Fungicide compound fertilizer for sand land and preparation method of fungicide compound fertilizer

Abstract

The invention provides a microbial agent compound fertilizer for sandy land and a preparation method thereof, and relates to the technical field of compound fertilizers. The invention relates to a microbial inoculum compound fertilizer for sandy land. The soil conditioner is prepared from the following raw materials in parts by mass: 40 to 60 parts of compost, 0.3 to 0.8 part of nitrogen-fixing bacteria, 0.3 to 0.8 part of phosphate solubilizing bacteria, 0.3 to 0.8 part of potassium bacteria, 8 to 12 parts of charcoal, 8 to 12 parts of zeolite, 9 to 13 parts of perlite, 4 to 6 parts of vermiculite, 1 to 3 parts of seaweed extract, 2 to 4 parts of humic acid, 1 to 7 parts of waste cellulose nanocrystals, 30 to 40 parts of insect debris, 0.3 to 3 parts of nano carbon dots, 3 to 9 parts of lime and 8 to 15 parts of wood fiber. The compound fertilizer disclosed by the invention not only is rich in various necessary nutrient elements, but also has a good slow release effect and a good soil improvement function, can effectively improve soil fertility and promote plant growth through the action of various biological strains, and also has the characteristics of environmental protection and no pollution by utilizing the waste cellulose nanocrystals and the insect remains.

Description

Technical Field

[0001] The present invention relates to the technical field of compound fertilizers, in particular to a bacterial agent compound fertilizer for sandy soil and a preparation method thereof. Background Art

[0002] Sandy soil refers to soil composed primarily of sand particles. This type of soil has large particles and high porosity, resulting in good water permeability and aeration, but poor water and nutrient retention. Sandy soil is characterized by particles primarily ranging in diameter from 0.05 to 2 mm. These large pores allow water to penetrate easily, but this also leads to increased water and nutrient loss. Large pores allow air to easily enter the soil, facilitating root respiration, but this also leads to increased water loss, making it difficult to maintain moisture. Nutrients in fertilizers are easily lost with the water, making them difficult for plants to absorb over time. These challenges necessitate fertilization. Sandy soil naturally contains low levels of organic matter and nutrients, so fertilization can supplement the nutrients needed for crop growth. Organic fertilizers can improve soil structure, enhance water retention, and reduce water loss. Organic fertilizers not only provide nutrients but also increase the soil's organic matter content and improve its physical structure. Applying slow-release or organic fertilizers can mitigate this rapid nutrient loss, allowing plants to absorb them more sustainably.

[0003] There are many types of fertilizers available, such as chemical fertilizers such as nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, and compound fertilizer. However, long-term use of such fertilizers will lead to soil acidification or alkalization, which may cause water pollution (such as eutrophication), destroy soil structure, and reduce soil microbial activity. Conventional organic fertilizers include compost, green manure, stable manure, livestock manure, etc. However, the nutrients are unstable, released slowly, and the effect is slow. Large-scale use may bring pathogens and weed seeds, and the storage and transportation costs are high, and the odor is heavy. Microbial fertilizers such as nitrogen-fixing fertilizers, phosphorus-dissolving fertilizers, and potassium-dissolving fertilizers have high requirements for storage conditions (temperature, humidity, etc.). The effect is greatly affected by environmental conditions and the effect is unstable.

[0004] Therefore, the present invention proposes a microbial agent compound fertilizer for sandy soil and a preparation method thereof to solve the above-mentioned problems. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, the present invention provides a microbial agent compound fertilizer for sandy soil and a preparation method thereof, which solves the problem that the use of existing fertilizers makes the soil easily degraded and the nutrition is uneven.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A microbial agent compound fertilizer for sandy soil, comprising the following raw materials in parts by weight:

[0009] 40-60 parts of compost, 0.3-0.8 parts of nitrogen-fixing bacteria, 0.3-0.8 parts of phosphate-solubilizing bacteria, 0.3-0.8 parts of potassium-solubilizing bacteria, 8-12 parts of biochar, 8-12 parts of zeolite, 9-13 parts of perlite, 4-6 parts of vermiculite, 1-3 parts of seaweed extract, 2-4 parts of humic acid, 1-7 parts of waste cellulose nanocrystals, 30-40 parts of insect remains, 0.3-3 parts of nanocarbon dots, 3-9 parts of lime, and 8-15 parts of wood fiber.

