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Preparation method of high-performance bio-based water and fertilizer slow-release material

A slow-release material, bio-based technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve problems such as late research on controlled/slow-release fertilizers

Inactive Publication Date: 2021-04-16
TIANJIN AGRICULTURE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] my country is a big country in fertilization, but the research on controlled / slow-release fertilizers is relatively late

Method used

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  • Preparation method of high-performance bio-based water and fertilizer slow-release material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First crush 5g of corn stalks into 40-60mesh granules, add them to 50g of 10% potassium hydroxide solution under stirring conditions and react at 20°C for 100min to obtain an alkaline liquid mixture, then add 5g of kaolin to the alkali Stir in the alkaline liquid mixture for 10 minutes, and finally mix 10 g of acrylamide, humic acid, acetic acid, and ammonium persulfate at a mass ratio of 0.99:1:98:0.01 and add it to the alkaline liquid mixture, and continue the reaction at 20°C 100min. The reacted mixture is taken out, dried and dehydrated to obtain a high-performance bio-based water and fertilizer slow-release material.

Embodiment 2

[0021] 50g of soybean stalks were crushed into 120-160 mesh particles, added to 500g of sodium hydroxide solution with a mass fraction of 30% under stirring conditions and reacted at 100°C for 5min to obtain an alkaline liquid mixture, and then 50g of diatomaceous earth was added to the Stir in the alkaline liquid mixture for 1 min, and finally mix 100 g of polyacrylamide, humic acid, citric acid, and ammonium cerium nitrate in a mass ratio of 0.05:10:89:0.95 and add it to the alkaline liquid mixture. Continue to react for 1 min. The reacted mixture is taken out, dried and dehydrated to obtain a high-performance bio-based water and fertilizer slow-release material.

Embodiment 3

[0023] Crush 20g of plant stalks into 80-100mesh granules, add them to 100g of 20% sodium hydroxide solution under stirring conditions and react at 50°C for 40min to obtain an alkaline liquid mixture, then add 200g of clay to the alkaline Stir in the liquid mixture for 50 minutes, and finally mix 50 g of N,N-methylenebisacrylamide, humic acid, acrylic acid, and sodium persulfate in a mass ratio of 2:40:57:1 and add them to the alkaline liquid mixture , Continue to react at 50°C for 50min. The reacted mixture is taken out, dried and dehydrated to obtain a high-performance bio-based water and fertilizer slow-release material.

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Abstract

The invention provides a preparation method of a high-performance bio-based water and fertilizer slow-release material, which comprises the following steps: pulverizing a certain mass of plant straw into particles, adding the particles into a prepared strong alkali solution under stirring, and performing reacting at a certain temperature to obtain an alkaline liquid mixture; then adding a certain mass of inorganic porous material into the alkaline liquid mixture, performing stirring, finally mixing organic amide, humic acid, organic acid and a metal inorganic salt initiator according to a certain proportion, adding the mixture into the alkaline liquid mixture, and continuously performing reacting at a certain temperature; and taking out the reacted mixture, and performing drying to obtain the high-performance bio-based water and fertilizer slow-release material. On the basis of existing research, the preparation process of the bio-based high-water-absorptivity water-fertilizer slow-release material is optimized, the preparation method which is easy to operate, easy to control, low in cost and efficient in yield is obtained, and the preparation method is particularly suitable for meeting the requirement for application and popularization of the water-fertilizer slow-release material in agricultural production.

Description

technical field [0001] The invention belongs to the technical field of new chemical materials, and in particular relates to a preparation method of a degradable high-performance bio-based slow-release material for water and fertilizer. Background technique [0002] It is generally believed that inorganic fertilizers are not only easily absorbed by crops, but also easily lost. In the traditional method, increasing chemical fertilizer is an important way to obtain high yield, but a large amount of chemical fertilizer input has brought about a series of problems such as the decrease of fertilizer utilization rate, the decrease of economic benefit, the aggravation of environmental pollution and the deterioration of ecological environment. At the same time, unreasonable application methods have further prompted farmers to increase fertilizer input, the loss of nitrogen in the soil is too high, the utilization rate is only 30-40%, only 60-70% of developed countries, and the fertil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/80
Inventor 刘文孔庆霞于建霖刘敏郝莹翁梓冰李兆君雷海波于杰韦佳姣韩秋凤潘虹
Owner TIANJIN AGRICULTURE COLLEGE
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