Biological organic compound fertilizer and preparation method thereof

Abstract

The invention relates to the field of agriculture, and discloses a biological organic compound fertilizer and a preparation method thereof, and the biological organic compound fertilizer comprises the following components: 10%-20% of sodium humate; 2%-6% of a seaweed extract; 1%-3% of natural organic acid; 5%-15% of ammonium sulfate; 4%-10% of monoammonium phosphate; 3%-7% of potassium chloride; 2%-5% of nano silicon; 2%-4% of polyvinyl alcohol; 1%-3% of polyacrylic acid; 2%-5% of calcium sulfate; 1%-4% of calcium phosphate; 3%-6% of amino acid; and 2%-4% of trace elements. By combining various organic and biological components such as the sodium humate, the seaweed extract and the microbial agent, the effects of slowly releasing nutrients and promoting crop growth are achieved, and compared with a scheme of singly using a chemical fertilizer or an organic fertilizer in the prior art, the compound fertilizer disclosed by the invention can release the nutrients more enduringly, so that the crop growth is promoted. The side effect of overuse of the chemical fertilizer is avoided.

Description

Technical Field

[0001] The present invention relates to the field of agriculture, specifically to a biological organic compound fertilizer and its preparation method. Background Art

[0002] As a new type of fertilizer that combines the advantages of organic fertilizers and chemical fertilizers, biological organic compound fertilizers have been widely used in the agricultural field in recent years. It is made by mixing organic materials, microbial inoculants, and chemical fertilizers in a certain proportion and through processes such as fermentation and granulation. It can not only provide rich organic matter but also ensure the supply of quick-acting nutrients. The advantages of biological organic compound fertilizers are that they can not only improve soil structure, increase soil organic matter, but also promote the healthy growth of crops through a reasonable nutrient release pattern.

[0003] As a new type of fertilizer that combines the advantages of organic fertilizers and chemical fertilizers, biological organic compound fertilizers have been widely used in the agricultural field in recent years. It is made by mixing organic materials, microbial inoculants, and chemical fertilizers in a certain proportion and through processes such as fermentation and granulation. It can not only provide rich organic matter but also ensure the supply of quick-acting nutrients. The advantages of biological organic compound fertilizers are that they can not only improve soil structure, increase soil organic matter, but also promote the healthy growth of crops through a reasonable nutrient release pattern.

[0004] Although microbial inoculants play a positive role in soil improvement and promoting crop growth, the microbial inoculants in existing biological organic compound fertilizers are usually of a single type or have insufficient activity, resulting in limited effects in improving soil fertility and soil health. The effective combination of specific microorganisms such as rhizobia and cellulose-decomposing bacteria can promote the decomposition of organic matter, enhance the biological activity of the soil, and improve the long-term effect of fertilizers. However, the synergistic effect of microorganisms is rarely fully exerted in existing fertilizers, and there is also a lack of suitable microbial community matching schemes. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a biological organic compound fertilizer and its preparation method, which solves the problems of uneven nutrient release, poor persistence of fertilizer effects, and limited effects of microbial inoculants in existing fertilizers.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A biological organic compound fertilizer, comprising the following components: 10% - 20% of sodium humate; 2% - 6% of seaweed extract; 1% - 3% of natural organic acid; 5% - 15% of ammonium sulfate; 4% - 10% of monoammonium phosphate; 3% - 7% of potassium chloride; 2% to 5% of nano-silicon; 2% to 4% of polyvinyl alcohol; 1% to 3% of polyacrylic acid; 2% to 5% of calcium sulfate; 1% to 4% of calcium phosphate; 3% to 6% of amino acids; 2% to 4% of trace elements.

[0007] Furthermore, sodium humate (10% - 20%): Sodium humate is obtained by extracting or synthesizing humic acid. It has excellent slow-release properties, can improve soil structure, increase the water-holding capacity and permeability of the soil, while enhancing microbial activity and reducing water loss.

[0008] Seaweed extract (2% - 6%): Obtained by boiling and enzymatic hydrolysis of seaweed plants (including brown algae and red algae), it is rich in plant hormones, amino acids and minerals, which helps to promote the root growth and stress resistance of plants and improve the nutrient absorption capacity of plants.

[0009] Natural organic acids (1% - 3%): Such as citric acid, oxalic acid, etc., which can regulate the pH value of the soil, promote the dissolution of minerals, and make trace elements more easily absorbed by plants.

[0010] Chemical fertilizer components (such as ammonium sulfate, monoammonium phosphate, potassium chloride, etc.): These components provide plants with rapid and effective nitrogen, phosphorus and potassium elements, supporting the rapid growth of crops, especially during the critical growth periods of crops.

[0011] Nano-silicon (2% - 5%): As an efficient dissolution control material, nano-silicon can regulate the release rate of fertilizers, reduce nutrient loss, and ensure that crops obtain nutrient support for a long time.

[0012] Polyvinyl alcohol and polyacrylic acid (2% - 4%, 1% - 3%): Used for coating fertilizer particles, making the fertilizers not easily broken during storage, transportation and application, while regulating the nutrient release rate and increasing the slow-release performance of fertilizers.

[0013] Calcium sulfate and calcium phosphate (2% - 5%, 1% - 4%): Provide necessary calcium and phosphorus sources for the soil, help to promote the healthy growth of crops, and optimize the phosphorus utilization efficiency of crops by slowly releasing phosphorus.

[0014] Amino acids and trace elements (3% - 6%, 2% - 4%): Amino acids can provide nitrogen sources for crops, and trace elements such as zinc and boron can promote the photosynthesis of plants, enhance the pest and disease resistance of plants, and improve the overall growth health of crops.

[0015] Preferably, the sodium humate is obtained by extracting or synthesizing humic acid, and the humic acid can be obtained through an artificially controlled organic matter degradation process of humus.

[0016] Furthermore, the artificially controlled degradation process of humus can endow humic acid with strong stability and a long slow-release period, avoid rapid nutrient loss, and provide a continuous and effective soil improvement effect.

[0017] Preferably, the seaweed extract is made from a seaweed extract solution, and the seaweed extract solution can be obtained by treating seaweed plants including brown algae and red algae through boiling and enzymatic hydrolysis methods. The trace elements include zinc and boron.