[0010] Preferably, it is prepared from the following raw materials in parts by weight:

[0011] 40 parts of compost, 0.3 parts of nitrogen-fixing bacteria, 0.3 parts of phosphate-solubilizing bacteria, 0.3 parts of potassium-solubilizing bacteria, 8 parts of biochar, 8 parts of zeolite, 9 parts of perlite, 4 parts of vermiculite, 1 part of seaweed extract, 2 parts of humic acid, 1 part of waste cellulose nanocrystals, 30 parts of insect remains, 0.3 parts of nanocarbon dots, 3 parts of lime, and 8 parts of wood fiber.

[0012] Preferably, it is prepared from the following raw materials in parts by weight:

[0013] 50 parts of compost, 0.6 parts of nitrogen-fixing bacteria, 0.6 parts of phosphate-solubilizing bacteria, 0.6 parts of potassium-solubilizing bacteria, 10 parts of biochar, 10 parts of zeolite, 11 parts of perlite, 5 parts of vermiculite, 2 parts of seaweed extract, 5 parts of humic acid, 4 parts of waste cellulose nanocrystals, 35 parts of insect remains, 2 parts of nanocarbon dots, 6 parts of lime, and 12 parts of wood fiber.

[0014] Preferably, it is prepared from the following raw materials in parts by weight:

[0015] 60 parts of compost, 0.8 parts of nitrogen-fixing bacteria, 0.8 parts of phosphate-solubilizing bacteria, 0.8 parts of potassium-solubilizing bacteria, 12 parts of biochar, 12 parts of zeolite, 13 parts of perlite, 6 parts of vermiculite, 3 parts of seaweed extract, 4 parts of humic acid, 7 parts of waste cellulose nanocrystals, 40 parts of insect remains, 3 parts of nanocarbon dots, 9 parts of lime, and 15 parts of wood fiber.

[0016] A method for preparing a microbial agent compound fertilizer for sandy soil specifically comprises the following steps:

[0017] S1. Raw material preparation

[0018] Pour the compost onto a sieve and sieve to remove large impurities. Maintain the compost moisture content at 40-60%. Use a grinder to grind the biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber to a particle size of 1-2 mm. Grind the lime into a fine powder to facilitate subsequent mixing and pH adjustment.

[0019] S2. Mixing of bacterial strains

[0020] Cultivate nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria in appropriate liquid culture media, maintaining the concentration and activity of the bacterial solution. Control the culture temperature at 25-30°C for 24-48 hours. Mix the cultured nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria to form a composite bacterial solution. Spread the compost evenly and gradually spray the composite bacterial solution while constantly stirring to ensure that the bacterial solution is evenly attached to the surface of the compost. Let it ferment for 7-14 days, during which time, keep the compost moist and regularly turn it over to ensure adequate ventilation.

[0021] S3. Hybrid Regulation

[0022] Mix the fermented compost with biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber. Use a mixer or manually stir to ensure a uniform mix. Add nanocarbon dots to the mixture to enhance the fertilizer's adsorption capacity and trace element supply capacity. Add waste cellulose nanocrystals to enhance the fertilizer's structural strength and nutrient release capacity. Adjust the pH of the mixture with an appropriate amount of lime, with a target pH of 6.5-7.5. Mix the lime evenly to ensure a uniform pH.

[0023] S4. Enhanced biological activity

[0024] Add seaweed extract and humic acid to promote nutrient absorption by plant roots. After mixing evenly, place it under suitable temperature and humidity conditions for secondary fermentation. The fermentation time is 3-7 days. During this period, the pile should be turned regularly to ensure ventilation and uniform mixing. After fermentation is completed, the mixture should be uniformly granular and have no obvious odor.

[0025] S5. Molding and packaging

[0026] Dry the fermented mixture to a moisture content of 20-30% to avoid over-drying that affects the activity of the strain. Use natural air drying or low-temperature drying to ensure uniform drying. Use a granulator to granulate the mixture to form granular compound fertilizer with a diameter of 3-5 mm. Add an appropriate amount of water or adhesive during the granulation process to ensure the strength of the particles. Finally, package the finished compound fertilizer in moisture-proof bags and store them in a sealed manner. Keep the storage environment dry and cool, avoiding direct sunlight and high temperatures.

[0027] Preferably, in the biological activity enhancement step S4, after uniform mixing, the mixture is placed under conditions where the temperature is set at 25-30° C. and the humidity is set at 60-70% for secondary fermentation.

[0028] Preferably, the temperature of the low-temperature drying in the molding and packaging step S5 is controlled at 40-50°C.

[0029] Preferably, the fertilizer prepared by the method is used at a rate of 20-30 tons / hectare.

