CN116986943A - Green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist and preparation method thereof - Google Patents

Green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist and preparation method thereof Download PDF

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CN116986943A
CN116986943A CN202310729795.9A CN202310729795A CN116986943A CN 116986943 A CN116986943 A CN 116986943A CN 202310729795 A CN202310729795 A CN 202310729795A CN 116986943 A CN116986943 A CN 116986943A
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soybean straw
multipolymer
biochar
phosphate fertilizer
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巩俊花
山东廷
张凯
申智凯
高俊岭
朱红梅
韩冰
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Shikefeng Chemical Industry Co ltd
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Abstract

The invention discloses a green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist and a preparation method thereof, belonging to the technical field of microbial fermentation. The phosphate fertilizer synergist is prepared from glutamic acid, fulvic acid, castor oil, soybean straw, chicken manure, microbial agent, catalytic polymerizer, bentonite and compound sodium nitrophenolate. Uniformly mixing and co-pyrolyzing a soybean straw biochar precursor, bentonite, fulvic acid and glutamic acid under the catalysis and polymerization of ammonium persulfate and the plasticizing action of castor oil, grafting bentonite, fulvic acid and glutamic acid onto biochar to form a soybean straw biochar-bentonite-fulvic acid-glutamic acid large-skeleton multipolymer, and co-inoculating bacillus licheniformis, burkholderia and the biochar multipolymer in a mass ratio of 1:1, so that the phosphorus dissolving and metal chelating effects of the biochar multipolymer are enhanced; the compound sodium nitrophenolate is also added, so that the capability of the fertilizer for entering plants is enhanced, and the utilization rate of the phosphate fertilizer is greatly improved.

Description

Green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist and preparation method thereof
Technical Field
The invention belongs to the technical field of microbial fermentation, and particularly relates to a green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist and a preparation method thereof.
Background
The utilization rate of the phosphate fertilizer in China is lower, only 10% -25%, phosphorus applied to soil is easy to be converted into adsorption-state phosphorus and mineral-state phosphorus, such as insoluble inorganic phosphorus compounds, and the phosphorus is not easy to be absorbed and utilized by plants. While the phosphorus readily absorbed by the plant is soluble phosphorus, such as water-soluble phosphorus and weakly acidic phosphorus. But soluble phosphorus in acid soil (pH < 5.5), phosphorus element, aluminum ion and iron ion generate water-insoluble phosphate; in alkaline soil (pH is more than 6.5), phosphorus element, calcium ions and magnesium ions generate water-insoluble phosphate, so that the utilization rate of the phosphate fertilizer is reduced, a large amount of application is needed repeatedly, the production cost is increased, and a series of ecological environment problems can be caused.
The method adopts the modes of ecological interception of grass belts, hedges, horizontal ditch cultivation, rotation, plastic film mulching and the like to reduce the loss of soil nutrients, and produces the high-efficiency phosphorus fertilizer synergist characterized by high utilization rate and high environmental safety through an industrial way, thereby reducing the environmental pollution, saving the consumption of phosphorus fertilizer, bringing positive social and economic benefits for the effective rapid growth of crops, increasing the yield and income, and having great significance for promoting the development of fertilizer industry and pollution-free agriculture in China. How to try to reduce the fixation of phosphorus and increase the contact area of phosphorus and root system and improve the utilization rate of phosphate fertilizer is an urgent problem to be solved.
Disclosure of Invention
The invention overcomes the defects of the prior art, and discloses a soybean straw biochar multipolymer coated sustained and controlled release phosphate fertilizer and a preparation method thereof, wherein a soybean straw biochar precursor, bentonite, fulvic acid and glutamic acid are uniformly mixed and co-pyrolyzed under the catalysis and polymerization of ammonium persulfate and the plasticizing action of castor oil, bentonite, fulvic acid and glutamic acid are grafted onto the biochar to form a soybean straw biochar-bentonite-fulvic acid-glutamic acid big-framework multipolymer, and bacillus licheniformis, burkholderia and the biochar multipolymer with the mass ratio of 1:1 are co-inoculated, so that the phosphorus dissolving and metal chelating effects of the biochar multipolymer are enhanced; the compound sodium nitrophenolate is also added, so that the penetration, adhesion and adhesive force of the fertilizer are increased, the limit of the plant is broken, the capability of the fertilizer entering the plant is enhanced, the fixation of phosphorus is reduced, the contact area of the phosphorus and the root system is increased, and the utilization rate of the phosphate fertilizer is improved.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist is prepared from the following raw materials in parts by weight: 20-30 parts of glutamic acid, 10-15 parts of fulvic acid, 1-3 parts of castor oil, 60-80 parts of soybean straw, 30-50 parts of chicken manure, 3-5 parts of microbial agent, 1-4 parts of catalytic polymerizer, 3-10 parts of bentonite and 8-10 parts of compound sodium nitrophenolate.
