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CN118324590B - Nitrogen fertilizer synergist composition and application thereof - Google Patents

Nitrogen fertilizer synergist composition and application thereof

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Publication number
CN118324590B
CN118324590B CN202410414119.7A CN202410414119A CN118324590B CN 118324590 B CN118324590 B CN 118324590B CN 202410414119 A CN202410414119 A CN 202410414119A CN 118324590 B CN118324590 B CN 118324590B
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nitrogen
nitrogen fertilizer
solution
parts
fertilizer
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CN118324590A (en
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刘蕊
李冬佳
王琪
杨婷
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China Agricultural University
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China Agricultural University
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Soil Sciences (AREA)
  • Fertilizers (AREA)

Abstract

The invention discloses a nitrogen fertilizer synergist composition and application thereof. The nitrogen fertilizer synergistic agent composition is prepared from the following raw materials, by mass, 5-40 parts of an organic polymer material, 1-5 parts of polyolefin, 5-35 parts of a cross-linking agent, 2-10 parts of an inorganic acid, 50-100 parts of a plant extract, 5-30 parts of an inorganic salt, 5-30 parts of a polymer, 5-30 parts of a nitrogen synergistic agent and 1000-3000 parts of water. The nitrogen fertilizer synergist composition provided by the invention can improve the utilization rate of nitrogen in soil or nitrogen fertilizer, namely can inhibit the conversion of ammonium nitrogen into nitrate nitrogen, and reduces the loss of nitrogen fertilizer in the form of nitrate nitrogen. The nitrogen fertilizer synergist composition can effectively improve the stability of the nitrogen fertilizer synergist in the processes of fertilizer production, storage, transportation and application, realize the activity protection of the nitrogen fertilizer synergist, improve the agricultural effect of the nitrogen fertilizer synergist and reduce the emission of greenhouse gases generated by nitrogen fertilizer.

Description

Nitrogen fertilizer synergist composition and application thereof
Technical Field
The invention relates to a nitrogen fertilizer synergist composition and application thereof, and belongs to the technical field of agricultural preparations.
Background
The use of nitrogen fertilizer potentiators, such as nitrification inhibitors and urease inhibitors, in agriculture as a strategy to solve ecological problems caused by fertilizer use and to increase crop yield is becoming increasingly popular worldwide. Despite their potential, these inhibitors degrade over time due to soil physicochemical and biological processes, thereby reducing their intended environmental advantages.
Taking the nitrification inhibitor 3, 4-dimethylpyrazole phosphate (DMPP) as an example, the application amount of the nitrification inhibitor must be ten times that of the standard application amount when the soil temperature exceeds 30 ℃. The hydrophobic organic component in the soil that binds to DMPP affects the efficiency of DMPP. N-butylthiophosphoric triamide (NBPT) as a urease inhibitor has a significant effect on the half-life of the soil in terms of texture, and in addition, microbial degradation and the presence of low concentration heavy metal ions in the soil are also considered factors that affect the degradation of nitrogen synergists. Although the nitrogen fertilizer synergist applied to the soil should eventually decompose into environmentally benign products, premature degradation during the crop growing season is highly undesirable as it can lead to loss of inhibition and does not achieve the goal of reducing nitrogen loss.
Furthermore, since nitrogen fertilizer is often added as an additive to commercial fertilizer granules, nitrification inhibitors may be dissolved in the melt prior to urea granulation or prilling (US 5352265), or applied as a coating to the fertilizer granules (US 5698003). After the fertilizers are produced, the fertilizers are transported from factories to fields and used in sowing seasons. Thus, over time, nitrification inhibitors in these fertilizers can be subjected to significant environmental stresses, including fluctuations in temperature, humidity, and fertilizer pH.
