Preparation and application of stable slow-release slow-release fertilizer additive
By using a three-dimensional network structure formed by components such as sodium lignosulfonate and sodium carboxymethyl cellulose, combined with components such as dicyandiamide and hydroquinone, the problems of cost fluctuation and resource sustainability of traditional slow-release fertilizers are solved, achieving stable nutrient release and environmentally friendly fertilizer application.
Patent Information
- Application Number
- CN202510918027.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2026-01-02
AI Technical Summary
Traditional slow-release fertilizers rely on petroleum-based polymers and energy-intensive synthetic raw materials, resulting in large fluctuations in production costs, poor resource sustainability, and uncontrollable degradation rates of natural polymers, leading to nutrient bursts. Micronutrients are prone to precipitation in neutral soils, and biological enzyme preparations are deactivated in high-temperature processes, resulting in low utilization rates and an inability to exert their biological regulatory functions.
Using sodium lignosulfonate and sodium hydroxymethyl cellulose as the main framework, combined with dicyandiamide, hydroquinone, tetrahydroxyimidazoline and other components, a three-dimensional network structure is formed. By adjusting the pH value and biodegradable coating, it synergistically inhibits urease activity and nitrification, stabilizes the release of trace elements, and uses materials such as attapulgite to passivate heavy metals, thereby achieving biodegradation and slow release of nutrients.
It reduces production costs, improves nitrogen fertilizer utilization, reduces trace element precipitation, reduces pollution, enhances biodegradability, adapts to different soil types and crop needs, and achieves precise nutrient release and environmental friendliness.
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Figure CN121248352A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of long-acting fertilizer additives, and particularly relates to a preparation and application of a stable slow-release long-acting fertilizer additive. BACKGROUND
[0002] Traditional slow-release fertilizers rely on petroleum-based polymers, non-renewable minerals and high-energy consumption synthetic raw materials, resulting in large production cost fluctuations and poor resource sustainability, and the degradation rate of natural polymers is uncontrollable, leading to nutrient burst release, easy precipitation of trace elements in neutral soil, and low utilization rate; biological enzyme preparation: high inactivation rate in traditional high-temperature process, and unable to play the biological regulation function. SUMMARY
[0003] In view of the above problems, the application provides a preparation and application of a stable slow-release long-acting fertilizer additive to overcome the defects of the prior art.
[0004] To achieve the above purpose, the application provides the following technical scheme: a preparation of a stable slow-release long-acting fertilizer additive, which is composed of the following raw materials: 25-35 parts of sodium lignosulfonate, 21-31 parts of sodium hydroxymethyl cellulose, 11-21 parts of dicyandiamide, 3-8 parts of hydroquinone, 3-7 parts of cellulase, 8-15 parts of tetrahydroxy imidazoline, 3-8 parts of acetoxyhydroxamic acid, 3-8 parts of ammonium thiosulfate, 0.5-3 parts of auxiliary additive, 1-8 parts of synergist, and 1-5 parts of trace element agent.
[0005] Preferably, the auxiliary additive is composed of the following raw materials: 1-11 parts of potassium humate, 1-8 parts of sodium alginate, 1-5 parts of boric acid, 1-5 parts of zinc sulfate, 1-3 parts of polyaspartic acid, 1-5 parts of nano silicon dioxide, 1-11 parts of attapulgite, 1-11 parts of diatomite, 1-15 parts of bentonite, 1-8 parts of vermiculite powder, 1-8 parts of perlite, 1-11 parts of zeolite, and 1-8 parts of sepiolite.
[0006] Preferably, the auxiliary additive is composed of the following raw materials: 1-5 parts of chitosan, 1-5 parts of gamma-polyglutamic acid, 1-8 parts of calcium lignosulfonate, 1-5 parts of polyvinyl alcohol, 1-3 parts of polyacrylamide, 1-5 parts of starch graft copolymer, and 1-4 parts of alginate propylene glycol ester.
[0007] Preferably, the auxiliary additive is composed of the following raw materials: 1-5 parts of chitosan, 1-5 parts of gamma-polyglutamic acid, 1-8 parts of calcium lignosulfonate, 1-5 parts of polyvinyl alcohol, 1-3 parts of polyacrylamide, 1-5 parts of starch graft copolymer, and 1-4 parts of alginate propylene glycol ester.
