Preparation method and coating method of biodegradable temperature-responsive slowly-controlled release fertilizer coating material

A temperature-responsive, slow- and controlled-release fertilizer technology, which is applied in fertilizer mixtures, layered/coated fertilizers, applications, etc., can solve the problems of long maintenance time of slow control, high energy consumption and cost, and many chemical additives. Achieve the effects of reducing fertilizer release, improving production efficiency, and overcoming poor degradation

CN106589258AActive Publication Date: 2017-04-26HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY
Publication Date: 2017-04-26

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Abstract

The invention relates to a preparation method and coating method of a biodegradable temperature-responsive slowly-controlled release fertilizer coating material. Agricultural organic waste containing cellulose serves as the raw material and is crushed, sieved, modified with dopamine and subjected to enzyme activation secondary treatment, and activated powder is obtained; the activated powder is mixed with a thermo-sensitive poly phosphate ester monomer, an initiator and a beta-cyclodextrin accelerant, the mixture is heated and stirred, a free radical polymerization reaction is conducted under protection of the inert gas, and the biodegradable temperature-responsive slowly-controlled release fertilizer coating material is obtained after vacuum drying is conducted; and the biodegradable temperature-responsive slowly-controlled release fertilizer coating material is heated to be a molten state and smeared on surfaces of fertilizer particles in a coating machine, and coated slowly-controlled release fertilizer can be obtained. Dopamine-activated agricultural organic waste is adopted from the angle of bionics, a polymerization reaction is effectively promoted in combination with enzyme activation secondary treatment, and production efficiency is improved; and meanwhile, the thermo-sensitive poly phosphate ester monomer serves as a cross-linking agent, the beta-cyclodextrin serves as the accelerant, and polymerization reaction time is shortened, so that the fertilizer intelligently regulates and controls nutrients along with soil temperature change.

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Description

technical field

[0001] The invention belongs to the technical field of materials and slow-controlled release fertilizers, and in particular relates to a preparation method of a degradable temperature-responsive slow-controlled release fertilizer coating material and a coating method thereof. Background technique

[0002] As a "high-tech environmental protection fertilizer in the 21st century", the slow-release fertilizer is to regulate the polymer coating on the surface of the fertilizer so that the nutrients wrapped in it are released slowly initially, prolonging the effective period for the crops to absorb and utilize the effective nutrients, so that the nutrients can be absorbed and utilized according to the set Fertilizers with slow or controlled release rate and release period, so as to improve fertilizer utilization efficiency and achieve the purpose of one-time fertilization and precise fertilization.

[0003] Coating materials can be divided into three main forms: in...

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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