The problems of improving limited stability, volatility, significant differences in inhibition efficiency in different soils, and the like of nitrogen fertilizer synergists are important points of current interest. For example, it is proposed in patent WO 2018007426 to design a urease inhibitor composition using an organic solution to reduce degradation of the urease inhibitor, and in US2018265425 to protect nitrosylated inhibitor nitrosyline by forming a polyurea shell through an interfacial polycondensation reaction between polymeric isocyanate and polyamine to produce a microcapsule wall. Although systematically designing and testing the coating system helps to reduce the impact of the negative environment on the stability of the nitrogen synergist by isolating the nitrogen synergist from the external environment, the evaluation is mainly directed at the degradation rate of the nitrogen synergist itself, rarely simulating the addition link of the fertilizer chain nitrogen synergist and the soil degradation and efficacy conditions of the nitrogen synergist. Because it is widely believed that achieving a physical barrier to the nitrogen booster by the coating will affect its release rate, the initial nitrogen booster will not achieve the desired dosage impact application. The improvement of the stability of the nitrogen synergist should be finally realized to the practical agricultural effect, and the nitrogen synergist has higher practical application value.
In conclusion, the development of a feasible technology for improving the stability of the nitrogen synergist and the agricultural efficiency is significant in reducing the adding cost of the nitrogen synergist, reducing the nitrogen loss and realizing low-carbon agriculture.
Disclosure of Invention
The invention aims to provide a nitrogen fertilizer synergist composition which can delay the occurrence time of N 2 O emission and reduce the total emission amount of N 2 O.
The invention provides a nitrogenous fertilizer synergistic agent composition which is prepared from the following raw materials in parts by mass:
5-40 parts of organic polymer material, 1-5 parts of polyolefin, 5-35 parts of cross-linking agent, 2-10 parts of inorganic acid, 50-100 parts of plant extract, 5-30 parts of inorganic salt, 5-30 parts of polymer, 5-30 parts of nitrogen synergist and 1000-3000 parts of water.
Preferably, the nitrogen synergist comprises 3, 4-dimethylpyrazole phosphate (DMPP), 3, 4-dimethylpyrazole, n-butylthiophosphoric triamide, dicyandiamide, nitropyridine and hydrogen.
Preferably, the organic polymer material is sodium alginate;
The polyolefin is polyvinyl alcohol, polyacrylate, polyethylene glycol or polylactic acid;
the cross-linking agent is calcium chloride or calcium lactate;
The inorganic acid is boric acid or phosphoric acid;
the plant extract is at least one of tannic acid, tea polyphenols and gallic acid, preferably tannic acid;
the inorganic salt is at least one of ferric salt, cupric salt, zinc salt and manganese salt, preferably ferric chloride;
the high polymer is at least one of polyvinylpyrrolidone, polyethylene glycol, sodium poly-4-styrenesulfonate and polydimethyldiallyl ammonium chloride, preferably polyvinylpyrrolidone (molecular weight of 44000-54000).
The invention provides a preparation method of the nitrogen fertilizer synergist composition, which comprises the following steps:
s1, mixing a polyolefin solution (obtained by stirring at 60-90 ℃ for 6-12 hours) with a solution of an organic polymer material and a nitrogen synergist to obtain a mixed solution I;
s2, pumping the mixed solution I into a syringe, and dripping the mixed solution I into the crosslinking liquid to form gel microspheres;
the crosslinking liquid is a mixed solution of a crosslinking agent and inorganic acid;
S3, mixing a plant extract solution, an inorganic salt solution and a high polymer solution, adjusting the pH to 5.7-6.7 (adopting sodium hydroxide), and standing to obtain a mixed solution II;
And S4, mixing the gel microspheres with the mixed solution II, vibrating (0.5-1 h), sieving (sieving the unwrapped mixed solution II), and freeze-drying to obtain the gel microsphere.
In the above preparation method, in step S2, the residence time of the gel microsphere in the crosslinked liquid is not more than 30min.
In the preparation method, in the step S3, the pH is adjusted after stirring for 1-3 hours at 20-40 ℃.
The nitrogen fertilizer synergist composition provided by the invention can be used for preparing nitrogen fertilizer.
The nitrogen fertilizer may be a solid nitrogen fertilizer or a liquid nitrogen fertilizer, including but not limited to compound fertilizer, solid water-soluble fertilizer, liquid fertilizer, and the like. The nitrogen fertilizer synergist composition provided by the invention can be applied to various different fertilizers, and has wide applicability.