[0008] A preparation method of a stable slow-release long-acting fertilizer additive preparation S1: raw material pretreatment: grind the sodium lignosulfonate and sodium hydroxymethyl cellulose to 80-120 mesh for use; S2: accurately weigh each raw material according to the formula; S3: add the pretreated sodium lignosulfonate and sodium hydroxymethyl cellulose into a mixing device; S4: heat the sodium lignosulfonate and sodium hydroxymethyl cellulose to 55-65℃, and stir at a speed of 210-510 rpm for 15-21 minutes; S5: sequentially add dicyandiamide, hydroquinone, tetrahydroxy imidazoline, and auxiliary additives, synergists, and trace element agents, maintain the temperature and stirring speed, and continue stirring for 15-21 minutes; S6: adjust the reaction system to pH 7.0-8.0 using a pH adjuster such as sulfuric acid or sodium hydroxide; S7: add cellulase, acetoxyhydroxamic acid, and ammonium thiosulfate, and continue stirring and mixing for 30 minutes; S8: perform drying treatment; the drying method is spray drying, and the spray drying is at an inlet air temperature of 151-221℃ and an outlet air temperature of 81-111℃; S9: after cooling to room temperature, regrind; adopt spray granulation: the pressure is 1-3 MPa, and the feeding speed is 51-111 L / h; S10: according to needs, perform coating treatment using sulfur coating: sulfur coating: sulfur melting temperature is 131-151℃, and spraying pressure is 1.2-1.5 MPa; S11: perform titanium ester coupling agent treatment: the amount of titanium ester coupling agent is 1.1-1.5% of the weight of the product; S12: package and store in a cool and dry place.
[0009] Preferably, the pH adjuster in S6 is sulfuric acid or sodium hydroxide, and the reaction conditions of the pH adjuster in S6 are microwave irradiation: set the power to 500-1500 W, and the irradiation time is 5-15 minutes.
[0010] Preferably, the mixing device in S1 is a double-screw conical mixer.
[0011] Application of a stable slow-release long-acting fertilizer additive preparation The stable slow-release long-acting fertilizer additive can be adapted to various fertilizer forms to form a product matrix covering different agricultural needs: Basic fertilizers: urea, compound fertilizer, and compound and mixed fertilizer; Functional fertilizers: organic fertilizer, biological fertilizer, slow-release and controlled-release fertilizer; and special fertilizers: water-soluble fertilizer, foliar fertilizer, and mixed fertilizer.
[0012] Stable slow-release long-acting fertilizer additives adapt to different fertilizer production processes: Direct mixing addition: physically mixed with base fertilizer particles as an additive.
[0013] Coating material: coated with sulfur coating, resin coating and other processes to wrap the fertilizer particles to achieve slow-release of nutrients; Organic-inorganic compound: compound with organic fertilizer raw materials to produce products with the high efficiency of organic fertilizer soil improvement and inorganic fertilizer; Compound with microbial agent: combined with probiotic agent to simultaneously achieve nutrient slow release and soil ecological improvement; Water-soluble fertilizer preparation: dissolved in water to form a liquid fertilizer suitable for precision fertilization.
[0014] Stable slow-release long-acting fertilizer additives can support full-scene fertilization operation and match different agricultural production modes: Base fertilizer: applied to the soil before sowing to provide basic nutrients for the entire growth period of crops; Topdressing: supplemental fertilization during the growth period of crops, such as rice tillering period and fruit expansion period of fruit trees; Seed fertilizer: applied with seeds to provide initial nutrients for seedlings; Leaf spraying: directly supplementing macronutrients and micronutrients through foliar fertilization; Irrigation fertilization: combined with drip irrigation, flushing and other methods to realize water and fertilizer integration; Soil spreading / striping / hole spreading: precise fertilization position according to crop row spacing and root distribution.
