Silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer partner as well as preparation method and application thereof

Abstract

The invention discloses a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer partner as well as a preparation method and application thereof, and belongs to the technical field of agricultural fertilizers. In order to solve the problems of low utilization rate, poor crop root development, soil degradation and poor crop stress resistance of the existing synergistic chemical fertilizer product, the invention provides a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer partner, which is composed of a silicon-calcium-magnesium-sulfur matrix, a composite bio-enzyme, a beneficial microbial agent and an immobilization auxiliary agent. The fertilizer partner provided by the invention is cooperatively applied with a chemical fertilizer, can still increase the yield of crops by 7-10% under the condition of reducing the application amount of the chemical fertilizer by 20-30%, is suitable for agricultural production of food crops, commercial crops, vegetables, fruit trees and the like, and promotes agricultural sustainable development.

Description

Technical Field

[0001] This invention belongs to the field of agricultural fertilizer technology, and specifically relates to a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion, its preparation method, and its application. Background Technology

[0002] With the rapid development of modern agriculture, chemical fertilizers are increasingly widely used in agricultural production. Chemical fertilizers can quickly provide crops with the necessary nutrients, significantly increasing crop yields. However, the long-term and excessive use of chemical fertilizers has also brought a series of problems. On the one hand, the utilization rate of chemical fertilizers is generally low, with a large amount of nutrients lost through volatilization, leaching, and fixation, resulting not only in resource waste but also in environmental problems such as soil and water pollution. On the other hand, relying solely on chemical fertilizers leads to soil degradation problems such as decreased soil organic matter, structural damage, weakened water and fertilizer retention capacity, soil compaction, and acidification, which in turn affect crop growth and the quality of agricultural products.

[0003] Silicon, calcium, magnesium, and sulfur are essential micronutrients for crop growth. Silicon enhances crop resistance to pests and diseases, lodging resistance, and improves photosynthetic efficiency; calcium is an important component of cell walls, participating in cell division and growth; magnesium is a core element of chlorophyll, directly affecting photosynthesis; and sulfur is a component of proteins and enzymes, participating in various physiological metabolic processes. These elements not only directly participate in crop growth and development but also improve soil physicochemical properties and enhance soil water and fertilizer retention capacity.

[0004] Bioenzymes are a class of bioactive substances with catalytic functions that can promote the decomposition of organic matter, nutrient transformation, and improve the soil micro-ecological environment in the soil. Studies have shown that applying exogenous enzyme preparations can accelerate soil nutrient cycling, improve nutrient availability, promote root growth, and enhance crop absorption and utilization of nutrients.

[0005] Currently, most fertilizer synergistic products on the market focus on a single carrier or a single functional component. Exogenous enzyme preparations are easily deactivated by factors such as temperature, moisture, salinity, and pH during storage, transportation, and mixing with chemical fertilizers. Furthermore, they are easily leached and migrated in the soil, resulting in a short duration of action and low utilization efficiency. There is a lack of fertilizer synergistic products that can simultaneously exert micronutrient nutrition, soil improvement, and bio-synergistic functions, while also being convenient to use in combination with chemical fertilizers and cost-effective. Therefore, those skilled in the art desire to develop a fertilizer synergistic product that combines "carrier-based slow release / fertilizer and moisture retention" with "enzyme-catalyzed conversion enhancement" to promote sustainable agricultural development. Summary of the Invention

[0006] To address the problems of low utilization rate, poor crop root development, soil degradation, and poor crop resistance in existing enhancement fertilizer products, this invention provides a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion, its preparation method, and its application.

[0007] One of the objectives of this invention is to provide a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion, which, by weight, consists of 60-80 parts silicon-calcium-magnesium-sulfur matrix, 10-30 parts composite bio-enzyme, 5-10 parts beneficial microbial agent, and 3-8 parts immobilization adjuvant.

[0008] In a preferred embodiment of the present invention, the silicon-calcium-magnesium-sulfur matrix is ​​formed from particles or powders with a multi-level porous structure by calcining natural minerals or industrial by-products containing silicon, calcium, magnesium, and sulfur at high temperature.