The nitrogen fertilizer synergist composition provided by the invention can improve the utilization rate of nitrogen in soil or nitrogen fertilizer, namely can inhibit the conversion of ammonium nitrogen into nitrate nitrogen, and reduces the loss of nitrogen fertilizer in the form of nitrate nitrogen.
When the nitrogen fertilizer synergistic agent composition is applied, the nitrogen fertilizer synergistic agent composition can be added in the production process of nitrogen fertilizer or directly applied in the field and nitrogen fertilizer compounding.
When added during the production process of the nitrogen fertilizer, the nitrogen fertilizer is preferably added in drum granulation or high tower granulation;
The temperature of the drum granulation or the high tower granulation is not more than 150 ℃, and when the temperature exceeds 180 ℃, the retention time of the nitrogen fertilizer synergistic agent composition is less than or equal to 5min;
When the fertilizer synergist is directly used in the field, the fertilizer synergist composition is directly applied after being compounded with the nitrogen fertilizer;
Preferably, when the nitrogenous fertilizer is a granular fertilizer, the fertilizer is applied within 1-10 days after the compounding;
when the nitrogen fertilizer is liquid nitrogen fertilizer such as urea ammonium nitrate, liquid ammonia and the like, the fertilizer is applied within 1-10 days after the compound mixing
When the nitrogen fertilizer is a liquid nitrogen fertilizer such as a compound fertilizer containing multiple nutrient elements, a biological organic fertilizer and the like, the fertilizer is applied within 1-3 days after the compound mixing.
The invention has the following beneficial technical effects:
the nitrogen fertilizer synergist composition can effectively improve the stability of the nitrogen fertilizer synergist in the processes of fertilizer production, storage, transportation and application, realize the activity protection of the nitrogen fertilizer synergist, improve the agricultural effect of the nitrogen fertilizer synergist and reduce the emission of greenhouse gases generated by nitrogen fertilizer.
Detailed Description
The experimental methods used in the following examples are conventional methods unless otherwise specified.
Materials, reagents and the like used in the examples described below are commercially available unless otherwise specified.
Example 1 preparation of Nitrogen fertilizer synergist composition
The raw materials comprise the following components in parts by mass:
6.75 parts of sodium alginate, 1.5 parts of polyvinyl alcohol, 10 parts of calcium chloride, 5 parts of boric acid, 50 parts of plant extract tannic acid, 13 parts of inorganic salt ferric chloride, 6 parts of polyvinylpyrrolidone, 5 parts of nitrogen synergist DMPP and 2000 parts of water.
The preparation method comprises the following steps:
1) Dissolving polyvinyl alcohol in water, stirring at 80deg.C for 10 hr to obtain polyvinyl alcohol solution (solution A1)
2) Dissolving sodium alginate and nitrogen synergist DMPP in water to obtain water solution (solution A2)
3) Mixing the solution A1 with the solution A2 to obtain a mixed solution (solution B)
4) Dissolving crosslinking agent (calcium chloride) and acid (boric acid) in water to obtain crosslinking solution (solution C)
5) Pumping the solution B into a syringe, dripping the solution B into the solution C to form gel microspheres, and filtering, wherein the residence time of the gel microspheres in the solution C is not more than 30min.
6) Dissolving plant extract (tannic acid) in water to obtain water solution (solution D1)
7) Dissolving inorganic salt (ferric chloride) in water to obtain aqueous solution (solution D2)
8) Dissolving high molecular polymer (polyvinylpyrrolidone) in water (solution D3)
9) Mixing the solutions D1, D2 and D3 according to a mass ratio of 15:1:4, stirring for 2-3 hours at 20-40 ℃, adjusting the pH to 6.4 by using a sodium hydroxide solution, and standing for 1-2 hours to prepare a solution E;
10 Mixing the gel microspheres with the solution E, vibrating for 0.5-1 h, filtering and screening the unwrapped solution E, and freeze-drying to obtain the composition capable of improving the nitrogen synergist effect.
