Resin film coated controlled-release fertilizer and preparation method

A controlled-release fertilizer and resin-coated technology, applied in the form of fertilizer, fertilizer mixture, fertilization device, etc., can solve the problems of reducing the nitrogen utilization rate of fertilizers, easy leaching of nitrate nitrogen, and increased ammonia volatilization, so as to improve the utilization rate , production cost reduction, and the effect of improving the use effect
CN101200399AInactive Publication Date: 2008-06-18SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
Publication Date
2008-06-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a controlled-release fertilizer, substantially a resin-coated controlled-release fertilizer which is prepared by coating with biochemical inhibitor on the surface of urea granules and a preparation method. The urease inhibitor or / and nitrification inhibitor is mixed with the copolymer of acrylic resin and ethyl cellulose as well as organic solvent to form the suspension; and the suspension is equably coated on the surface of the urea granules so as to make the coated urea core fertilizer; and then the surface of the coated urea core fertilizer is wrapped with crylic acid resin film. Based on making the coated inhibitor urea core fertilizer with the biochemical inhibitor in the first layer, the coating is implemented, which are processed in two steps. The most notable characteristic of the controlled-release fertilizer is that the coating is implemented on the basis of making the coated inhibitor urea core fertilizer with the biochemical inhibitor in the first layer, thereby the coating is tight, and the result on controlling biochemical inhibitor and urea release is obvious.
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Description

technical field

[0001] The invention relates to a controlled-release fertilizer, in particular to a resin-coated controlled-release fertilizer in which the fertilizer is coated with a biochemical inhibitor on the surface of urea granules and a preparation method thereof. Background technique

[0002] Ordinary nitrogen fertilizer has a short fertilizer effect period, low fertilizer nitrogen utilization rate, and the overall utilization rate of urea nitrogen is only 35-40%. The loss of nitrogen is relatively large, and the economic benefit of nitrogen application is low, which not only causes a huge waste of resources but also increase the cost of agricultural production. Long-term application of nitrogen fertilizers produces non-point source pollution, causing greenhouse effect and eutrophication of water bodies, and deteriorating the ecological environment. In order to alleviate these problems, it is necessary to improve the performance of nitrogen fertilizers, so that nitr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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