CN103641638B - Sustained-release composite microbial fertilizer and preparation method thereof - Google Patents
Sustained-release composite microbial fertilizer and preparation method thereof Download PDFInfo
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Abstract
The invention provides a sustained-release composite microbial fertilizer and a preparation method thereof. The fertilizer comprises a fertilizer core and an envelope wrapping the fertilizer core, wherein the fertilizer core contains polyacrylamide, epsilon-polylysine, ascorbic acid, EDTA (ethylene diamine tetraacetic acid), a composite microbial agent and the balance being organic filler. The fertilizer is stable and efficient, and can be easily absorbed and utilized by crops, and damage and pollution to soil can be effectively avoided.
Description
Technical field
The present invention relates to agricultural fertilizer technical field, particularly relate to a kind of Sustained-release composite microbial fertilizer and preparation method thereof.
Background technology
Slow release fertilizer is also known as slow-release fertilizer, and be the class fertilizer new variety that development in recent years is got up, this kind of fertilizer, can replace the partial function of organic fertilizer, reduces the loss of nutrient in fertilizer, improves fertilizer efficiency, weakens the pollution of fertilizer to soil.
Slow release fertilizer mainly comprises coated fertilizer and low solubility fertilizer.Coated fertilizer is function in order to improve fertilizer or performance, and be coated with one deck at its particle surface and have the fertilizer that microporous hydrophobic indissoluble film makes, utilize coating pore size, chemistry or biological decomposition control nutrient releasing speed.Although capsule structure plays certain slow releasing function to the main nutrient of fertile core, significantly reduce total nutrient content, be difficult to apply producing in high-content formula fertilizer in blending mode; Above in listed portion of techniques, containing difficult degradation materials such as resins in coated fertilizer composition, there is potentially contaminated to soil in life-time service.Therefore need the defect for aforesaid method to improve, invent a kind of coated fertilizer ecological safety, consumption is few, film forming good, and slow release effect is obvious, the new technology of application increase yield significantly.
In China, for many years due to the life-time service of chemical fertilizer, fertilizer is not enough, all kinds of nutrients ratio imbalance, cause the destruction that farmland ecological environment, soil physico-chemical property and soil microflora are subject in various degree, have impact on the safety of agricultural-food to a certain extent.Existing chemical fertilizer can break the colony balance in soil micro-ecosystem system usually, can cause the Rampant damage of pathogenic bacteria on the contrary further.
Biological organic fertilizer nutritive element is comprehensive, can improve soil, improves the soil compaction using chemical fertilizer to cause.Improve soil physical and chemical property, strengthen the ability of soil water-retaining, fertilizer conservation, fertilizer.Mutual symbiosis Relationship With Proliferation is formed with Soil Microorganism after beneficial microorganism in biological organic fertilizer enters soil, harmful bacteria is suppressed to grow and be converted into probiotics, interact, mutually promote, play the synergy of colony, probiotics produces a large amount of meta-bolitess in growth and breeding process, impel organic decomposition and inversion, can directly or indirectly for crop provide multiple nutrients and pungent, promoting and regulation and control plant growth, is a kind of environment-friendly type fertilizer.
Biological organic fertilizer is in the market mainly using feces of livestock and poultry and the peat composed of rotten mosses, differentiation coal as organic raw material, single feces of livestock and poultry is because its fermentation maturity is slow, atmospheric pollution heavy, occupied ground is large, time-consuming, be difficult to produce in batches on a large scale, after being applied to soil, if become thoroughly decomposed not exclusively will cause burning seedling.And the peat composed of rotten mosses and differentiation coal execute very difficult in soil dissolving, organic matter wherein and humic acids are difficult to by crop utilization, affect fertilizer efficiency.
