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CN-121974752-A - Formula and preparation method of microbial seaweed organic mixed fertilizer

CN121974752ACN 121974752 ACN121974752 ACN 121974752ACN-121974752-A

Abstract

The invention discloses a microbial seaweed organic mixed fertilizer formula and a preparation method thereof, which belong to the technical field of microbial fertilizer manufacture, and comprise, by weight, 30-45 parts of crop waste, 25-35 parts of feces, 10-15 parts of a composite microbial agent, 12-18 parts of modified seaweed powder, 8-12 parts of plant ash, 5-8 parts of seaweed colloid and 0.5-2 parts of modified saponin. According to the invention, seaweed powder is treated by lactic acid solution with specific concentration, so that root system development is promoted to improve nutrient absorption capacity, the cell division and elongation rhythm is regulated, the biostimulation efficiency of the fertilizer to crops is enhanced from a growth basal plane, and healthy growth of the crops is assisted. Through the synergistic application of the maleic anhydride grafted and modified saponin and seaweed colloid, free phosphorus, potassium and other nutrient ions are effectively intercepted, leaching loss in the fermentation preparation and field application processes is reduced, meanwhile, the nutrient supply period is prolonged, stable nutrient support is ensured to be obtained in the whole growth period of crops, and the utilization efficiency of the whole nutrients is improved.

Inventors

  • ZHANG SHIQUAN
  • LI MENGMENG
  • ZHANG XUEQING
  • ZHENG SHUIAN

Assignees

  • 上海思卫特生物科技有限公司

Dates

Publication Date
20260505
Application Date
20260212

Claims (10)

  1. 1. The microbial seaweed organic mixed fertilizer formula is characterized by comprising the following raw materials in parts by weight: 30-45 parts of crop waste, 25-35 parts of excrement, 10-15 parts of composite microbial agent, 12-18 parts of modified seaweed powder, 8-12 parts of plant ash, 5-8 parts of seaweed colloid and 0.5-2 parts of modified saponin; the composite microbial agent consists of azotobacter chroococcus, bacillus subtilis and lactobacillus plantarum, wherein the mass ratio of the azotobacter chroococcus to the bacillus subtilis is 1-1.5:1.5-2:2-2.5.
  2. 2. The microbial seaweed organic mixed fertilizer formula according to claim 1, wherein the preparation method of the modified seaweed powder is that seaweed powder and 8-15% lactic acid solution are mixed according to the mass ratio of 1.5-2.4:4-6, placed in a constant temperature stirring reactor, continuously stirred at the speed of 120-150rpm for 30-40min at the temperature of 65-74 ℃ and then dried, and the modified seaweed powder is obtained.
  3. 3. The microbial seaweed organic mixed fertilizer formula according to claim 1, wherein the preparation method of the modified saponin is characterized in that the saponin is dissolved in methanol to prepare a 10-15wt% saponin solution, the maleic anhydride is dissolved in diethyl ether to prepare a 12-18wt% maleic anhydride solution, the mass ratio of the saponin to the maleic anhydride is 1-1.5:0.05-0.08, the maleic anhydride solution is dropwise added into the saponin solution at the speed of 5-8 drops/min at the temperature of 20-25 ℃, stirring is carried out for 30-40min at the speed of 200-300rpm, the solvent is removed by reduced pressure distillation after stirring is completed, and the modified saponin is obtained after drying.
  4. 4. The microbial seaweed organic mixed fertilizer formula according to claim 1, wherein the seaweed colloid is prepared by mixing seaweed powder and water according to a mass ratio of 1:5-8, stirring for 30-40min at 80-85 ℃, and cooling to 20-25 ℃ to form gel.
  5. 5. A method for preparing a microbial seaweed organic compost formulation as claimed in any of claims 1 to 4, comprising the steps of: S1, mixing 40-50% of crop waste with all feces, regulating the water content by using a citric acid solution, adding 1/4-1/3 of a compound microbial agent, and pre-fermenting to obtain a primary fermentation material; s2, mixing the residual crop waste, modified seaweed powder and plant ash with the primary fermentation material, adding the residual composite microbial agent in an atomization spraying mode, adding seaweed colloid, and carrying out primary fermentation to obtain a fermentation product; s3, mixing the fermentation product obtained in the step S2 with the modified saponin, pre-cooling in a low-temperature environment, feeding the pre-cooled mixture into a granulator to extrude strip materials, crushing and screening the strip materials after liquid nitrogen freezing treatment, and drying the strip materials by a fluidized bed to obtain the microbial seaweed organic mixed fertilizer.
  6. 6. The method for preparing a microbial seaweed organic mixed fertilizer formulation according to claim 5, wherein the pre-fermentation temperature in S1 is 35-40 ℃ and the time is 3-4d.
  7. 7. The method for preparing the microbial seaweed organic mixed fertilizer according to claim 5, wherein the main fermentation temperature in S2 is 42-48 ℃, the time is 5-7d, and the pile turning frequency in the fermentation process is 1 time every 10-12 h.
  8. 8. The method for preparing a microbial seaweed organic mixed fertilizer formula according to claim 5, wherein the mixing mass ratio of the fermentation product to the modified saponin in S3 is 100:1-3; the temperature of the low-temperature environment is-5 to 0 ℃, and the precooling time is 30 to 60 minutes.
  9. 9. The method for preparing a microbial seaweed organic mixed fertilizer formula according to claim 5, wherein the granulator in the step S3 is a double-screw granulator, the rotation speed of a screw is controlled to be 80-120rpm during granulation, and the pressure of compressed air is controlled to be 0.2-0.3MPa; the freezing temperature of the liquid nitrogen is-30 to-20 ℃, and the freezing treatment time of the strip-shaped material in the liquid nitrogen is 10-15s.
  10. 10. The method for preparing a microbial seaweed organic mixed fertilizer formulation according to claim 5, wherein the particle size obtained after crushing and sieving in S3 is 2-4mm, and the fluidized bed drying temperature is 25-30 ℃.