Preferably, the microbial agent is bacillus licheniformis and burkholderia at a mass ratio of 1:1.
More preferably, the bacillus licheniformis is purchased from the China General Microbiological Collection Center (CGMCC), the address is the No. 1, no. 3, the preservation number is CGMCC1.10314, the preservation number is 11 months and 5 days in 2009, the bacillus licheniformis is purchased from the China General Microbiological Collection Center (CGMCC), the address is the No. 1, no. 3, the preservation number is CGMCC1.11013, the preservation number is 2011, no. 9 months and 27 days.
Preferably, the phosphate fertilizer is one or more than two of diammonium phosphate, monoammonium phosphate, calcium superphosphate and triple superphosphate.
Preferably, the catalytic polymerizer is ammonium persulfate.
The preparation method of the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist comprises the following steps:
(1) Preparation of microbial agent
Bacillus licheniformis and Burkholderia are respectively cultured in seed culture media at 30 ℃ and 28 ℃ for 24 hours, then inoculated into LB culture media according to 10% of inoculum size, respectively cultured under the temperature conditions of 30 ℃ and 28 ℃ in an oscillating way until the bacterial concentration OD600 apprxeq 2.5, and then the mass ratio is 1:1, uniformly mixing, and freeze-drying to obtain freeze-dried powder to obtain a microbial agent;
(2) Preparation of soybean straw biochar multipolymer
Preparing raw materials in parts by mass, naturally air-drying the air-dried soybean straw until the water content is less than or equal to 3%, crushing the soybean straw into small sections of 2-3cm, uniformly mixing the small sections with glutamic acid, fulvic acid, bentonite, castor oil and a catalytic polymerizer, adding the small sections into a pyrolysis furnace, introducing nitrogen to empty the air of the pyrolysis furnace, setting the temperature of the pyrolysis furnace to 400 ℃, heating the furnace at 20 ℃/min, continuously introducing nitrogen in the heating process, controlling the flow rate of the nitrogen to 3L/h, maintaining the temperature at 400 ℃ for 30min after reaching 400 ℃, stopping heating, stopping introducing nitrogen when the temperature is naturally cooled to 100 ℃, and cooling to 25 ℃ to obtain the soybean straw biochar multipolymer;
(3) Preparation of soybean straw biochar polymer fine powder containing microbial agent
Adding the soybean straw biochar multipolymer prepared in the step (2) into a reaction container, sequentially adding distilled water and chicken manure with the volume of 2-3 times, uniformly stirring the microbial agent prepared in the step (1), standing and culturing for 48 hours at the temperature of 28-30 ℃, adding compound sodium nitrophenolate, stirring for 20-25min, and ventilating and drying to the water content
Less than or equal to 3 percent, crushing and sieving the soybean straw biochar multi-polymer fine powder containing microbial agents through a 200-mesh sieve;
(4) Granulating
Adding the soybean straw biochar multipolymer fine powder containing the microbial agent prepared in the step (3) into a dry rolling granulator for granulation, and screening out particles with the particle size of 1-4.75mm to obtain the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist.