Summary of the invention
Object of the present invention is exactly defect for above-mentioned existence and provides a kind of Sustained-release composite microbial fertilizer and preparation method thereof, this fertilizer comprises fertilizer core and is coated on the coating outside fertilizer core, fertilizer core contains polyacrylamide, epsilon-polylysine, xitix, EDTA and complex micro organism fungicide, all the other are organic filler, this fertilizer stability and high efficiency, effectively can avoid the infringement to soil and pollution, be easy to Crop and utilize.
A kind of Sustained-release composite microbial fertilizer of the present invention and preparation method thereof technical scheme is, this fertilizer comprises fertilizer core and is coated on the coating outside fertilizer core, described fertilizer core and the parts by weight of coated fertilizer layer are: fertilizer core 100-150 part, coated fertilizer layer 2-3 part;
The parts by weight of fertilizer core are: polyacrylamide 15-25 part, epsilon-polylysine 5-10 part, xitix 3-5 part, EDTA3-5 part and complex micro organism fungicide 50-150 part, and all the other are organic filler;
Coated fertilizer layer comprises the component of following weight parts: gelatin 2-5 part, polyvinyl alcohol 1-5 part, urea 20-40, ferrous sulfate 5-25 part, zinc sulfate 5-25 part, ammonium citrate 2-5 part, formaldehyde 0.5-1 part, water 30-55 part.
Described complex micro organism fungicide is yeast, azotobacter chroococcum, lichengermium, subtilis, photosynthetic bacteria, bacillus laterosporus, bacillus megaterium, colloid bacillus cereus.
In described complex micro organism fungicide, the content of each bacterial classification is: yeast 10-15 hundred million/g, azotobacter chroococcum 15-20 hundred million/g, lichengermium 15-20 hundred million/g, subtilis 15-20 hundred million/g, photosynthetic bacteria 100-150 hundred million/g, bacillus laterosporus 15-20 hundred million/g, bacillus megaterium 15-20 hundred million/g, colloid bacillus cereus 15-20 hundred million/g.
Described organic filler is amino acid sludge, one or more in humic acids, feces of livestock and poultry, active sludge powder.
The preparation method of this Sustained-release composite microbial fertilizer, step comprises the preparation of fertilizer core, the preparation of coated fertilizer and coating.
The preparation process of fertilizer core is:
(1) obtain the fermented liquid of each bacterial classification after being fermented separately respectively by the bacterial classification in complex micro organism fungicide respectively, then fermentation is carried out in the mixing of the fermented liquid of single culture and obtain mix bacterium agent;
(2) polyacrylamide, epsilon-polylysine, xitix, EDTA are mixed with organic filler, stir;
(3) use disc granulation technology, the mix bacterium agent obtained spraying is bonded to particle, and employing obtains fertilizer core lower than 60-70 DEG C of oven drying at low temperature in step (1).
In step (1), the bacterial classification in complex micro organism fungicide carries out one or more in single culture fermentation employing beef-protein medium, potato culture, LB substratum.
After the bacterial classification in complex micro organism fungicide being fermented separately respectively in step (1), the fermented liquid of single culture is all inoculated into by the inoculum size of 1-2% in the mixture of polyacrylamide, epsilon-polylysine, xitix, EDTA and organic filler, ferment, obtain mix bacterium agent.
The preparation process of coated fertilizer is:
(1) gelatin, polyvinyl alcohol be added to the water mix and blend and be warming up to 60-70 DEG C, then adding part urea as properties-correcting agent and formaldehyde, continuing to stir 20-40 minute;
(2) add ferrous sulfate, zinc sulfate, ammonium citrate successively, add residue urea as solubility promoter, heat to 50-60 DEG C and stir 1-3 hour, obtained coated fertilizer.
Coating step is: in coating machine, by the fertilizer slug particle surface of coated fertilizer atomized spray in motion, then through air seasoning, coating material is solidified and forms coating in urea granules surface, obtain slow release fertilizer.
This fertilizer can be applicable on the greengrocery crop such as the farm crop such as corn, wheat or tomato, cucumber, rape.
