Bio-organic fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of bio-organic fertilizers, in particular to a bio-organic fertilizer and a preparation method thereof. The bio-organic fertilizer is prepared from the following raw materials in parts by weight: 60-80 parts of a base material, 20-30 parts of an auxiliary material, 10-20 parts of powder, 8-12 parts of a paste material and 1-3 parts of a complex microbial inoculant, the base material is a mixture of straws, coconut shells, peanut shells, bean dregs, distillers' grains and sawdust. According to the biological organic fertilizer disclosed by the invention, powder is added in the preparation process of the biological organic fertilizer, and a calcium carbonate component of oyster shells is utilized, so that rich calcium elements can be provided for plant root systems after the fertilizer is applied, and the stability of the plant root systems is facilitated; the boron element can influence the community structure and diversity of soil microorganisms, can help plant root systems to absorb nutrients, enhances the nutrient supply of the bio-organic fertilizer to plants, and effectively improves the use effect of the bio-organic fertilizer.

Description

Technical Field

[0001] This invention relates to the field of bio-organic fertilizer technology, specifically to a bio-organic fertilizer and its preparation method. Background Technology

[0002] Bio-organic fertilizer is a type of high-quality fertilizer, rich in nitrogen, phosphorus, potassium and other nutrients, as well as a large number of beneficial microorganisms. It can not only enrich the soil and improve the soil structure, but also provide long-lasting nutrition for crops, enhance crop disease resistance, and contribute to the development of green agriculture.

[0003] In existing technologies, after bio-organic fertilizers come into contact with the soil, rainfall increases the soil's moisture content, causing the bio-organic fertilizer to dissolve rapidly. This results in excessively rapid nutrient loss from the compound fertilizer, affecting the nutrient supply effect of the bio-organic fertilizer. Therefore, this invention provides a bio-organic fertilizer and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a bio-organic fertilizer and its preparation method. The bio-organic fertilizer prepared by this invention not only has good plant growth status, but also excellent yield data, effectively improving the performance of the bio-organic fertilizer.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a bio-organic fertilizer comprising the following raw materials in parts by weight: 60-80 parts base material, 20-30 parts auxiliary material, 10-20 parts powder, 8-12 parts paste, and 1-3 parts compound microbial agent;

[0007] The base material is a mixture of straw, coconut shell, peanut shell, soybean residue, distiller's grains, and sawdust, and the mass ratio of straw, coconut shell, peanut shell, soybean residue, distiller's grains, and sawdust is 10:(0.2~0.4):(0.4~0.6):(2~4):(1~3):(3~5);

[0008] The straw, coconut shells, and peanut shells are pretreated before being mixed to prepare the base material;

[0009] The auxiliary material is a mixture of chicken manure, cow manure, and biogas residue, and the mass ratio of chicken manure, cow manure, and biogas residue is 1:(0.1-0.3):(0.6-0.8).

[0010] Furthermore, the powder is prepared by the following method: oyster shells are selected as the base material. The oyster shells are washed, drained, and dried, and then ground to obtain oyster shell powder with a particle size of 80-100 μm. The oyster shell powder is mixed with boron trioxide and added to a muffle furnace. Nitrogen gas is introduced into the muffle furnace, and the heating rate is set to 8-10℃ / min. The temperature is raised to 450-550℃ and held for 2-4 hours to obtain the powder.

[0011] Furthermore, the boron trioxide is selected as a powder with a particle size of 20-40 μm.

[0012] Further, the paste is prepared by the following method: acrylic acid, methacrylic acid, and water are mixed in a reactor at a mass ratio of 1:(0.4-0.6):(3-5). The reactor is heated to 40-50°C and stirred at 120-160 r / min for 6-10 min. Sodium hydroxide is added during the stirring process, with the mass of sodium hydroxide being 20-30% of the mass of acrylic acid. Then, an additive is added and stirred until homogeneous, with the mass of the additive being 6-8% of the mass of acrylic acid. After further mixing, alkylphenol polyoxyethylene ether and sodium alginate are added. The reactor is heated to 60-70°C and stirred at 120-160 r / min for 20-30 min to obtain the paste.