[0030] (3) Beneficial effects

[0031] The present invention provides a microbial agent compound fertilizer for sandy soil and a preparation method thereof. It has the following beneficial effects:

[0032] The present invention provides a bacterial agent compound fertilizer for sandy soil and a preparation method thereof. The present invention comprehensively utilizes compost, nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, and biochar to provide comprehensive and balanced nutrition, promote plant growth, add nano-carbon dots and waste cellulose nanocrystals to enhance the adsorption capacity and nutrient slow-release function of the fertilizer, use insect remains and wood fiber waste as raw materials to reduce environmental pollution, and has a lower risk of soil and water pollution than chemical fertilizers. The invention adds biochar and zeolite components to improve soil structure and enhance water and fertilizer retention capacity. The nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, and biochar are used to improve soil structure and water and fertilizer retention capacity. The synergistic effect of potassium bacteria increases soil microbial activity and promotes soil health. The fertilizer's quick-acting and long-lasting properties, along with the process design of primary and secondary fermentation, result in a more balanced and stable nutrient release. The addition of seaweed extract and humic acid enhances the plant's nutrient absorption capacity and improves fertilizer utilization efficiency. The bacterial agent compound fertilizer for sandy soil of the present invention has significant advantages in terms of raw material selection, environmental friendliness, soil improvement, and fertilizer utilization effects. By integrating multiple functional ingredients and adopting a scientific preparation process, it achieves comprehensive improvement of sandy soil and effective promotion of plant growth. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1:

[0035] An embodiment of the present invention provides a microbial agent compound fertilizer for sandy soil, which is prepared from the following raw materials in parts by weight:

[0036] 40 parts of compost, 0.3 parts of nitrogen-fixing bacteria, 0.3 parts of phosphate-solubilizing bacteria, 0.3 parts of potassium-solubilizing bacteria, 8 parts of biochar, 8 parts of zeolite, 9 parts of perlite, 4 parts of vermiculite, 1 part of seaweed extract, 2 parts of humic acid, 1 part of waste cellulose nanocrystals, 30 parts of insect remains, 0.3 parts of nanocarbon dots, 3 parts of lime, and 8 parts of wood fiber.

[0037] A method for preparing a microbial agent compound fertilizer for sandy soil specifically comprises the following steps:

[0038] S1. Raw material preparation

[0039] Pour the compost onto a sieve and sieve to remove large impurities, maintaining the compost moisture content at 40%. Use a grinder to grind the biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber into particles between 1 and 2 mm in size. Grind the lime into a fine powder to facilitate subsequent mixing and pH adjustment.

[0040] S2. Mixing of bacterial strains

[0041] Cultivate nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria in appropriate liquid culture media, maintain the concentration and activity of the bacterial solution, control the culture temperature at 25°C, and culture for 24 hours. Mix the cultured nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria to form a composite bacterial solution. Spread the compost evenly and gradually spray the composite bacterial solution while constantly stirring to ensure that the bacterial solution is evenly attached to the surface of the compost. Let it ferment for 7 days, during which time the compost should be kept moist and regularly turned to ensure adequate ventilation.

[0042] S3. Hybrid Regulation

[0043] Mix the fermented compost with biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber, using a mixer or manually stirring to ensure a uniform mix. Add nanocarbon dots to the mixture to enhance the fertilizer's adsorption capacity and trace element supply capacity. Add waste cellulose nanocrystals to enhance the fertilizer's structural strength and nutrient release capacity. Adjust the pH of the mixture with an appropriate amount of lime, with a target pH of 6.5. Mix the lime evenly to ensure a uniform pH adjustment.

[0044] S4. Enhanced biological activity

[0045] Add seaweed extract and humic acid to promote nutrient absorption by plant roots. After mixing evenly, place it under suitable temperature and humidity conditions for secondary fermentation. The fermentation time is 3 days. During this period, the pile should be turned regularly to ensure ventilation and uniform mixing. After fermentation is completed, the mixture should be uniformly granular and have no obvious odor.

[0046] S5. Molding and packaging

[0047] Dry the fermented mixture to a moisture content of 20% to avoid over-drying that affects the activity of the strain. Use natural air drying or low-temperature drying to ensure uniform drying. Use a granulator to granulate the mixture to form granular compound fertilizer with a diameter of 3 mm. Add an appropriate amount of water or adhesive during the granulation process to ensure the strength of the particles. Finally, package the finished compound fertilizer in a moisture-proof bag and store it in a sealed manner. Keep the storage environment dry and cool, avoiding direct sunlight and high temperature.