Beneficial effect of the present invention is: form mutual symbiosis Relationship With Proliferation with Soil Microorganism after the beneficial microorganism of Sustained-release composite microbial fertilizer of the present invention enters soil, harmful bacteria is suppressed to grow and be converted into probiotics, interact, mutually promote, play the synergy of colony, probiotics produces a large amount of meta-bolitess in growth and breeding process, impel organic decomposition and inversion, can directly or indirectly for crop provides multiple nutrients and pungent, promoting and regulation and control plant growth, is a kind of environment-friendly type fertilizer.The fermentation of mix bacterium agent makes the synergy between various flora strengthen, and can reach very high bacterial classification content, can not lose efficacy easily after fermentation, after being applied to soil, can not causing and burn seedling phenomenon.Other compositions of fertilizer core are environmentally friendly, execute and easily dissolve in soil, and be all easy to by crop utilization, fertilizer efficiency is high.In addition, this fertilizer formula can effectively be kept soil from packing together, and avoids soil property by fertilizer pollution, also effectively can prevent root disease and pest.
The main component of coated fertilizer is the materials such as gelatin, urea, ferrous sulfate, zinc sulfate, is the nutrient that crop can directly or indirectly absorb, without pedo relict, and ecological safety; Polyvinyl alcohol, as film auxiliary agent, makes coated fertilizer better at immersion condition stability inferior.The preparation method of fertilizer of the present invention, further ensures the stability of this fertilizer structure and fertilizer efficiency, and technique is simple, and cost is low, is applicable to large-scale promotion and uses.
embodiment:
In order to understand the present invention better, describe technical scheme of the present invention in detail with specific examples below, but the present invention is not limited thereto.
Embodiment 1
The preparation method of this Sustained-release composite microbial fertilizer, step comprises the preparation of fertilizer core, the preparation of coated fertilizer and coating.
The preparation process of fertilizer core is:
(1) obtain the fermented liquid of each bacterial classification after being fermented separately respectively by the bacterial classification in complex micro organism fungicide respectively, single culture fermentation adopts one or more in beef-protein medium, potato culture, LB substratum; Then by the fermented liquid of single culture by 1% inoculum size be all inoculated into polyacrylamide 20 parts, epsilon-polylysine 8 parts, 4 parts, xitix, EDTA4 part, all the other are in the mixture of organic filler, ferment, and obtain mix bacterium agent.
Described complex micro organism fungicide is yeast, azotobacter chroococcum, lichengermium, subtilis, photosynthetic bacteria, bacillus laterosporus, bacillus megaterium, colloid bacillus cereus.
In described complex micro organism fungicide, the content of each bacterial classification is: yeast 1,500,000,000/g, azotobacter chroococcum 2,000,000,000/g, lichengermium 2,000,000,000/g, subtilis 2,000,000,000/g, photosynthetic bacteria 15,000,000,000/g, bacillus laterosporus 2,000,000,000/g, bacillus megaterium 2,000,000,000/g, colloid bacillus cereus 2,000,000,000/g.
(2) by polyacrylamide, epsilon-polylysine, xitix, EDTA part and organic filler mixing, stir;
(3) disc granulation technology is used, the mix bacterium agent obtained in step (1) spraying is bonded to particle, and employing obtains fertilizer core lower than 65 DEG C of oven drying at low temperatures, in fertilizer core, the weight part of each component is: polyacrylamide 20 parts, epsilon-polylysine 8 parts, 4 parts, xitix, EDTA4 part and complex micro organism fungicide 100 parts, all the other are organic filler.Described organic filler is for being amino acid sludge and active sludge powder.
Coated fertilizer layer comprises the component of following weight parts: 3 parts, gelatin, polyvinyl alcohol 3 parts, urea 30,15 parts, ferrous sulfate, 15 parts, zinc sulfate, ammonium citrate 3 parts, 0.8 part, formaldehyde, 40 parts, water; Preparation process is:
(1) gelatin, polyvinyl alcohol be added to the water mix and blend and be warming up to 65 DEG C, then adding part urea as properties-correcting agent and formaldehyde, continuing stirring 30 minutes;
(2) add ferrous sulfate, zinc sulfate, ammonium citrate successively, add residue urea as solubility promoter, heat to 55 DEG C and stir 2 hours, obtained coated fertilizer.