[0013] Furthermore, the mass of the alkylphenol polyoxyethylene ether is 10-20% of the mass of acrylic acid, and the mass of the sodium alginate is 4-6 times the mass of the alkylphenol polyoxyethylene ether.

[0014] Further, the additive is selected as a mixture of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate, and the mass ratio of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate is 1:(0.4~0.6):(0.06~0.08).

[0015] Furthermore, the pretreatment method for the straw, coconut shell, and peanut shell is as follows: the straw, coconut shell, and peanut shell are crushed, and after crushing, they are sent to an oven. The oven is set to a high temperature of 95-105℃ for 50-60 minutes. The resulting product is then immersed in clean water with sodium hydroxide solution added, and soaked for 4-6 hours. After soaking, the product is rinsed and drained. The resulting product is inoculated with white rot fungus solution and fermented in a ventilated environment for 16-20 days, turning the pile every 2 days to complete the pretreatment of the straw, coconut shell, and peanut shell.

[0016] Furthermore, the mass concentration of the sodium hydroxide solution is 1-3%, and the mass of the sodium hydroxide solution is 2-4% of the mass of the straw.

[0017] Further, the compound microbial agent is prepared by the following method: Rhizobium, Bacillus amyloliquefaciens, and Bacillus subtilis are placed in a fermentation medium and cultured at a temperature of 30-32°C, a humidity of 70-80%, and a pH of 7-7.2 for 4-6 days to obtain the compound microbial agent, wherein the mass ratio of Rhizobium, Bacillus amyloliquefaciens, and Bacillus subtilis is 1:(4-6):(1-3).

[0018] Secondly, the present invention also provides a method for preparing bio-organic fertilizer, comprising the following steps: weighing base material, auxiliary material, powder material, and paste material as needed and adding them to a mixer; setting the mixer to 200-300 r / min and stirring for 20-30 min; after the stirring is completed, adding water (50-60% of the product mass in the mixer); setting the mixer to 300-400 r / min and stirring for 10-20 min; then adding compound microbial agent; setting the mixer to 80-100 r / min and stirring for 4-6 min to obtain a mixture; spreading the mixture flat outdoors to dry; after drying, piling it up for fermentation; the fermentation time is 23-25 ​​days; turning the pile every 3-5 days from the 3rd to 5th day of fermentation to obtain bio-organic fertilizer.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, the addition of powder during the preparation of bio-organic fertilizer utilizes the calcium carbonate component of oyster shells, which provides abundant calcium to the plant roots after fertilization, thus promoting root stability. After the oyster shell powder is mixed with boron trioxide, the boron element can influence the community structure and diversity of soil microorganisms, helping the plant roots absorb nutrients, enhancing the nutritional supply of the bio-organic fertilizer to the plant, and effectively improving the application effect of the bio-organic fertilizer.

[0021] 2. In this invention, the addition of paste during the preparation of bio-organic fertilizer, wherein sodium alginate, as a hydrophilic polymer compound, can form a gel-like substance in the soil, effectively improving the soil's water retention capacity, so that the bio-organic fertilizer slows down loss when it comes into contact with the soil, and the fertilizer can be kept in a fixed position to continuously release fertility. Through the modification treatment of sodium alginate, it can play a thickening role, further improving the nutrient supply performance of bio-organic fertilizer.

