4-5 parts, syringic acid 2-5 parts, and sodium carboxymethyl cellulose 2.8-4.2 parts.

[0005] The soil conditioner based on nitrification inhibition provided by the application, eugenol and linoleic acid as nitrification inhibitors, can effectively improve the nitrification inhibition rate through the synergistic effect of eugenol and linoleic acid, and the addition of comammox can reduce the ecological niche of ammonia-oxidizing archaea and ammonia-oxidizing bacteria by competitive occupation, inhibit the nitrification rate of ammonia-oxidizing archaea and ammonia-oxidizing bacteria, and reduce N2O emission. The application effectively reduces N2O emission and improves the utilization rate of nitrogen elements in the fertilizer through the synergistic effect of eugenol, linoleic acid and comammox. The application loads eugenol and linoleic acid in porous hydroxyapatite. On the one hand, porous hydroxyapatite as a carrier can improve the stability of eugenol and linoleic acid and prolong the action time. At the same time, eugenol and linoleic acid are liposoluble compounds and are not easy to lose in soil, thereby further prolonging the action time and improving the nitrification inhibition rate. On the other hand, the coating of liposoluble eugenol and linoleic acid can improve the hydrophobicity of porous hydroxyapatite, delay the dissolution of hydroxyapatite in acidic soil, reduce the loss of water washing, and prolong the action time.

[0006] Humic acid and hydroxyapatite can be used as pH buffering substances to regulate soil acidity, maintain soil pH at 5.5-6.5, alleviate aluminum toxicity, and improve soil physical and chemical properties. At the same time, comammox can have high activity under pH 5.5-6.5. In addition, humic acid can be decomposed and transformed by microorganisms to serve as an auxiliary carbon source to improve the abundance of comammox.

[0007] A preparation method of a soil conditioner based on nitrification inhibition, comprising the following steps: Mix eugenol, humic acid and eugenol-linoleic acid modified porous hydroxyapatite uniformly, add sodium carboxymethyl cellulose aqueous solution, mix and stir, then add comammox suspension, mix uniformly, granulate, add to a coating machine and spray coating liquid for coating, solidify, and obtain the soil conditioner based on nitrification inhibition.

[0008] Further, the mass concentration of the sodium carboxymethyl cellulose aqueous solution is 3-5%.

[0009] Further, the concentration of the comammox suspension is 10 8 -10 9 CFU / mL.

[0010] Further, the preparation method of the coating liquid comprises the following steps: Add sodium dodecyl sulfate to deionized water and stir uniformly, add dimethylaminoethyl methacrylate, butyl acrylate and ethylene glycol dimethacrylate for pre-emulsification, add an initiator under nitrogen protection, and react at 80℃ for 4-6h to obtain the coating liquid.

[0011] Further, the use amount ratio of sodium dodecyl sulfate, deionized water, dimethylaminoethyl methacrylate, butyl acrylate, ethylene glycol dimethacrylate and initiator is (1-1.3) g:(200-250) mL:(30-35) g:(58-60) g:(1.3-1.6) g:(0.4-0.7) g.

[0012] The film layer formed by the film forming liquid has pH responsiveness, and can make the soil conditioner based on nitrification inhibition release active ingredients to act on the soil in the acidic soil.

[0013] Further, the preparation method of the syringic acid-linoleic acid modified porous hydroxyapatite comprises the following steps: A1, under a nitrogen atmosphere, dissolve linoleic acid in anhydrous ethanol, add porous hydroxyapatite and ultrasonic oscillation, stir in a water bath at 70 DEG C until the solvent evaporates, wash, dry and grind to obtain linoleic acid modified porous hydroxyapatite; Further, in step A1, the mass ratio of linoleic acid to porous hydroxyapatite is (3-5):100.

[0014] In the above preparation process, the carboxyl group of linoleic acid and the calcium ion of porous hydroxyapatite are coordinated, so that the linoleic acid is loaded on the surface and pore of the porous hydroxyapatite, forming a hydrophobic linoleic acid modified porous hydroxyapatite.

[0015] A2, dissolve syringic acid in an ethanol aqueous solution, then add the linoleic acid modified porous hydroxyapatite, ultrasonic oscillate for 2-3 h under a nitrogen atmosphere at 40 DEG C, and dry to obtain syringic acid-linoleic acid modified porous hydroxyapatite.

[0016] Further, in step A2, the mass ratio of syringic acid to linoleic acid modified porous hydroxyapatite is (1.5-2):100.

[0017] Further, in step A2, the volume ratio of ethanol to water in the ethanol aqueous solution is 7:3.

