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Microbial synergistic compound fertilizer and preparation method thereof

A compound fertilizer and microbial technology, which is applied in the field of microbial synergistic compound fertilizer and its preparation, can solve the problems of decreased survival rate of microorganisms, failure to function, high humidity of fertilizer, etc., achieve sterilization and degradation of heavy metals, improve fertilizer utilization rate, The effect of improving the soil

Pending Publication Date: 2019-04-05
河北百禾丰化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some problems: (1) The current fertilizers contain a high proportion of inorganic nutrients, which leads to a significant decrease in the survival rate of microorganisms in an inorganic salt environment; (2) The current production of fertilizers includes a heat-drying stage and a cooling process stage , if the bacterial liquid is added in the hot drying stage, due to the high drying temperature, the high temperature will cause most of the bacterial species to die, and the microbial bacterial agent cannot play a role in the fertilizer; and the bacterial liquid is added in the cooling process, then The addition of bacterial solution is likely to cause high humidity in the fertilizer

Method used

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  • Microbial synergistic compound fertilizer and preparation method thereof

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Effect test

Embodiment 1

[0040] This embodiment provides a microbial synergistic compound fertilizer, which is prepared according to the following method:

[0041] S1: Granulate urea, ammonium monohydrogen phosphate, and potassium nitrate in a drum, dry them, pass through a 6-mesh sieve, sieve and crush the large particles and return to granulation, and sieve the small particles for the first low-temperature drying. Dry at 40-50°C, pass through a 12-mesh sieve again, sieve the small particles and return to granulation, keep the large particles and sieve to obtain compound fertilizer granules with a particle size of 1.5mm-2.5mm.

[0042] S2: In the drum, make the compound fertilizer granules in a fluidized state, and use a pressure pump to evenly spray the adhesive onto the surface of the fluidized compound fertilizer granules. The binder is formed by dissolving alginic acid in potassium hydroxide aqueous solution, and the viscosity is 400mPa.s.

[0043] S3: Spray the mixed bacterial powder containing...

Embodiment 2

[0046] This embodiment provides a microbial synergistic compound fertilizer, which is prepared according to the following method:

[0047] S1: Granulate urea, ammonium monohydrogen phosphate, and potassium nitrate in a drum, dry them, pass through a 6-mesh sieve, sieve and crush the large particles and return to granulation, and sieve the small particles for the first low-temperature drying. Dry at 45~50°C, pass through a 12-mesh sieve again, sieve the small particles and return to granulation, keep the large particles and sieve to obtain compound fertilizer granules with a particle size of 1.5mm~2.5mm.

[0048] S2: In the drum, make the compound fertilizer granules in a fluidized state, and use a pressure pump to evenly spray the adhesive onto the surface of the fluidized compound fertilizer granules. The adhesive is formed by dissolving alginic acid in potassium hydroxide aqueous solution, and the viscosity is 300mPa.s.

[0049] S3: At 42-45°C, when the adhesive has not yet...

Embodiment 3

[0052] This embodiment provides a microbial synergistic compound fertilizer, which is prepared according to the following method:

[0053] S1: Granulate urea, ammonium monohydrogen phosphate, and potassium nitrate in a drum, dry them, pass through a 6-mesh sieve, sieve and crush the large particles and return to granulation, and sieve the small particles for the first low-temperature drying. Dry at 45~50°C, pass through a 12-mesh sieve again, sieve the small particles and return to granulation, keep the large particles and sieve to obtain compound fertilizer granules with a particle size of 1.5mm~2.5mm.

[0054] S2: In the drum, make the compound fertilizer granules in a fluidized state, and use a pressure pump to evenly spray the adhesive onto the surface of the fluidized compound fertilizer granules. The adhesive is formed by dissolving alginic acid in potassium hydroxide aqueous solution, and the viscosity is 500mPa.s.

[0055] S3: At 42~45°C, before the adhesive is solidi...

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Abstract

The invention relates to a microbial synergistic compound fertilizer and a preparation method thereof. The preparation method includes firstly, granulating, drying and sieving a nitrogen-containing compound, a phosphorus-containing compound and a potassium-containing compound in a rotating drum, returning large particles to granulation after sieving and crushing, sieving the small particles for the first low-temperature drying treatment, returning the small particles to granulation after sieving again, retaining large particles to obtain compound fertilizer particles with predetermined particle size after sieving; secondly, uniformly spraying the adhesive to the surface of fluidized compound fertilizer particles by a pressure pump, wherein the adhesive is formed by alginic acid dissolvingin potassium hydroxide solution with a viscosity of 100-500 mPa.s; thirdly, spraying mixed bacterial powder containing bacillus subtilis, bacillus megatherium, bacillus mucilaginosus and bacillus laterosporus to the adhesive of the compound fertilizer particles under 40-45 DEG C before the adhesive loses stickiness; performing a second low-temperature drying treatment, venting and drying under 40-45 DEG C to obtain the microbial synergistic compound fertilizer. With adding of a high salt-tolerant strain as selected and cooperation of the unique technique, the survival rate of the strains can be increased.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a microbial synergistic compound fertilizer and a preparation method thereof. Background technique [0002] The stress resistance of crops refers to certain traits that crops have to resist unfavorable environments; such as cold resistance, drought resistance, salt resistance, pest resistance, etc. The level of stress resistance of crops determines the growth of crops in unfavorable environments. state. In order to ensure better harvests of crops, the stress resistance of crops can be enhanced by applying microbial fertilizers. However, there are still some problems: (1) The current fertilizers contain a high proportion of inorganic nutrients, which leads to a significant decrease in the survival rate of microorganisms in an inorganic salt environment; (2) The current production of fertilizers includes a heat-drying stage and a cooling process stage , if the bacterial liqui...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/08C05G3/80C05G3/90
CPCC05B7/00C05G3/00C05G3/90C05G3/80C05C5/02C05C9/00C05D1/00C05F11/00C05F11/02C05F11/08
Inventor 董晓伟安德刚王福生苏永群
Owner 河北百禾丰化肥有限公司
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