Coating step is: in coating machine, by the fertilizer slug particle surface of coated fertilizer atomized spray in motion, again through air seasoning, coating material is solidified and forms coating in urea granules surface, obtain slow release fertilizer A, the parts by weight of fertilizer core and coated fertilizer layer are: 120 parts, fertilizer core, 2.5 parts, coated fertilizer layer.
This fertilizer can be applicable on the greengrocery crop such as the farm crop such as corn, wheat or tomato, cucumber, rape.
Embodiment 2
The preparation method of this Sustained-release composite microbial fertilizer, step comprises the preparation of fertilizer core, the preparation of coated fertilizer and coating.
The preparation process of fertilizer core is:
(1) obtain the fermented liquid of each bacterial classification after being fermented separately respectively by the bacterial classification in complex micro organism fungicide respectively, single culture fermentation adopts one or more in beef-protein medium, potato culture, LB substratum; Then by the fermented liquid of single culture by 2% inoculum size be all inoculated in the mixture of polyacrylamide 15 parts, epsilon-polylysine 5 parts, 3 parts, xitix, EDTA3 part and organic filler, ferment, obtain mix bacterium agent.
Described complex micro organism fungicide is yeast, azotobacter chroococcum, lichengermium, subtilis, photosynthetic bacteria, bacillus laterosporus, bacillus megaterium, colloid bacillus cereus.
In described complex micro organism fungicide, the content of each bacterial classification is: yeast 1,200,000,000/g, azotobacter chroococcum 1,800,000,000/g, lichengermium 1,800,000,000/g, subtilis 1,800,000,000/g, photosynthetic bacteria 10,000,000,000/g, bacillus laterosporus 1,800,000,000/g, bacillus megaterium 1,800,000,000/g, colloid bacillus cereus 1,800,000,000/g.
(2) by polyacrylamide, epsilon-polylysine, xitix, EDTA part and organic filler mixing, stir;
(3) disc granulation technology is used, the mix bacterium agent obtained in step (1) spraying is bonded to particle, and employing obtains fertilizer core lower than 60 DEG C of oven drying at low temperatures, in fertilizer core, the weight part of each component is: polyacrylamide 15 parts, epsilon-polylysine 5 parts, 3 parts, xitix, EDTA3 part and complex micro organism fungicide 50 parts, all the other are organic filler.Described organic filler is for being feces of livestock and poultry.
Coated fertilizer layer comprises the component of following weight parts: 2 parts, gelatin, polyvinyl alcohol 1 part, urea 20,5 parts, ferrous sulfate, 5 parts, zinc sulfate, ammonium citrate 2 parts, 0.5 part, formaldehyde, 305 parts, water; Preparation process is:
(1) gelatin, polyvinyl alcohol be added to the water mix and blend and be warming up to 60 DEG C, then adding part urea as properties-correcting agent and formaldehyde, continuing stirring 20 minutes;
(2) add ferrous sulfate, zinc sulfate, ammonium citrate successively, add residue urea as solubility promoter, heat to 50 DEG C and stir 1 hour, obtained coated fertilizer.
Coating step is: in coating machine, by the fertilizer slug particle surface of coated fertilizer atomized spray in motion, again through air seasoning, coating material is solidified and forms coating in urea granules surface, obtain slow release fertilizer B, the parts by weight of fertilizer core and coated fertilizer layer are: 100 parts, fertilizer core, 2 parts, coated fertilizer layer.
This fertilizer can be applicable on the greengrocery crop such as the farm crop such as corn, wheat or tomato, cucumber, rape.
Embodiment 3
The preparation method of this Sustained-release composite microbial fertilizer, step comprises the preparation of fertilizer core, the preparation of coated fertilizer and coating.