[0009] In a preferred embodiment of the present invention, the silicon-containing natural mineral or industrial by-product is one or more of wollastonite, diatomite, fly ash, rice husk ash, microsilica powder, quartz powder, volcanic rock powder, or basalt powder; the calcium-containing natural mineral or industrial by-product is one or more of limestone, quicklime / hydrated lime, dolomite, gypsum / anhydrite, or desulfurized gypsum; the magnesium-containing natural mineral or industrial by-product is one or more of dolomite, magnesite, serpentine, magnesium oxide, or magnesium sulfate; and the sulfur-containing natural mineral or industrial by-product is one or more of gypsum / anhydrite, desulfurized gypsum, magnesium sulfate, or elemental sulfur.

[0010] In a preferred embodiment of the present invention, the specific surface area of ​​the silicon-calcium-magnesium-sulfur matrix is ​​5-100 m². 2 / g, with an average pore size of 2-200 nm.

[0011] In a preferred embodiment of the present invention, the composite bioenzyme is any combination of two or more of cellulase, protease, amylase, phytase, phosphatase, and chitinase.

[0012] In a preferred embodiment of the present invention, the beneficial microbial agent is one or more of nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and DNRA functional bacteria; the effective viable count in the beneficial microbial agent is ≥2×10⁻⁶. 9 CFU / g; The DNRA functional bacteria refer to bacteria that participate in the dissimilatory reduction of nitrate to ammonium and have the ability to recover easily lost NO3. - -N is converted to NH4 + -N.

[0013] In a preferred embodiment of the present invention, the immobilization aid is one or more of sodium alginate, chitosan, humate, polyvinyl alcohol, or trehalose.

[0014] The second objective of this invention is to provide a method for preparing the aforementioned fertilizer companion, the method comprising the following steps: S1: Crush, screen, calcine, cool and screen natural minerals or industrial by-products containing silicon, calcium, magnesium and sulfur to obtain a silicon-calcium-magnesium-sulfur porous matrix. S2: Mix the composite bio-enzyme with water, add the immobilization aid, and obtain the composite bio-enzyme solution; S3: Mix the porous matrix of silicon, calcium, magnesium and sulfur obtained in S1 with the composite bio-enzyme solution obtained in S2 evenly, and use stirring impregnation or vacuum impregnation to allow the composite bio-enzyme to enter the pores and be loaded; dry at 30-50℃ until the moisture content is ≤10%, and after drying and cooling to ≤40℃, inoculate with beneficial microbial agents and mix evenly to obtain the silicon, calcium, magnesium and sulfur matrix composite bio-enzyme fertilizer companion.

[0015] In a preferred embodiment of the present invention, the calcination temperature in S1 is 750-1000℃ and the time is 0.5-4h.

[0016] The third objective of this invention is to provide the application of the above-mentioned silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion in agricultural production. The fertilizer companion is mixed with chemical fertilizer at a weight ratio of (20-30):(80-70) and then applied to the soil in one go.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion, which, by weight, is composed of 60-80 parts of silicon-calcium-magnesium-sulfur matrix, 10-30 parts of composite bio-enzyme, 5-10 parts of beneficial microbial agent and 3-8 parts of immobilization aid.

[0018] Among them, silicon-calcium-magnesium-sulfur—as a matrix—is advantageous due to its specific surface area and average pore size (specific surface area of ​​5-100 μm). 2 (with an average pore size of 2-200 nm), it enhances the adsorption-slow release capacity of fertilizer nutrients and water, and provides attachment sites for complex biological enzymes / beneficial microorganisms. While providing the medium-quantity elements needed for crop growth, it also plays a role in fertilizer and moisture retention. Specifically, the silicon-calcium-magnesium-sulfur matrix is ​​preferably made from natural minerals or industrial by-products containing silicon, calcium, magnesium, and sulfur through high-temperature calcination. During the high-temperature calcination process, the crystal water, organic impurities, and some carbonate substances in the raw materials decompose and escape, forming micropores, mesopores, and some macropores of specific sizes inside the particles. On the one hand, it is conducive to the adsorption and slow release of water and nutrients such as nitrogen, phosphorus, and potassium. This structure allows more nutrients such as nitrogen, phosphorus, and potassium applied to the soil to be concentrated in the rhizosphere, reducing deep leaching and surface runoff losses. On the other hand, it provides attachment and habitat sites for compounded biological enzymes and beneficial microbial agents, enabling them to be slowly released in the soil and maintain high activity, which can promote soil nutrient transformation and improve nutrient availability. The synergistic effect of the two can maintain or increase crop yield while reducing the amount of chemical fertilizers by 20-30%.

