A functional fertilizer containing an acid-enriching and oxygen-inducing compound biostimulant and its preparation method
By using a functional fertilizer containing urea, monoammonium phosphate, potassium sulfate, shell powder, oxygenating agents, and biostimulants, the problems of acidic soil improvement and rhizosphere hypoxia are solved, thereby increasing crop yield and improving soil stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHIKEFENG CHEM IND CO LTD
- Filing Date
- 2026-04-17
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies are insufficient to effectively improve acidic soils and solve the problem of rhizosphere oxygen deficiency in crops. Furthermore, long-term use carries the risk of heavy metal accumulation and soil pH imbalance, and cannot achieve increased crop yield and improved quality.
This functional fertilizer, which uses a combination of acid-enriching and oxygen-enhancing biostimulants, contains urea, monoammonium phosphate, potassium sulfate, shell powder, oxygenating agents, biostimulants, and trace elements. Through the synergistic effect of calcium peroxide suspension and microbial agents, it improves soil aeration and nutrient utilization.
It significantly improves the physical and chemical properties of acidic soils, alleviates root hypoxia, enhances nutrient utilization, promotes crop growth, increases crop yield and quality, maintains stable soil pH, and reduces the risk of heavy metals.
Smart Images
Figure SMS_1 
Figure SMS_2
Abstract
Description
Technical Field
[0001] This invention belongs to the field of agricultural fertilizer technology, specifically relating to a functional fertilizer containing an acid-releasing and oxygen-enhancing compound biostimulant and its preparation method. Background Technology
[0002] Soil acidification is a prominent problem in arable land, severely restricting its productivity. Soil acidification is the result of the long-term combined effects of natural factors and human activities, with the excessive application of chemical fertilizers being a major cause of rapid soil acidification. Soil acidification not only reduces the availability of soil nutrients but also exacerbates the toxicity of heavy metal ions such as aluminum and manganese, severely hindering crop growth. Simultaneously, acidic soils are often accompanied by compaction and poor aeration, creating an oxygen-deficient environment for crop roots. This leads to impaired aerobic respiration, reduced root vitality, and a chain reaction that exacerbates soil-borne diseases and reduces yields. Therefore, soil acidification has become one of the key issues restricting the sustainable development of agricultural production.
[0003] Currently, the main measures for improving acidic soils are: 1) Traditional methods such as applying lime and wood ash, although effective in improving soil conditions quickly, can lead to soil compaction, reduced soil microbial activity, and soil re-acidification with long-term use. 2) Fertilizers such as silicon-calcium-potassium-magnesium fertilizers, phosphogypsum, and alkaline residues can effectively neutralize soil acidity, but long-term use can increase the risk of heavy metal contamination in the soil. 3) Using organic materials (straw, decomposed manure, etc.) to improve acidic soils can increase soil organic matter and improve soil physical structure, but the improvement cycle is long, the effects are slow, and it requires multiple large-scale applications.