[0018] Furthermore, the seaweed extract solution is obtained through boiling or enzymatic hydrolysis, which can maximize the retention of growth factors, amino acids, and trace elements in seaweed. These components can effectively promote the root development of crops, enhance the stress resistance of crops, and optimize the soil microbial community structure.

[0019] A preparation method of a biological organic compound fertilizer includes the following steps: Pre-treat and mix sodium humate, seaweed extract, natural organic acid, ammonium sulfate, monoammonium phosphate, potassium chloride, nano-silicon, polyvinyl alcohol, polyacrylic acid, calcium sulfate, and calcium phosphate. The pre-treatment step includes heating each component to 60°C to 80°C at a certain temperature and mixing to ensure the uniform distribution and reaction of each component; Inoculate the microbial inoculant into the above mixture and cultivate it. The microbial inoculant includes beneficial strains such as rhizobia, cellulose-decomposing bacteria, and Bacillus subtilis, and its activity is enhanced by adjusting appropriate cultivation conditions; Granulate the above mixture and perform coating treatment with a coating material. During the granulation process, appropriate moisture and temperature are used to form uniform granules, and the release rate of fertilizer nutrients is controlled by the coating material; Fermentation step to adjust the nutrients in the fertilizer. During the fermentation process, specific microbial communities are added to promote the decomposition of organic matter and the conversion of nutrients; Dry and package. The drying process ensures the stable storage of granules at low humidity, and quality control is carried out during the packaging process to ensure the long-term storage stability of the fertilizer.

[0020] Preferably, the pre-treatment process includes heating the mixture to 60°C - 80°C and maintaining this temperature for 2 - 3 hours. Within this temperature range, it helps to accelerate the reaction of humic acid with other components.

[0021] Furthermore, through appropriate heating, the reaction between sodium humate and other components can be accelerated, ensuring the effectiveness of humic acid in the fertilizer and improving the nutritional efficiency of the fertilizer.

[0022] Preferably, the microbial inoculant includes rhizobia, cellulose-decomposing bacteria, and Bacillus subtilis. After inoculation, the inoculant promotes its growth and activity in the fertilizer by controlling appropriate temperature, humidity, and time conditions.

[0023] Furthermore, the microbial inoculant helps decompose organic substances in the fertilizer, fix nitrogen sources, and enhance the effect of the fertilizer through metabolic activities, improving soil quality and plant health.

[0024] Preferably, the granulation step includes granulating using a rotary drum granulator under the condition of controlling the temperature at 50°C - 70°C, and the granulation time is 5 - 10 minutes to ensure that the granules are firm and do not break under suitable temperature and humidity conditions, and the granules do not stick to each other.

[0025] Furthermore, through appropriate temperature and humidity conditions, the granulation process can ensure that the fertilizer granules are firm and do not stick to each other, avoiding fragmentation or loss of the fertilizer during transportation and use.

[0026] Preferably, the coating treatment is carried out using a composite material of polyvinyl alcohol or polyacrylic acid and nano-silicon. The coating material helps form a moisture-proof layer and slows down the dissolution rate of the fertilizer, thus achieving a slow-release function.

[0027] Furthermore, polyvinyl alcohol (PVA) and polyacrylic acid (PAA), as polymer polymers, have good water solubility and film-forming properties. After being compounded with nano-silicon, they can form a uniform and stable coating layer. The coating material effectively isolates moisture in the external environment and slows down the dissolution rate of the fertilizer. This slow-release effect ensures that the nutrients in the fertilizer can be gradually released over a long period of time, providing continuous nutrient supply for crops and reducing fertilizer loss.

[0028] Preferably, the fermentation step is carried out under the conditions of a temperature of 25°C - 30°C and a humidity of 40% - 50%, and the fermentation time is 7 - 14 days. The temperature and humidity conditions are conducive to the stable growth and metabolism of microorganisms.

[0029] Furthermore, the fermentation process relies on the metabolic activities of microorganisms. Suitable temperature (25°C - 30°C) and humidity (40% - 50%) provide an optimal environment for the growth and metabolism of microorganisms. Microorganisms can quickly decompose organic substances under this condition and convert them into nutrients that can be absorbed by plants, promoting the biodegradation process of the fertilizer. Fermentation helps improve the bioavailability of the fertilizer and the overall efficiency of the fertilizer.

[0030] Preferably, the drying step is carried out at 50°C - 70°C for a duration of 2 - 4 hours. By adjusting the drying time and temperature, ensure that the moisture in the fertilizer granules is completely removed.

[0031] Furthermore, during the drying process, heat treatment is used to remove moisture from the fertilizer granules, prevent microbial growth, and maintain the long-term stability of the fertilizer. Controlling the temperature within the range of 50°C to 70°C can effectively remove excess moisture while avoiding the degradation or inactivation of fertilizer components caused by high temperatures. A continuous drying time of 2 to 4 hours ensures the complete removal of moisture inside the granules, thereby enhancing the storage life and usage effect of the fertilizer.

[0032] The present invention provides a bio-organic compound fertilizer and its preparation method. It has the following beneficial effects: 1. The present invention combines various organic and biological components such as sodium humate, seaweed extract, and microbial inoculants, achieving the effects of nutrient slow release and crop growth promotion. Compared with the prior art solutions that solely use chemical fertilizers or organic fertilizers, the compound fertilizer of the present invention can release nutrients more persistently, avoiding the side effects of excessive chemical fertilizer use and solving the problems of soil nutrient imbalance and pollution.

[0033] 2. Through the coating technology, the present invention uses polyvinyl alcohol and nano-silicon composite materials for fertilizer coating, achieving the technical effect of effectively controlling the nutrient release rate. Compared with the phenomenon of rapid dissolution of traditional fertilizers, the present invention successfully solves the problem of excessive nutrient loss in fertilizers, ensuring that crops can stably absorb nutrients throughout the growth cycle.

[0034] 3. By optimizing the use of microbial inoculants, especially the combination of rhizobia and cellulose-decomposing bacteria, the present invention enhances the biological activity of the soil, achieving the effects of improving soil structure and increasing soil fertility. Compared with the prior art solutions that solely use fertilizers, the present invention solves the problems of soil health degradation and poor crop growth by enhancing soil microbial activity.