[0018] In the above preparation process, the hydrophobic interaction between syringic acid and linoleic acid modified porous hydroxyapatite enables the syringic acid to be loaded on the surface and pore of the porous hydroxyapatite, obtaining syringic acid-linoleic acid modified porous hydroxyapatite. Syringic acid has antioxidant properties and can inhibit the oxidation of linoleic acid.

[0019] A soil acid control method comprises the following steps: The above prepared soil conditioner based on nitrification inhibition is mixed with acidic soil, and then repaired at 25-30 DEG C.

[0020] Further, the addition amount of the soil conditioner based on nitrification inhibition is 0.3-0.5% of the quality of the acidic soil.

[0021] Advantages of the present application: (1) In the technical scheme of the present application, eugenol and linoleic acid are used as nitrification inhibitors, and the nitrification inhibition rate can be effectively improved through the synergistic effect of eugenol and linoleic acid. The addition of full-process nitrifying bacteria can reduce the ecological niche of ammonia-oxidizing archaea and ammonia-oxidizing bacteria by competitive occupation, inhibit the nitrification rate of ammonia-oxidizing archaea and ammonia-oxidizing bacteria, and reduce N2O emission. The present application effectively reduces N2O emission and improves the utilization rate of nitrogen elements in fertilizers through the synergistic effect of eugenol, linoleic acid and full-process nitrifying bacteria.

[0022] (2) In the technical scheme of the present application, humic acid and hydroxyapatite can be used as pH buffering substances to regulate soil acidity and maintain soil pH at 5.5-6.5. They can also alleviate aluminum toxicity and improve soil physical and chemical properties. At the same time, the full-process nitrifying bacteria can maintain high activity under pH 5.5-6.5. In addition, humic acid can be decomposed and transformed by microorganisms to serve as an auxiliary carbon source, thereby improving the abundance of full-process nitrifying bacteria.

[0023] (3) In the technical scheme of the present application, eugenol and linoleic acid are loaded on porous hydroxyapatite. On the one hand, porous hydroxyapatite can improve the stability of eugenol and linoleic acid and prolong the action time. Moreover, eugenol and linoleic acid are liposoluble compounds that are not easily lost in soil, thereby further prolonging the action time and improving the nitrification inhibition rate. On the other hand, the coating of liposoluble eugenol and linoleic acid can improve the hydrophobicity of porous hydroxyapatite, delay the dissolution of hydroxyapatite in acidic soil, reduce the loss caused by water erosion, and prolong the action time. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Preparation Example 1 The present preparation example provides a preparation method of eugenol-linoleic acid modified porous hydroxyapatite, which comprises the following steps: A1, under a nitrogen atmosphere, 9g of linoleic acid is dissolved in anhydrous ethanol, 300g of porous hydroxyapatite is added and ultrasonically oscillated for 30min, and then stirred in a water bath at 70℃ until the solvent evaporates. After washing, drying and grinding, eugenol-linoleic acid modified porous hydroxyapatite is obtained. A2, 5.4g of eugenol was dissolved in 500mL of ethanol aqueous solution (volume ratio of ethanol and water is 7:3), then 300g of linoleic acid modified porous hydroxyapatite was added, ultrasonic oscillation was carried out under nitrogen atmosphere at 40℃ for 3h, drying was carried out, and eugenol-linoleic acid modified porous hydroxyapatite was obtained.

[0026] Preparation Example 2 The preparation example provides a preparation method of eugenol-linoleic acid modified porous hydroxyapatite, which comprises the following steps: A1, 15g of linoleic acid was dissolved in anhydrous ethanol under nitrogen atmosphere, 300g of porous hydroxyapatite was added, ultrasonic oscillation was carried out for 50min, water bath stirring was carried out at 70℃ until the solvent evaporated, washing, drying and grinding were carried out, and linoleic acid modified porous hydroxyapatite was obtained; A2, 5.4g of eugenol was dissolved in 500mL of ethanol aqueous solution (volume ratio of ethanol and water is 7:3), then 300g of linoleic acid modified porous hydroxyapatite was added, ultrasonic oscillation was carried out under nitrogen atmosphere at 40℃ for 3h, drying was carried out, and eugenol-linoleic acid modified porous hydroxyapatite was obtained.