[0004] Chinese patent CN106146222A (application number: 201610645715.1) discloses an alkaline compound fertilizer and its preparation method, which is made by mixing and granulating urea, calcium magnesium phosphate, potassium sulfate and humic acid in a certain proportion, and has the functions of both nutrition and soil improvement. This alkaline compound fertilizer uses calcium magnesium phosphate as an acid-regulating factor. Although it can neutralize soil acidity and supplement phosphorus through its alkaline components (such as calcium and magnesium phosphates), long-term application may lead to excessive accumulation of calcium and magnesium ions and heavy metal enrichment in the soil. The humic acid added to the fertilizer is simply mixed with raw materials such as calcium magnesium phosphate, and is easily fixed or lost in the soil, which cannot effectively form a stable humus-soil colloidal complex and is difficult to enhance the soil's acid-base buffering capacity. Chinese patent CN109704828A (application number: 201910164849.5) discloses a balanced alkaline compound fertilizer and its preparation method. The raw materials include organic fertilizer, urea, diammonium phosphate, potassium carbonate, borate, magnesium sulfate, and brassinolide. It is intended to neutralize acidic soil, improve soil physicochemical properties, and increase fertilizer utilization. However, this balanced alkaline compound fertilizer only neutralizes soil acidity through the alkaline raw materials diammonium phosphate and potassium carbonate, resulting in low acid-regulating efficiency. Potassium carbonate has poor storage stability, easily absorbing moisture and carbon dioxide from the air to react and produce carbonic acid and potassium bicarbonate, releasing gas during the process. Long-term storage can lead to bag bloating and potential loss of the effective components of potassium carbonate. Furthermore, the organic fertilizer in the patent has a fermentation cycle of only 7-10 days, resulting in limited organic matter decomposition and weak chelation and buffering capacity, making it difficult to maintain soil acid-base balance in the long term. In addition, neither of these two patented fertilizers addresses the root zone hypoxia associated with acidic soils, thus failing to improve the microenvironment for crop root growth and fundamentally resolve the chain reaction caused by soil acidification, such as hindered crop growth and exacerbated soil-borne diseases.
[0005] The scientific application of both acid-controlling and oxygen-enhancing technologies in the field of new fertilizers to improve soil acidification, break the anaerobic environment in the rhizosphere of crops without increasing agricultural costs and labor, and increase crop yields is of great significance to the development of new fertilizers and even the entire agriculture in my country. Summary of the Invention
[0006] In order to overcome the shortcomings of the existing technology, this invention provides an acid-reducing and oxygen-enhancing compound biostimulant functional fertilizer and its preparation method. Its purpose is to effectively improve acidic soil, improve soil aeration, alleviate root hypoxia, activate soil nutrients, optimize the soil micro-ecological environment, and achieve increased crop yield and quality.
[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A functional fertilizer containing an acid-enriching and oxygen-enhancing compound biostimulant comprises the following raw materials in parts by weight: 25-40 parts urea, 15-30 parts monoammonium phosphate, 10-25 parts potassium sulfate, 2-10 parts shell powder, 5-15 parts oxygenating agent, 2.5-10 parts biostimulant, and 0.1-1 parts trace elements.
[0008] Furthermore, the shell powder is made from marine shells such as oyster shells and scallop shells, which are washed, calcined at 900℃, and then pulverized to 100-200 mesh.
[0009] Furthermore, the biostimulant comprises the following raw materials in parts by weight: Polyaspartic acid 1-4 parts, mineral-derived potassium humate 0.5-2 parts, microbial inoculant 0.5-1 part, seaweed active substances 1-4 parts, vitamin C 0.1-1 part.
[0010] Furthermore, the microbial agent includes Bacillus subtilis and Bacillus pilaris; the preservation number of Bacillus subtilis is CGMCC 1.12938, the preservation number of Bacillus pilaris is CGMCC 1.12148, and the effective viable count of the microbial agent is ≥2.0 × 10⁻⁶. 9 CFU / g; The active substance of the seaweed is fucoidan oligosaccharide, and the mass percentage of fucoidan oligosaccharide content is 90-99%.
[0011] Furthermore, the trace element is at least two of EDTA-Zn, EDTA-Cu, boric acid, and ammonium molybdate; the oxygenating agent is a calcium peroxide suspension.
[0012] Furthermore, the preparation steps of the oxygenating agent are as follows: quicklime and deionized water are added to a digester at a mass ratio of 1:3-1:5, and the mixture is stirred and digested at room temperature for 2-3 hours to obtain a calcium hydroxide suspension; 30% hydrogen peroxide solution is slowly added dropwise to the calcium hydroxide suspension, controlling the molar ratio of calcium hydroxide to hydrogen peroxide to be 1:1.2-1:1.5, and 2%-5% of a stabilizer by mass of calcium hydroxide is added at the same time. The reaction temperature is controlled at 15-25℃, the stirring rate is 300-500 r / min, and the reaction time is 2-3 hours to obtain a calcium peroxide suspension.