Application example 1, evaluation of the composition for improving Nitrogen synergist effect of the invention to improve stability of Nitrogen fertilizer synergist in fertilizer production Process
The composition prepared in example 1 was used as an example and untreated DMPP was used as a control. The temperatures (70 ℃, 125 ℃ and 200 ℃) and the heating time (5 min, 15min and 30 min) faced by the fertilizer production are simulated, and the degradation rate of DMPP under different conditions is respectively measured.
The DMPP content was determined by high performance liquid chromatography (HPLC, 1260 info II, usa). The column was ZORBAX C18.times. 4.6,30 ℃. Phosphoric acid solution (0.01M sodium dihydrogen phosphate) is taken as a mobile phase A, acetonitrile is taken as a mobile phase B, and the ratio of A to B is 7:3. The flow rate was 1ml/min and the temperature was 30 ℃. The injection volume was 20 μ. The detection wavelength was 224nm.
Wherein, DMPP represents degradation rate (%) of DMPP, and C T and C T0 are the content of DMPP in different fertilizer treatments after heating and before heating respectively.
TABLE 1 degradation rates of DMPP at different temperature treatments
The results in Table 1 show that the use of the composition of the present invention significantly reduces the DMPP degradation rate at 70℃and 125℃and significantly reduces the DMPP degradation rate at 200℃for a heating time of 5 minutes. The higher the temperature and longer the heating time, the less the protective effect of the composition on the nitrogen synergist. The prior art can meet the temperature environment of most fertilizer production processes below 125 ℃. Since the achievement of the composition of the present invention to enhance the stability of the nitrogen synergist is achieved mainly by maintaining the integrity of the calcium alginate-polyphenol hybrid material, it is recommended that the application temperature should not exceed 150 ℃ of the material and should not be applied to extrusion granulation.
Application example 2 evaluation of the composition with Nitrogen synergist effect of the invention to improve the stability of Nitrogen synergist in agricultural application
The composition prepared in example 1 was used as an example and untreated DMPP was used as a control.
Respectively adding different treatments into 10g of soil, carrying out static soil culture under the conditions that the soil water content is 60% of the soil pore water content and the temperature is 25 ℃, extracting DMPP in the soil for a specified time, and measuring the degradation rate of the DMPP in the soil. Two kinds of soil are selected, namely, damp soil from a Zhuzhou test station of China university of agriculture and black soil from Jilin pear science and technology institute, and the pH values of the soil are 7.9 and 5.6 respectively. DMPP content in soil was measured on days 3, 7, 14, 21 of cultivation, respectively.
The content measurement of DMPP is consistent with the test, and the residual rate (%) of the DMPP in the soil is used for indicating the effect of the composition of the invention on improving the degradation rate of the DMPP.
TABLE 2 residual percentage of DMPP in different soils (%)
The results in Table 2 show that the composition of the invention significantly improves the residual rate of DMPP in two soils with different pH values, and the influence of soil chemistry and biological processes on the degradation capacity of the DMPP is weakened by the composition of the invention. In order to further analyze the effect of the property of weakening the degradation capability of DMPP on practical agricultural application, the agricultural effect of the nitrogen synergist under the technical condition is measured through a static soil culture test, and the treatment is as follows:
The composition prepared in example 1 was used as an example, untreated DMPP was applied together with nitrogen fertilizer as a control example 1, and nitrogen fertilizer alone was added without any nitrogen fertilizer synergist as a control example 2.
Nitrogenous fertilizer is added into the soil around the curve in the fertilizer dosage of 100mg N/kg of soil, and the control example and the example are respectively added, so that the DMPP content in the control example and the DMPP content in the example are consistent. Accumulated emission of N 2 O in soil.
Wherein the nitrogen fertilizer synergist composition of the invention is used in an amount of 0.1% of the soil weight used in this example.