[0027] Preparation Example 3 The preparation example provides a preparation method of eugenol-linoleic acid modified porous hydroxyapatite, which comprises the following steps: A1, 15g of linoleic acid was dissolved in anhydrous ethanol under nitrogen atmosphere, 300g of porous hydroxyapatite was added, ultrasonic oscillation was carried out for 50min, water bath stirring was carried out at 70℃ until the solvent evaporated, washing, drying and grinding were carried out, and linoleic acid modified porous hydroxyapatite was obtained; A2, 5.4g of eugenol was dissolved in 500mL of ethanol aqueous solution (volume ratio of ethanol and water is 7:3), then 300g of linoleic acid modified porous hydroxyapatite was added, ultrasonic oscillation was carried out under nitrogen atmosphere at 40℃ for 3h, drying was carried out, and eugenol-linoleic acid modified porous hydroxyapatite was obtained.

[0028] A soil conditioner based on nitration inhibition comprises the following components in parts by weight: Humic acid 20 parts, eugenol-linoleic acid modified porous hydroxyapatite prepared in preparation example 2 32 parts, total nitrifying bacteria 4 parts, eugenol 3 parts, sodium carboxymethyl cellulose 2.8 parts.

[0029] A preparation method of soil conditioner based on nitration inhibition comprises the following steps: Eugenol, humic acid and eugenol-linoleic acid modified porous hydroxyapatite were mixed uniformly, a 3% sodium carboxymethyl cellulose aqueous solution was added and mixed and stirred, a 10 8The full-range nitrifying bacteria suspension of CFU / mL is mixed and granulated; after granulation, it is added to the coating machine and sprayed with the coating liquid to coat (the film layer thickness is 28 pm), and solidified (80℃ hot air treatment for 10 min) to obtain the soil conditioner based on nitrification inhibition.

[0030] The preparation method of the coating liquid comprises the following steps: Sodium dodecyl sulfate is added to deionized water and stirred uniformly, dimethylaminoethyl methacrylate, butyl acrylate and ethylene glycol dimethacrylate are added for pre-emulsification for 15 min, initiator ammonium persulfate is added under nitrogen protection, and the reaction is carried out at 80℃ for 4h to obtain the coating liquid; the amount ratio of sodium dodecyl sulfate, deionized water, dimethylaminoethyl methacrylate, butyl acrylate, ethylene glycol dimethacrylate and initiator is 1g:200mL:30g:58g:1.3g:0.4g. Example 2:

[0031] A soil conditioner based on nitrification inhibition comprises the following components in weight fractions: Humic acid 21 parts, syringic acid-linoleic acid modified porous hydroxyapatite 34 parts, full-range nitrifying bacteria 4.4 parts, syringic acid 3.8 parts, sodium carboxymethyl cellulose 4 parts.

[0032] The preparation method of the soil conditioner based on nitrification inhibition comprises the following steps: Syringic acid, humic acid and syringic acid-linoleic acid modified porous hydroxyapatite are mixed uniformly, a 4% mass concentration carboxymethyl cellulose sodium aqueous solution is added and mixed and stirred, and then a 5×10 8 The full-range nitrifying bacteria suspension of CFU / mL is mixed and granulated; after granulation, it is added to the coating machine and sprayed with the coating liquid to coat (the film layer thickness is 30 pm), and solidified (80℃ hot air treatment for 10 min) to obtain the soil conditioner based on nitrification inhibition.

[0033] The preparation method of the coating liquid comprises the following steps: Sodium dodecyl sulfate is added to deionized water and stirred uniformly, dimethylaminoethyl methacrylate, butyl acrylate and ethylene glycol dimethacrylate are added for pre-emulsification for 20 min, initiator ammonium persulfate is added under nitrogen protection, and the reaction is carried out at 80℃ for 5h to obtain the coating liquid; the amount ratio of sodium dodecyl sulfate, deionized water, dimethylaminoethyl methacrylate, butyl acrylate, ethylene glycol dimethacrylate and initiator is 1.1g:220mL:33g:60g:1.4g:0.53g. Example 3:

[0034] A soil conditioner based on nitrification inhibition comprises the following components in weight fractions: Humic acid 22 parts, syringic acid-linoleic acid modified porous hydroxyapatite prepared in Preparation Example 2 36 parts, total nitrification bacteria 5 parts, syringic acid 5 parts, sodium carboxymethyl cellulose 4.2 parts.

[0035] The preparation method of the soil conditioner based on nitrification inhibition comprises the following steps: Syringic acid, humic acid and syringic acid-linoleic acid modified porous hydroxyapatite are uniformly mixed, a 5% mass concentration carboxymethyl cellulose sodium aqueous solution is added for mixing and stirring, and a 7×10 8 The total nitrification bacteria suspension with a CFU / mL of 1.0×109 is uniformly mixed and granulated, and after granulation, the granules are added to a coating machine and sprayed with a coating liquid to perform coating (a film layer thickness of 35 μm), and solidification (80°C hot air treatment for 10 min) to obtain the soil conditioner based on nitrification inhibition.