[0013] Furthermore, the stabilizer is a mixture of anhydrous magnesium sulfate and potassium pyrophosphate in a mass ratio of 1:1.
[0014] A method for preparing a functional fertilizer containing an acid-oxidizing compound biostimulant includes the following steps: S1: Prepare oxygenating agent, shell powder, biostimulant, and trace elements respectively; S2: Place urea, monoammonium phosphate, potassium sulfate, shell powder, biostimulant, and trace elements in a granulator and control the granulation temperature to 40-50℃. S3: The oxygenating agent is evenly sprayed onto the surface of the mixture in the granulator through a high-pressure spray system, controlling the spray pressure to 0.3-0.5MPa and the material residence time to 10-20 minutes to obtain wet granules; S4: Feed the wet granules into the dryer, control the drying temperature at 60-70℃, dry until the moisture content of the granules is ≤10%, and then cool them to room temperature in the cooler to obtain semi-finished granules; S5: The semi-finished granules are sieved through a 2-4mm sieve to obtain the final product, a functional fertilizer containing ketamine and oxygen-enhancing compound biostimulants.
[0015] The raw materials used in this invention are commercially available.
[0016] The biostimulant of this invention contains Bacillus subtilis and Bacillus pilaris. Bacillus pilaris secretes large amounts of extracellular polysaccharides, acting as a natural "glue" to bind dispersed soil particles into water-stable aggregates, making acidic soil loose, well-aerated, permeable, and retaining water and fertilizer, breaking up soil compaction. It also produces IAA (intracellular anaerobic acid), promoting root growth and better absorption of water and nutrients. Bacillus subtilis can perform biological nitrogen fixation, increasing nitrogen sources, and can also dissolve insoluble phosphorus in the soil, promoting phosphorus absorption by plants. This directly improves the problem of low nutrient availability commonly found in acidic soils. Furthermore, the polysaccharides and other substances it produces enhance the soil's water-holding capacity and stability. The synergistic effect of these two bacteria effectively improves the physical and chemical properties of the soil and promotes plant growth.
[0017] Beneficial effects 1. The pH value of the acid-releasing and oxygen-enhancing compound biostimulant functional fertilizer of this invention is 7.5-8.5, which is an alkaline fertilizer and is suitable for acidic soils with a pH value ≤5.5.
[0018] 2. The functional fertilizer containing acid-absorbing and oxygen-enhancing compound biostimulants provided by this invention also contains inorganic nutrients (nitrogen, phosphorus, potassium, and trace elements), organic matter, and microbial agents. It has comprehensive nutrients, reasonable nutrient ratio, and synergistic effects to improve the physical properties and biological activity of the soil, activate soil nutrients, and improve nutrient utilization.
[0019] 3. The shell powder used in this invention not only supplements elements such as calcium and magnesium, but also corrects the acidic environment of the soil, and the soil pH remains stable over time. The oxygenating agent (calcium peroxide) used in this invention has a simple preparation process and can be seamlessly integrated with subsequent fertilizer blending, granulation and other processes. Calcium peroxide releases oxygen and calcium hydroxide when it comes into contact with water, which can both improve acidic soil and alleviate root hypoxia in acidic soil. The biostimulant used in this invention can effectively promote the absorption, transport and use of nutrients by plants, improve fertilizer utilization, and its bioactive components help improve the physical and chemical properties of the soil, optimize the soil micro-ecological environment, and achieve increased crop yield and quality.
[0020] 4. The fertilizer preparation process of this invention is simple, the raw materials are readily available, the cost is controllable, and the nutrients are more comprehensive, resulting in significant economic, social and ecological benefits and broad prospects for promotion and application. Detailed Implementation
[0021] The technical solution of the present invention will be further described below with reference to specific embodiments, but it is not limited thereto.