[0022] 3. In this invention, the pretreatment of straw, coconut shells and peanut shells before mixing and preparing the base material can regulate the microbial community and reduce nitrogen loss after preheating. After fermentation by white rot fungi, the composite structure of the fiber can be destroyed, allowing the nitrogen, phosphorus and potassium components contained in the material to be released, effectively improving the beneficial components of the bio-organic fertilizer. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0025] Example 1:

[0026] A bio-organic fertilizer comprises the following raw materials in parts by weight: 60 parts base material, 20 parts auxiliary material, 10 parts powder, 8 parts paste, and 1 part compound microbial agent;

[0027] The base material is a mixture of straw, coconut shell, peanut shell, soybean residue, distiller's grains and sawdust. The mass ratio of straw, coconut shell, peanut shell, soybean residue, distiller's grains and sawdust is 10:(0.2):(0.4):(2):(1):(3).

[0028] Straw, coconut shells, and peanut shells are pretreated before being mixed to prepare the base material;

[0029] The auxiliary material is a mixture of chicken manure, cow manure and biogas residue, with a mass ratio of 1:(0.1):(0.6).

[0030] Furthermore, the powder is prepared by the following method: oyster shells are selected as the base material. After the oyster shells are cleaned, drained, and dried, they are ground to obtain oyster shell powder with a particle size of 80μm. The oyster shell powder is mixed with boron trioxide and added to a muffle furnace. Nitrogen gas is introduced into the muffle furnace, the heating rate is set to 8℃ / min, the temperature is raised to 450℃, and held for 2 hours to obtain the powder.

[0031] Furthermore, boron trioxide is selected as a powder with a particle size of 20μm.

[0032] Further, the paste is prepared by the following method: acrylic acid, methacrylic acid and water are mixed in a reactor, the mass ratio of acrylic acid, methacrylic acid and water is 1:(0.4):(3), the reactor is set to heat up to 40°C, the stirring speed is 120 r / min, and the mixture is kept warm and stirred for 6 min. Sodium hydroxide is added during the heat preservation and stirring process, the mass of sodium hydroxide is 20% of the mass of acrylic acid, then additives are added and stirred evenly, the mass of additives is 6% of the mass of acrylic acid, and after further mixing, alkylphenol polyoxyethylene ether and sodium alginate are added. The reactor is set to heat up to 60°C, the stirring speed is 120 r / min, and the mixture is kept warm and stirred for 20 min to obtain the paste.

[0033] Furthermore, the mass of alkylphenol polyoxyethylene ether is 10% of the mass of acrylic acid, and the mass of sodium alginate is 4 times the mass of alkylphenol polyoxyethylene ether.

[0034] Furthermore, the additive is a mixture of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate, with a mass ratio of 1:(0.4):(0.06).

[0035] Furthermore, the pretreatment method for straw, coconut shells, and peanut shells is as follows: the straw, coconut shells, and peanut shells are crushed and then sent to an oven. The oven is set to 95℃ for 50 minutes. The resulting product is then immersed in clean water with sodium hydroxide solution added, and soaked for 4 hours. After soaking, the product is rinsed and drained. The resulting product is inoculated with white rot fungus solution and fermented in a ventilated environment for 16 days, turning the pile every 2 days to complete the pretreatment of straw, coconut shells, and peanut shells.

[0036] Furthermore, the mass concentration of the sodium hydroxide solution is 1%, and the mass of the sodium hydroxide solution is 2% of the mass of the straw.

[0037] Further, the compound microbial agent is prepared by the following method: Rhizobium, Bacillus amyloliquefaciens and Bacillus subtilis are placed in a fermentation medium and cultured at a temperature of 30°C, a humidity of 70% and a pH of 7 for 4 days to obtain the compound microbial agent, wherein the mass ratio of Rhizobium, Bacillus amyloliquefaciens and Bacillus subtilis is 1:(4):(1).

[0038] A method for preparing bio-organic fertilizer includes the following steps: weighing base material, auxiliary material, powder material, and paste material as needed and adding them to a mixer; setting the mixer to 200 r / min and stirring for 20 min; after the stirring is completed, adding water (50% of the product mass in the mixer); setting the mixer to 300 r / min and stirring for 10 min; then adding compound microbial agent; setting the mixer to 80 r / min and stirring for 4 min to obtain a mixture; spreading the mixture flat outdoors to dry; after drying, piling it up for fermentation; the fermentation time is 23 days; starting from the 4th day of fermentation, turning the pile every 4 days to obtain bio-organic fertilizer.