The soybean straw biochar material contains rich carboxyl, phenolic hydroxyl, aliphatic double bonds, aromatic structures and excellent pore structures; the bentonite is rich in silica and alumina active groups, large in specific surface area, stable in physicochemical property, large in cation exchange capacity and easy to modify; fulvic acid contains a large number of active groups including carboxyl, hydroxyl and some P, O, N, S-containing groups, and has stronger complexing, chelating and surface adsorption capacities; glutamic acid contains a large number of amino and carboxyl active groups. The soybean straw biochar precursor, bentonite, fulvic acid and glutamic acid are uniformly mixed and co-pyrolyzed under the catalysis polymerization of ammonium persulfate and the plasticizing action of castor oil, methyl-CH, silica, alumina active groups, carboxyl or carbonyl C=O, hydroxyl-OH and the like of bentonite, fulvic acid and glutamic acid are grafted onto biochar to form soybean straw biochar-bentonite-fulvic acid-glutamic acid large-skeleton multipolymer, the interlayer distance of the biochar is increased, the average pore diameter of a compound is increased, the structure is more fluffy, the biochar multipolymer with high specific surface area has strong adsorption capacity to phosphorus in soil, the biochar chelated with bentonite forms a porous structure, the specific surface area and the adsorption performance to phosphorus are improved, when the phosphorus in the soil is too high, the biochar multipolymer with low nutrient content can reduce leaching of phosphate into the soil, and when the biochar multipolymer adsorbs too much phosphorus in the soil, the biologically effective phosphorus content in the soil is reduced, so that the effect on the circulation of the microorganism-mediated phosphorus is generated. The biochar multipolymer can also promote the colonization of mycorrhizal fungi on plant root systems, so that the absorption of plants to phosphorus is promoted, the number of phosphorus-dissolving microorganisms can be increased by adding the biochar multipolymer into soil, and moisture can be stored on the large surface of the biochar multipolymer; the fulvic acid chelated by the biochar has rich active groups and stronger complexing, chelating and surface adsorption capabilities, so that the moving distance of phosphorus in soil can be increased, the fixation of water-soluble phosphorus by the soil is inhibited, ineffective phosphorus is converted into effective phosphorus, and the absorption of phosphorus by a root system is promoted; the carbon-chelate glutamic acid has strong chelating ability to cations, and can combine iron, aluminum and calcium cations such as iron phosphate, aluminum phosphate and calcium phosphate fixed by soil to help release fixed phosphorus, and the phosphorus dissolving and metal chelating effects of the carbon-chelate multipolymer improve the utilization rate of phosphate fertilizer; the added compound increases the absorption of plant available phosphorus; the bacillus licheniformis and the burkholderia with the mass ratio of 1:1 are inoculated together, so that the sodium nitrophenolate is enhanced, the penetration, adhesion and adhesive force of the fertilizer are increased, the limitation of plants is broken, and the capability of the fertilizer entering the plants is enhanced.
Advantageous effects
The green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist is prepared by uniformly mixing and co-pyrolyzing a soybean straw biochar precursor, bentonite, fulvic acid and glutamic acid under the catalysis and polymerization of ammonium persulfate and the plasticizing action of castor oil, grafting bentonite, fulvic acid and glutamic acid onto the biochar to form a soybean straw biochar-bentonite-fulvic acid-glutamic acid big-framework multipolymer, and co-inoculating bacillus licheniformis, burkholderia and the biochar multipolymer in a mass ratio of 1:1, so that the phosphorus dissolving and metal chelating effects of the biochar multipolymer are enhanced; the compound sodium nitrophenolate is also added, so that the penetration, adhesion and adhesive force of the fertilizer are increased, the limit of the plant is broken, and the capability of the fertilizer to enter the plant is enhanced. Compared with the prior art, the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist prepared by the method has the advantages that all the raw materials are synergistic, the adsorption effect on phosphate fertilizer in soil is stronger, when the concentration of phosphorus in the soil is too high, the phosphorus in the soil can be adsorbed, and when the phosphorus in the soil is too low, the phosphorus can be released; the added microbial inoculum greatly improves the phosphorus dissolution and metal chelation effects of the phosphate fertilizer synergist, reduces soil hardening, activates soil and improves soil structure; the soybean straw is taken as a raw material, so that the soybean straw is degradable, environment-friendly and green; the space structure is large, the water retention property is excellent, the community of soil microorganisms is activated, the soil health is promoted, the phosphate fertilizer utilization rate is improved, and the crop yield is increased.