[0048] In step S4, after uniform mixing in biological activity enhancement, secondary fermentation is performed at a temperature of 25° C. and a humidity of 60%. In step S5, low-temperature drying is performed at a temperature of 40° C. in molding and packaging. The fertilizer prepared by the method is used at a rate of 20 tons / hectare.

[0049] Example 2:

[0050] An embodiment of the present invention provides a microbial agent compound fertilizer for sandy soil, which is prepared from the following raw materials in parts by weight:

[0051] 50 parts of compost, 0.6 parts of nitrogen-fixing bacteria, 0.6 parts of phosphate-solubilizing bacteria, 0.6 parts of potassium-solubilizing bacteria, 10 parts of biochar, 10 parts of zeolite, 11 parts of perlite, 5 parts of vermiculite, 2 parts of seaweed extract, 5 parts of humic acid, 4 parts of waste cellulose nanocrystals, 35 parts of insect remains, 2 parts of nanocarbon dots, 6 parts of lime, and 12 parts of wood fiber.

[0052] A method for preparing a microbial agent compound fertilizer for sandy soil specifically comprises the following steps:

[0053] S1. Raw material preparation

[0054] Pour the compost onto a sieve and sieve to remove large impurities, maintaining the compost at 50% moisture. Use a grinder to grind the biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber to a particle size of 1.5 mm. Grind the lime into a fine powder to facilitate subsequent mixing and pH adjustment.

[0055] S2. Mixing of bacterial strains

[0056] Cultivate nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria in appropriate liquid culture media, maintain the concentration and activity of the bacterial solution, control the culture temperature at 26°C, and culture for 36 hours. Mix the cultured nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria to form a composite bacterial solution. Spread the compost evenly and gradually spray the composite bacterial solution while constantly stirring to ensure that the bacterial solution is evenly attached to the surface of the compost. Let it ferment for 11 days, during which time the compost should be kept moist and regularly turned to ensure adequate ventilation.

[0057] S3. Hybrid Regulation

[0058] Mix the fermented compost with biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber, using a mixer or manually stirring to ensure a uniform mix. Add nanocarbon dots to the mixture to enhance the fertilizer's adsorption capacity and trace element supply capacity. Add waste cellulose nanocrystals to enhance the fertilizer's structural strength and nutrient release capacity. Adjust the pH of the mixture with an appropriate amount of lime, with a target pH of 7. Mix the lime evenly to ensure a uniform pH.

[0059] S4. Enhanced biological activity

[0060] Add seaweed extract and humic acid to promote nutrient absorption by plant roots. After mixing evenly, place it under suitable temperature and humidity conditions for secondary fermentation. The fermentation time is 5 days. During this period, the pile should be turned regularly to ensure ventilation and uniform mixing. After fermentation is completed, the mixture should be uniformly granular and have no obvious odor.

[0061] S5. Molding and packaging

[0062] Dry the fermented mixture to a moisture content of 25% to avoid over-drying that affects the activity of the strain. Use natural air drying or low-temperature drying to ensure uniform drying. Use a granulator to granulate the mixture to form granular compound fertilizer with a diameter of 4 mm. Add an appropriate amount of water or adhesive during the granulation process to ensure the strength of the particles. Finally, package the finished compound fertilizer in a moisture-proof bag and store it in a sealed manner. Keep the storage environment dry and cool, avoiding direct sunlight and high temperature.

[0063] In step S4, after uniform mixing in biological activity enhancement, secondary fermentation is performed under conditions where the temperature is set at 27° C. and the humidity is set at 65%. In step S5, the temperature of low-temperature drying in molding and packaging is controlled at 45° C. The fertilizer prepared by the method is used at a rate of 25 tons / hectare.

[0064] Example 3:

[0065] An embodiment of the present invention provides a microbial agent compound fertilizer for sandy soil, which is prepared from the following raw materials in parts by weight:

[0066] 60 parts of compost, 0.8 parts of nitrogen-fixing bacteria, 0.8 parts of phosphate-solubilizing bacteria, 0.8 parts of potassium-solubilizing bacteria, 12 parts of biochar, 12 parts of zeolite, 13 parts of perlite, 6 parts of vermiculite, 3 parts of seaweed extract, 4 parts of humic acid, 7 parts of waste cellulose nanocrystals, 40 parts of insect remains, 3 parts of nanocarbon dots, 9 parts of lime, and 15 parts of wood fiber.