[0039] Example 2:

[0040] A bio-organic fertilizer comprises the following raw materials in parts by weight: 70 parts base material, 25 parts auxiliary material, 15 parts powder, 10 parts paste, and 2 parts compound microbial agent;

[0041] The base material is a mixture of straw, coconut shell, peanut shell, soybean residue, distiller's grains and sawdust, with the mass ratio of straw, coconut shell, peanut shell, soybean residue, distiller's grains and sawdust being 10:(0.3):(0.5):(3):(2):(4);

[0042] Straw, coconut shells, and peanut shells are pretreated before being mixed to prepare the base material;

[0043] The auxiliary material is a mixture of chicken manure, cow manure and biogas residue, with a mass ratio of 1:(0.2):(0.7).

[0044] Furthermore, the powder is prepared by the following method: oyster shells are selected as the base material. After the oyster shells are cleaned, drained, and dried, they are ground to obtain oyster shell powder with a particle size of 90μm. The oyster shell powder is mixed with boron trioxide and added to a muffle furnace. Nitrogen gas is introduced into the muffle furnace, the heating rate is set to 9℃ / min, the temperature is raised to 500℃, and held for 3h to obtain the powder.

[0045] Furthermore, boron trioxide is selected as a powder with a particle size of 30μm.

[0046] Further, the paste is prepared by the following method: acrylic acid, methacrylic acid and water are mixed in a reactor, the mass ratio of acrylic acid, methacrylic acid and water is 1:(0.5):(4), the reactor is set to heat up to 45°C, the stirring speed is 140 r / min, and the mixture is kept warm and stirred for 8 min. Sodium hydroxide is added during the heat preservation and stirring process, the mass of sodium hydroxide is 25% of the mass of acrylic acid, then additives are added and stirred evenly, the mass of additives is 7% of the mass of acrylic acid, and after further mixing, alkylphenol polyoxyethylene ether and sodium alginate are added. The reactor is set to heat up to 65°C, the stirring speed is 140 r / min, and the mixture is kept warm and stirred for 25 min to obtain the paste.

[0047] Furthermore, the mass of alkylphenol polyoxyethylene ether is 15% of the mass of acrylic acid, and the mass of sodium alginate is 5 times the mass of alkylphenol polyoxyethylene ether.

[0048] Furthermore, the additive is a mixture of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate, with a mass ratio of 1:(0.5):(0.07).

[0049] Furthermore, the pretreatment method for straw, coconut shells, and peanut shells is as follows: the straw, coconut shells, and peanut shells are crushed and then sent to an oven. The oven is set to 100℃ for 55 minutes. The resulting product is then immersed in clean water with sodium hydroxide solution added, and soaked for 5 hours. After soaking, the product is rinsed and drained. The resulting product is then inoculated with white rot fungus solution and fermented in a ventilated environment for 18 days, with the pile turned over every 2 days. This completes the pretreatment of straw, coconut shells, and peanut shells.

[0050] Furthermore, the mass concentration of the sodium hydroxide solution is 2%, and the mass of the sodium hydroxide solution is 3% of the mass of the straw.

[0051] Further, the compound microbial agent is prepared by the following method: Rhizobium, Bacillus amyloliquefaciens and Bacillus subtilis are placed in a fermentation medium and cultured at a temperature of 31°C, a humidity of 75% and a pH of 7.1 for 5 days to obtain the compound microbial agent, wherein the mass ratio of Rhizobium, Bacillus amyloliquefaciens and Bacillus subtilis is 1:(5):(2).