[0015] Compared with the prior art, the beneficial effects of the present application are: 1. Sodium lignosulfonate and sodium hydroxymethyl cellulose are used as the main skeleton to replace a large amount of petroleum-based resin, the raw material cost is reduced, and the biodegradation rate is increased, sodium lignosulfonate and sodium hydroxymethyl cellulose form a three-dimensional network structure, and have slow-release and biodegradability; 2. Dicyandiamide inhibits urease activity, and hydroquinone inhibits nitrification, and the two synergistically increase nitrogen utilization rate and reduce ammonia volatilization loss, tetrahydroxy imidazoline and acetic acid hydroxamic acid form a chelated microenvironment to stabilize Fe²⁺, Zn²⁺ and other trace elements (logK>12) under the condition of pH 7.0-8.0, and then reduce the precipitation of trace elements; 3. Biodegradable coating material (replaces traditional resin, reduces pollution in farmland, and the addition of attapulgite and zeolite has a passivation rate of Cd²⁺ in heavy metal contaminated soil of 75%, thereby alleviating and reducing soil ecological deterioration. BRIEF DESCRIPTION OF DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation of the present application.
[0017] In the drawings: Figure 1 Application diagram of the stable slow-release long-acting fertilizer additive of the present application. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application; based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.
[0019] Embodiment 1: A preparation method of a stable slow-release long-acting fertilizer additive, comprising the following steps: S1: raw material pretreatment: the sodium lignosulfonate and the sodium hydroxymethyl cellulose are respectively crushed to 80-120 mesh for use; S2: accurately weighing each raw material according to the formula, which is composed of the following raw materials: 25-35 parts of sodium lignosulfonate, 21 parts of sodium hydroxymethyl cellulose, 21 parts of dicyandiamide, 5 parts of hydroquinone, 4 parts of cellulase, 11 parts of tetrahydroxy imidazoline, 6 parts of acetic acid hydroxamic acid, 5 parts of ammonium thiosulfate, 2 parts of auxiliary additive, 4 parts of synergist, and 3 parts of trace element agent; S3: adding the pretreated sodium lignosulfonate and the sodium hydroxymethyl cellulose into a mixing device; S4: heating the sodium lignosulfonate and the sodium hydroxymethyl cellulose to 55℃, and stirring at a speed of 410 rpm for 15-21 minutes; S5: sequentially adding the dicyandiamide, the hydroquinone, the tetrahydroxy imidazoline, and the auxiliary additive, the synergist, and the trace element agent, maintaining the temperature and the stirring speed, and continuing to stir for 19 minutes; The auxiliary additive is composed of the following raw materials: 8 parts of potassium humate, 7 parts of sodium alginate, 2 parts of boric acid, 3 parts of zinc sulfate, 2 parts of polyaspartic acid, 3 parts of nano silicon dioxide, 4 parts of attapulgite, 5 parts of diatomite, 6 parts of bentonite, 7 parts of vermiculite powder, 7 parts of perlite, 5 parts of zeolite, and 4 parts of sepiolite;
[0020] The auxiliary additive is composed of the following raw materials: 3 parts of chitosan, 4 parts of γ-polyglutamic acid, 4 parts of calcium lignosulfonate, 3 parts of polyvinyl alcohol, 2 parts of polyacrylamide, 4 parts of starch graft copolymer, and 2 parts of alginate propylene glycol ester; The trace element agent is composed of the following raw materials: 2 parts of chitosan, 2 parts of γ-polyglutamic acid, 3 parts of calcium lignosulfonate, 2 parts of polyvinyl alcohol, 2 parts of polyacrylamide, 1 part of starch graft copolymer, and 3 parts of alginate propylene glycol ester; S6: Adjust the reaction system to pH 7.0 using a pH adjuster such as sulfuric acid or sodium hydroxide; S7: Add cellulase, acetic hydroxamic acid, and ammonium thiosulfate, and continue stirring for 30 minutes; S8: Perform drying treatment; the drying method is spray drying, and the spray drying is performed at an inlet air temperature of 182°C and an outlet air temperature of 99°C; S9: After cooling to room temperature, crush again; spray granulation is performed at a pressure of 2 MPa and a feed rate of 77 L / h; S10: As needed, perform coating treatment using sulfur coating: sulfur coating is performed at a sulfur melting temperature of 141°C and a spraying pressure of 1.35 MPa; S11: Perform titanate coupling agent treatment: the amount of titanate coupling agent is 1.4% of the weight of the product; S12: Package and store in a cool, dry place.