[0019] Furthermore, since the composite bio-enzyme is loaded onto the porous surface of the silicon-calcium-magnesium-sulfur matrix (achieved through stirring impregnation or vacuum impregnation), the risk of inactivation and migration of exogenous enzymes during mixing, storage, and in the soil environment can be reduced, thus prolonging the duration of action. The synergistic effect of the adsorption-slow release of the silicon-calcium-magnesium-sulfur matrix and the enzymatic transformation of the composite bio-enzyme makes the nutrient release more aligned with the crop's nutrient requirements, resulting in a more stable synergistic effect compared to "only reducing fertilizer" or "only adding matrix / only adding enzyme" schemes.

[0020] The fertilizer companion provided by this invention, through its comprehensive effects of improving nutrient utilization, improving the soil environment, promoting root development, and enhancing stress resistance, increases crop yield by 7-10%, while simultaneously improving the quality of agricultural products and enhancing the plumpness and rhizosphere development of grain crops. This fertilizer companion, by improving fertilizer utilization, can reduce fertilizer application by 20-30%, thereby reducing environmental problems such as eutrophication and soil acidification caused by nutrient loss. The substrate material is derived from natural minerals or industrial by-products, achieving waste resource utilization. The bio-enzymes are biodegradable and will not cause environmental pollution, meeting the requirements of modern agriculture for reducing fertilizer use, increasing efficiency, and green development. Detailed Implementation

[0021] Those skilled in the art can refer to the content of this document and appropriately improve the process parameters to achieve the desired results. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments, and those skilled in the art can obviously make modifications or appropriate alterations and combinations to the methods and applications described herein without departing from the content and scope of this invention to implement and apply the technology of this invention.

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods, and the materials, reagents, methods, and instruments used are all conventional materials, reagents, methods, and instruments in the art, and can be obtained commercially by those skilled in the art.

[0023] Example 1: Preparation of a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer The silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion prepared in this embodiment consists of 67 parts by weight of silicon-calcium-magnesium-sulfur matrix, 20 parts of composite bio-enzyme, 10 parts of beneficial microbial agent and 3 parts of immobilization aid.

[0024] S1: Natural mineral raw materials containing silicon, calcium, magnesium and sulfur are crushed and screened to a particle size of 0.5-5 mm, calcined at 850℃ for 2 h, cooled and screened to obtain a silicon-calcium-magnesium-sulfur porous matrix. S2: Cellulase, protease and phytase in equal mass ratio (1:1:1) are combined and deionized water is added to prepare a 12% composite biological enzyme; immobilization aid (sodium alginate) is added to obtain a composite biological enzyme solution. S3: Mix the porous matrix of silicon, calcium, magnesium, and sulfur obtained in S1 with the composite bio-enzyme solution obtained in S2 by stirring for 10-60 min until homogeneous. Impregnate the composite bio-enzyme into the pores using stirring or vacuum impregnation (impregnate under -0.06~-0.09 MPa vacuum for 5-30 min). Dry at 30-50℃ until the moisture content is ≤10%. After drying and cooling to ≤40℃, inoculate with beneficial microbial agents (effective viable count ≥2×10⁻⁶). 9 CFU / g) and mix well to obtain a silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion.

[0025] Example 2: Application of silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer on maize crops The effect of the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer prepared in Example 1 on maize yield was investigated by field experiment. The experiment was conducted at Shuguang Farm, Huanan County, Heilongjiang Province, from May to October 2025.