Description

Formula and preparation method of microbial seaweed organic mixed fertilizer Technical Field The invention relates to the technical field of microbial fertilizer manufacturing, in particular to a microbial seaweed organic mixed fertilizer formula and a preparation method thereof. Background With the sustainable development of green agriculture, microbial organic fertilizer has the characteristics of environmental protection, soil structure improvement and crop quality improvement, and becomes a research focus in the field of agricultural production. In the prior art, although a certain progress is made in disease prevention and control and nutrient stability improvement by adding a composite microbial agent (such as bacillus bailii, pseudomonas mongolica and the like), the comprehensive requirements of green agriculture on fertilizer efficiency, economy and ecological friendliness are still difficult to fully meet. At present, after the fertilizer is fermented and prepared and applied in the field, key nutrient ions such as phosphorus, potassium and the like are easy to lose in a free state form, and leaching loss phenomenon is common. The existing nutrient interception and slow release technology relies on a single carrier or a simple adsorption mechanism, so that free nutrients are difficult to intercept effectively, the nutrient supply period is short, the nutrient utilization efficiency is low, resources are wasted, and the agricultural production cost is increased. Based on the formula, the invention designs a microbial seaweed organic mixed fertilizer formula and a preparation method thereof to solve the problems. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a microbial seaweed organic mixed fertilizer formula which comprises the following raw materials in parts by weight: 30-45 parts of crop waste, 25-35 parts of excrement, 10-15 parts of composite microbial agent, 12-18 parts of modified seaweed powder, 8-12 parts of plant ash, 5-8 parts of seaweed colloid and 0.5-2 parts of modified saponin; the composite microbial agent consists of azotobacter chroococcus, bacillus subtilis and lactobacillus plantarum, wherein the mass ratio of the azotobacter chroococcus to the bacillus subtilis is 1-1.5:1.5-2:2-2.5. Further, the preparation method of the modified seaweed powder comprises the steps of mixing seaweed powder with 8-15% lactic acid solution according to the mass ratio of 1.5-2.4:4-6, placing the mixture in a constant-temperature stirring reactor, continuously stirring the mixture at the speed of 120-150rpm for 30-40min at the temperature of 65-74 ℃, and drying the mixture to obtain the modified seaweed powder. Further, the preparation method of the modified saponin comprises the steps of dissolving saponin in methanol to prepare a 10-15wt% saponin solution, dissolving maleic anhydride in diethyl ether to prepare a 12-18wt% maleic anhydride solution, dropwise adding the maleic anhydride solution into the saponin solution at the speed of 5-8 drops/min at the temperature of 20-25 ℃ according to the mass ratio of 1-1.5:0.05-0.08, stirring at the speed of 200-300rpm for 30-40min, distilling under reduced pressure to remove the solvent after stirring is completed, and drying to obtain the modified saponin. Further, the seaweed colloid is prepared by mixing seaweed powder (brown algae or red algae) and water at a mass ratio of 1:5-8, stirring at 80-85deg.C for 30-40min, and cooling to 20-25deg.C to form gel. The preparation method of the microbial seaweed organic mixed fertilizer formula comprises the following steps: S1, in a pretreatment stage, 40-50% of crop waste is mixed with all excrement, the water content is regulated to 62-65wt% by using citric acid solution with pH of 5.5-6.0, 1/3 compound microbial agent is added, and the mixture is subjected to pre-fermentation for 3-4d at 35-40 ℃ to obtain primary fermentation material; S2, in a main fermentation stage, mixing the residual crop waste, modified seaweed powder and plant ash with a primary fermentation material, spraying the residual composite microbial agent through atomization, adding seaweed colloid, and carrying out main fermentation for 5-7d at 42-48 ℃ with 1 turning over every 10-12h in the fermentation process to obtain a fermentation product; And S3, in a granulating stage, mixing the fermentation product obtained in the step S2 with the modified saponin according to the mass ratio of 100:1-3, pre-cooling for 30-60min at the temperature of-5-0 ℃, feeding the pre-cooled fermentation product and the modified saponin mixture into a granulator, controlling the rotating speed to be 80-120rpm and the pressure of compressed air to be 0.2-0.3MPa, extruding a strip-shaped material, freezing the extruded strip-shaped material for 10-15S through liquid nitrogen at the temperature of-30-20 ℃, crushing and screening the extruded strip-shaped material into particles with the particle size of 2-4mm, and