[0036] The preparation method of the coating liquid comprises the following steps: Sodium dodecyl sulfate is added to deionized water and stirred to be uniform, dimethylaminoethyl methacrylate, butyl acrylate and ethylene glycol dimethacrylate are added for pre-emulsification for 20 min, an initiator ammonium persulfate is added under nitrogen protection, and reaction is carried out at 80°C for 6 h to obtain the coating liquid; the amount ratio of sodium dodecyl sulfate, deionized water, dimethylaminoethyl methacrylate, butyl acrylate, ethylene glycol dimethacrylate and the initiator is 1.3 g: 250 mL: 35 g: 60 g: 1.6 g: 0.7 g.

[0037] Comparative Example 1 Compared with Example 2, in Comparative Example 1, linoleic acid and syringic acid are not loaded on the porous hydroxyapatite, but are directly physically blended with the total nitrification bacteria, humic acid and porous hydroxyapatite, and other steps and raw materials are the same as in Example 2.

[0038] Comparative Example 2 Compared with Example 2, in Comparative Example 2, linoleic acid is not added, but is replaced by an equal amount of syringic acid, and other steps and raw materials are the same as in Example 2.

[0039] Comparative Example 3 Compared with Example 2, in Comparative Example 3, syringic acid is not added, but is replaced by an equal amount of linoleic acid, and other steps and raw materials are the same as in Example 2.

[0040] Comparative Example 4 Compared with Example 2, in Comparative Example 4, the total nitrification bacteria are not added, and other steps and raw materials are the same as in Example 2.

[0041] Performance detection (1) Nitrogen utilization rate, N2O emission and AOA inhibition rate test After removing impurities from acidic soil (pH 4.45), air-drying and sieving through a 2mm sieve, 10g of the dry soil was placed in a culture bottle. Distilled water was added to adjust the soil moisture content to 60%. The soil was then incubated at 25℃ in the dark. After 1 day of pre-incubation, (NH4)2SO4 and a soil conditioner were added. A total of 8 experimental groups were set up, with 3 replicates per group. The bottle openings were sealed with sealing film and small holes were evenly punched to ensure ventilation. The bottles were then placed in a 25℃ incubator for 21 days in the dark. During the incubation period, the sealing film was opened every day to weigh the soil and add water to maintain a moisture content of 60% WHC. After 7 days of incubation, destructive sampling of the soil was performed to determine the NO content. 3- -N, via NO 3- -N content characterizes the intensity of nitrification and calculates the nitrification inhibition rate. A portion of the soil was freeze-dried and stored at -80℃ for soil microbial analysis. N2O gas was collected on days 1, 2, 3, 4, 5, 7, 14, and 21 of cultivation. The glass bottle was vented and sealed with a rubber stopper for 23 hours the day before each sampling. During sampling, 20 mL of gas was collected by repeatedly extracting the gas three times with a 25 mL syringe and injected into a vacuum bottle for determining the N2O concentration. The eight experimental groups were: 1. (NH4)2SO4, 2. (NH4)2SO4 + soil conditioner prepared in Example 1, 3. (NH4)2SO4 + soil conditioner prepared in Example 2, 4. (NH4)2SO4 + soil conditioner prepared in Example 3, 5. (NH4)2SO4 + soil conditioner prepared in Comparative Example 1, 6. (NH4)2SO4 + soil conditioner prepared in Comparative Example 2, 7. (NH4)2SO4 + soil conditioner prepared in Comparative Example 3, and 8. (NH4)2SO4 + soil conditioner prepared in Comparative Example 3. The amount of (NH4)2SO4 added in each group was 1 mg, and the amount added in Examples 1-3 and Comparative Examples 1-4 was 30 mg.

[0042] Table 1

[0043] As shown in Table 1, the soil conditioner based on nitrification inhibition prepared in this invention can effectively inhibit nitrification and N2O emissions, and reduce the abundance of AOA. Comparing the data from Example 2 and Comparative Example 1, it can be seen that loading linoleic acid and syringic acid onto porous hydroxyapatite can effectively improve the nitrification inhibition rate, N2O inhibition rate, and AOA inhibition rate. Comparing the data from Example 2 and Comparative Examples 2-3, it can be seen that syringic acid and linoleic acid have a synergistic effect, jointly improving the nitrification inhibition rate, N2O inhibition rate, and AOA inhibition rate. Comparing the data from Example 2 and Comparative Example 4, it can be seen that the addition of nitrifying bacteria throughout the process can significantly reduce the abundance of AOA.