[0067] A method for preparing a microbial agent compound fertilizer for sandy soil specifically comprises the following steps:

[0068] S1. Raw material preparation

[0069] Pour the compost onto a sieve and sieve to remove large impurities, maintaining the compost moisture content at 60%. Use a grinder to grind the biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber to a particle size of 2 mm. Grind the lime into a fine powder to facilitate subsequent mixing and pH adjustment.

[0070] S2. Mixing of bacterial strains

[0071] Cultivate nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria in appropriate liquid culture media, maintain the concentration and activity of the bacterial solution, control the culture temperature at 30°C, and culture for 48 hours. Mix the cultured nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria to form a composite bacterial solution. Spread the compost evenly and gradually spray the composite bacterial solution while constantly stirring to ensure that the bacterial solution is evenly attached to the surface of the compost. Let it ferment for 7-14 days, during which time the compost should be kept moist and regularly turned to ensure adequate ventilation.

[0072] S3. Hybrid Regulation

[0073] Mix the fermented compost with biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber. Use a mixer or manually stir to ensure a uniform mix. Add nanocarbon dots to the mixture to enhance the fertilizer's adsorption capacity and trace element supply capacity. Add waste cellulose nanocrystals to enhance the fertilizer's structural strength and nutrient release capacity. Adjust the pH of the mixture with an appropriate amount of lime, with a target pH of 7.5. Mix the lime evenly to ensure a uniform pH.

[0074] S4. Enhanced biological activity

[0075] Add seaweed extract and humic acid to promote nutrient absorption by plant roots. After mixing evenly, place it under suitable temperature and humidity conditions for secondary fermentation. The fermentation time is 3-7 days. During this period, the pile should be turned regularly to ensure ventilation and uniform mixing. After fermentation is completed, the mixture should be uniformly granular and have no obvious odor.

[0076] S5. Molding and packaging

[0077] Dry the fermented mixture to a moisture content of 30% to avoid over-drying that affects the activity of the strain. Use natural air drying or low-temperature drying to ensure uniform drying. Use a granulator to granulate the mixture to form granular compound fertilizer with a diameter of 3-5 mm. Add an appropriate amount of water or adhesive during the granulation process to ensure the strength of the particles. Finally, package the finished compound fertilizer in moisture-proof bags and store them in a sealed manner. Keep the storage environment dry and cool, avoiding direct sunlight and high temperatures.

[0078] In step S4, after the mixture is evenly mixed in the biological activity enhancement, the mixture is placed under conditions of secondary fermentation at a temperature of 30° C. and a humidity of 70%. In step S5, the temperature of low-temperature drying in the molding and packaging is controlled at 50° C. The fertilizer prepared by the method is used at a rate of 30 tons / hectare.

[0079] In the above three embodiments, after fertilizing sandy land, the initial content of sandy land according to conventional methods is as follows (unit: kg / hectare):

[0080] Nitrogen (N): 10

[0081] Phosphorus (P): 5

[0082] Potassium (K): 10

[0083] Calcium (Ca): 1.

[0084] Then the soil material content of sandy land after fertilization is:

[0085]

[0086] According to the differences in raw materials and fertilizer amounts in the above three embodiments, it can be concluded that the embodiments are more suitable for the situation where the sandy soil is more serious or less serious.

[0087] Example 1:

[0088] Fertilizer application rate: 20 tons / hectare

[0089] The proportion of compost and insect remains in the raw material ratio is relatively small, and the overall increase in nitrogen, phosphorus, potassium, and calcium nutrients is relatively small. It is suitable for relatively mild sandy soil conditions and soil that requires moderate improvement.

[0090] Example 2:

[0091] Fertilizer rate: 25 tons / hectare, with a moderate proportion of compost and insect debris in the raw material ratio, and an overall increase in nitrogen, phosphorus, potassium, calcium and other nutrients. Suitable for medium sandy soils that require significant improvement.

[0092] Example 3:

[0093] Fertilizer dosage: 30 tons / hectare. Compost and insect debris contribute the most to overall nitrogen, phosphorus, potassium, calcium, and other nutrients. Suitable for severely sandy soils that require extensive improvement.

[0094] Example 3 is most suitable for severe sandy soil conditions. This is because it provides the most organic matter and nutrients, significantly improving soil structure and fertility. Example 1 is most suitable for mild sandy soil conditions. Because it provides relatively few nutrients, it is suitable for soil conditions with slightly poorer conditions but not requiring significant improvement. Example 2 is most suitable for moderate sandy soil conditions. It provides more nutrients than Example 1, but not as many as Example 3, making it suitable for moderate sandy soil in need of improvement. Choosing the appropriate example based on the actual severity of the sandy soil can effectively improve soil structure, soil fertility, and plant growth.