[0022] Example 1 A functional fertilizer containing an acid-enriching and oxygen-enhancing compound biostimulant comprises the following raw materials in parts by weight: 25 parts urea, 15 parts monoammonium phosphate, 10 parts potassium sulfate, 2 parts shell powder, 5 parts oxygenating agent, 2.5 parts biostimulant, and 0.1 parts trace elements.
[0023] The shell powder is made from marine shells such as oyster shells and scallop shells, which are cleaned, calcined at 900℃, and then pulverized to 100-200 mesh.
[0024] The biostimulant comprises the following raw materials in parts by weight: 4 parts polyaspartic acid, 2 parts potassium humate, 1 part microbial agent, 4 parts seaweed active substances, and 1 part vitamin C.
[0025] The microbial inoculant includes Bacillus subtilis and Bacillus pilaris; the Bacillus subtilis preservation number is CGMCC 1.12938, and the Bacillus pilaris preservation number is CGMCC 1.12148, with an effective viable count ≥2.0 × 10⁻⁶. 9 CFU / g; The active substance of the seaweed is fucoidan oligosaccharide, and the mass percentage of fucoidan oligosaccharide content is 90-99%.
[0026] The trace element is at least two of EDTA-Zn, EDTA-Cu, boric acid, and ammonium molybdate; the oxygenating agent is a calcium peroxide suspension.
[0027] The preparation steps of the oxygenating agent are as follows: quicklime and deionized water are added to a digester at a mass ratio of 1:4, and the mixture is stirred and digested at room temperature for 2.5 hours to obtain a calcium hydroxide suspension; 30% hydrogen peroxide solution is slowly added dropwise to the calcium hydroxide suspension, controlling the molar ratio of calcium hydroxide to hydrogen peroxide to be 1:1.4, and 4% by mass of stabilizer of calcium hydroxide is added at the same time. The reaction temperature is controlled at 20℃, the stirring rate is 400 r / min, and the reaction time is 2.5 hours to obtain a calcium peroxide suspension.
[0028] The stabilizer is a mixture of anhydrous magnesium sulfate and potassium pyrophosphate in a mass ratio of 1:1.
[0029] A method for preparing a functional fertilizer containing an acid-oxidizing compound biostimulant includes the following steps: S1: Prepare oxygenating agent, shell powder, biostimulant, and trace elements respectively; S2: Place urea, monoammonium phosphate, potassium sulfate, shell powder, biostimulant, and trace elements in a granulator and control the granulation temperature to 40-50℃. S3: The oxygenating agent is evenly sprayed onto the surface of the mixture in the granulator through a high-pressure spray system, controlling the spray pressure to 0.3-0.5MPa and the material residence time to 10-20 minutes to obtain wet granules; S4: Feed the wet granules into the dryer, control the drying temperature at 60-70℃, dry until the moisture content of the granules is ≤10%, and then cool them to room temperature in the cooler to obtain semi-finished granules; S5: The semi-finished granules are sieved through a 2-4mm sieve to obtain the final product, a functional fertilizer containing ketamine and oxygen-enhancing compound biostimulants.
[0030] Example 2 A functional fertilizer containing a compound biostimulant and an acid-enriching agent comprises the following raw materials in parts by weight: 33 parts urea, 23 parts monoammonium phosphate, 15 parts potassium sulfate, 6 parts shell powder, 10 parts oxygenating agent, 6.5 parts biostimulant, and 0.5 parts trace elements.
[0031] The shell powder is made from marine shells such as oyster shells and scallop shells, which are cleaned, calcined at 900℃, and then pulverized to 100-200 mesh.
[0032] The biostimulant comprises the following raw materials in parts by weight: 2.5 parts polyaspartic acid, 1.2 parts potassium humate, 0.7 parts microbial inoculant, 2.5 parts seaweed active substances, and 0.5 parts vitamin C.