Detailed Description
The technical scheme of the invention is further described below with reference to specific examples:
example 1
The green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist is prepared from the following raw materials in parts by weight: 20 parts of glutamic acid, 10 parts of fulvic acid, 1 part of castor oil, 60 parts of soybean straw, 30 parts of chicken manure, 3 parts of microbial agent, 1 part of catalytic polymerizer, 3 parts of bentonite and 8 parts of compound sodium nitrophenolate.
The microbial agent is bacillus licheniformis and burkholderia in a mass ratio of 1:1.
The bacillus licheniformis is purchased from China General Microbiological Collection Center (CGMCC), the address is North Qinghai Lu No. 1, no. 3 in the Korean region of Beijing, the collection number is CGMCC1.10314 in the year 11 and 5, the Burkholderia is purchased from China General Microbiological Collection Center (CGMCC), the address is North Qinghai Lu No. 1, no. 3 in the Korean region of Beijing, the collection number is CGMCC1.11013 in the year 2011, no. 9 and 27.
The phosphate fertilizer is one or more than two of diammonium phosphate, monoammonium phosphate, superphosphate and triple superphosphate.
The catalytic polymerizer is ammonium persulfate.
The preparation method of the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist comprises the following steps:
(1) Preparation of microbial agent
Bacillus licheniformis and Burkholderia are respectively cultured in seed culture media at 30 ℃ and 28 ℃ for 24 hours, then inoculated into LB culture media according to 10% of inoculum size, respectively cultured under the temperature conditions of 30 ℃ and 28 ℃ in an oscillating way until the bacterial concentration OD600 apprxeq 2.5, and then the mass ratio is 1:1, uniformly mixing, and freeze-drying to obtain freeze-dried powder to obtain a microbial agent;
(2) Preparation of soybean straw biochar multipolymer
Preparing raw materials in parts by mass, naturally airing the air-dried soybean straw until the water content is less than or equal to 3%, crushing the soybean straw into small sections with the length of 2cm, uniformly mixing the small sections with glutamic acid, fulvic acid, bentonite, castor oil and a catalytic polymerizer, adding the small sections into a pyrolysis furnace, introducing nitrogen to empty air of the pyrolysis furnace, setting the temperature of the pyrolysis furnace to 400 ℃, heating the pyrolysis furnace at a speed of 20 ℃/min, continuously introducing nitrogen in the heating process, controlling the flow rate of the nitrogen to 3L/h, maintaining the temperature at 400 ℃ for 30min after reaching 400 ℃, stopping heating, stopping introducing nitrogen when the temperature is naturally cooled to 100 ℃, and cooling to 25 ℃ to obtain the soybean straw biochar multipolymer;
(3) Preparation of soybean straw biochar polymer fine powder containing microbial agent
Adding the soybean straw biochar multipolymer prepared in the step (2) into a reaction container, sequentially adding distilled water and chicken manure with the volume of 2 times, uniformly stirring the microbial agent prepared in the step (1), standing and culturing for 48 hours at the temperature of 28 ℃, adding sodium nitrophenolate, stirring for 20 minutes, ventilating and drying until the water content is less than or equal to 3%,
pulverizing, and sieving with 200 mesh sieve to obtain soybean straw biochar multipolymer fine powder containing microbial agent;
(4) Granulating
Adding the soybean straw biochar multipolymer fine powder containing the microbial agent prepared in the step (3) into a dry rolling granulator for granulation, and screening out particles with the particle size of 1-4.75mm to obtain the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist.
Example 2
The green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist is prepared from the following raw materials in parts by weight: 25 parts of glutamic acid, 12 parts of fulvic acid, 2 parts of castor oil, 70 parts of soybean straw, 40 parts of chicken manure, 4 parts of microbial agent, 2 parts of catalytic polymerizer, 7 parts of bentonite and 9 parts of compound sodium nitrophenolate.
The microbial agent is bacillus licheniformis and burkholderia in a mass ratio of 1:1.
The bacillus licheniformis is purchased from China General Microbiological Collection Center (CGMCC), the address is North Qinghai Lu No. 1, no. 3 in the Korean region of Beijing, the collection number is CGMCC1.10314 in the year 11 and 5, the Burkholderia is purchased from China General Microbiological Collection Center (CGMCC), the address is North Qinghai Lu No. 1, no. 3 in the Korean region of Beijing, the collection number is CGMCC1.11013 in the year 2011, no. 9 and 27.