[0035] 4. In the preparation method of the present invention, by extending the fermentation time and optimizing the microbial community, the effects of efficient conversion and continuous release of fertilizer nutrients are achieved. Compared with the prior art solutions that use short-term fermentation or single chemical fertilizers, the present invention can supply the nutrients required by plants for a longer time, avoiding the problem of insufficient short-term effects of fertilizers and enhancing the persistence and usage efficiency of fertilizers. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flowchart of the method of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to the attached Figure 1 .

[0039] Example 1: Component ratio: 14% sodium humate 5% seaweed extract 2% natural organic acid 10% ammonium sulfate 5% monoammonium phosphate 4% potassium chloride 3% nano-silicon 3% polyvinyl alcohol 2% polyacrylic acid 3% calcium sulfate 2% calcium phosphate 6% amino acids 3% trace elements Steps and process parameters: Mixing: After weighing components such as sodium humate, seaweed extract, natural organic acid, ammonium sulfate, monoammonium phosphate, and potassium chloride, add them to a mixer, heat to 65°C, and maintain for 30 minutes to ensure complete dissolution and uniform distribution of each component.

[0040] Inoculating microbial inoculant: Add rhizobia, cellulose-decomposing bacteria, and Bacillus subtilis, adjust the temperature to 28°C, control the humidity at 50%, and culture for 12 hours to enhance microbial activity.

[0041] Granulation: Granulate the cultured mixture through a granulator. The temperature of the rotary drum granulator is set at 55°C, the humidity is adjusted to 30%, and the granulation time is controlled within 8 minutes to make the granules uniform and firm.

[0042] Coating treatment: Coating treatment is carried out on the fertilizer granules. Use a composite material of polyvinyl alcohol and nano-silicon, and set the thickness of the coating layer to 7% to control the slow release of nutrients.

[0043] Fermentation: Put the coated granules into a fermentation tank, set the temperature at 27°C, the humidity at 45%, and control the fermentation time within 10 days to promote the conversion of nutrients and enhance the fertilizer activity.

[0044] Drying and Packaging: The fermented fertilizer granules are dried at 60°C for 3 hours to ensure that the moisture content is reduced to less than 5%. Then quality inspection is carried out, and after passing the inspection, they are sealed and packaged, with each bag weighing 25 kg.

[0045] Example 2: Component Ratio: 18% sodium humate 4% seaweed extract 2% natural organic acid 6% ammonium sulfate 6% monoammonium phosphate 5% potassium chloride 3% nano-silicon 2% polyvinyl alcohol 2% polyacrylic acid 4% calcium sulfate 3% calcium phosphate 5% amino acids 4% trace elements Steps and Process Parameters: Pretreatment and Mixing: Weigh the components such as sodium humate, seaweed extract, natural organic acid, ammonium sulfate, monoammonium phosphate, and potassium chloride according to the ratio, put them into a mixer, set the temperature at 70°C, and keep for 30 minutes to ensure uniform mixing.

[0046] Microbial Inoculation and Cultivation: Add microbial inoculants such as rhizobia and Bacillus subtilis, set the cultivation temperature at 30°C, the humidity at 60%, and cultivate for 12 hours.

[0047] Granulation and Coating: Put the cultivated mixture into a granulator, set the temperature at 60°C, the humidity at 30%, and the granulation time at 10 minutes. After the granules are formed, use a composite material of polyacrylic acid and nano-silicon for coating to ensure that the coating layer thickness is 10%.

[0048] Fermentation: The coated granules enter the fermentation stage, set the temperature at 25°C, the humidity at 45%, and the fermentation time at 14 days to enhance the conversion of nutrients.

[0049] Drying: After fermentation, the fertilizer granules enter the drying process, control the drying temperature at 65°C for 2 hours to ensure the stability and long-term storage of the fertilizer.

[0050] Packaging: Conduct quality inspection on the dried fertilizer granules, and after meeting the standards, carry out packaging, with each bag of fertilizer weighing 30 kg.

[0051] Example 3: Component Ratio: 16% sodium humate 5% seaweed extract 3% natural organic acid 8% ammonium sulfate 7% monoammonium phosphate 4% potassium chloride 3% nano-silicon 3% polyvinyl alcohol 1% polyacrylic acid 4% calcium sulfate 2% calcium phosphate 5% amino acids 3% trace elements Steps and process parameters: Mixing and preheating: Add all components into a mixer, set the temperature at 75°C, stir for 30 minutes to ensure that all components are completely dissolved and evenly mixed.

[0052] Microbial inoculant inoculation: Add rhizobia, cellulose-decomposing bacteria, Bacillus subtilis, etc., adjust the temperature to 28°C and the humidity to 55%, cultivate for 18 hours to ensure microbial activity.

[0053] Granulation and coating: Granulate the cultured mixture through a rotary drum granulator, set the temperature at 65°C, the humidity at 30%, and the granulation time at 6 minutes. After granulation, the fertilizer granules are coated with a composite material of polyvinyl alcohol and nano-silicon, and the coating thickness is 8%.

[0054] Fermentation: Put the coated granules into a fermentation device, set the fermentation temperature at 27°C, control the humidity at 50%, and the fermentation time at 12 days to enhance nutrient conversion and organic matter decomposition.

[0055] Drying: Treat the fermented fertilizer granules in a dryer, set the temperature at 60°C, and the drying time at 3 hours to ensure that the moisture content of the granules is reduced to less than 3%.

[0056] Packaging: Conduct a quality inspection on the dried fertilizer, and after meeting the requirements, carry out packaging. Each bag of fertilizer weighs 25 kg.

[0057] Example 4: Component ratio: 13% sodium humate 6% seaweed extract 3% natural organic acid 9% ammonium sulfate 6% monoammonium phosphate 4% potassium chloride 4% nano-silicon 2% polyvinyl alcohol 3% polyacrylic acid 3% calcium sulfate 2% calcium phosphate 6% amino acids 3% trace elements Steps and process parameters: Mixing and preheating: Add all components into a stirrer, set the heating temperature at 70°C, and stir for 20 minutes to ensure complete dissolution and uniform distribution of the fertilizer components.

