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CN-121990860-A - Microbial compound fertilizer and preparation method thereof

CN121990860ACN 121990860 ACN121990860 ACN 121990860ACN-121990860-A

Abstract

The invention discloses a microbial compound fertilizer and a preparation method thereof, and relates to the technical field of organic fertilizers. The microbial compound fertilizer comprises, by mass, 35-55 parts of an inorganic fertilizer matrix, 30-45 parts of a modified organic carrier, 2-8 parts of a compound microbial agent and 3-6 parts of a medium trace element additive. And 0.5-2 parts of synergistic auxiliary agent, the organic part is easier to be utilized and the carrier is more perfect in water and fertilizer retention and buffering environment through the modified carrier thought of 'plant source organic matter of enzymolysis and fermentation+mineral source potassium fulvate+specific plant growth promoter', so that the problems of slow decomposition, mismatching of fertilizer supply, weak water and fertilizer retention and the like of the traditional carrier are solved.

Inventors

  • LIU ZHENGUO
  • WANG JIJUN

Assignees

  • 德州市晟昊生物科技有限公司

Dates

Publication Date
20260508
Application Date
20260206

Claims (10)

  1. 1. The microbial compound fertilizer is characterized by comprising the following raw materials in parts by mass: 35-55 parts of inorganic fertilizer matrix; 30-45 parts of modified organic carrier; 2-8 parts of a composite microbial agent; 3-6 parts of medium and trace element additives; 0.5-2 parts of synergistic auxiliary agent; the modified organic carrier is a mixture of plant source organic matters, mineral source potassium fulvate and plant growth promoters which are subjected to enzymolysis and fermentation treatment; The plant growth promoter is N- (2- (2- (1H-indol-3-yl) acetamido) ethyl) -2-hydroxybenzoamide.
  2. 2. The microbial compound fertilizer according to claim 1, wherein the compound microbial inoculant consists of bacillus subtilis Bacillus subtilis, paenibacillus mucilaginosus Paenibacillus mucilaginosus and trichoderma harzianum Trichoderma harzianum; Wherein the ratio of the effective viable count of the bacillus subtilis, the paenibacillus mucilaginosus and the trichoderma harzianum is 2-3:1-2:1, and the total effective viable count of the composite microbial agent is more than or equal to 5.0X10 9 CFU/g.
  3. 3. The microbial compound fertilizer according to claim 1, wherein the inorganic fertilizer matrix is formed by mixing urea, monoammonium phosphate and potassium sulfate according to a mass ratio of 1.5-2.0:1:1.2-1.5.
  4. 4. The microbial compound fertilizer according to claim 1, wherein the mass ratio of the plant source organic matters, the mineral source potassium fulvate and the plant growth promoter in the modified organic carrier is 50-70:20-40:0.1-1.0.
  5. 5. The microbial compound fertilizer according to claim 1, wherein the synergistic auxiliary agent is one or a combination of more of polyglutamic acid, chitosan oligosaccharide and polyaspartic acid.
  6. 6. The microbial compound fertilizer according to claim 1, wherein the medium and trace element additive is one or more of EDTA chelated calcium, EDTA chelated magnesium, borax and zinc sulfate heptahydrate.
  7. 7. A method for preparing a microbial compound fertilizer according to any one of claims 1 to 6, comprising the steps of: S1, preparing a modified organic carrier, namely crushing plant source organic matters, adding cellulase and protease for enzymolysis, and then adding mineral source potassium fulvate and a plant growth promoter for uniform mixing to obtain the modified organic carrier; S2, core granulation, namely mixing an inorganic fertilizer matrix, a medium trace element additive and the modified organic carrier prepared in the step S1 in proportion, and performing rotary drum granulation or disc granulation to prepare a compound fertilizer granule core; S3, drying and cooling, namely drying the particle cores prepared in the step S2 by a dryer, and controlling the discharging temperature to be lower than 45 ℃; S4, microbial inoculum coating, namely mixing the composite microbial inoculum and a synergistic auxiliary agent to prepare suspension, and uniformly attaching the suspension on the surface of the cooled particle core in a spraying manner; S5, screening and packaging, namely screening the coated fertilizer to obtain the microbial compound fertilizer.
  8. 8. The method for preparing a microbial compound fertilizer according to claim 7, wherein in the step S1, the temperature of the enzymolysis process is controlled to be 45-55 ℃, the enzymolysis time is 12-24 hours, and the pH value of the material after enzymolysis is adjusted to be 6.5-7.5.
  9. 9. The preparation method of the microbial compound fertilizer according to claim 7, wherein in the step S2, a proper amount of binder solution is sprayed in the granulating process, wherein the binder solution is polyvinyl alcohol solution with the mass concentration of 3% -5% or molasses waste liquid, and the granulating water content is 3% -5%.
  10. 10. The method for preparing a microbial compound fertilizer according to claim 7, wherein in the step S3, the air inlet temperature of the dryer is controlled to be 150-180 ℃, the heating temperature of the materials is controlled to be not more than 70 ℃, and the water content of the dried particles is controlled to be below 3.0%; step S4, the specific operation is that the synergistic auxiliary agent is dissolved in film-forming oil to prepare coating liquid, and the coating liquid is sprayed on the surface of a particle core to form an inner protective layer; The film-forming oil is liquid wax, the dosage is 0.5% -1.0% of the weight of the composite fertilizer granule core, and the fineness of the composite microbial agent is more than or equal to 200 meshes.