TABLE 3 Total emission of N 2 O in different treated soils (μg N kg -1)
Examples Comparative example 1 Comparative example 2
For 3 days 0 4.6±1.5 79.3±25.7
For 7 days 0 17.5±0.5 367±73.2
For 15 days 5.3±1.1 40.4±2.5 392.7±97.8
For 40 days 40.5±4.6 53.1±1.7 392.7±97.8
As the representative substance DMPP is a nitrification inhibitor, and is mainly used for inhibiting the nitrification process in agriculture, and reducing the loss of N 2 O in nitrogen fertilizer, therefore, N 2 O is used as a target index, whether the technology can enhance the agricultural effect of the nitrogen synergist is judged, and the result shows that compared with the traditional formula, the composition delays the occurrence time of N 2 O emission and reduces the total emission amount of N 2 O.

Claims (7)

1.一种氮肥增效剂组合物，由下述质量份的原料制成：1. A nitrogen fertilizer synergist composition, made from the following raw materials in parts by weight: 5~40份的有机高分子材料、1~5份的聚烯烃，5~35份的交联剂、2~10份的无机酸，50~100份的植物提取物、5~30份的无机盐、5~30份的高分子聚合物、5~30份的氮增效剂、1000~3000的份水；5-40 parts organic polymer materials, 1-5 parts polyolefin, 5-35 parts crosslinking agent, 2-10 parts inorganic acid, 50-100 parts plant extract, 5-30 parts inorganic salt, 5-30 parts polymer, 5-30 parts nitrogen synergist, and 1000-3000 parts water. 所述氮增效剂包括3,4-二甲基吡唑磷酸盐、3，4-二甲基吡唑、正丁基硫代磷酰三胺、双氰胺、硝基吡啶和氢醌；The nitrogen synergist includes 3,4-dimethylpyrazole phosphate, 3,4-dimethylpyrazole, n-butylthiophosphoric triamine, dicyandiamide, nitropyridine, and hydroquinone; 所述有机高分子材料为海藻酸钠；所述聚烯烃为聚乙烯醇或聚丙烯醇；所述交联剂为氯化钙或乳酸钙；所述无机酸为硼酸或磷酸；所述植物提取物为单宁酸、茶多酚和没食子酸中至少一种；所述无机盐为铁盐、铜盐、锌盐和锰盐中至少一种；所述高分子聚合物为聚乙烯吡咯烷酮、聚乙二醇、聚4-苯乙烯磺酸钠、聚二甲基二烯丙基氯化铵中至少一种；The organic polymer material is sodium alginate; the polyolefin is polyvinyl alcohol or polyacryl alcohol; the crosslinking agent is calcium chloride or calcium lactate; the inorganic acid is boric acid or phosphoric acid; the plant extract is at least one of tannic acid, tea polyphenols, and gallic acid; the inorganic salt is at least one of iron salt, copper salt, zinc salt, and manganese salt; the polymer is at least one of polyvinylpyrrolidone, polyethylene glycol, sodium poly-4-styrene sulfonate, and polydimethyldiallyl ammonium chloride. 所述氮肥增效剂组合物的制备方法包括如下步骤：The preparation method of the nitrogen fertilizer synergist composition includes the following steps: S1、将聚烯烃的溶液与有机高分子材料和氮增效剂的溶液混合，得到混合溶液Ⅰ；S1. Mix the polyolefin solution with the organic polymer material and nitrogen synergist solution to obtain mixed solution I; S2、将所述混合溶液Ⅰ泵入注射器中，滴入交联液中形成凝胶微球；S2. Pump the mixed solution I into a syringe and drip it into the cross-linking solution to form gel microspheres; 所述交联液为交联剂和无机酸的混合溶液；The crosslinking solution is a mixed solution of a crosslinking agent and an inorganic acid; S3、将植物提取物的溶液、无机盐的溶液和高分子聚合物的溶液混合，调整pH至5.7~6.7，静置得到混合溶液Ⅱ；S3. Mix the plant extract solution, inorganic salt solution, and polymer solution, adjust the pH to 5.7-6.7, and let stand to obtain mixed solution II; S4、将所述凝胶微球与所述混合溶液Ⅱ混合，经震荡、过筛、冷冻干燥即得。S4. The gel microspheres are mixed with the mixed solution II, and then shaken, sieved, and freeze-dried to obtain the final product. 