[0052] A method for preparing bio-organic fertilizer includes the following steps: weighing base material, auxiliary material, powder material, and paste material as needed and adding them to a mixer; setting the mixer to 250 r / min and stirring for 25 min; after the stirring is completed, adding water (55% of the product mass in the mixer); setting the mixer to 350 r / min and stirring for 15 min; then adding compound microbial agent; setting the mixer to 90 r / min and stirring for 5 min to obtain a mixture; spreading the mixture flat outdoors to dry; after drying, piling it up for fermentation; the fermentation time is 24 days; starting from the 4th day of fermentation, turning the pile every 4 days to obtain bio-organic fertilizer.

[0053] Example 3:

[0054] A bio-organic fertilizer comprises the following raw materials in parts by weight: 80 parts base material, 30 parts auxiliary material, 20 parts powder, 12 parts paste, and 3 parts compound microbial agent;

[0055] The base material is a mixture of straw, coconut shell, peanut shell, soybean residue, distiller's grains and sawdust, with the mass ratio of straw, coconut shell, peanut shell, soybean residue, distiller's grains and sawdust being 10:(0.4):(0.6):(4):(3):(5);

[0056] Straw, coconut shells, and peanut shells are pretreated before being mixed to prepare the base material;

[0057] The auxiliary material is a mixture of chicken manure, cow manure and biogas residue, with a mass ratio of 1:(0.3):(0.8).

[0058] Furthermore, the powder is prepared by the following method: oyster shells are selected as the base material. After the oyster shells are cleaned, drained, and dried, they are ground to obtain oyster shell powder with a particle size of 100μm. The oyster shell powder is mixed with boron trioxide and added to a muffle furnace. Nitrogen gas is introduced into the muffle furnace, the heating rate is set to 10℃ / min, the temperature is raised to 550℃, and held for 4 hours to obtain the powder.

[0059] Furthermore, boron trioxide is selected as a powder with a particle size of 40μm.

[0060] Further, the paste is prepared by the following method: acrylic acid, methacrylic acid and water are mixed in a reactor, the mass ratio of acrylic acid, methacrylic acid and water is 1:(0.6):(5), the reactor is set to heat up to 50°C, the stirring speed is 160 r / min, and the mixture is kept warm and stirred for 10 min. Sodium hydroxide is added during the heat preservation and stirring process, the mass of sodium hydroxide is 30% of the mass of acrylic acid, then additives are added and stirred evenly, the mass of additives is 8% of the mass of acrylic acid, and after further mixing, alkylphenol polyoxyethylene ether and sodium alginate are added. The reactor is set to heat up to 70°C, the stirring speed is 160 r / min, and the mixture is kept warm and stirred for 30 min to obtain the paste.

[0061] Furthermore, the mass of alkylphenol polyoxyethylene ether is 20% of the mass of acrylic acid, and the mass of sodium alginate is 6 times the mass of alkylphenol polyoxyethylene ether.

[0062] Furthermore, the additive is a mixture of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate, with a mass ratio of 1:(0.6):(0.08).

[0063] Furthermore, the pretreatment method for straw, coconut shells, and peanut shells is as follows: the straw, coconut shells, and peanut shells are crushed and then sent to an oven. The oven is set to 105℃ for 60 minutes. The resulting product is then immersed in clean water with sodium hydroxide solution added, and soaked for 6 hours. After soaking, the product is rinsed and drained. The resulting product is then inoculated with white rot fungus solution and fermented in a ventilated environment for 20 days, with the pile turned over every 2 days. This completes the pretreatment of straw, coconut shells, and peanut shells.

[0064] Furthermore, the mass concentration of the sodium hydroxide solution is 3%, and the mass of the sodium hydroxide solution is 4% of the mass of the straw.

[0065] Further, the compound microbial agent is prepared by the following method: Rhizobium, Bacillus amyloliquefaciens and Bacillus subtilis are placed in a fermentation medium and cultured at a temperature of 32°C, a humidity of 80% and a pH of 7.2 for 6 days to obtain the compound microbial agent, wherein the mass ratio of Rhizobium, Bacillus amyloliquefaciens and Bacillus subtilis is 1:(6):(3).