The phosphate fertilizer is one or more than two of diammonium phosphate, monoammonium phosphate, superphosphate and triple superphosphate.
The catalytic polymerizer is ammonium persulfate.
The preparation method of the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist comprises the following steps:
(1) Preparation of microbial agent
Bacillus licheniformis and Burkholderia are respectively cultured in seed culture media at 30 ℃ and 28 ℃ for 24 hours, then inoculated into LB culture media according to 10% of inoculum size, respectively cultured under the temperature conditions of 30 ℃ and 28 ℃ in an oscillating way until the bacterial concentration OD600 apprxeq 2.5, and then the mass ratio is 1:1, uniformly mixing, and freeze-drying to obtain freeze-dried powder to obtain a microbial agent;
(2) Preparation of soybean straw biochar multipolymer
Preparing raw materials in parts by mass, naturally airing the air-dried soybean straw until the water content is less than or equal to 3%, crushing the soybean straw into small sections with the length of 2cm, uniformly mixing the small sections with glutamic acid, fulvic acid, bentonite, castor oil and a catalytic polymerizer, adding the small sections into a pyrolysis furnace, introducing nitrogen to empty air of the pyrolysis furnace, setting the temperature of the pyrolysis furnace to 400 ℃, heating the pyrolysis furnace at a speed of 20 ℃/min, continuously introducing nitrogen in the heating process, controlling the flow rate of the nitrogen to 3L/h, maintaining the temperature at 400 ℃ for 30min after reaching 400 ℃, stopping heating, stopping introducing nitrogen when the temperature is naturally cooled to 100 ℃, and cooling to 25 ℃ to obtain the soybean straw biochar multipolymer;
(3) Preparation of soybean straw biochar polymer fine powder containing microbial agent
Adding the soybean straw biochar multipolymer prepared in the step (2) into a reaction container, sequentially adding distilled water and chicken manure with 3 times of volume, uniformly stirring the microbial agent prepared in the step (1), standing and culturing for 48 hours at 30 ℃, adding sodium nitrophenolate, stirring for 22min, ventilating and drying until the water content is less than or equal to 3%,
pulverizing, and sieving with 200 mesh sieve to obtain soybean straw biochar multipolymer fine powder containing microbial agent;
(4) Granulating
Adding the soybean straw biochar multipolymer fine powder containing the microbial agent prepared in the step (3) into a dry rolling granulator for granulation, and screening out particles with the particle size of 1-4.75mm to obtain the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist.
Example 3
The green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist is prepared from the following raw materials in parts by weight: 30 parts of glutamic acid, 15 parts of fulvic acid, 3 parts of castor oil, 80 parts of soybean straw, 50 parts of chicken manure, 5 parts of microbial agent, 4 parts of catalytic polymerizer, 10 parts of bentonite and 10 parts of compound sodium nitrophenolate.
The microbial agent is bacillus licheniformis and burkholderia in a mass ratio of 1:1.
The bacillus licheniformis is purchased from China General Microbiological Collection Center (CGMCC), the address is North Qinghai Lu No. 1, no. 3 in the Korean region of Beijing, the collection number is CGMCC1.10314 in the year 11 and 5, the Burkholderia is purchased from China General Microbiological Collection Center (CGMCC), the address is North Qinghai Lu No. 1, no. 3 in the Korean region of Beijing, the collection number is CGMCC1.11013 in the year 2011, no. 9 and 27.
The phosphate fertilizer is one or more than two of diammonium phosphate, monoammonium phosphate, superphosphate and triple superphosphate.
The catalytic polymerizer is ammonium persulfate.