The preparation process of fertilizer core is:
(1) obtain the fermented liquid of each bacterial classification after being fermented separately respectively by the bacterial classification in complex micro organism fungicide respectively, single culture fermentation adopts one or more in beef-protein medium, potato culture, LB substratum; Then by the fermented liquid of single culture by 1.5% inoculum size be all inoculated in the mixture of polyacrylamide 25 parts, epsilon-polylysine 10 parts, 5 parts, xitix, EDTA5 part and organic filler, ferment, obtain mix bacterium agent.
Described complex micro organism fungicide is yeast, azotobacter chroococcum, lichengermium, subtilis, photosynthetic bacteria, bacillus laterosporus, bacillus megaterium, colloid bacillus cereus.
In described complex micro organism fungicide, the content of each bacterial classification is: yeast 1,000,000,000/g, azotobacter chroococcum 1,500,000,000/g, lichengermium 1,500,000,000/g, subtilis 1,500,000,000/g, photosynthetic bacteria 13,000,000,000/g, bacillus laterosporus 1,500,000,000/g, bacillus megaterium 1,500,000,000/g, colloid bacillus cereus 1,500,000,000/g.
(2) by polyacrylamide, epsilon-polylysine, xitix, EDTA part and organic filler mixing, stir;
(3) disc granulation technology is used, the mix bacterium agent obtained in step (1) spraying is bonded to particle, and employing obtains fertilizer core lower than 70 DEG C of oven drying at low temperatures, in fertilizer core, the weight part of each component is: polyacrylamide 25 parts, epsilon-polylysine 10 parts, 5 parts, xitix, EDTA5 part and complex micro organism fungicide 150 parts, all the other are organic filler.Described organic filler is for being humic acids.
Coated fertilizer layer comprises the component of following weight parts: 5 parts, gelatin, polyvinyl alcohol 5 parts, urea 40,25 parts, ferrous sulfate, 25 parts, zinc sulfate, ammonium citrate 5 parts, 1 part, formaldehyde, 55 parts, water; Preparation process is:
(1) gelatin, polyvinyl alcohol be added to the water mix and blend and be warming up to 70 DEG C, then adding part urea as properties-correcting agent and formaldehyde, continuing stirring 40 minutes;
(2) add ferrous sulfate, zinc sulfate, ammonium citrate successively, add residue urea as solubility promoter, heat to 60 DEG C and stir 3 hours, obtained coated fertilizer.
Coating step is: in coating machine, by the fertilizer slug particle surface of coated fertilizer atomized spray in motion, again through air seasoning, coating material is solidified and forms coating in urea granules surface, obtain slow release fertilizer C, the parts by weight of fertilizer core and coated fertilizer layer are: 150 parts, fertilizer core, 3 parts, coated fertilizer layer.
This fertilizer can be applicable on the greengrocery crop such as the farm crop such as corn, wheat or tomato, cucumber, rape.
Embodiment 4
The preparation method of this Sustained-release composite microbial fertilizer, step comprises the preparation of fertilizer core, the preparation of coated fertilizer and coating.
The preparation process of fertilizer core is:
(1) obtain the fermented liquid of each bacterial classification after being fermented separately respectively by the bacterial classification in complex micro organism fungicide respectively, single culture fermentation adopts one or more in beef-protein medium, potato culture, LB substratum; Then by the fermented liquid of single culture by 1% inoculum size be all inoculated in the mixture of polyacrylamide 25 parts, epsilon-polylysine 5 parts, 5 parts, xitix, EDTA3 part and organic filler, ferment, obtain mix bacterium agent.
Described complex micro organism fungicide is yeast, azotobacter chroococcum, lichengermium, subtilis, photosynthetic bacteria, bacillus laterosporus, bacillus megaterium, colloid bacillus cereus.
