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Anti-drought slow-release compound fertilizer and preparation method thereof

A technology of slow-release compound fertilizer and compound fertilizer, which is applied in the direction of fertilization equipment, fertilizer mixture, application, etc., can solve the problems of insufficient research on fertilizers, and achieve the effects of prolonging fertilizer efficiency, cheap price, and high gel strength

Inactive Publication Date: 2012-08-08
INST OF AGRI RESOURCES & ENVIRONMENT HEBEI ACADEMY OF AGRI & FORESTRY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Slow-release fertilizers have received widespread attention at home and abroad, but there are not many studies on fertilizers that have both slow-release functions and drought-resistant and moisture-conserving functions.

Method used

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  • Anti-drought slow-release compound fertilizer and preparation method thereof
  • Anti-drought slow-release compound fertilizer and preparation method thereof
  • Anti-drought slow-release compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The weight ratios of the components contained in the water and fertilizer isolation maintenance layer of the first embodiment of the present invention and the compound fertilizer are respectively: 12.5% ​​of pregelatinized starch, 1.6% of hydroxyethyl starch, 0.65% of magnesium stearate, Yellow dextrin 0.75%, borax 0.2%; the weight ratios of each component contained in the slow-release layer and the compound fertilizer are respectively: 19.5% of multifunctional slow-control release agent, 5.5% of bentonite; Each component and its weight ratio with the compound fertilizer are respectively: 17.9% of high-efficiency drought-resisting agent, 2.8% of carboxymethyl cellulose, 1.5% of polyaspartic acid, 4.5% of kaolin, and 0.9% of talcum powder. Among them, the particle size of multifunctional slow and controlled release agent, high-efficiency drought-resistant agent, magnesium stearate, yellow dextrin, and borax is less than 0.25mm; the water absorption rate of high-efficiency...

Embodiment 2

[0054] The weight ratios of the components contained in the water and fertilizer isolation maintenance layer of the second embodiment of the present invention and the compound fertilizer are respectively: 12.9% of pregelatinized starch, 1.8% of hydroxyethyl starch, 0.69% of magnesium stearate, Yellow dextrin 0.80%, borax 0.15%; the weight ratios of each component contained in the slow-release layer and the compound fertilizer are respectively: 13% of multifunctional slow-control release agent, 12.2% of bentonite; The weight ratios of each component and the compound fertilizer are: 14% of high-efficiency drought-resisting agent, 2.5% of carboxymethyl cellulose, 1.2% of polyaspartic acid, 3.0% of kaolin, and 1.2% of talcum powder. Among them, the particle size of multifunctional slow and controlled release agent, high-efficiency drought-resistant agent, magnesium stearate, yellow dextrin, and borax is less than 0.25mm; the water absorption rate of high-efficiency drought-resistan...

Embodiment 3

[0058] The weight ratios of the components contained in the water and fertilizer isolation maintenance layer of the third embodiment of the present invention and the compound fertilizer are respectively: 12.2% of pregelatinized starch, 1.5% of hydroxyethyl starch, 0.73% of magnesium stearate, Yellow dextrin 0.85%, borax 0.25%; the weight ratios of each component contained in the slow-release layer and the compound fertilizer are respectively: 9.6% of multifunctional slow-control release agent, 14.8% of bentonite; Each component and its weight ratio with the compound fertilizer are respectively: 9.9% of high-efficiency drought-resisting agent, 3.4% of carboxymethyl cellulose, 0.8% of polyaspartic acid, 2% of kaolin, and 1.5% of talcum powder. Among them, the particle size of multifunctional slow and controlled release agent, high-efficiency drought-resistant agent, magnesium stearate, yellow dextrin, and borax is less than 0.25mm; the water absorption rate of high-efficiency dro...

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Abstract

The invention discloses an anti-drought slow-release compound fertilizer and a preparation method thereof. The anti-drought slow-release compound fertilizer comprises compound fertilizers and the following three coating layers which coat the compound fertilizers from inside to outside: a water-fertilizer isolating and curing layer, a slow-release layer and a moisture adjusting layer. The anti-drought slow-release compound fertilizer has anti-drought function, supports slow release of the compound fertilizers and is simultaneously environment-friendly and low in cost. The preparation method ischaracterized by firstly physically mixing respective components of the three coating layers, the compound fertilizers and polyethylene glycol aqueous solution uniformly in proportion, then coating the three coating layers on the compound fertilizers by a granulator from inside to outside in sequence, and finally taking the compound fertilizers out of the granulator and drying the compound fertilizers in the sun or in a drying machine at 55-65 DEG C until the moisture content is less than 10%.

Description

technical field [0001] The invention relates to an agricultural chemical fertilizer, in particular to a slow-release compound fertilizer with a drought-resistant function. The invention also relates to a preparation method of the drought-resistant slow-release compound fertilizer. Background technique [0002] Due to factors such as loss, volatilization, infiltration, and soil caking, the utilization rate of fertilizers in agricultural production is low. Generally, nitrogen fertilizers are 18%-45%, phosphorus fertilizers are 12.5%-30%, and potassium fertilizers are 30%-50%. This not only causes direct economic loss, but also causes serious environmental pollution. The raw materials for compound fertilizer production are urea, phosphate fertilizer and potash fertilizer, all of which come from non-renewable precious resources such as natural gas, petroleum gas, coke oven gas, coal, etc. Therefore, improving the utilization rate of fertilizers can greatly save resources and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 王丽英仵志玲张彦才仵志松翟彩霞仵屹陈丽莉李若楠康博豪仵志慈苗鹏宇仵刚成
Owner INST OF AGRI RESOURCES & ENVIRONMENT HEBEI ACADEMY OF AGRI & FORESTRY SCI