The preparation method of the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist comprises the following steps:
(1) Preparation of microbial agent
Bacillus licheniformis and Burkholderia are respectively cultured in seed culture media at 30 ℃ and 28 ℃ for 24 hours, then inoculated into LB culture media according to 10% of inoculum size, respectively cultured under the temperature conditions of 30 ℃ and 28 ℃ in an oscillating way until the bacterial concentration OD600 apprxeq 2.5, and then the mass ratio is 1:1, uniformly mixing, and freeze-drying to obtain freeze-dried powder to obtain a microbial agent;
(2) Preparation of soybean straw biochar multipolymer
Preparing raw materials in parts by mass, naturally airing the air-dried soybean straw until the water content is less than or equal to 3%, crushing the soybean straw into small sections with the water content of 3cm, uniformly mixing the small sections with glutamic acid, fulvic acid, bentonite, castor oil and a catalytic polymerizer, adding the small sections into a pyrolysis furnace, introducing nitrogen to empty the air of the pyrolysis furnace, setting the temperature of the pyrolysis furnace to 400 ℃, heating the pyrolysis furnace at a speed of 20 ℃/min, continuously introducing nitrogen in the heating process, controlling the flow rate of the nitrogen to 3L/h, maintaining the temperature at 400 ℃ for 30min after reaching 400 ℃, stopping heating, stopping introducing nitrogen when the temperature is naturally cooled down to 100 ℃, and cooling to 25 ℃ to obtain the soybean straw biochar multipolymer;
(3) Preparation of soybean straw biochar polymer fine powder containing microbial agent
Adding the soybean straw biochar multipolymer prepared in the step (2) into a reaction container, sequentially adding distilled water and chicken manure with 3 times of volume, uniformly stirring the microbial agent prepared in the step (1), standing and culturing for 48 hours at 30 ℃, adding sodium nitrophenolate, stirring for 25 minutes, ventilating and drying until the water content is less than or equal to 3%,
pulverizing, and sieving with 200 mesh sieve to obtain soybean straw biochar multipolymer fine powder containing microbial agent;
(4) Granulating
Adding the soybean straw biochar multipolymer fine powder containing the microbial agent prepared in the step (3) into a dry rolling granulator for granulation, and screening out particles with the particle size of 1-4.75mm to obtain the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist.
Comparative examples 1 to 4
The composition and the proportion of the microbial agent are changed to prepare the antibacterial sustained and controlled release fertilizer, and other raw materials and preparation methods are the same as those of the example 1. Namely, in the preparation method of the microbial agent: bacillus licheniformis and Burkholderia are respectively cultured in seed culture media at 30 ℃ and 28 ℃ for 24 hours, respectively inoculated with LB culture media according to 10 percent of inoculum size at 30 ℃ and 28 ℃, then are subjected to shaking culture until the bacterial concentration OD600 is approximately equal to 2.5, and then are mixed according to different mass ratios to obtain corresponding proportions.
The microbial agent composition is shown in table 1:
table 1 microbial inoculant composition (mass ratio)
Detection experiment:
taking soil in the same environment, adopting the same daily corn planting field management mode, wherein corn is 0.15m in 2021, 5 and 7 days 2 Corn (test corn: chongqing Jin Dechong Co., ltd. -golden glutinous No. 1) is planted in the left and right sized pots, 1 plant is planted in each pot, the phosphate fertilizer synergists prepared in examples 1-3 and comparative examples 1-4 are respectively stirred and mixed uniformly with monoammonium phosphate (Shandong Wanyang Biotechnology Co., ltd., N-P-K:12-61-0, total nutrient 73%) according to 1.2 Kg/ton, 5g of mixed fertilizer is applied to each pot of corn, and the blank control is phosphate fertilizer without the synergist. Cutting corn seedlings in the soil in 2021 for 22 days in 6 months, drying, weighing and crushing, and then digesting by using H2SO4-H2O2, and measuring the total phosphorus content by using a vanadium-molybdenum Huang Bise method; after corn seedlings are sheared, soil samples are taken from the soil in the pot according to a quarter method, about 200g of soil samples are taken from each pot, evenly mixed, air-dried and screened by a 20-mesh sieve, and the effective phosphorus content of the soil is measured by utilizing a sodium bicarbonate leaching and molybdenum-antimony colorimetry. The results of the corn seedling dry weight, plant total phosphorus amount and soil available phosphorus content are shown in Table 2:
TABLE 2 corn seedling effective phosphorus content detection Table
By comparing experimental data, corn seedlings planted and cultivated for 45 days are compared with a control group without adding a phosphate fertilizer synergist, the phosphorus fertilizer synergist prepared by the invention improves the effective phosphorus content in soil by 58%, the phosphorus absorption content of plants by 26%, and the dry weight of plants by 24%, thereby effectively promoting the growth of crops.