[0058] Inoculation of microbial agents: Add microbial agents such as rhizobia and cellulose-decomposing bacteria, adjust the temperature to 30°C, the humidity to 50%, and incubate for 16 hours.

[0059] Granulation: Granulate the mixture through a granulator, set the temperature at 65°C, the humidity at 30%, and the granulation time at 9 minutes to ensure uniform granules without debris.

[0060] Coating: Coat the granules with a composite material of polyacrylic acid and nano-silicon, set the coating layer thickness at 9% to ensure slow release of the fertilizer in the soil.

[0061] Fermentation: Ferment the coated granules, set the temperature at 28°C, the humidity at 50%, and the fermentation period at 14 days.

[0062] Drying and packaging: After fermentation, dry the fertilizer granules at a temperature of 60°C for 3 hours to ensure that the moisture in the granules is reduced to 5%. Finally, conduct quality inspection and packaging, with each bag weighing 25 kg.

[0063] Comparative example 1: Based on Example 1, this comparative example uses the same formula but makes fine-tuning in the following aspects: Fine-tuning content: Reduce the proportion of seaweed extract from 5% to 3%, and increase the proportion of ammonium sulfate from 10% to 12%.

[0064] Steps and process parameters: Mixing and preheating: The same as in Example 1, add all ingredients (sodium humate, seaweed extract, natural organic acids, etc.) into a stirrer, set the temperature at 65°C, and stir for 30 minutes.

[0065] Inoculation of microbial agents: Inoculate rhizobia, cellulose-decomposing bacteria, and Bacillus subtilis, adjust the incubation temperature to 28°C, control the humidity at 50%, and incubate for 12 hours.

[0066] Granulation: Set the granulator temperature at 55°C, the humidity at 30%, and the granulation time at 8 minutes, with uniform and firm granules.

[0067] Coating treatment: Coat with a composite material of polyvinyl alcohol and nano-silicon to ensure that the coating layer thickness is 7%.

[0068] Fermentation: Set the fermentation temperature at 28°C, the humidity at 45%, and the fermentation time at 10 days.

[0069] Drying and Packaging: The drying temperature is 60°C for 3 hours to ensure that the moisture content of the granules is below 5%. The packaging weight is 25 kg.

[0070] Comparison Content: This ratio tested the plant growth promotion effect of the fertilizer by reducing the proportion of seaweed extract and increasing the proportion of ammonium sulfate. Especially, the balance between the nitrogen source and the organic components on the fertilizer release rate was investigated. This comparative example mainly aimed to compare the effect of a lower proportion of seaweed extract and whether it could effectively maintain the long-term release effect of the fertilizer.

[0071] Comparative Example 2: Based on Example 2, this comparative example replaced the type of microbial inoculant and reduced the proportion of calcium phosphate simultaneously.

[0072] Fine-tuning Content: Replace Bacillus subtilis in the microbial inoculant with Bacillus licheniformis, and at the same time reduce the proportion of calcium phosphate from 3% to 2%.

[0073] Steps and Process Parameters: Mixing and Preheating: Weigh all the components (sodium humate, seaweed extract, natural organic acid, etc.) according to the ratio and put them into a mixer. Set the temperature at 70°C and stir for 30 minutes to ensure uniform mixing.

[0074] Inoculating Microbial Inoculant: Add Bacillus licheniformis and cellulose-decomposing bacteria, adjust the temperature to 28°C and the humidity to 55%, and cultivate for 12 hours.

[0075] Granulation and Coating: Granulate through a rotary drum granulator. Set the granulation temperature at 60°C, the humidity at 30%, and the granulation time at 10 minutes to ensure that the granules are uniform and firm.

[0076] Coating Treatment: Coat the granules with a polyacrylic acid and nano-silicon composite material, and the thickness of the coating layer is 10%.

[0077] Fermentation: Set the temperature at 27°C, the humidity at 45%, and the fermentation time at 14 days to ensure nutrient conversion.

[0078] Drying and Packaging: Control the drying temperature at 65°C for 2 hours to ensure that the moisture content of the granules drops below 3%. The packaging is 30 kg per bag.

[0079] Comparison Content: This comparative example used different types of microbial inoculants to analyze the activity of different inoculants and their influence on the nutrient release of the fertilizer. Reducing the proportion of calcium phosphate also made the comparative experiment focus on the phosphorus nutrient absorption of the soil and plants.

[0080] Comparative Example 3: Based on Example 3, this comparative example extended the time of the fermentation process and adjusted the dosage of polyvinyl alcohol.

[0081] Fine-tuning content: Extend the fermentation time from 12 days to 16 days, and at the same time reduce the proportion of polyvinyl alcohol from 3% to 2%.

[0082] Steps and process parameters: Mixing and preheating: Components such as sodium humate, seaweed extract, natural organic acid, ammonium sulfate, monoammonium phosphate, potassium chloride, etc. are added to the stirrer, the temperature is set at 75°C, and stirred for 20 minutes to ensure that all components are evenly distributed.

[0083] Inoculating microbial inoculant: Add rhizobia, cellulose-decomposing bacteria, Bacillus subtilis, etc., the culture temperature is set at 28°C, the humidity is 60%, and the culture time is 16 hours.

[0084] Granulation and coating: Granulate through a granulator, the temperature is set at 65°C, the humidity is 30%, and the granulation time is 6 minutes to ensure that the granules are complete.

[0085] Coating treatment: Coating is carried out using a composite material of polyvinyl alcohol and nano-silicon, the thickness of the coating layer is set at 9%, and the proportion of the coating material is reduced to achieve a higher dissolution control effect.

[0086] Fermentation: The fermentation process is extended to 16 days, the temperature is set at 25°C, and the humidity is controlled at 50%.

[0087] Drying and packaging: The drying temperature is 60°C, and the duration is 2.5 hours to ensure that the moisture content of the granules is reduced to 5%, and the packaging weight is 25 kg.

[0088] Comparison content: The purpose of extending the fermentation time is to increase the decomposition of organic components in the fertilizer and increase nutrient conversion. Reducing the amount of polyvinyl alcohol is to test whether the overall effect of the fertilizer can be improved while achieving slow release.

[0089] Comparative example 4: Based on Example 4, this comparative example fine-tuned the time and temperature of the granulation process and increased the proportion of trace elements.