[0026] The accumulated temperature ≥10℃ during the growing season in 2025 was 2956.8℃, 183.5℃ higher than the same period in previous years; the frost-free period was 138 days, 4 days less than the same period in previous years; the average temperature from May to September was 19.3℃, 2.0℃ higher than the same period in previous years; the total precipitation was 568.4 mm, 121.8 mm more than the same period in previous years; overall meteorological conditions met the needs of crop growth, classifying it as a normal to bumper year. The average temperature in May was 15.2℃, 2.2℃ higher than the same period in previous years; the total precipitation was 42.3 mm, 7.7 mm less than the same period in previous years; crops emerged normally and uniformly; the average temperature in June was 20.3℃, 1.9℃ higher than the same period in previous years; the total precipitation was 81.6 mm, 1.2 mm less than the same period in previous years. The average temperature in early June was 16.8℃, 0.2℃ lower than the historical average for the same period. The low temperature had a minor impact and did not significantly hinder crop growth. Temperatures rose steadily in the middle and late parts of June, completely offsetting the earlier slight drop in temperature, and overall meteorological conditions were sufficient for normal crop growth. The average temperature in July was 23.1℃, 1.5℃ higher than the historical average for the same period; total precipitation was 195.7 mm, 65.6 mm more than the historical average for the same period. The average temperature in August was 22.2℃, 2.1℃ higher than the historical average for the same period; total precipitation was 218.4 mm, 95.8 mm more than the historical average for the same period. The above-average rainfall in July and August caused slight waterlogging in some low-lying farmland, but timely drainage did not affect overall crop growth. The average temperature in September was 16.5℃, which was 3.0℃ higher than the same period in previous years; the total precipitation was 42.4 mm, which was 21.3 mm less than the same period in previous years; the higher temperature, more sunshine, and moderate precipitation were extremely favorable for crop ripening and harvesting.

[0027] The soil type at the experimental site was alkaline soil with an organic matter content of 3.1%, available nitrogen of 125 mg / kg, available phosphorus of 38.7 mg / kg, available potassium of 163 mg / kg, and a pH of 5.6. The previous crop was soybean, and the land was prepared and ridged in autumn with a uniform slope. The planting density was 80,000 plants / hectare. Mechanical sowing was carried out on May 2. On June 6, post-emergence foliar weeding was carried out with 2000 mL of 28% nicotinamide + 900 mL of 20% mesotrione per hectare. On June 27, 1000 mL of 18.7% propiconazole + 1000 g of potassium dihydrogen phosphate + 500 g of ethephon + 500 g of amino acid foliar fertilizer per hectare was applied. On July 2, 500 mL of 2.5% lambda-cyhalothrin + 300 mL of emamectin benzoate was sprayed.

[0028] A large-area comparison was adopted, with each marked plot being 4.5 mu (approximately 0.23 hectares). The application of all other fertilizers strictly followed the requirements for high-yield maize cultivation techniques, and each plot was identical. Other management measures were consistent with field production. Before harvest, 10 representative plants were randomly selected from points within the marked plots with similar numbers of harvested plants for testing.

[0029] The following treatments were set up: Treatment T1 reduced fertilization by 25%, i.e., conventional fertilization of 13.8 kg / mu + 4.6 kg / mu of silicon-calcium-magnesium-sulfur matrix compound bio-enzyme fertilizer prepared in Example 1; Treatment CK was conventional fertilization of 1.7 kg urea, 10 kg diammonium phosphate, and 6.7 kg potassium fertilizer per mu, with a total fertilization of 18.4 kg / mu, applied as a single seed fertilizer.

[0030] The results are shown in Table 1. Treatment T1 exhibited a comprehensive promoting effect on maize variety K6791, showing significant improvements in multiple aspects, including vegetative growth, reproductive development, and yield formation. In particular, it significantly increased the number of kernels per plant by 20.8% by shortening the tip barrenness and increasing the number of kernels per row. Therefore, the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer provided by this invention can promote the vegetative growth and reproductive development of maize, as well as increase maize yield, providing new technical support for the improvement of high-yield maize cultivation technology and food security.

[0031] Table 1

[0032] Example 3: Application of silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer on soybean crops The effects of the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer prepared in Example 1 on soybean yield were investigated using a field trial. The trial was conducted at Shuguang Farm, Huanan County, Heilongjiang Province, from May to October 2025. The preceding crop was maize, with autumn tillage and ridging, and a uniform slope. The designed density was 280,000-300,000 plants / hectare. Mechanical sowing was carried out on May 12th, and post-emergence foliar weeding was applied on June 8th using 2250 g of 35% quinalazine + 800 mL of 24% clethodim + 900 mL of bentazon per hectare. On July 9th, pest control was carried out per hectare using 150 mL of 19.4% abamectin + 250 mL of high-efficiency cyhalothrin + 100 g of boron sulfadiazine; disease control was carried out using 500 mL of chlorpyrifos + 250 mL of pyraclostrobin + 250 mL of flutriafol; foliar fertilizer was applied per hectare using 500 g of expanded potassium dihydrogen phosphate + 80 mL of Shuofeng 481 foliar fertilizer.