[0095] The formula materials of the bacterial agent compound fertilizer for sandy soil of the present invention each have their own unique advantages. The specific advantages of each raw material are described in detail below:

[0096] compost

[0097] Increase organic matter content: Compost can significantly increase the organic matter content in the soil, improve soil structure, and increase soil water holding capacity and aeration.

[0098] Slow-release nutrients: The organic matter in compost slowly decomposes in the soil, gradually releasing nutrients needed by plants, such as nitrogen, phosphorus, and potassium.

[0099] Nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria

[0100] Improve nutrient availability: These microbial strains can convert nitrogen, phosphorus and potassium that are difficult to use in the soil into a form that can be absorbed by plants, thereby improving the availability of soil nutrients.

[0101] Promote plant growth: Through microbial activity, it increases beneficial bacteria in the soil, inhibits harmful bacteria, promotes plant root growth, and improves plant disease resistance.

[0102] biochar

[0103] Improve soil fertility: Biochar has a high specific surface area and porous structure, which can absorb nutrients and prevent nutrient loss, while providing a good growth environment for plant roots.

[0104] Improve soil structure: increase soil aggregate structure, improve soil water retention and aeration.

[0105] zeolite

[0106] Improve ion exchange capacity: Zeolite has a high cation exchange capacity, which can adsorb and slowly release nutrients from the soil, providing plants with a continuous nutrient supply.

[0107] Improve soil acidity and alkalinity: Zeolite can adjust the pH value of the soil and improve the soil environment.

[0108] Perlite

[0109] Improve soil aeration: Perlite is lightweight and porous, which can improve soil aeration and drainage capacity and prevent soil compaction.

[0110] Provide minerals: Perlite contains some trace elements, which can provide additional mineral nutrition for plants.

[0111] Vermiculite

[0112] Water and fertilizer retention: Vermiculite has good water absorption and fertilizer retention properties, which can keep the soil moist and reduce water and nutrient loss.

[0113] Provides Magnesium and Potassium: Vermiculite contains magnesium and potassium, which help improve soil and promote plant growth.

[0114] seaweed extract

[0115] Promote root development: Seaweed extract is rich in plant growth regulators, such as gibberellins and cytokinins, which can promote plant root development and improve nutrient absorption capacity.

[0116] Enhance stress resistance: Seaweed extract can also improve the stress resistance of plants and enhance their ability to resist adverse environments such as drought, pests and diseases.

[0117] Humic acid

[0118] Improve soil structure: Humic acid can promote the agglomeration of soil particles, improve soil structure, and increase soil water retention and air permeability.

[0119] Increase nutrient absorption: Humic acid can chelate heavy metals in the soil, reduce toxicity to plants, and promote the absorption of nutrients by plants.

[0120] Waste cellulose nanocrystals

[0121] Enhance structural strength: Waste cellulose nanocrystals can enhance the structural strength of fertilizers, prevent fertilizer particles from breaking, and improve the durability of fertilizers.

[0122] Slow-release effect: Cellulose nanocrystals help to slow down the release of nutrients in fertilizers, achieve a slow-release effect, and improve fertilizer utilization efficiency.

[0123] Insect remains

[0124] Rich nutrients: Insect remains are rich in nitrogen, phosphorus, potassium and other elements, which can provide comprehensive nutrition for plants.

[0125] Source of organic matter: Insect remains as a source of organic matter can improve soil, increase soil fertility and microbial activity.

[0126] Carbon nanodots

[0127] Improve adsorption capacity: Nanocarbon dots have extremely high specific surface area and adsorption capacity, which can adsorb nutrients and heavy metals in the soil and improve the soil environment.

[0128] Enhance the supply of trace elements: Nano-carbon dots can carry trace elements, provide the trace nutrients required by plants, and improve plant growth.

[0129] lime

[0130] Adjust pH value: Lime can effectively neutralize the acidity in the soil, adjust the soil pH value, improve the soil environment, and promote the growth of plant roots.

[0131] Provide calcium: Lime contains a large amount of calcium, which helps improve soil structure and increase plant disease resistance.

[0132] wood fiber

[0133] Improve soil structure: Wood fiber has good water absorption and air permeability, which can improve soil structure and increase soil water retention and air permeability.

[0134] Source of organic matter: Wood fiber, as a source of organic matter, can increase the organic matter content in the soil and promote soil microbial activity.