Field test
The phosphate fertilizer synergists prepared in the embodiments 1-3 and the comparative examples 1-4 and the blank group phosphate fertilizer without the phosphate fertilizer synergist are used for planting corn in the same planting environment land of 16 mu of a Yishui county Xia Weizhen discriminator village village Nanjing Wang family farm, corn seeds are purchased from Daqing Jin Dechong company, 1 st, 2021 th and 5 th are sowed, row spacing is 60cm, plant spacing is 36cm, seedlings emerge in 5 th and 22 th are separated, 16 mu of land is divided into 16 areas with the area of 2 mu, the phosphate fertilizer synergists prepared in the embodiments 1-3 and the comparative examples 1-4 are respectively mixed with ammonium dihydrogen phosphate (Shandong Wan Biotechnology Co., N-P-K:12-61-0, total nutrient 73%) uniformly by stirring, and respectively applying the fertilizer to the 16 mu of land, and each mu of land is 20Kg of ammonium dihydrogen phosphate containing the phosphate fertilizer; the urea 25Kg and the potassium chloride 15Kg are applied to each mu of the nitrogenous fertilizer and the potash fertilizer, the total fertilization is one-time fertilization, the management of the corn growth period is carried out according to the conventional cultivation technology, the thousand grain weight of corn and the mu yield of corn are counted, and the statistical results are shown in the table 2:
through experimental data analysis, the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist and phosphate fertilizer prepared by the invention are applied to the corn planting process, and the average per mu yield of 757Kg is compared with a blank group without the phosphate fertilizer synergist, so that the per mu yield of corn is increased by 235Kg, and the yield is increased by 45%. The green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist can better meet the nutrient requirements in the growth and development process of corn, obviously improve the utilization rate of phosphate fertilizer, promote the growth of corn and increase the yield of corn.
The phosphate fertilizer synergists prepared in the embodiments 1-3 and the comparative examples 1-4 and the blank group phosphate fertilizer without the phosphate fertilizer synergist are used for planting wheat in the same planting environment land of 8 mu of a Yishui county Xia Weizhen discriminator village village Nanjing Wang family farm, wheat seeds are selected from Jimai 22 of Shandong agricultural academy of sciences of agricultural science, 10 days of 2021, the row spacing is 25cm and the plant spacing is 10cm, 8 mu of land is divided into 8 lands with the area size, the phosphate fertilizer synergists prepared in the embodiments 1-3 and the comparative examples 1-4 are respectively and uniformly mixed with ammonium dihydrogen phosphate (Shandong Wanyuyang biotechnology limited company, N-P-K:12-61-0 and total nutrient 73%) according to 1.2 per ton, and the blank group ammonium dihydrogen phosphate without the phosphate synergist is respectively applied to the 8 mu of land, and each Kg of ammonium dihydrogen phosphate with the phosphate synergist is applied to 20Kg of ammonium dihydrogen phosphate; the urea 20Kg and the potassium chloride 8Kg are applied to each mu of the nitrogenous fertilizer and the potash fertilizer, the total fertilization is one-time fertilization, the management of the growth period of the wheat is carried out according to the conventional cultivation technology, the mu yield of the wheat is counted, and the statistical result is shown in the table 3:
table 3 statistical table of wheat growth
Group of Wheat grain number per ear Thousand grain weight/g Mu yield/Kg of wheat
Example 1 42 52.6 589
Example 2 43 51.8 584
Example 3 40 51.4 592
Comparative example 1 37 46.7 524
Comparative example 2 35 48.3 536
Comparative example 3 36 47.2 569
Comparative example 4 36 46.8 528
Blank group 34 43.5 485
Through experimental data analysis, the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist and phosphate fertilizer prepared by the invention are applied to the corn planting process, the average acre yield is 588Kg, and the contrast and yield increase is 103Kg and the yield increase is 21.2 percent compared with a blank group without the phosphate fertilizer synergist. The green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist disclosed by the invention can better meet the nutrient requirements in the growth and development process of wheat, obviously improve the utilization rate of phosphate fertilizer and increase the yield of wheat.