[0033] A large-area comparison was conducted, with each marked plot measuring 1.2 mu (approximately 0.8 acres). The application of all fertilizers strictly followed the high-yield soybean cultivation techniques, ensuring complete consistency across all plots. Other management practices were consistent with field production. Before harvest, 10 representative plants were randomly selected from points within the marked plots with similar plant numbers for testing. The following treatments were set up: Treatment T1 reduced fertilization by 25%, i.e., conventional fertilization of 13.8 kg / mu + 4.6 kg / mu of silicon-calcium-magnesium-sulfur matrix compound bio-enzyme fertilizer prepared in Example 1; Treatment CK was conventional fertilization of 1.7 kg urea, 10 kg diammonium phosphate, and 6.7 kg potassium fertilizer per mu, with a total fertilization of 18.4 kg / mu, applied as a single seed fertilizer.

[0034] The results are shown in Table 2. Treatment T1 showed a comprehensive promoting effect on soybean variety Kendou 94, with significant improvements in multiple aspects, including plant architecture optimization, yield component improvement, and final yield increase. In particular, it significantly increased the yield per hectare by 8.2% by increasing the number of pods and grains per plant. Therefore, the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer provided by this invention can promote soybean plant architecture optimization and increase soybean yield, providing new technical support for the improvement of high-yield soybean cultivation technology and food security.

[0035] Table 2

[0036] To further verify the synergistic effect of the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion provided by the present invention, the following control treatment was set up in this embodiment (taking a 25% reduction in fertilization as an example): The effect of the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion prepared in Example 1 on soybean yield was investigated by field experiment. The test site was Shuguang Farm, Huanan County, Heilongjiang Province, and the field experiment was conducted from May 2025 to October 2025.

[0037] Previous crop: Corn. Autumn land preparation and ridging were adopted, with a uniform slope. The designed density was 280,000-300,000 plants / hectare. Mechanical sowing was carried out on May 12th. Post-emergence foliar weeding was applied on June 8th using 2250 g of 35% cypermethrin + 800 mL of 24% clethodim + 900 mL of bentazon per hectare. On July 9th, pest control was carried out using 150 mL of 19.4% abamectin + 250 mL of lambda-cyhalothrin + 100 g of boron per hectare; disease control was carried out using 500 mL of pyraclostrobin + 250 mL of pyraclostrobin + 250 mL of flutriafol per hectare; foliar fertilizer was applied using 500 g of expanded potassium dihydrogen phosphate + 80 mL of Shuofeng 481 foliar fertilizer per hectare.

[0038] A large-area comparison was adopted, with each marked plot being 1.2 mu (approximately 0.8 acres). The application of all other fertilizers strictly followed the requirements for high-yield soybean cultivation techniques, and each plot was identical. Other management measures were consistent with field production. Before harvest, 10 representative plants were randomly selected from points within the marked plots with similar numbers of harvested plants for testing.

[0039] Configure the following settings: The control group received conventional fertilization; The CK1 treatment group reduced fertilization by 25% (without adding fertilizer additive); The T1 treatment group reduced fertilization by 25% and lacked a compound biological enzyme fertilizer companion. The T2 treatment group is a fertilizer companion that reduces fertilization by 25% and lacks silicon, calcium, magnesium and sulfur matrix. The T3 treatment group is a fertilizer companion that reduces fertilization by 25% and lacks beneficial microbial agents; The T4 treatment group was a 25% reduction in fertilization, plus the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion prepared in Example 1.

[0040] The results are shown in Table 3. Under the condition of reducing fertilization by 25%, CK1 (reduced fertilization only) showed a certain degree of yield reduction compared to CK, indicating that simply reducing fertilization will affect soybean yield. The T1 and T2 treatment groups can improve the crop growth and yield components to some extent, but the improvement is limited. In contrast, the T3 treatment group, while maintaining a basically consistent number of soybean plants, significantly improved key yield components such as the number of pods per plant, the number of grains per plant, and grain weight, enabling it to reach or exceed the level of conventional fertilization under reduced fertilization conditions. This indicates a significant synergistic effect between the adsorption and slow release of the porous matrix and the continuous transformation promotion of the immobilized complex enzyme, demonstrating the synergistic effect and unpredictable technical effect of this invention. The T4 treatment group further improved upon the T3 treatment group, indicating that the compound beneficial microbial agent can further enhance the synergistic effect.