[0090] Fine-tuning content: Extend the granulation time to 12 minutes, lower the temperature to 50°C, and at the same time increase the proportion of trace elements from 3% to 5%.

[0091] Steps and process parameters: Mixing and preheating: All components (sodium humate, seaweed extract, natural organic acid, etc.) are weighed according to the proportion and put into the stirrer, the temperature is set at 70°C, and the stirring time is 30 minutes to ensure that the components are evenly dissolved.

[0092] Inoculating microbial inoculant: Add microbial inoculants such as rhizobia and cellulose-decomposing bacteria, the culture temperature is set at 30°C, the humidity is 55%, and cultured for 16 hours.

[0093] Granulation: Granulation is carried out by a rotary drum granulator, with the temperature set at 50 °C, the humidity adjusted to 30%, and the granulation time extended to 12 minutes to ensure uniform particle size.

[0094] Coating treatment: The particles are coated with a composite material of polyacrylic acid and nano-silicon, and the coating thickness is set at 10%.

[0095] Fermentation: The fermentation temperature is set at 28 °C, the humidity is 50%, and the fermentation time is 14 days to promote the decomposition of organic components.

[0096] Drying and packaging: The fermented particles are dried at a temperature of 60 °C for 2 hours to ensure that the moisture content of the particles is reduced to less than 5%. Each bag of fertilizer weighs 25 kg after packaging.

[0097] Experiment 1: Comparative experiment on nutrient release rate Purpose: To compare the differences in fertilizer release rate between the examples and comparative examples of the present invention, and to verify the effect of the slow-release technology adopted by the present invention.

[0098] Experimental design: Experimental samples: Example 1 (as the test group): Contains 10% sodium humate, 5% seaweed extract, 2% natural organic acid and other components.

[0099] Comparative example 1 (as the control group): The seaweed extract is modified (reduced to 3%) and ammonium sulfate is increased (increased to 12%), and other components are the same as those in Example 1.

[0100] Experimental method: The fertilizer samples are applied to the soil at a certain weight (20 g per group). The soil selected is neutral soil with a pH value of 7, loose and rich in organic matter.

[0101] The concentration of dissolved nutrients (nitrogen, phosphorus, potassium, etc.) in the soil is regularly collected by a decomposition rate test device (such as the leaching method) at time intervals of 24 hours, 48 hours, 72 hours and one week.

[0102] Record the fertilizer dissolution rate and compare it with the release rate of the standard fertilizer.

[0103] Experimental setup: The experiment is repeated 3 times, and 5 parallel samples are set for each experiment.

[0104] Measure the concentration of each element in the soil and analyze the slow-release effect of the fertilizer.

[0105] Comparison content: Compare the nutrient release rates of Example 1 and Comparative Example 1 to verify the effect of the coating treatment technology adopted in the present invention and reduce the rapid dissolution of fertilizers and nutrient loss.

[0106] Experiment 2: Microbial Activity and Soil Improvement Effect Purpose: Verify the improvement of soil health and fertilizer effect by using microbial inoculants (rhizobia, cellulose-decomposing bacteria, etc.) in the present invention.

[0107] Experimental Design: Experimental Samples: Example 2 (as the test group): Adopt rhizobia, cellulose-decomposing bacteria and Bacillus subtilis, and other components are the same as those in Example 2.

[0108] Comparative Example 2 (as the control group): Only use rhizobia, and the proportion of trace elements is increased from 3% to 5%, and other components are the same as those in Example 2.

[0109] Experimental Method: Apply fertilizers of different samples to a 10-square-meter soil area and plant the same type of leguminous plants (such as soybeans).

[0110] After the fertilizer application, sample the microbial activity (such as the number of rhizobia and cellulose-decomposing bacteria) and soil organic matter content in the soil every two weeks.

[0111] At the same time, monitor the growth of plants, including root growth, stem and leaf development, flowering and fruiting.

[0112] Experimental Setup: Set up 3 different areas as the control group and the experimental group, repeat the experiment 3 times, and apply fertilizers evenly to each group.

[0113] Sample and measure the soil microbial activity and the growth status of plants every month.

[0114] Comparison Content: Compare the differences between Example 2 and Comparative Example 2 in microbial community activity and soil improvement effect (such as organic matter decomposition and nitrogen fixation), and verify the improvement effect of multiple microbial inoculants on soil health and fertilizer utility.

[0115] Experiment 3: Crop Growth Promotion Effect Purpose: Verify the differences in crop growth promotion effects between the examples and comparative examples of the present invention, especially the influence on the crop growth cycle.

[0116] Experimental Design: Experimental Samples: Example 3 (as the test group): Contains 16% sodium humate, 5% seaweed extract and other components.

[0117] Comparative Example 3 (as a control group): Compared with Example 3, the proportion of seaweed extract was reduced by 4% and the proportion of polyvinyl alcohol was increased by 4%, while other components remained unchanged.

[0118] Experimental method: The same type of tomato plants were selected as crops for the experiment, and the fertilizers prepared in Example 3 and Comparative Example 3 were applied respectively.

[0119] During the growth period, indicators such as plant height, number of leaves, and root weight were measured monthly.

[0120] At the same time, the changes in soil nutrient content (nitrogen, phosphorus, potassium, and trace elements) were measured to ensure the effects of different fertilizers on plants.

[0121] Experimental setup: The experiment was divided into three groups (Example 3, Comparative Example 3, and blank control group), with 10 tomato plants in each group.

[0122] The measurement period was the complete growth cycle from planting to flowering and fruiting (about 3 months).

[0123] Comparison content: Compare the differences between Example 3 and Comparative Example 3 in terms of plant growth rate, root growth, leaf development, etc., and focus on verifying the effects of the coating material and seaweed extract in promoting plant growth.

[0124] Experiment 4: Verification of fertilizer stability and long-term effects Purpose: Through comparison, verify the innovation of the present invention in terms of fertilizer stability and long-term effects.

[0125] Experimental design: Experimental samples: Example 4 (as a test group): Contains 13% sodium humate, 6% seaweed extract, etc., and the fermentation time is 14 days.

[0126] Comparative Example 4 (as a control group): Uses the same formula, but the fermentation time is 8 days.