[0066] A method for preparing bio-organic fertilizer includes the following steps: weighing base material, auxiliary material, powder material, and paste material as needed and adding them to a mixer; setting the mixer to 300 r / min and stirring for 30 min; after the stirring is completed, adding water (60% of the product mass in the mixer); setting the mixer to 400 r / min and stirring for 20 min; then adding compound microbial agent; setting the mixer to 100 r / min and stirring for 6 min to obtain a mixture; spreading the mixture flat outdoors to dry; after drying, piling it up for fermentation; the fermentation time is 25 days; starting from the 5th day of fermentation, turning the pile every 5 days to obtain bio-organic fertilizer.

[0067] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain any covering material.

[0068] Comparative Example 2 differs from Example 1 in that it was not subjected to film-forming solution immersion treatment.

[0069] Comparative Example 3 differs from Example 1 in that vanadium oxysulfate was not added when preparing the film-forming solution in this comparative example.

[0070] Comparative Example 4 differs from Example 1 in that this comparative example was not treated with a soaking solution.

[0071] Performance testing: The bio-organic fertilizers prepared in Examples 1, 2, 3, 1, 2, 3, and 4 were subjected to performance tests. The test data are recorded in the table below:

[0072]

[0073] In the performance test, several experimental fields with an area of ​​10 mu were selected. The corn varieties and planting densities in the experimental fields were the same. The bio-organic fertilizers prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were applied to the experimental fields respectively. After harvest, the yield per mu was recorded. At the same time, corn plants were randomly selected to measure plant height and stem diameter. The test data are recorded in the table below.

[0074] It is evident that the plant growth status and yield data of the bio-organic fertilizers prepared in Comparative Examples 1, 2, 3, and 4 were all lower than those in Examples 1, 2, and 3. This indicates that the addition of powder during the preparation of bio-organic fertilizers, particularly the calcium carbonate component of oyster shells, provides abundant calcium to the plant roots after fertilization, which is beneficial to the stability of the plant roots. The mixing of oyster shell powder with boron trioxide allows boron to influence the community structure and diversity of soil microorganisms, helping plant roots absorb nutrients and enhancing the nutritional supply of the bio-organic fertilizer, thus effectively improving the application effect of the bio-organic fertilizer. Furthermore, the addition of paste during the preparation of bio-organic fertilizers, including sodium alginate, a hydrophilic polymer compound, which forms a gel-like substance in the soil, effectively improves the soil's water retention capacity, slowing down the loss of the bio-organic fertilizer upon contact with the soil. The fertilizer can maintain a fixed position and continuously release its fertility. Modification of sodium alginate can also thicken the fertilizer, further enhancing the nutrient supply performance of the bio-organic fertilizer.

[0075] By comparing and analyzing the relevant data in the table, it can be seen that the bio-organic fertilizer prepared by this invention not only exhibits good plant growth but also excellent yield data. This indicates that the bio-organic fertilizer provided by this invention has a broader market prospect and is more suitable for promotion.

[0076] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bio-organic fertilizer, characterized in that: It consists of the following raw materials in parts by weight: 60-80 parts base material, 20-30 parts auxiliary material, 10-20 parts powder, 8-12 parts paste, and 1-3 parts compound microbial agent; The base material is a mixture of straw, coconut shell, peanut shell, soybean residue, distiller's grains, and sawdust, and the mass ratio of straw, coconut shell, peanut shell, soybean residue, distiller's grains, and sawdust is 10:(0.2~0.4):(0.4~0.6):(2~4):(1~3):(3~5); The straw, coconut shells, and peanut shells are pretreated before being mixed to prepare the base material; The auxiliary material is a mixture of chicken manure, cow manure, and biogas residue, and the mass ratio of chicken manure, cow manure, and biogas residue is 1:(0.1-0.3):(0.6-0.8).

