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Preparation method of slow-release compound fertilizer

A compound fertilizer and slow-release technology, applied in the direction of urea compound fertilizer, organic fertilizer, fertilizer mixture, etc., can solve the problems of inability to plant insect pest resistance, auxiliary effect of stress resistance, lack of trace elements, loss of fertility, etc., and achieve a good slowdown. release effect, enhance pest resistance, and promote plant growth

Inactive Publication Date: 2018-03-06
SICHUAN DAXIANG BAISHIDA BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing compound fertilizers are mostly a mixture of nitrogen, phosphorus, and potassium fertilizers, which lack some important trace elements, and cannot produce auxiliary effects on plant pest resistance and stress resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] A preparation method of slow-release compound fertilizer, which comprises the following processes:

[0018] (1) Extraction of humic acid

[0019] Add 2~3 times of water to the peat and stir at 30~40°C for 10~30min to obtain a peat dilution, then add sodium pyrophosphate with a mass ratio of 7‰~10‰ to the dilution to obtain a mixture , stirring at 25°C-40°C for 20-40min, then let the mixture stand or centrifuge to separate the upper liquid and the lower solid residue, the upper liquid is humic acid;

[0020] (2) Fertilizer preparation

[0021] Add urea to the obtained humic acid, stir evenly, then add compound fertilizer long-acting agent, melt and granulate; in addition, dissolve chitosan with glacial acetic acid, add boron sulfate, zinc sulfate, molybdenum sulfate, manganese sulfate, After stirring evenly, add carboxymethylcellulose sodium (CMC) to hydrolyze amino acid chelated multi-element powder. The added mass of acid-resistant CMC is 5%~7% of the humic acid. Aft...

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PUM

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Abstract

The invention discloses a preparation method of a slow-release compound fertilizer, which comprises the following steps of (1) extracting humic acid, and (2) preparing the fertilizer: adding urea to the obtained humic acid, performing uniform stirring, adding a compound fertilizer long-acting agent, performing fusion and granulation, dissolving chitosan by glacial acetic acid, adding boron sulfate, zinc sulfate, molybdenum sulfate and manganese sulfate to the chitosan, performing uniform stirring, adding sodium carboxymethylcellulose (CMC) and hydrolyzed amino acid chelation multi-element powder, performing heating to volatilize a solvent, performing mixing with a hot granular fertilizer, performing uniform stirring, and then performing natural cooling to obtain the slow-release compound fertilizer. The slow-release compound fertilizer prepared by the method is complete in nutritive value, rich in microelement, stable in property, and stable and persistent in release process.

Description

【Technical field】 [0001] The invention belongs to the field of slow-release compound fertilizer for plants. 【Background technique】 [0002] Existing compound fertilizers are mostly a mixture of nitrogen, phosphorus, and potassium fertilizers, lacking some important trace elements, and cannot produce auxiliary effects on plant pest resistance and stress resistance, and at the same time, their fertility loses quickly. 【Content of invention】 [0003] The object of the present invention is to provide a preparation method of a slow-release compound fertilizer rich in trace elements, stable in distribution of trace elements, capable of assisting the pest resistance and stress resistance of plants, and having a slow-release effect. [0004] The specific technical scheme is as follows: [0005] A preparation method of slow-release compound fertilizer, which comprises the following processes: [0006] (1) Extraction of humic acid [0007] Add 2~3 times of water to the peat and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05G3/00C05C9/00C05C11/00C05D9/02C05F11/00C05F11/02
Inventor 李大祥
Owner SICHUAN DAXIANG BAISHIDA BIOTECH