[0135] In summary, the microbial agent compound fertilizer for sandy soil of the present invention can not only significantly increase the nutrient content of the soil by scientifically proportioning multiple raw materials, but also improve the soil structure, enhance soil fertility and plant growth effect, thereby effectively solving the problem of barren sandy soil.

[0136] The present invention provides a bacterial compound fertilizer for sandy soil. By adding organic-rich raw materials such as compost, biochar, and insect remains, the present invention can significantly increase the organic matter content in the soil, improve the soil structure, and enhance the fertility of the soil. Compost provides slowly released nutrients, while biochar and insect remains further increase the nutrient reserves of the soil. The addition of nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria microbial strains can increase the effectiveness of important nutrients such as nitrogen, phosphorus, and potassium in the soil, and promote the absorption of these nutrients by plant roots. These microorganisms can not only decompose organic matter in the soil and release nutrients that can be absorbed by plants, but also improve the soil microecological environment and promote the healthy growth of plants.

[0137] The porous materials such as biochar, perlite, and vermiculite in the present invention have good water absorption and fertilizer retention, and can effectively maintain moisture and nutrients in the soil to prevent loss. Especially in a soil environment with strong drainage and poor water retention capacity such as sandy land, the water holding capacity of the soil can be significantly improved, and the frequency of irrigation can be reduced. The addition of various raw materials such as zeolite, wood fiber, and humic acid can improve the soil structure, improve the air permeability and drainage of the soil, form a good soil aggregate structure, increase the air permeability of the soil, and promote root growth. By adding lime, the present invention can effectively regulate the pH value of the soil, prevent soil acidification, provide a suitable soil environment, and promote the absorption of nutrients by plants. At the same time, lime also provides calcium, which further improves the soil structure and improves the disease resistance of plants.

[0138] The addition of seaweed extract and humic acid can not only promote the development and nutrient absorption of plant roots, but also increase the biological activity in the soil, promote the reproduction of beneficial microorganisms, inhibit the growth of harmful bacteria, and improve the ecological health level of the soil. The addition of discarded cellulose nanocrystals and nano-carbon dots enables the present invention to have a good slow-release effect, can delay the release rate of nutrients, provide a continuous nutrient supply, and avoid the waste of fertilizers and the impact of excessive fertilization on the environment. Through the addition of reasonable nutrition and beneficial ingredients, the present invention can enhance the stress resistance of plants, so that they can still maintain a good growth state under adverse environmental conditions such as drought, pests and diseases.

[0139] The raw materials used in the present invention are mostly natural substances and recycled waste, such as compost, insect remains and discarded cellulose nanocrystals, which are environmentally friendly, can reduce the use of chemical fertilizers, reduce environmental pollution risks, and promote the sustainable development of agriculture.

[0140] The formula and preparation method of the present invention are simple and easy to implement, and the raw materials are readily available, making it suitable for large-scale agricultural production. By adjusting the raw material ratio and fertilizer application rate, it can adapt to varying degrees of sandy soil improvement needs, effectively addressing sandy soil problems ranging from mild to severe. The present invention's microbial agent compound fertilizer for sandy soil, through its scientific ratio and the synergistic effects of multiple high-quality raw materials, not only significantly improves sandy soil fertility and plant growth, but also offers multiple advantages such as environmental protection and sustainability, providing an efficient and economical solution for agricultural production.

[0141] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A microbial agent compound fertilizer for sandy soil, characterized in that: The invention is prepared by comprising the following raw materials in parts by weight: 40-60 parts of compost, 0.3-0.8 parts of nitrogen-fixing bacteria, 0.3-0.8 parts of phosphate-solubilizing bacteria, 0.3-0.8 parts of potassium-solubilizing bacteria, 8-12 parts of biochar, 8-12 parts of zeolite, 9-13 parts of perlite, 4-6 parts of vermiculite, 1-3 parts of seaweed extract, 2-4 parts of humic acid, 1-7 parts of waste cellulose nanocrystals, 30-40 parts of insect remains, 0.3-3 parts of nanocarbon dots, 3-9 parts of lime, and 8-15 parts of wood fiber.

2. The microbial agent compound fertilizer for sandy soil according to claim 1, characterized in that: The invention is prepared by comprising the following raw materials in parts by weight: 40 parts of compost, 0.3 parts of nitrogen-fixing bacteria, 0.3 parts of phosphate-solubilizing bacteria, 0.3 parts of potassium-solubilizing bacteria, 8 parts of biochar, 8 parts of zeolite, 9 parts of perlite, 4 parts of vermiculite, 1 part of seaweed extract, 2 parts of humic acid, 1 part of waste cellulose nanocrystals, 30 parts of insect remains, 0.3 parts of nanocarbon dots, 3 parts of lime, and 8 parts of wood fiber.

