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Compound type slow release fertilizer and preparing method thereof

A slow-release fertilizer, compound technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of inability to be adsorbed by soil, volatile ammonia, and high nitrogen loss, and achieve simple preparation methods, high absorption rate, and soil. damage mitigation effect

Active Publication Date: 2012-09-05
BEIJING KINGTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nitrogen is the most important nutrient element for crop growth. Urea is the most important variety of nitrogen fertilizer. Urea is suitable for all crops and all soils. It can be used as base fertilizer and topdressing fertilizer. It can be applied in both dry and paddy fields. However, urea is a molecule before transformation. In the state, it cannot be absorbed by the soil and is lost with water. The ammonia formed after transformation is also volatile. The loss of nitrogen in the soil is too high, the utilization rate is only 30%-40%, and the fertilizer effect period is only about 50 days. Waste also brings enormous pressure to the atmospheric environment and water environment, and is a serious non-point source of pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: Composite slow-release fertilizer, the weight parts of its raw materials are: 50 parts of urea, 10 parts of cellulose, 15 parts of bran, 3 parts of water-retaining agent, 1 part of sawdust, 10 parts of straw ash, 5 parts of ammonium phosphate, 3 parts of calcium powder 2 parts of potassium sulfate, 5 parts of attapulgite, 5 parts of borax, 3 parts of ferrous sulfate, 3 parts of yeast microbial fertilizer, 3 parts of nitrogen-fixing bacteria fertilizer and 3 parts of talcum powder.

[0010] The preparation method of described composite slow-release fertilizer, comprises the following steps:

[0011] Weigh each raw material according to the weight of the constituent raw materials, pulverize it, put it into a fermentation tank, add water until the water content of the material is 40-50%, blow air and stir at the same time, and dry the fermented mixture at a low temperature of 30-40°C. Make the water content at 8-10%, and finally granulate to obtain a compound s...

Embodiment 2

[0012] Example 2: Composite slow-release fertilizer, the weight parts of its raw materials are: 60 parts of urea, 20 parts of cellulose, 25 parts of bran, 8 parts of water-retaining agent, 2 parts of sawdust, 15 parts of straw ash, 10 parts of ammonium phosphate, 5 parts of calcium powder 5 parts of potassium sulfate, 15 parts of attapulgite, 10 parts of borax, 8 parts of ferrous sulfate, 5 parts of yeast microbial fertilizer, 5 parts of nitrogen-fixing bacteria fertilizer and 5 parts of talcum powder.

[0013] The preparation method of compound slow-release fertilizer comprises the following steps:

[0014] Weigh each raw material according to the weight of the constituent raw materials, crush them, and put them into the fermentation tank. The attapulgite is added in the form of mud spraying to increase water retention, and water is added until the water content of the material is 40-50%. At the same time, blasting and stirring are carried out. Dry the fermented mixture at ...

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PUM

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Abstract

The invention discloses compound type slow release fertilizer and a preparing method thereof. The preparing method comprises the main steps of: mixing constituted raw materials including urea, cellulose, bran, a water-retaining agent, saw dust, straw ash, polypropylene, ammonium phosphate, calcium powder, potassium sulfate, attapulgite, borax, ferrous sulfate, yeast microbial fertilizer, azotobacter fertilizer and talcum powder according to certain part by weight and carrying out fermentation so as to obtain the compound type slow release fertilizer. The preparing method provided by the invention is simple, the prepared compound type slow release fertilizer can effectively achieve lodging resistance, disease resistance and drought resistance of crops, the crops have high absorptivity and good water absorb performance, and damage to soil can be correspondingly relieved.

Description

technical field [0001] The invention relates to the field of organic fertilizer manufacturing, in particular to a composite slow-release fertilizer and a preparation method thereof. Background technique [0002] Nitrogen is the most important nutrient element for crop growth. Urea is the most important variety of nitrogen fertilizer. Urea is suitable for all crops and all soils. It can be used as base fertilizer and topdressing fertilizer. It can be applied in both dry and paddy fields. However, urea is a molecule before transformation. In the state, it cannot be absorbed by the soil and is lost with water. The ammonia formed after transformation is also volatile. The loss of nitrogen in the soil is too high, the utilization rate is only 30%-40%, and the fertilizer effect period is only about 50 days. Waste also brings enormous pressure to the atmospheric environment and water environment, and is a serious non-point source pollution source. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 杨红兵陈金华刘俊秋
Owner BEIJING KINGTEC
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