In described complex micro organism fungicide, the content of each bacterial classification is: yeast 1,500,000,000/g, azotobacter chroococcum 1,800,000,000/g, lichengermium 2,000,000,000/g, subtilis 1,600,000,000/g, photosynthetic bacteria 15,000,000,000/g, bacillus laterosporus 1,800,000,000/g, bacillus megaterium 2,000,000,000/g, colloid bacillus cereus 100,000,000/g.
(2) by polyacrylamide, epsilon-polylysine, xitix, EDTA part and organic filler mixing, stir;
(3) disc granulation technology is used, the mix bacterium agent obtained in step (1) spraying is bonded to particle, and employing obtains fertilizer core lower than 65 DEG C of oven drying at low temperatures, in fertilizer core, the weight part of each component is: polyacrylamide 25 parts, epsilon-polylysine 5 parts, 5 parts, xitix, EDTA3 part and complex micro organism fungicide 120 parts, all the other are organic filler.Described organic filler is amino acid sludge, the mixture of humic acids, feces of livestock and poultry, active sludge powder.
Coated fertilizer layer comprises the component of following weight parts: 4 parts, gelatin, polyvinyl alcohol 5 parts, urea 25,10 parts, ferrous sulfate, 15 parts, zinc sulfate, ammonium citrate 3 parts, 1 part, formaldehyde, 45 parts, water; Preparation process is:
(1) gelatin, polyvinyl alcohol be added to the water mix and blend and be warming up to 65 DEG C, then adding part urea as properties-correcting agent and formaldehyde, continuing stirring 30 minutes;
(2) add ferrous sulfate, zinc sulfate, ammonium citrate successively, add residue urea as solubility promoter, heat to 50 DEG C and stir 2 hours, obtained coated fertilizer.
Coating step is: in coating machine, by the fertilizer slug particle surface of coated fertilizer atomized spray in motion, again through air seasoning, coating material is solidified and forms coating in urea granules surface, obtain slow release fertilizer D, the parts by weight of fertilizer core and coated fertilizer layer are: 150 parts, fertilizer core, 2 parts, coated fertilizer layer.
This fertilizer can be applicable on the greengrocery crop such as the farm crop such as corn, wheat or tomato, cucumber, rape.
Embodiment 5
Test objective
Test objective compares A, B, C, D fertilizer in embodiment of the present invention 1-4 and general chemistry fertilizer to the impact of corn growth, effect of increasing production.
Testing program
Process 1, contrast, does not apply fertilizer;
Process 2, blending chemical fertilizer is bought in common market;
Process 3, fertilizer A, B, C, D of the present invention.
Result
Table 1
。
Embodiment 6
Test objective
Test objective compares A, B, C, D fertilizer in embodiment of the present invention 1-4 and general chemistry fertilizer to the impact of wheat growth, effect of increasing production.
Testing program
Process 1, contrast, does not apply fertilizer;
Process 2, blending chemical fertilizer is bought in common market;
Process 3, fertilizer A, B, C, D of the present invention.
Result
Do very well than process 1 and process 2 in winter resistance, drought resistance and maturation fall Huang in the process 3 of the survey showed that each breeding time fertilizer of the present invention.
Table 2
。
Mutual symbiosis Relationship With Proliferation is formed with Soil Microorganism after the beneficial microorganism of Sustained-release composite microbial fertilizer of the present invention enters soil, harmful bacteria is suppressed to grow and be converted into probiotics, interact, mutually promote, play the synergy of colony, probiotics produces a large amount of meta-bolitess in growth and breeding process, impel organic decomposition and inversion, can directly or indirectly for crop provide multiple nutrients and pungent, promoting and regulation and control plant growth, is a kind of environment-friendly type fertilizer.The fermentation of mix bacterium agent makes the synergy between various flora strengthen, and can reach very high bacterial classification content, can not lose efficacy easily after fermentation, after being applied to soil, can not causing and burn seedling phenomenon.Other compositions of fertilizer core are environmentally friendly, execute and easily dissolve in soil, and be all easy to by crop utilization, fertilizer efficiency is high.In addition, this fertilizer formula can effectively be kept soil from packing together, and avoids soil property by fertilizer pollution, also effectively can prevent root disease and pest.