[0041] In summary, the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion provided by this invention can stably achieve fertilizer reduction and efficiency enhancement through the synergistic effect between its components, and has strong application value and promotion prospects.

[0042] Table 3

[0043] The specific embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion, characterized in that, The silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion, by weight, consists of 60-80 parts silicon-calcium-magnesium-sulfur matrix, 10-30 parts composite bio-enzyme, 5-10 parts beneficial microbial agent and 3-8 parts immobilization aid.

2. The fertilizer companion according to claim 1, characterized in that, The silicon-calcium-magnesium-sulfur matrix is ​​formed from particles or powders with a multi-level porous structure by calcining natural minerals or industrial by-products containing silicon, calcium, magnesium, and sulfur at high temperatures.

3. The fertilizer companion according to claim 2, characterized in that, The silicon-containing natural mineral or industrial by-product is one or more of wollastonite, diatomite, fly ash, rice husk ash, microsilica powder, quartz powder, volcanic rock powder, or basalt powder; the calcium-containing natural mineral or industrial by-product is one or more of limestone, quicklime / hydrated lime, dolomite, gypsum / anhydrite, or desulfurized gypsum; the magnesium-containing natural mineral or industrial by-product is one or more of dolomite, magnesite, serpentine, magnesium oxide, or magnesium sulfate; the sulfur-containing natural mineral or industrial by-product is one or more of gypsum / anhydrite, desulfurized gypsum, magnesium sulfate, or elemental sulfur.

4. The fertilizer companion according to claim 2, characterized in that, The specific surface area of ​​the silicon-calcium-magnesium-sulfur matrix is ​​5-100 m². 2 / g, with an average pore size of 2-200 nm.

5. The fertilizer companion according to claim 1, characterized in that, The composite bioenzyme is any combination of two or more of cellulase, protease, amylase, phytase, phosphatase, and chitinase.

6. The fertilizer companion according to claim 1, characterized in that, The beneficial microbial agent is one or more of nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and DNRA functional bacteria; the effective viable count of the beneficial microbial agent is ≥2×10⁻⁶. 9 CFU / g; The DNRA functional bacteria refer to bacteria that participate in the dissimilatory reduction of nitrate to ammonium and have the ability to recover easily lost NO3. - -N is converted to NH4 + -N.

7. The fertilizer companion according to claim 1, characterized in that, The immobilization aid is one or more of sodium alginate, chitosan, humate, polyvinyl alcohol, or trehalose.

8. The method for preparing the fertilizer companion according to any one of claims 1 to 7, characterized in that, The preparation method includes the following steps: S1: Crush, screen, calcine, cool and screen natural minerals or industrial by-products containing silicon, calcium, magnesium and sulfur to obtain a silicon-calcium-magnesium-sulfur porous matrix. S2: Mix the composite bio-enzyme with water, add the immobilization aid, and obtain the composite bio-enzyme solution; S3: Mix the porous matrix of silicon, calcium, magnesium and sulfur obtained in S1 with the composite bio-enzyme solution obtained in S2 evenly, and use stirring impregnation or vacuum impregnation to allow the composite bio-enzyme to enter the pores and be loaded; dry at 30-50℃ until the moisture content is ≤10%, and after drying and cooling to ≤40℃, inoculate with beneficial microbial agents and mix evenly to obtain the silicon, calcium, magnesium and sulfur matrix composite bio-enzyme fertilizer companion.

9. The preparation method according to claim 8, characterized in that, The calcination temperature described in S1 is 750-1000℃ and the time is 0.5-4 h.

10. The application of the silicon-calcium-magnesium-sulfur matrix composite bio-enzyme fertilizer companion according to any one of claims 1 to 7 in agricultural production, characterized in that, The fertilizer companion is mixed with the chemical fertilizer at a weight ratio of (20-30):(80-70) and then applied to the soil in one go.

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