It should be noted that the above-mentioned embodiments are merely some, but not all embodiments of the preferred mode of carrying out the invention. It is evident that all other embodiments obtained by a person skilled in the art without making any inventive effort, based on the above-described embodiments of the invention, shall fall within the scope of protection of the invention.

Claims (6)

1. The green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist is characterized by comprising the following raw materials in parts by weight: 20-30 parts of glutamic acid, 10-15 parts of fulvic acid, 1-3 parts of castor oil, 60-80 parts of soybean straw, 30-50 parts of chicken manure, 3-5 parts of microbial agent, 1-4 parts of catalytic polymerizer, 3-10 parts of bentonite and 8-10 parts of compound sodium nitrophenolate.
2. The green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist according to claim 1, wherein the microbial agent is bacillus licheniformis and burkholderia at a mass ratio of 1:1.
3. The green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist according to claim 2, wherein the bacillus licheniformis has a microorganism preservation number of CGMCC1.10314 and the burkholderia has a microorganism preservation number of CGMCC1.11013.
4. The green high-efficiency soybean straw biochar terpolymer phosphate fertilizer synergist according to claim 1, wherein the phosphate fertilizer is one or more than two of diammonium phosphate, monoammonium phosphate, calcium superphosphate and triple superphosphate.
5. The green and efficient soybean straw biochar multi-polymer phosphate fertilizer synergist according to claim 1, wherein the catalytic polymerization agent is ammonium persulfate.
6. A method for preparing the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist according to any one of claims 1-5, which comprises the following steps:
(1) Preparation of microbial agent
Bacillus licheniformis and Burkholderia are respectively cultured in seed culture media at 30 ℃ and 28 ℃ for 24 hours, then inoculated into LB culture media according to 10% of inoculum size, respectively cultured under the temperature conditions of 30 ℃ and 28 ℃ in an oscillating way until the bacterial concentration OD600 apprxeq 2.5, and then the mass ratio is 1:1, uniformly mixing, and freeze-drying to obtain freeze-dried powder to obtain a microbial agent;
(2) Preparation of soybean straw biochar multipolymer
Preparing raw materials in parts by mass, naturally air-drying the air-dried soybean straw until the water content is less than or equal to 3%, crushing the soybean straw into small sections of 2-3cm, uniformly mixing the small sections with glutamic acid, fulvic acid, bentonite, castor oil and a catalytic polymerizer, adding the small sections into a pyrolysis furnace, introducing nitrogen to empty the air of the pyrolysis furnace, setting the temperature of the pyrolysis furnace to 400 ℃, heating the furnace at 20 ℃/min, continuously introducing nitrogen in the heating process, controlling the flow rate of the nitrogen to 3L/h, maintaining the temperature at 400 ℃ for 30min after reaching 400 ℃, stopping heating, stopping introducing nitrogen when the temperature is naturally cooled to 100 ℃, and cooling to 25 ℃ to obtain the soybean straw biochar multipolymer;
(3) Preparation of soybean straw biochar polymer fine powder containing microbial agent
Adding the soybean straw biochar multipolymer prepared in the step (2) into a reaction container, sequentially adding distilled water and chicken manure which are 2-3 times of the volume, uniformly stirring the microbial agent prepared in the step (1), standing and culturing for 48 hours at 28-30 ℃, adding sodium nitrophenolate, stirring for 20-25min, carrying out ventilation drying until the water content is less than or equal to 3%, crushing and sieving with a 200-mesh sieve to obtain soybean straw biochar multipolymer fine powder containing the microbial agent;
(4) Granulating
Adding the soybean straw biochar multipolymer fine powder containing the microbial agent prepared in the step (3) into a dry rolling granulator for granulation, and screening out particles with the particle size of 1-4.75mm to obtain the green high-efficiency soybean straw biochar multipolymer phosphate fertilizer synergist.
CN202310729795.9A 2023-06-20 2023-06-20 Green high-efficiency soybean straw biochar multi-polymer phosphate fertilizer synergist and preparation method thereof Pending CN116986943A (en)

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