[0033] The microbial inoculant includes Bacillus subtilis and Bacillus pilaris; the Bacillus subtilis preservation number is CGMCC 1.12938, and the Bacillus pilaris preservation number is CGMCC 1.12148, with an effective viable count ≥2.0 × 10⁻⁶. 9 CFU / g; The active substance of the seaweed is fucoidan oligosaccharide, and the mass percentage of fucoidan oligosaccharide content is 90-99%.
[0034] The trace element is at least two of EDTA-Zn, EDTA-Cu, boric acid, and ammonium molybdate; the oxygenating agent is a calcium peroxide suspension.
[0035] The preparation steps of the oxygenating agent are as follows: quicklime and deionized water are added to a digester at a mass ratio of 1:4, and the mixture is stirred and digested at room temperature for 2.5 hours to obtain a calcium hydroxide suspension; 30% hydrogen peroxide solution is slowly added dropwise to the calcium hydroxide suspension, controlling the molar ratio of calcium hydroxide to hydrogen peroxide to be 1:1.4, and 4% by mass of stabilizer of calcium hydroxide is added at the same time. The reaction temperature is controlled at 20℃, the stirring rate is 400 r / min, and the reaction time is 2.5 hours to obtain a calcium peroxide suspension.
[0036] The stabilizer is a mixture of anhydrous magnesium sulfate and potassium pyrophosphate in a mass ratio of 1:1.
[0037] A method for preparing a functional fertilizer containing an acid-oxidizing compound biostimulant includes the following steps: S1: Prepare oxygenating agent, shell powder, biostimulant, and trace elements respectively; S2: Place urea, monoammonium phosphate, potassium sulfate, shell powder, biostimulant, and trace elements in a granulator and control the granulation temperature to 40-50℃. S3: The oxygenating agent is evenly sprayed onto the surface of the mixture in the granulator through a high-pressure spray system, controlling the spray pressure to 0.3-0.5MPa and the material residence time to 10-20 minutes to obtain wet granules; S4: Feed the wet granules into the dryer, control the drying temperature at 60-70℃, dry until the moisture content of the granules is ≤10%, and then cool them to room temperature in the cooler to obtain semi-finished granules; S5: The semi-finished granules are sieved through a 2-4mm sieve to obtain the final product, a functional fertilizer containing ketamine and oxygen-enhancing compound biostimulants.
[0038] Example 3 A functional fertilizer containing oxygen-enhancing compound biostimulant, comprising the following raw materials in parts by weight: 40 parts urea, 30 parts monoammonium phosphate, 25 parts potassium sulfate, 10 parts shell powder, 15 parts oxygenating agent, 10 parts biostimulant, and 1 part trace element.
[0039] The shell powder is made from marine shells such as oyster shells and scallop shells, which are cleaned, calcined at 900℃, and then pulverized to 100-200 mesh.
[0040] The biostimulant comprises the following raw materials in parts by weight: 1 part polyaspartic acid, 0.5 parts potassium humate, 0.5 parts microbial agent, 1 part seaweed active substance, and 0.1 parts vitamin C.
[0041] The microbial inoculant includes Bacillus subtilis and Bacillus pilaris; the Bacillus subtilis preservation number is CGMCC 1.12938, and the Bacillus pilaris preservation number is CGMCC 1.12148, with an effective viable count ≥2.0 × 10⁻⁶. 9 CFU / g; The active substance of the seaweed is fucoidan oligosaccharide, and the mass percentage of fucoidan oligosaccharide content is 90-99%.
[0042] The trace element is at least two of EDTA-Zn, EDTA-Cu, boric acid, and ammonium molybdate; the oxygenating agent is a calcium peroxide suspension.