[0021] Example 2: A preparation method for a stable, slow-release, long-acting fertilizer additive, comprising the following steps: S1: Raw material pretreatment: crush sodium lignosulfonate and sodium hydroxymethyl cellulose to 80-120 mesh for use; S2: Accurately weigh each raw material according to the formula, which consists of: 25 parts of sodium lignosulfonate, 27 parts of sodium hydroxymethyl cellulose, 18 parts of dicyandiamide, 4 parts of hydroquinone, 6 parts of cellulase, 9 parts of tetrahydroxy imidazoline, 5 parts of acetic hydroxamic acid, 5 parts of ammonium thiosulfate, 1 part of auxiliary additive, 4 parts of synergist, and 4 parts of trace element agent; S3: Add the pretreated sodium lignosulfonate and sodium hydroxymethyl cellulose to a mixing device; S4: Heat the sodium lignosulfonate and sodium hydroxymethyl cellulose to 55-65°C, and stir at a speed of 210-510 rpm for 18 minutes; S5: Add dicyandiamide, hydroquinone, tetrahydroxy imidazoline, auxiliary additive, synergist, and trace element agent in sequence, maintain the temperature and stirring speed, and continue stirring for 17 minutes; The auxiliary additive consists of: 6 parts of potassium humate, 5 parts of sodium alginate, 4 parts of boric acid, 3 parts of zinc sulfate, 2 parts of polyaspartic acid, 2 parts of nano silicon dioxide, 5 parts of attapulgite, 6 parts of diatomite, 7 parts of bentonite, 6 parts of vermiculite powder, 5 parts of perlite, 4 parts of zeolite, and 4 parts of sepiolite;
[0022] The auxiliary additive consists of: 4 parts of chitosan, 4 parts of γ-polyglutamic acid, 5 parts of calcium lignosulfonate, 3 parts of polyvinyl alcohol, 2 parts of polyacrylamide, 2 parts of starch graft copolymer, and 2 parts of alginate propylene glycol ester; The trace element agent is composed of the following raw materials: 4 parts of chitosan, 2 parts of gamma-polyglutamic acid, 5 parts of calcium lignosulfonate, 3 parts of polyvinyl alcohol, 2 parts of polyacrylamide, 2 parts of starch graft copolymer, and 2 parts of propylene glycol alginate; S6: adjust the reaction system to pH 7.5 using a pH adjuster such as sulfuric acid or sodium hydroxide; S7: add cellulase, acetic acid hydroxamic acid, and ammonium thiosulfate, and continue stirring and mixing for 30 minutes; S8: perform drying treatment; the drying method is spray drying, and the spray drying has an inlet air temperature of 181°C and an outlet air temperature of 95°C; S9: after cooling to room temperature, perform crushing again; spray granulation is used with a pressure of 5 MPa and a feeding speed of 81 L / h; S10: according to needs, perform coating treatment using sulfur coating; sulfur coating is used with a sulfur melting temperature of 141°C and a spraying pressure of 1.35 MPa; S11: perform titanate coupling agent treatment; the amount of the titanate coupling agent is 1.3% of the weight of the product; S12: package and store in a cool and dry place.
[0023] Example 3: Application of a stable, slow-release, and long-acting fertilizer additive: The stable, slow-release, and long-acting fertilizer additive can be adapted to various fertilizer forms to form a product matrix covering different agricultural needs: Basic fertilizers: urea, compound fertilizer, and compound and mixed fertilizer (such as nitrogen, phosphorus, and potassium ternary compound fertilizer); Functional fertilizers: organic fertilizer, biological fertilizer (fertilizer containing microbial agents), slow-release and controlled-release fertilizer (controlling nutrient release through coating technology); special fertilizers: water-soluble fertilizer (soluble in water for drip irrigation / flushing), foliar fertilizer (special for foliar spraying), and mixed fertilizer (BB fertilizer, mixed with various granular fertilizers); The stable, slow-release, and long-acting fertilizer additive is adapted to different fertilizer production processes: Direct mixing and addition: as an additive, physically mixed with basic fertilizer particles (such as directly added during the production of compound fertilizer); Coating material: coating fertilizer particles through sulfur coating, resin coating, and other processes to achieve slow-release of nutrients (such as sulfur-coated urea); Organic-inorganic compounding: compounded with organic fertilizer raw materials to produce products with both the soil improvement of organic fertilizer and the high efficiency of inorganic fertilizer; Compound with microbial agents: combined with probiotic agents to simultaneously achieve nutrient slow release and soil ecological improvement.