2. The bio-organic fertilizer according to claim 1, characterized in that, The powder is prepared by the following method: oyster shells are selected as the base material. The oyster shells are washed, drained, and dried, and then ground to obtain oyster shell powder with a particle size of 80-100 μm. The oyster shell powder is mixed with boron trioxide and added to a muffle furnace. Nitrogen gas is introduced into the muffle furnace, and the heating rate is set to 8-10℃ / min. The temperature is raised to 450-550℃ and held for 2-4 hours to obtain the powder.

3. The bio-organic fertilizer according to claim 2, characterized in that, The boron trioxide is selected as a powder with a particle size of 20-40 μm.

4. The bio-organic fertilizer according to claim 1, characterized in that, The paste is prepared by the following method: acrylic acid, methacrylic acid, and water are mixed in a reactor at a mass ratio of 1:(0.4-0.6):(3-5). The reactor is heated to 40-50°C and stirred at 120-160 r / min for 6-10 min. Sodium hydroxide is added during the stirring process, with the mass of sodium hydroxide being 20-30% of the mass of acrylic acid. Then, an additive is added and stirred until homogeneous, with the mass of the additive being 6-8% of the mass of acrylic acid. After further mixing, alkylphenol polyoxyethylene ether and sodium alginate are added. The reactor is heated to 60-70°C and stirred at 120-160 r / min for 20-30 min to obtain the paste.

5. The bio-organic fertilizer according to claim 4, characterized in that, The mass of the alkylphenol polyoxyethylene ether is 10-20% of the mass of acrylic acid, and the mass of the sodium alginate is 4-6 times the mass of the alkylphenol polyoxyethylene ether.

6. The bio-organic fertilizer according to claim 4, characterized in that, The additive is a mixture of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate, wherein the mass ratio of dodecyl polyoxyethylene ether acrylate, N,N-dimethylenebisacrylamide and ammonium persulfate is 1:(0.4-0.6):(0.06-0.08).

7. The bio-organic fertilizer according to claim 1, characterized in that, The pretreatment method for straw, coconut shells, and peanut shells is as follows: the straw, coconut shells, and peanut shells are crushed and then sent to an oven. The oven is set to a high temperature of 95-105℃ for 50-60 minutes. The resulting product is then immersed in clean water with sodium hydroxide solution added, and soaked for 4-6 hours. After soaking, the product is rinsed and drained. The resulting product is then inoculated with white rot fungus solution and fermented in a ventilated environment for 16-20 days, turning the pile every 2 days to complete the pretreatment of straw, coconut shells, and peanut shells.

8. The bio-organic fertilizer according to claim 7, characterized in that, The sodium hydroxide solution has a mass concentration of 1-3%, and the mass of the sodium hydroxide solution is 2-4% of the mass of the straw.

9. The bio-organic fertilizer according to claim 1, characterized in that, The compound microbial agent is prepared by the following method: Rhizobium, Bacillus amyloliquefaciens, and Bacillus subtilis are placed in a fermentation medium and cultured at a temperature of 30-32℃, a humidity of 70-80%, and a pH of 7-7.2 for 4-6 days to obtain the compound microbial agent, wherein the mass ratio of Rhizobium, Bacillus amyloliquefaciens, and Bacillus subtilis is 1:(4-6):(1-3).

10. A method for preparing bio-organic fertilizer according to claims 1-9, characterized in that, The process includes the following steps: Weigh the base material, auxiliary materials, powder, and paste as needed and add them to a mixer. Set the mixer to 200-300 rpm and stir for 20-30 minutes. After stirring, add water (50-60% of the product mass) to the mixer and stir for 10-20 minutes at 300-400 rpm. Then add the compound microbial agent and stir for 4-6 minutes at 80-100 rpm to obtain a mixture. Spread the mixture flat outdoors to dry. After drying, pile it up for fermentation. The fermentation time is 23-25 ​​days. On the 3rd to 5th day of fermentation, turn the pile every 3-5 days to obtain bio-organic fertilizer.

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