The main component of coated fertilizer is the materials such as gelatin, urea, ferrous sulfate, zinc sulfate, is the nutrient that crop can directly or indirectly absorb, without pedo relict, and ecological safety; Polyvinyl alcohol, as film auxiliary agent, makes coated fertilizer better at immersion condition stability inferior.The preparation method of fertilizer of the present invention, further ensures the stability of this fertilizer structure and fertilizer efficiency, and technique is simple, and cost is low, is applicable to large-scale promotion and uses.
Claims (1)
1. a Sustained-release composite microbial fertilizer, comprise fertilizer core and be coated on the coating outside fertilizer core, it is characterized in that, described fertilizer core and the parts by weight of coated fertilizer layer are: fertilizer core 100-150 part, coated fertilizer layer 2-3 part;
The parts by weight of fertilizer core are: polyacrylamide 15-25 part, epsilon-polylysine 5-10 part, xitix 3-5 part, EDTA3-5 part and complex micro organism fungicide 50-150 part, and all the other are organic filler;
Coated fertilizer layer comprises the component of following weight parts: gelatin 2-5 part, polyvinyl alcohol 1-5 part, urea 20-40, ferrous sulfate 5-25 part, zinc sulfate 5-25 part, ammonium citrate 2-5 part, formaldehyde 0.5-1 part, water 30-55 part;
In described complex micro organism fungicide, the content of each bacterial classification is: yeast 10-15 hundred million/g, azotobacter chroococcum 15-20 hundred million/g, lichengermium 15-20 hundred million/g, subtilis 15-20 hundred million/g, photosynthetic bacteria 100-150 hundred million/g, bacillus laterosporus 15-20 hundred million/g, bacillus megaterium 15-20 hundred million/g, colloid bacillus cereus 15-20 hundred million/g;
Described organic filler is amino acid sludge, one or more in humic acids, feces of livestock and poultry, active sludge powder;
The preparation method of described a kind of Sustained-release composite microbial fertilizer, step comprises the preparation of fertilizer core, the preparation of coated fertilizer and coating;
The preparation process of fertilizer core is:
(1) obtain the fermented liquid of each bacterial classification after being fermented separately respectively by the bacterial classification in complex micro organism fungicide respectively, then fermentation is carried out in the mixing of the fermented liquid of single culture and obtain mix bacterium agent;
(2) polyacrylamide, epsilon-polylysine, xitix, EDTA are mixed with organic filler, stir;
(3) use disc granulation technology, the mix bacterium agent obtained spraying is bonded to particle, and employing obtains fertilizer core lower than 60-70 DEG C of oven drying at low temperature in step (1);
In step (1), the bacterial classification in complex micro organism fungicide carries out one or more in single culture fermentation employing beef-protein medium, potato culture, LB substratum;
After the bacterial classification in complex micro organism fungicide being fermented separately respectively in step (1), the fermented liquid of single culture is all inoculated into by the inoculum size of 1-2% in the mixture of polyacrylamide, epsilon-polylysine, xitix, EDTA and organic filler, ferment, obtain mix bacterium agent;
The preparation process of coated fertilizer is:
(1) gelatin, polyvinyl alcohol be added to the water mix and blend and be warming up to 60-70 DEG C, then adding part urea as properties-correcting agent and formaldehyde, continuing to stir 20-40 minute;
(2) add ferrous sulfate, zinc sulfate, ammonium citrate successively, add residue urea as solubility promoter, heat to 50-60 DEG C and stir 1-3 hour, obtained coated fertilizer;
Coating step is: in coating machine, by the fertilizer slug particle surface of coated fertilizer atomized spray in motion, then through air seasoning, coating material is solidified and forms coating in urea granules surface, obtain slow release fertilizer.
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