[0024] Preparation of water-soluble fertilizer: dissolved in water to form a liquid fertilizer suitable for precision fertilization (such as drip irrigation in facility agriculture); Stable slow-release long-acting fertilizer additives can support full-scene fertilization operations and match different agricultural production modes: Base fertilizer: applied to the soil before sowing to provide basic nutrients for the entire growth period of crops (such as spreading before corn planting); Topdressing: supplemental fertilization during the growth period of crops, such as during the tillering period of rice and the fruit swelling period of fruit trees; Seed fertilizer: applied together with seeds to provide initial nutrients for seedlings (such as hole application when cotton is sown); Leaf spraying: direct supplementation of medium and trace elements through foliar fertilization (if trees lack calcium, spray); Irrigation fertilization: water and fertilizer integration through methods such as drip irrigation and flushing (such as facility vegetables); Soil spreading / strip application / hole application: precise fertilization position selection according to crop row spacing and root distribution.
[0025] The chicken cake is pure and soft, with a fresh and sweet taste, and a salty aftertaste. After sending it to friends and receiving feedback, the chicken cake processed in this step has a 98% approval rate after being eaten by friends Example 4: Application of a stable slow-release long-acting fertilizer additive: Stable slow-release long-acting fertilizer additives can support full-scene fertilization operations and match different agricultural production modes: Base fertilizer: applied to the soil before sowing to provide basic nutrients for the entire growth period of crops (such as spreading before corn planting); Topdressing: supplemental fertilization during the growth period of crops, such as during the tillering period of rice and the fruit swelling period of fruit trees; Seed fertilizer: applied together with seeds to provide initial nutrients for seedlings (such as hole application when cotton is sown); Leaf spraying: direct supplementation of medium and trace elements through foliar fertilization (if trees lack calcium, spray); Irrigation fertilization: water and fertilizer integration through methods such as drip irrigation and flushing (such as facility vegetables); Soil spreading / strip application / hole application: precise fertilization position selection according to crop row spacing and root distribution. Application of a stable slow-release long-acting fertilizer additive: Environmental adaptability: by adjusting parameters such as coating thickness and pH value, nutrient release can be accurately achieved in different soil and crop types, reducing environmental pollution (such as avoiding nitrogen leaching into groundwater); Cost optimization: for poor soil or economic crops, the addition ratio can be increased (such as 5.0% in organic fertilizer), and for conventional crops, the ratio can be reduced (such as 0.5% in nitrogen fertilizer), balancing effect and cost; Process compatibility: it can be used in traditional fertilizer production (such as drum granulation) and can also be adapted to new processes (such as spray fluidized bed granulation), supporting the technical upgrading of fertilizer enterprises; The application of a stable slow-release long-acting fertilizer additive preparation Suitable soil types Designed for different soil physical and chemical properties, improve the environmental adaptability of fertilizers According to the classification of acid-base: acid soil (pH <6.5), neutral soil (pH 6.5-7.5), alkaline soil (pH >7.5); According to the classification of texture: sandy soil (poor fertilizer retention, need to enhance slow release), loam (universal type), clay (improve air permeability and nutrient release); According to the classification of fertility: infertile soil (supplement trace elements and long-acting nutrients), fertile soil (control excessive release of nutrients), salinization soil (alleviate salt stress through chelating agent), heavy metal contaminated soil (combined with attapulgite and other components to passivate heavy metals).
