Sustained-release fertilizer

A slow-release fertilizer technology, applied in the direction of nitrogen fertilizer, fertilization device, fertilizer mixture, etc., can solve the problems of short release period of slow-release fertilizer, high fertilizer penetration ability of amino resin, no practical value, etc., and achieve the effect of low cost

Inactive Publication Date: 2018-03-06
邢治全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amino resin is a slow-release nitrogen fertilizer. The slow-release fertilizer can be made by using amino resin coating, but the amino resin has a large fertilizer penetration ability. The release period of the slow-release fertilizer made by using pure amino resin coating alone is too short, and there is no real effect. Practical value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Taking urea as the slow-release urea of ​​the present invention as the fertilizer core below as an example, some specific implementation methods and invention effects of the slow-release fertilizer of the present invention are illustrated, and the dissolution method in water is used to evaluate the slow-release performance. The dissolution method in water is to measure the slow-release urea of ​​the present invention. The dissolution rate of urea in water is as follows: soak 10 grams of the slow-release urea of ​​the present invention in 200 ml of water at a constant temperature of 25°C, and measure the initial dissolution rate and average differential dissolution rate.

[0015] Add spherical industrial urea with a particle size of 2 to 3mm into the drum coating equipment, rotate the drum to keep the spherical urea in a flowing state, and keep the temperature of the spherical urea in the drum at 95°C. The aqueous solution containing polyvinyl alcohol is slowly sprayed on...

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Abstract

The invention relates to a fertilizer and in particular relates to a sustained-release fertilizer. The sustained-release fertilizer is composed of a fertilizer core and an outer coating, wherein the outer coating is a complex film layer of a biodegradable polymer film layer. The sustained-release fertilizer disclosed by the invention has the obvious advantages that (1) the complex film layer of the biodegradable polymer film layer serves as the coating, a fertilizer is coated to prepare the coated sustained-release fertilizer, and because amino resin is a sustained-release nitrogen fertilizer,the prepared coated sustained-release fertilizer is high in nutriment and harmless to the environment; and (2) according to the sustained-release fertilizer in the invention prepared by taking the complex film layer of the biodegradable polymer film layer as the coating, a long release duration with practical value can be obtained, and the conventional problem that the sustained-release fertilizer with practical value and long release duration is difficultly obtained by independently adopting a pure amino resin film layer as the coating is solved. Particularly, the complex film layer of the biodegradable polymer film layer is harmless to the environment. Therefore, the sustained-release fertilizer disclosed by the invention is environmentally friendly and low in cost and is a complete fertilizer-coated-fertilizer type sustained-release fertilizer.

Description

technical field [0001] The invention relates to a chemical fertilizer, in particular to a slow-release chemical fertilizer. Background technique [0002] Slow-release chemical fertilizers meet the requirements of environmental protection and sustainable agricultural development, and are the development direction of agricultural chemical fertilizers in the world. Among them, coated slow-release chemical fertilizers will be the mainstream of slow-release chemical fertilizers in the future. However, the coating of the current coated slow-release chemical fertilizer products is useless to crops, and most of them cannot be degraded by the environment and will remain in the soil to pollute the environment, such as epoxy resin, polyurethane, and polyethylene. The fertilizer plastid is used as the coating material, which is harmless to the environment and high in fertilizer quality. Therefore, the slow-release chemical fertilizer is expected in the field of coated slow-release chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05C9/00C05G3/90
CPCC05C9/00C05G3/00C05G3/90C05G5/37C05G5/38
Inventor 邢治全
Owner 邢治全
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