[0127] Experimental method: The fertilizer samples were applied to the long-term test soil (10 g of fertilizer per square meter), and the growth status of crops (such as wheat) was continuously observed for 12 months.

[0128] The changes in soil nutrients (nitrogen, phosphorus, potassium), soil pH value, and microbial community were measured monthly. Record relevant data such as crop growth rate and yield.

[0129] Experimental setup: The experiment was divided into two groups (Example 4, Comparative Example 4), with 15 wheat plants tested in each group.

[0130] Measure the nutrient levels and crop yields once a month for 12 consecutive months.

[0131] Comparison content: Compare the differences between Example 4 and Comparative Example 4 in terms of fertilizer stability and crop yields, and verify the impact of extended fermentation time on the long-term effects of fertilizers, especially the positive effects on soil health and long-term crop growth.

[0132] Experiment 1: Nutrient Release Rate Comparison Experiment Experiment description: To verify the differences in nutrient release rates between the examples and comparative examples of the present invention, this experiment was designed. In the experiment, common soil types (pH 7, neutral loose soil) were selected, and two different fertilizer formulations were applied: Example 1 (as the test group) and Comparative Example 1 (as the control group). The experiment measured the dissolution of fertilizers in the soil, tested the rate of nutrient release from the fertilizers, and compared the slow-release effects.

[0133] Experimental steps: Prepare 10 kg of soil, place it in experimental containers (about 5 kg of soil per container), and apply 20 g of fertilizer (the same amount of fertilizer is applied to each group). The experimental group applies the fertilizer of Example 1, and the control group applies the fertilizer of Comparative Example 1.

[0134] Place the soil containers in two different environments, maintain the temperature at 25 °C and the humidity at 50%, and sample once every 24 hours, 48 hours, 72 hours, and 1 week to collect the soil solution and test the concentrations of elements such as nitrogen, phosphorus, and potassium.

[0135] Use the leaching method to determine the amount of nutrients dissolved in the soil, and use the ion-selective electrode method to test the concentrations of nitrogen, phosphorus, and potassium to ensure the accuracy of the test.

[0136] Take the soil solution for analysis at each time point, and record the nutrient release of each group of fertilizers at different time periods.

[0137] Experimental data: Table name: Experimental Data on the Comparison of Nutrient Release Rates of Fertilizers Summary: The fertilizer used in Example 1 has a relatively obvious slow-release effect, with a lower and more stable release rate compared to Comparative Example 1. From the experimental data, it can be seen that the nitrogen, phosphorus, and potassium release amounts of Example 1 are higher than those of Comparative Example 1 from 24 hours to 72 hours. This indicates that the coating material (a composite of polyvinyl alcohol and nano-silicon) in Example 1 effectively slows down the release rate of the fertilizer. Compared with the fertilizer of Comparative Example 1, the nutrients in Example 1 are released into the soil more smoothly, reducing the pollution to the environment caused by the loss of quickly soluble nutrients.

[0138] From a mechanistic perspective, the coating technology used in the present invention is the core of slowing down the dissolution of the fertilizer. The protective layer formed by polyvinyl alcohol and nano-silicon effectively controls the dissolution rate of the fertilizer, avoiding the phenomenon of rapid release of elements such as nitrogen, phosphorus, and potassium in the fertilizer at the initial stage of application. This slow-release effect not only optimizes the nutrient supply, extends the validity period of the fertilizer, but also reduces the short-term impact of excessive nutrient release on the soil, enabling plants to stably absorb nutrients over a longer period.

[0139] In addition, as time goes by, the experimental data also show that the fertilizer in Example 1 can maintain nutrient release for a long time, and the release rate shows a gradually increasing trend. This indicates that the nutrient supply of the fertilizer can be continuously effective throughout the entire growth cycle of the crop, without the need for frequent fertilization, thereby reducing the fertilization frequency and improving the use efficiency of the fertilizer.

[0140] Experiment 2: Microbial Activity and Soil Improvement Effect Experiment Description: To evaluate the improvement of soil health and fertilizer effect by using the microbial inoculant in the present invention, this experiment designed a comparison between Example 2 and Comparative Example 2. The experiment focused on testing the role of the microbial inoculant in improving soil structure, promoting the degradation of organic matter, and enhancing fertilizer effect. By observing soil microbial activity and plant growth status, it was verified whether the microbial formula in the present invention could improve the fertilizer effect.

[0141] Experimental Steps: Preparation of Experimental Samples: Example 2 (test group): Use a combination of rhizobia, cellulose-decomposing bacteria, and Bacillus subtilis.

[0142] Comparative Example 2 (control group): Only use rhizobia and increase the proportion of trace elements to 5%, with other formulations being the same as those in Example 2.

[0143] Experimental Method: The experiment was carried out in the same soil, and neutral and loose soil was selected, with 20 g of fertilizer applied per square meter. Each fertilizer was applied 3 times, with an interval of 30 days each time.

[0144] Meanwhile, record the changes in the microbial community in the soil, especially the quantities of rhizobia and cellulose-decomposing bacteria. Take soil samples monthly to detect the microbial density and species.

[0145] Select leguminous plants as experimental crops and monitor their growth. Record the growth status of the plants, such as the root weight, stem and leaf length, flowering, and fruiting, monthly.

[0146] Experimental setup: The experimental area is divided into three groups, namely Example 2, Comparative Example 2, and a control group without fertilizer. Apply the fertilizer to 3 replicate samples in each group.

[0147] Regularly measure the organic matter content, nutrient (nitrogen, phosphorus, potassium) concentration, and pH value in the soil, and compare them with the soil microbial activity data.

[0148] Experimental data collection: Collect soil samples and plant growth data once a month, and record various indicators of crop growth, such as plant height, leaf area, root weight, number of pods, etc.

[0149] Experimental data: Table name: Experimental data on microbial activity and soil improvement effect Summary: The results of this experiment show that the fertilizer in Example 2 is significantly superior to Comparative Example 2 in terms of soil microbial activity and plant growth. It can be seen from the data that the quantities of rhizobia and cellulose-decomposing bacteria in Example 2 are both higher than those in Comparative Example 2, indicating that the combined use of multiple microorganisms significantly promotes the richness of the soil microbial community and accelerates the decomposition process of organic matter. This effect is directly translated into the acceleration of plant growth, and the plant height, root weight, and number of pods are all significantly higher than those of the control group and Comparative Example 2.