[0026] Example 5 The application of a stable slow-release long-acting fertilizer additive preparation Suitable crop types Covering all types of crops such as food, economy, and horticulture, adapting to different growth cycle needs: Food crops: rice, wheat, corn, sorghum, millet, barley (improve yield and stress resistance);
[0027] Economic crops: cotton, rapeseed, peanut, soybean, sesame, sunflower (improve economic yield and quality); Fruit trees: apple, citrus, grape, pear, peach, banana, strawberry, kiwi (improve fruit taste and sugar content); Vegetables: tomato, cucumber, pepper, eggplant, Chinese cabbage, radish (shorten growth cycle and improve marketability); Other crops: tea, tobacco, flowers, medicinal materials, lawn, pasture, sugarcane, sugar beet (targeted optimization of special economic value).
[0028] Example 6 The application of a stable slow-release long-acting fertilizer additive preparation Addition ratio (for different fertilizer types) According to the characteristics of the fertilizer, accurately control the amount of addition, balance the fertilizer effect and cost: Nitrogen fertilizer: add 0.5-3.0% to inhibit urease activity, delay urea hydrolysis to ammonia, and reduce volatilization loss (such as urea, which can extend the fertilizer effect by 1-2 times); Compound fertilizer: add 1.0-4.0% to coordinate the release rate of nitrogen, phosphorus and potassium, avoid soil fixation of phosphorus and potassium, and improve nutrient utilization rate; Organic fertilizer: add 2.0-5.0% to promote the decomposition of organic matter, enhance soil microbial activity, and reduce the loss of organic fertilizer nutrients through slow-release carriers; Water-soluble fertilizer: add 0.3-2.0% to control nutrient dissolution rate, adapt to drip irrigation, sprinkler irrigation system, and avoid damage to crop roots by high concentration of salt; Leaf fertilizer: add 0.1-1.0% to optimize leaf absorption efficiency, extend nutrient adhesion time through high molecular film-forming material, and improve leaf spraying effect; Blended fertilizer: add 0.8-3.5% to adjust the release rhythm of different granular fertilizers, solve the problem of different release of each component in blended fertilizer.
Claims
1. A process for the preparation of a stabilizing slow release long lasting fertilizer additive characterized in that: The stable slow-release long-acting fertilizer additive is composed of the following raw materials: sodium lignosulfonate 25-35 parts, sodium hydroxymethyl cellulose 21-31 parts, dicyandiamide 11-21 parts, hydroquinone 3-8 parts, cellulase 3-7 parts, tetrahydroxy imidazoline 8-15 parts, acetic acid hydroxamic acid 3-8 parts, ammonium thiosulfate 3-8 parts, auxiliary additive 0.5-3 parts, synergist 1-8 parts, trace element agent 1-5 parts.
2. A stabilizing slow-release long-acting fertilizer additive according to claim 1, characterized by: The auxiliary additive is composed of the following raw materials: humic acid potassium 1-11 parts, sodium alginate 1-8 parts, boric acid 1-5 parts, zinc sulfate 1-5 parts, polyaspartic acid 1-3 parts, nano silicon dioxide 1-5 parts, attapulgite 1-11 parts, diatomite 1-11 parts, bentonite 1-15 parts, vermiculite powder 1-8 parts, perlite 1-8 parts, zeolite 1-11 parts, sepiolite 1-8 parts.
3. A stabilizing slow-release long-acting fertilizer additive according to claim 1, characterized by: The auxiliary additive is composed of the following raw materials: chitosan 1-5 parts, γ-polyglutamic acid 1-5 parts, calcium lignosulfonate 1-8 parts, polyvinyl alcohol 1-5 parts, polyacrylamide 1-3 parts, starch graft copolymer 1-5 parts, alginate propylene glycol ester 1-4 parts.
4. A stabilizing slow-release long-acting fertilizer additive according to claim 1, characterized by: The auxiliary additive is composed of the following raw materials: chitosan 1-5 parts, γ-polyglutamic acid 1-5 parts, calcium lignosulfonate 1-8 parts, polyvinyl alcohol 1-5 parts, polyacrylamide 1-3 parts, starch graft copolymer 1-5 parts, alginate propylene glycol ester 1-4 parts.