3. The microbial agent compound fertilizer for sandy soil according to claim 1, characterized in that: The invention is prepared by comprising the following raw materials in parts by weight: 50 parts of compost, 0.6 parts of nitrogen-fixing bacteria, 0.6 parts of phosphate-solubilizing bacteria, 0.6 parts of potassium-solubilizing bacteria, 10 parts of biochar, 10 parts of zeolite, 11 parts of perlite, 5 parts of vermiculite, 2 parts of seaweed extract, 5 parts of humic acid, 4 parts of waste cellulose nanocrystals, 35 parts of insect remains, 2 parts of nanocarbon dots, 6 parts of lime, and 12 parts of wood fiber.

4. The microbial agent compound fertilizer for sandy soil according to claim 1, characterized in that: The invention is prepared by comprising the following raw materials in parts by weight: 60 parts of compost, 0.8 parts of nitrogen-fixing bacteria, 0.8 parts of phosphate-solubilizing bacteria, 0.8 parts of potassium-solubilizing bacteria, 12 parts of biochar, 12 parts of zeolite, 13 parts of perlite, 6 parts of vermiculite, 3 parts of seaweed extract, 4 parts of humic acid, 7 parts of waste cellulose nanocrystals, 40 parts of insect remains, 3 parts of nanocarbon dots, 9 parts of lime, and 15 parts of wood fiber.

5. A method for preparing a microbial agent compound fertilizer for sandy soil, characterized in that: The specific steps include: S1. Raw material preparation Pour the compost onto a sieve and sieve to remove large impurities. Maintain the compost moisture content at 40-60%. Use a grinder to grind the biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber to a particle size of 1-2 mm. Grind the lime into a fine powder to facilitate subsequent mixing and pH adjustment. S2. Mixing of bacterial strains Cultivate nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria in appropriate liquid culture media, maintaining the concentration and activity of the bacterial solution. Control the culture temperature at 25-30°C for 24-48 hours. Mix the cultured nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-solubilizing bacteria to form a composite bacterial solution. Spread the compost evenly and gradually spray the composite bacterial solution while constantly stirring to ensure that the bacterial solution is evenly attached to the surface of the compost. Let it ferment for 7-14 days, during which time, keep the compost moist and regularly turn it over to ensure adequate ventilation. S3. Hybrid Regulation Mix the fermented compost with biochar, zeolite, perlite, vermiculite, insect debris, and wood fiber. Use a mixer or manually stir to ensure a uniform mix. Add nanocarbon dots to the mixture to enhance the fertilizer's adsorption capacity and trace element supply capacity. Add waste cellulose nanocrystals to enhance the fertilizer's structural strength and nutrient release capacity. Adjust the pH of the mixture with an appropriate amount of lime, with a target pH of 6.5-7.

5. Mix the lime evenly to ensure a uniform pH. S4. Enhanced biological activity Add seaweed extract and humic acid to promote nutrient absorption by plant roots. After mixing evenly, place it under suitable temperature and humidity conditions for secondary fermentation. The fermentation time is 3-7 days. During this period, the pile should be turned regularly to ensure ventilation and uniform mixing. After fermentation is completed, the mixture should be uniformly granular and have no obvious odor. S5. Molding and packaging Dry the fermented mixture to a moisture content of 20-30% to avoid over-drying that affects the activity of the strain. Use natural air drying or low-temperature drying to ensure uniform drying. Use a granulator to granulate the mixture to form granular compound fertilizer with a diameter of 3-5 mm. Add an appropriate amount of water or adhesive during the granulation process to ensure the strength of the particles. Finally, package the finished compound fertilizer in moisture-proof bags and store them in a sealed manner. Keep the storage environment dry and cool, avoiding direct sunlight and high temperatures.

6. The method for preparing a microbial agent compound fertilizer for sandy soil according to claim 5, characterized in that: In the biological activity enhancement step S4, after the mixture is evenly mixed, the mixture is placed under conditions where the temperature is set at 25-30° C. and the humidity is set at 60-70% for secondary fermentation.

7. The method for preparing a microbial agent compound fertilizer for sandy soil according to claim 5, characterized in that: The temperature of the low-temperature drying during the molding and packaging in step S5 is controlled at 40-50°C.

8. The method for preparing a microbial agent compound fertilizer for sandy soil according to claim 5, characterized in that: The fertilizer prepared by the method is used at a rate of 20-30 tons per hectare.

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