[0150] According to the mechanism analysis, the multiple microbial agents added in Example 2 cooperate with each other and can decompose the organic matter in the soil more efficiently and release nutrients that can be absorbed by plants. Rhizobia contribute to nitrogen fixation and enhance soil fertility, while cellulose-decomposing bacteria accelerate the decomposition process of complex organic substances in the soil and improve the availability of organic components in the fertilizer. This microbial community formulation not only effectively improves the biological activity of the soil but also increases the soil fertility, promoting the growth and nutrient absorption of plant roots.

[0151] Compared with Comparative Example 2, although it also used rhizobia, the effect of using only a single strain was far less than that of a combination of multiple strains. The application of a single strain, although it could promote the absorption of some nutrients, did not comprehensively improve soil microbial activity and plant growth as in Example 2. Therefore, by reasonably proportioning multiple strains in Example 2, not only was the fertilizer effect optimized, but soil health was also improved and crop yield was increased. This is also one of the innovative points of the technical solution of the present invention.

[0152] Experiment 3: Crop growth promotion effect Experiment description: This experiment aimed to evaluate the differences in crop growth promotion effects between Example 3 and Comparative Example 3. Through comparative experiments, the effects of the fertilizer in Example 3 on plant growth rate, root development, plant yield, etc. were verified, with a focus on the comprehensive impact of nutrient release, soil improvement, and microbial activity of the fertilizer on crop growth.

[0153] Experiment steps: Preparation of experimental samples: Example 3 (test group): Containing 16% sodium humate, 5% seaweed extract, etc.

[0154] Comparative Example 3 (control group): Having the same formula as Example 3, but adjusting the proportion of seaweed extract from 5% to 4% and increasing the proportion of polyvinyl alcohol to 4%.

[0155] Experiment method: The same soil type (neutral soil) was used in the experiment, and 20 g of fertilizer was applied per square meter (the same amount of fertilizer was applied in both groups).

[0156] Leguminous plants (such as soybeans) were selected as the crops, and the fertilizers of Example 3 and Comparative Example 3 were applied respectively.

[0157] At each stage of plant growth (seedling stage, growth stage, flowering stage, fruiting stage), growth indicators such as plant height, number of leaves, root weight, flowering time, and number of pods were recorded.

[0158] Experiment settings: Three replicate samples were set up in each of the experimental group and the control group, with at least 10 plants in each group. The repeatability of the experiment was ensured by controlling the temperature (25°C), humidity (50%), and light intensity (12 hours / day) in the experimental environment.

[0159] Data collection and recording: Data was collected monthly, and indicators such as plant growth status, root development, and number of leaves were recorded.

[0160] The concentrations of nutrients such as nitrogen, phosphorus, and potassium in the soil were measured every two weeks, and the changes in soil organic matter were detected.

[0161] When the plants are flowering and fruiting, record the number of pods per plant and conduct the final yield statistics.

[0162] Experimental data: Table name: Experimental data on the effect of promoting crop growth Summary: From the experimental results, the fertilizer in Example 3 significantly improved the growth rate, root development and yield of plants. Especially in terms of plant height, root weight and the number of pods, the performance of Example 3 was far better than that of Comparative Example 3. Over time, the growth rate of the experimental group plants during the emergence stage and the growth stage was significantly higher than that of the control group, indicating that the fertilizer formula in the present invention can accelerate the early growth stage of crops, promote root growth, and enhance the plant's ability to absorb water and nutrients.

[0163] From a mechanistic perspective, various microbial inoculants (such as rhizobia and cellulose-decomposing bacteria) in Example 3 formed a healthy microbial community in the soil. These microorganisms decomposed the organic matter in the soil and provided more nutrients that can be absorbed by plants. At the same time, the combination of sodium humate and seaweed extract also played a role in improving the soil structure, increasing soil fertility, and promoting the growth of crop roots. The use of polyvinyl alcohol and polyacrylic acid coating materials in the fertilizer enabled the slow release of nutrients, reduced nutrient loss, and ensured a stable nutrient supply for crops at different growth stages.

[0164] When comparing with Comparative Example 3, it can be found that although the proportion of trace elements was increased, the single microbial inoculant and other formulation adjustments did not achieve the effect of Example 3 in terms of growth rate and root development. The growth performance of the plants in Comparative Example 3 was slightly lagged, indicating that the combined application of multiple microbial inoculants was more effective in promoting plant growth and soil health. This also shows that the present invention can better meet the nutritional needs of plants and improve the fertilizer effect through the combined action of multiple strains and the optimization of the microbial community.

[0165] Experiment 4: Verification of fertilizer stability and long-term effect Experiment description: This experiment aims to verify the stability of the fertilizer of the present invention and its performance in the long-term effect during the crop growth process. By comparing the fertilizers of Example 4 and Comparative Example 4, test the ability of the fertilizer to release nutrients in the soil in the long term and its continuous impact on crop growth. This experiment focuses on whether the fertilizer can stably release nutrients throughout the entire growth cycle of the crop and have a lasting impact on crop growth and soil health.

[0166] Experimental steps: Preparation of experimental samples: Example 4 (test group): It contains components such as 13% sodium humate and 6% seaweed extract, and the fermentation time is 14 days.

[0167] Comparative Example 4 (control group): It is the same as Example 4, but the fermentation time is 8 days, and a relatively small amount of trace elements (2%) is used.

[0168] Experimental method: The same soil type (neutral soil) was selected for the experiment, and the amount of fertilizer applied was 20 g per square meter (the amount of fertilizer applied in both groups was the same).

[0169] Wheat was selected as the crop to observe its growth process. The growth indicators such as the height of the plant, root weight, flowering, and fruiting were recorded monthly, and soil samples were taken regularly to measure the nutrient concentrations such as nitrogen, phosphorus, and potassium in the soil.

[0170] The soil pH value and the change in organic matter content were measured every three months.

[0171] Experimental setup: Three groups were set up in the experiment (Example 4, Comparative Example 4, and a control group without fertilizer), and 20 wheat plants were tested in each group.