[0043] The preparation steps of the oxygenating agent are as follows: quicklime and deionized water are added to a digester at a mass ratio of 1:4, and the mixture is stirred and digested at room temperature for 2.5 hours to obtain a calcium hydroxide suspension; 30% hydrogen peroxide solution is slowly added dropwise to the calcium hydroxide suspension, controlling the molar ratio of calcium hydroxide to hydrogen peroxide to be 1:1.4, and 4% by mass of stabilizer of calcium hydroxide is added at the same time. The reaction temperature is controlled at 20℃, the stirring rate is 400 r / min, and the reaction time is 2.5 hours to obtain a calcium peroxide suspension.
[0044] The stabilizer is a mixture of anhydrous magnesium sulfate and potassium pyrophosphate in a mass ratio of 1:1.
[0045] A method for preparing a functional fertilizer containing an acid-oxidizing compound biostimulant includes the following steps: S1: Prepare oxygenating agent, shell powder, biostimulant, and trace elements respectively; S2: Place urea, monoammonium phosphate, potassium sulfate, shell powder, biostimulant, and trace elements in a granulator and control the granulation temperature to 40-50℃. S3: The oxygenating agent is evenly sprayed onto the surface of the mixture in the granulator through a high-pressure spray system, controlling the spray pressure to 0.3-0.5MPa and the material residence time to 10-20 minutes to obtain wet granules; S4: Feed the wet granules into the dryer, control the drying temperature at 60-70℃, dry until the moisture content of the granules is ≤10%, and then cool them to room temperature in the cooler to obtain semi-finished granules; S5: The semi-finished granules are sieved through a 2-4mm sieve to obtain the final product, a functional fertilizer containing ketamine and oxygen-enhancing compound biostimulants.
[0046] Comparative Example 1 Compared with Example 3, this comparative example uses the same raw materials and steps as Example 3, except that only Bacillus subtilis is used in the microbial agent.
[0047] Comparative Example 2 Compared with Example 3, this comparative example uses only Bacillus pilaris in the microbial agent, while the other raw materials and steps are the same as in Example 3.
[0048] Comparative Example 3 This comparative example uses ordinary nitrogen, phosphorus, and potassium compound fertilizer (15-6-14).
[0049] Comparative Example 4 This comparative example uses ordinary alkaline compound fertilizer - calcium magnesium phosphate fertilizer, purchased from Jinan Mingxin Chemical Co., Ltd.
[0050] Performance testing Planting Trial The soil at the experimental site was acidic red soil in southern Jiangxi Province. The basic physical and chemical properties of the soil were: pH 4.5, organic matter 12.5 g / kg, available phosphorus 8.2 mg / kg, and available potassium 65 mg / kg.
[0051] Crop grown: Navel orange tree.
[0052] Field trial design: The experiment included 7 treatments: compound fertilizers prepared in Examples 1-3 and Comparative Examples 1-4. Each treatment was replicated 3 times, with 5 navel orange trees per replicate. Conventional fertilization and soil application of magnesium fertilizer were carried out by trench application (digging trenches approximately 30 cm deep and wide near the drip line of the tree canopy, and covering with soil after fertilization), applied twice a year, in late March and early July, using 1 kg / tree of fertilizer from each treatment group. Soil physicochemical properties and fruit quality were measured after fruit ripening. Statistical data are shown in Tables 1 and 2.
[0053] Table 1 Soil physicochemical properties of each treatment group As shown in Table 1, compared with the comparative example, the functional fertilizer of the present invention can effectively improve the physical and chemical properties of acidic soil, such as rapidly raising the soil pH to a suitable range (6.0-6.5); providing sufficient oxygen to the rhizosphere and promoting root development, indicating that the functional fertilizer of the present invention can effectively improve the physical and chemical properties of acidic soil.
[0054] Table 2. Characteristics and quality of navel oranges in each treatment group As shown in Table 2, the functional fertilizer of this invention exhibits significant advantages in acidic red soil, and can significantly improve the quality and yield of the fruit.