5. The preparation method of the stable slow-release long-acting fertilizer additive according to claims 1-4, characterized in that: S1: raw material pretreatment: sodium lignosulfonate and sodium hydroxymethyl cellulose are respectively crushed to 80-120 mesh for use; S2: accurately weigh each raw material according to the formula; S3: add the pretreated sodium lignosulfonate and sodium hydroxymethyl cellulose into the mixing equipment; S4: heat the sodium lignosulfonate and sodium hydroxymethyl cellulose to 55-65℃, and stir at a speed of 210-510 rpm for 15-21 minutes; S5: add dicyandiamide, hydroquinone, tetrahydroxy imidazoline, auxiliary additive, synergist and trace element agent in sequence, keep the temperature and stirring speed, and continue to stir for 15-21 minutes; S6: adjust the reaction system to pH 7.0-8.0 using pH regulator (such as sulfuric acid or sodium hydroxide); S7: add cellulase, acetic acid hydroxamic acid and ammonium thiosulfate, and continue to stir and mix for 30 minutes; S8: drying treatment; the drying method is spray drying, the inlet air temperature is 151-221℃, and the outlet air temperature is 81-111℃; S9: after cooling to room temperature, crush again; adopt spray granulation: the pressure is 1-3 MPa, and the feeding speed is 51-111 L / h; S10: according to the need, adopt sulfur coating for coating treatment: adopt sulfur coating: the sulfur melting temperature is 131-151℃, and the spraying pressure is 1.2-1.5 MPa; S11: titanium ester coupling agent treatment: the amount of titanium ester coupling agent is 1.1-1.5% of the weight of the product; S12: package and store in a cool and dry place.
6. A process for the preparation of a stabilizing slow release long lasting fertilizer additive as claimed in claim 5, wherein the process comprises of the steps of: The pH regulator in S6 is sulfuric acid or sodium hydroxide, and the reaction condition of the pH regulator in S6 is microwave irradiation: the power is set to 500-1500 W, and the irradiation time is 5-15 minutes.
7. A process for the preparation of a stabilizing slow release long lasting fertilizer additive as claimed in claim 6, wherein the process comprises of the steps of: The mixing device in S1 is a double-helical conical mixer.
8. Use of a stabilizing slow-release long-lasting fertilizer additive according to any one of claims 1-7, characterized in that: The stable slow-release long-acting fertilizer additive can adapt to various fertilizer forms and form a product matrix covering different agricultural needs: Basic fertilizers: urea, compound fertilizer, and compound and mixed fertilizer; Functional fertilizers: organic fertilizer, biological fertilizer, slow-release and controlled-release fertilizer; and special fertilizers: water-soluble fertilizer, foliar fertilizer, and blended fertilizer; The stable slow-release long-acting fertilizer additive adapts to different fertilizer production processes: Direct mixing and adding: as an additive, it is physically mixed with basic fertilizer particles; Coating material: by sulfur coating, resin coating, and other processes, the fertilizer particles are wrapped to achieve nutrient release; Organic-inorganic compound: combined with organic fertilizer raw materials, a product with the soil improvement of organic fertilizer and the high efficiency of inorganic fertilizer is produced; Combined with microbial agents: combined with probiotic agents, nutrient release and soil ecological improvement are simultaneously achieved; Water-soluble fertilizer preparation: after dissolving in water, a liquid fertilizer is prepared, which is suitable for precision fertilization; The stable slow-release long-acting fertilizer additive can support full-scene fertilization operations and match different agricultural production modes: Base fertilizer: applied to the soil before sowing to provide basic nutrients for the entire growth period of crops; Topdressing: supplemental fertilization during the growth period of crops, such as the tillering period of rice and the fruit expansion period of fruit trees; Seed fertilizer: applied with seeds to provide initial nutrients for seedlings; Foliar spraying: direct supplementation of medium and trace elements through foliar fertilizer; Irrigation fertilization: combined with drip irrigation, flushing, and other methods to realize water and fertilizer integration; Soil spreading, striping, and hole application: according to the row spacing and root distribution of crops, precise fertilization positions are selected.