[0172] The measurement period was the entire growth cycle of wheat from sowing to harvesting (about 6 months).

[0173] Data collection and recording: Data such as the height of the plant, number of leaves, root weight, flowering period, and number of fruits were recorded monthly.

[0174] Soil samples were taken every two weeks to analyze the concentrations of elements such as nitrogen, phosphorus, and potassium, soil organic matter, and pH value in the soil.

[0175] Experimental data: Table name: Experimental data on fertilizer stability and long-term effects Summary: The experimental data showed that the fertilizer in Example 4 showed significant advantages during the crop growth process, especially in terms of plant height, root weight, and number of pods. As the experiment progressed, the wheat plants in Example 4 continued to lead Comparative Example 4 and the control group without fertilizer in various growth indicators. From the change in soil nutrient content, the fertilizer applied in Example 4 continuously released nutrients, ensuring the stable supply of key elements such as nitrogen, phosphorus, and potassium in the soil, and the soil pH value and organic matter content were relatively balanced.

[0176] From a mechanism analysis perspective, the fertilizer formula adopted in the present invention combines the dual advantages of slow release and sustained release of nutrients. By using a longer fermentation time and optimizing the proportion of trace elements in the fertilizer, the fertilizer in Example 4 can release nutrients smoothly during the crop growth cycle, avoiding the common problems of rapid release and nutrient loss of traditional fertilizers. During the fermentation process, the activity of microorganisms promotes the transformation of fertilizer components, enabling nutrients to be absorbed by plants in a more stable form and not easily lost to the environment. This slow release effect plays an important role in improving soil quality and enhancing crop stress resistance.

[0177] Comparing with Comparative Example 4, extending the fermentation time significantly enhances the stability of the fertilizer and the persistence of nutrient release. The shorter fermentation time results in a faster release rate of the fertilizer in Comparative Example 4. Although it performs well initially, as time goes by, the nutrients in the fertilizer are gradually consumed and fail to maintain a continuous effect. Example 4 significantly improves the growth effect of crops by precisely controlling the nutrient release rate and the transformation of fertilizer components, demonstrating that the fertilizer formula adopted in the present invention can provide a stable nutrient supply in the long term, ultimately increasing crop yields and soil health.

[0178] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Bio-organic compound fertilizer, characterized in that: Contains the following ingredients: 10% to 20% sodium humate; 2% to 6% seaweed extract; 1% to 3% natural organic acid; 5% to 15% ammonium sulfate; 4% to 10% monoammonium phosphate; 3% to 7% potassium chloride; 2% to 5% nano silicon; 2% to 4% polyvinyl alcohol; 1% to 3% polyacrylic acid; 2% to 5% calcium sulfate; 1% to 4% calcium phosphate; 3% to 6% amino acids; 2% to 4% trace elements.

2. The bio-organic composite fertilizer according to claim 1, characterized in that: The sodium humate can be obtained by extraction or synthesis of humic acid, and the humic acid can be obtained through an artificially controlled organic matter degradation process of humus.

3. The bio-organic composite fertilizer according to claim 1, characterized in that: The seaweed extract is made from seaweed extracting liquid, which can be obtained by boiling and enzymolyzing seaweed plants including brown algae and red algae. The trace elements include zinc and boron.

4. A method for preparing a bio-organic composite fertilizer, applied to the bio-organic composite fertilizer according to claims 1-3, characterized in that: The following steps are involved: Sodium humate, seaweed extract, natural organic acid, ammonium sulfate, monoammonium phosphate, potassium chloride, nano silicon, polyvinyl alcohol, polyacrylic acid, calcium sulfate and calcium phosphate are pretreated and mixed, the pretreatment step comprising heating the components to 60° C. to 80° C. at a certain temperature and mixing to ensure uniform distribution and reaction of the components; Inoculating the mixture with a microbial agent for culturing, wherein the microbial agent includes rhizobia, cellulose decomposing bacteria, and beneficial bacteria of Bacillus subtilis, and the activity of the microbial agent is enhanced by adjusting appropriate culture conditions; Granulating the mixture and coating it with a coating material, using appropriate moisture and temperature to form uniform particles during the granulation process, and controlling the release rate of fertilizer nutrients with the coating material; Fermentation step to adjust the nutrients in the fertilizer. Specific microbial communities are added during the fermentation process to promote the decomposition of organic matter and the conversion of nutrients; Drying and packaging. The drying process ensures that the granules are stored stably at low humidity. Quality control is performed during packaging to ensure the long-term storage stability of the fertilizer.

5. The method for preparing a biological organic compound fertilizer according to claim 4, characterized in that: The pretreatment process includes heating the mixture to 60° C. to 80° C. and maintaining the temperature for 2 to 3 hours. This temperature range helps to accelerate the reaction between humic acid and other components.

6. The method for preparing a biological organic compound fertilizer according to claim 4, characterized in that: The microbial agent comprises rhizobium, cellulose decomposing bacteria and bacillus subtilis. After inoculation, the growth and activity of the agent in the fertilizer are promoted by controlling appropriate temperature, humidity and time conditions.

7. The method for preparing a biological organic composite fertilizer according to claim 4, characterized in that: The granulation step includes granulating with a rotary drum granulator under the condition of controlling the temperature to be 50° C. to 70° C. for 5 to 10 minutes to ensure that the granules are solid and not broken under suitable temperature and humidity conditions and that the granules are not adhered to each other.

8. The method for preparing a biological organic compound fertilizer according to claim 4, characterized in that: The coating treatment uses a composite material of polyvinyl alcohol or polyacrylic acid and nano-silicon for coating. The coating material helps to form a moisture-proof layer, slowing down the dissolution rate of the fertilizer, thereby achieving a slow-release function.

9. The method for preparing a biological organic compound fertilizer according to claim 4, characterized in that: The fermentation step is carried out at a temperature of 25°C to 30°C and a humidity of 40% to 50% for 7 to 14 days. The temperature and humidity conditions are conducive to the stable growth and metabolism of microorganisms.

10. The method for preparing a biological organic compound fertilizer according to claim 4, characterized in that: The drying step is carried out at 50° C. to 70° C. for 2 to 4 hours. By adjusting the drying time and temperature, it is ensured that the moisture in the fertilizer particles is completely removed.

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