[0055] It should be noted that the above embodiments are merely some preferred embodiments of the present invention, and not all embodiments. Obviously, based on the above embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
Claims
1. A functional fertilizer containing an acid-releasing and oxygen-enhancing compound biostimulant, characterized in that, The raw materials include the following parts by weight: 25-40 parts urea, 15-30 parts monoammonium phosphate, 10-25 parts potassium sulfate, 2-10 parts shell powder, 5-15 parts oxygenating agent, 2.5-10 parts biostimulant, and 0.1-1 parts trace elements.
2. The functional fertilizer with acid-releasing and oxygen-enhancing compound biostimulant according to claim 1, characterized in that, The shell powder is made from marine shells such as oyster shells and scallop shells, which are cleaned, calcined at 900℃, and then pulverized to 100-200 mesh.
3. The functional fertilizer with acid-enhancing and oxygen-replenishing compound biostimulant according to claim 1, characterized in that, The biostimulant comprises the following raw materials in parts by weight: Polyaspartic acid 1-4 parts, mineral-derived potassium humate 0.5-2 parts, microbial inoculant 0.5-1 part, seaweed active substances 1-4 parts, vitamin C 0.1-1 part.
4. The functional fertilizer with acid-releasing and oxygen-enhancing compound biostimulant according to claim 3, characterized in that, The microbial inoculant includes Bacillus subtilis and Bacillus pilaris, with the Bacillus subtilis preservation number being CGMCC1.12938 and the Bacillus pilaris preservation number being CGMCC1.12148. The effective viable count of the microbial inoculant is ≥2.0 × 10⁻⁶. 9 CFU / g; The active substance of the seaweed is fucoidan oligosaccharide, and the mass percentage of fucoidan oligosaccharide content is 90-99%.
5. The functional fertilizer with acid-releasing and oxygen-enhancing compound biostimulant according to claim 1, characterized in that, The trace element is at least two of EDTA-Zn, EDTA-Cu, boric acid, and ammonium molybdate; the oxygenating agent is a calcium peroxide suspension.
6. The functional fertilizer with acid-releasing and oxygen-enhancing compound biostimulant according to claim 5, characterized in that, The preparation steps of the oxygenating agent are as follows: quicklime and deionized water are added to a digester at a mass ratio of 1:3-1:5, and the mixture is stirred and digested at room temperature for 2-3 hours to obtain a calcium hydroxide suspension; 30% hydrogen peroxide solution is slowly added dropwise to the calcium hydroxide suspension, controlling the molar ratio of calcium hydroxide to hydrogen peroxide to be 1:1.2-1:1.5, and 2%-5% of a stabilizer by mass of calcium hydroxide is added at the same time. The reaction temperature is controlled at 15-25℃, the stirring rate is 300-500 r / min, and the reaction time is 2-3 hours to obtain a calcium peroxide suspension.
7. The functional fertilizer with acid-enhancing and oxygen-inducing compound biostimulant according to claim 6, characterized in that, The stabilizer is a mixture of anhydrous magnesium sulfate and potassium pyrophosphate in a mass ratio of 1:
1.
8. A method for preparing a functional fertilizer containing an acid-oxidizing compound biostimulant as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Prepare oxygenating agent, shell powder, biostimulant, and trace elements respectively; S2: Place urea, monoammonium phosphate, potassium sulfate, shell powder, biostimulant, and trace elements in a granulator and control the granulation temperature to 40-50℃. S3: The oxygenating agent is evenly sprayed onto the surface of the mixture in the granulator through a high-pressure spray system, controlling the spray pressure to 0.3-0.5MPa and the material residence time to 10-20 minutes to obtain wet granules; S4: Feed the wet granules into the dryer, control the drying temperature at 60-70℃, dry until the moisture content of the granules is ≤10%, and then cool them to room temperature in the cooler to obtain semi-finished granules; S5: The semi-finished granules are sieved through a 2-4mm sieve to obtain the final product, a functional fertilizer containing ketamine and oxygen-enhancing compound biostimulants.