Description

Microbial compound fertilizer and preparation method thereof Technical Field The invention relates to the technical field of organic fertilizers, in particular to a microbial compound fertilizer and a preparation method thereof. Background In the modern agricultural process, the microbial compound fertilizer has the quick-acting property of inorganic fertilizer, the soil-modifying property of organic fertilizer and the growth-promoting disease resistance of microbial agent, so that the microbial compound fertilizer becomes a key fertilizer type for solving the soil degradation and improving the crop quality. However, the existing microbial compound fertilizer still has a plurality of technical bottlenecks, and core pain points are concentrated on the defect of the performance of an organic carrier and the defect of the synergistic effect of microorganisms and nutrients. The traditional microbial compound fertilizer mostly adopts an organic carrier (such as straw and livestock manure) which is not modified or simply fermented, the carrier has obvious short plates, firstly macromolecular organic matters are slowly decomposed, nutrient release period is not matched with the fertilizer requirement rule of crops, early fertilizer supply is insufficient, later fertilizer release is easy, secondly the carrier has poor physicochemical property, a single pore structure and weak water and fertilizer retention capacity, a micro environment suitable for survival of microorganisms is difficult to form, the activity of the composite microbial agent is greatly attenuated in the processes of pelleting, drying and soil application, the total effective viable count is easy to be lower than the industry standard, thirdly the carrier lacks targeted modification treatment, enzymolysis is not combined, functional component compounding and other technologies, the carbon-nitrogen ratio is unbalanced, the pH value of soil cannot be effectively regulated, and soil hardening or acidification is easy to be aggravated after long-term use. It is particularly critical that the existing carrier modification technology is still not mature. The partial technology only processes the carrier through simple crushing or conventional fermentation, does not introduce enzymolysis technology to decompose macromolecular substances such as cellulose, protein and the like, and does not compound functional components such as mineral source potassium fulvate, special plant growth promoters and the like, so that the carrier has insufficient protection effect on microorganisms, and the nutrient utilization rate of the fertilizer and the crop promotion effect are difficult to cooperatively promote. In addition, the compatibility of the traditional carrier with inorganic fertilizer matrixes and medium trace element additives is poor, the problems of insufficient particle strength, nutrient loss and the like are easy to occur in the granulating process, and the field application effect of the microbial compound fertilizer is further limited. Therefore, the modified organic carrier with excellent research and development performance optimizes the physicochemical property of the carrier through a scientific modification process, provides stable living matrix for microorganisms, realizes efficient release of nutrients and synergistic promotion of crop growth, becomes a core requirement for breaking through the technical bottleneck of the existing microbial compound fertilizer and improving the comprehensive efficiency of the fertilizer, and has important significance for promoting sustainable development of ecological agriculture. Disclosure of Invention Aiming at the problems of insufficient modification of an organic carrier, easy attenuation of microbial activity, poor synergistic effect of nutrients and the like in the prior art, the invention provides a microbial compound fertilizer which takes a modified organic carrier compounded by enzymolysis of plant source organic matters, mineral source potassium fulvate and specific plant growth promoters as a core and is matched with an inorganic fertilizer matrix, a high-efficiency compound microbial agent and a synergistic auxiliary agent in precise proportion, and the microbial compound fertilizer has balanced nutrient release, stable microbial activity and soil improvement, growth promotion and quality improvement effects and a preparation method thereof. In order to achieve the above purpose, the invention adopts the following technical scheme: the microbial compound fertilizer comprises the following raw materials in parts by mass: 35-55 parts of inorganic fertilizer matrix; 30-45 parts of modified organic carrier; 2-8 parts of a composite microbial agent; 3-6 parts of medium and trace element additives; 0.5-2 parts of synergistic auxiliary agent; the modified organic carrier is a mixture of plant source organic matters, mineral source potassium fulvate and plant growth promoters which are subjected to enzym