2.权利要求1所述氮肥增效剂组合物的制备方法，包括如下步骤：2. The method for preparing the nitrogen fertilizer synergist composition according to claim 1, comprising the following steps: S1、将聚烯烃的溶液与有机高分子材料和氮增效剂的溶液混合，得到混合溶液Ⅰ；S1. Mix the polyolefin solution with the organic polymer material and nitrogen synergist solution to obtain mixed solution I; S2、将所述混合溶液Ⅰ泵入注射器中，滴入交联液中形成凝胶微球；S2. Pump the mixed solution I into a syringe and drip it into the cross-linking solution to form gel microspheres; 所述交联液为交联剂和无机酸的混合溶液；The crosslinking solution is a mixed solution of a crosslinking agent and an inorganic acid; S3、将植物提取物的溶液、无机盐的溶液和高分子聚合物的溶液混合，调整pH至5.7~6.7，静置得到混合溶液Ⅱ；S3. Mix the plant extract solution, inorganic salt solution, and polymer solution, adjust the pH to 5.7-6.7, and let stand to obtain mixed solution II; S4、将所述凝胶微球与所述混合溶液Ⅱ混合，经震荡、过筛、冷冻干燥即得。S4. The gel microspheres are mixed with the mixed solution II, and then shaken, sieved, and freeze-dried to obtain the final product. 3.根据权利要求2所述的制备方法，其特征在于：步骤S2中，所述凝胶微球在所述交联液中的停留时间不超过30min。3. The preparation method according to claim 2, characterized in that: in step S2, the residence time of the gel microspheres in the crosslinking solution does not exceed 30 min. 4.根据权利要求2或3所述的制备方法，其特征在于：步骤S3中，在20~40℃条件下搅拌1~3h后再调整pH。4. The preparation method according to claim 2 or 3, characterized in that: in step S3, the pH is adjusted after stirring at 20~40℃ for 1~3h. 5.权利要求1所述氮肥增效剂组合物在下述任一种中的应用：1）制备氮肥；2）提高土壤或氮肥中氮的利用率；3）植物种植。5. The use of the nitrogen fertilizer synergist composition of claim 1 in any of the following: 1) preparation of nitrogen fertilizer; 2) improvement of nitrogen utilization in soil or nitrogen fertilizer; 3) plant cultivation. 6.根据权利要求5所述的应用，其特征在于：在所述氮肥的转鼓造粒或高塔造粒中添加所述氮肥增效剂组合物；6. The application according to claim 5, characterized in that: the nitrogen fertilizer synergist composition is added to the rotary drum granulation or high tower granulation of the nitrogen fertilizer; 所述转鼓造粒或所述高塔造粒时的温度不超过150℃；当超过180℃时，所述氮肥增效剂组合物的留存时间≤5min。The temperature during the rotary drum granulation or the high tower granulation shall not exceed 150°C; when the temperature exceeds 180°C, the retention time of the nitrogen fertilizer synergist composition shall be ≤5 min. 7.根据权利要求6所述的应用，其特征在于：将所述氮肥增效剂组合物与所述氮肥复混后直接施用；7. The application according to claim 6, characterized in that: the nitrogen fertilizer synergist composition is mixed with the nitrogen fertilizer and then applied directly; 所述氮肥为颗粒肥时，复混后1~10天内施肥；When the nitrogen fertilizer is a granular fertilizer, apply it within 1 to 10 days after mixing. 所述氮肥为液体氮肥A时，复混后1~10天内施肥，所述氮肥为液体氮肥B时，复混后1~3天内施肥；When the nitrogen fertilizer is liquid nitrogen fertilizer A, apply the fertilizer within 1 to 10 days after mixing; when the nitrogen fertilizer is liquid nitrogen fertilizer B, apply the fertilizer within 1 to 3 days after mixing. 所述液体氮肥A为尿素硝铵、液氨；The liquid nitrogen fertilizer A is urea ammonium nitrate and liquid ammonia; 所述液体氮肥B为含多种营养元素的复合肥、生物有机肥。The liquid nitrogen fertilizer B is a compound fertilizer and bio-organic fertilizer containing multiple nutrients.
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