[0044] (2) pH adjustment performance test The soil conditioners based on nitrification inhibition prepared in Examples 1-3 were respectively mixed with the acid soil (initial pH value is 4.45) and then remediated at 25℃, the addition amount of the soil conditioner based on nitrification inhibition is 0.3% of the mass of the acid soil, and the soil pH value was detected after 30 days.

[0045] Table 2

[0046] As can be seen from the data in Table 2, the soil conditioner prepared by the present application has good pH adjusting effect.

[0047] The physicochemical properties of the acid soil are shown in Table 3.

[0048] Table 3

[0049] In the description of the specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above is only an example and description of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as it does not deviate from the invention or exceed the scope defined by the present claims, which shall belong to the protection scope of the present application.

Claims

1. A nitrification-inhibited soil conditioner, characterized by: The components include the following weight parts: humic acid 20-22 parts, clove acid-linoleic acid modified porous hydroxyapatite 32-36 parts, full-range nitrifying bacteria 4-5 parts, clove acid 2-5 parts, sodium carboxymethyl cellulose 2.8-4.2 parts.

2. A nitrification-inhibited soil conditioner according to claim 1, characterised in that: The preparation method of the clove acid-linoleic acid modified porous hydroxyapatite comprises the following steps: A1, under a nitrogen atmosphere, dissolve linoleic acid in anhydrous ethanol, add porous hydroxyapatite and ultrasonically oscillate, stir in a water bath at 70 DEG C until the solvent evaporates, wash, dry and grind to obtain linoleic acid modified porous hydroxyapatite; A2, dissolve clove acid in an ethanol aqueous solution, then add the linoleic acid modified porous hydroxyapatite, ultrasonically oscillate for 2-3 hours under a nitrogen atmosphere at 40 DEG C, and dry to obtain clove acid-linoleic acid modified porous hydroxyapatite.

3. A nitrification-inhibited soil conditioner according to claim 2, characterised in that: In the step A1, the mass ratio of linoleic acid to porous hydroxyapatite is (3-5):

100.

4. A nitrification-inhibited soil conditioner according to claim 2, characterised in that: In the step A2, the mass ratio of clove acid to linoleic acid modified porous hydroxyapatite is (1.5-2):100; the volume ratio of ethanol to water in the ethanol aqueous solution is 7:

3.

5. A method of preparing a nitrification-inhibited soil conditioner as claimed in any one of claims 1 to 4, characterised by: The method comprises the following steps: Mix the clove acid, humic acid and clove acid-linoleic acid modified porous hydroxyapatite uniformly, add a sodium carboxymethyl cellulose aqueous solution, mix and stir, then add a full-range nitrifying bacteria suspension, mix uniformly, granulate, add to a coating machine and spray a coating liquid to coat, and solidify to obtain a soil conditioner based on nitrification inhibition.

6. A method of preparing a nitrification-inhibited soil conditioner according to claim 5, characterised in that: The mass concentration of the sodium carboxymethyl cellulose aqueous solution is 3-5%; the concentration of the whole-course nitrifying bacteria suspension is 10 8 -10 9 CFU / mL.

7. A method of preparing a nitrification-inhibited soil conditioner according to claim 5, characterized in that: The preparation method of the coating liquid comprises the following steps: Add sodium dodecyl sulfate to deionized water and stir uniformly, add dimethylaminoethyl methacrylate, butyl acrylate and ethylene glycol dimethacrylate for pre-emulsification, add an initiator under nitrogen protection, and react at 80 DEG C for 4-6 hours to obtain the coating liquid.

8. A method of preparing a nitrification-inhibited soil conditioner according to claim 7, characterised in that: The amount ratio of the sodium dodecyl sulfate, deionized water, dimethylaminoethyl methacrylate, butyl acrylate, ethylene glycol dimethacrylate and initiator is (1-1.3) g:(200-250) mL:(30-35) g:(58-60) g:(1.3-1.6) g:(0.4-0.7) g.

9. A method of soil acid control, characterized by: The method comprises the following steps: Mix the soil conditioner based on nitrification inhibition with acid soil according to claim 1, and then stand and repair.

10. The method of claim 9, wherein: The addition amount of the soil conditioner based on nitrification inhibition is 0.3-0.5% of the mass of the acid soil.

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