Allylthiourea modified konjac glucomannan copolymer material and slow-release nitrogen fertilizer

A technology of konjac glucomannan and allyl thiourea is applied in the direction of fertilizer form, fertilization device, fertilizer mixture, etc., to achieve the effect of promoting maximum utilization rate, enhancing air permeability and strong renewability of raw materials
CN102863587AActive Publication Date: 2013-01-09CHINA THREE GORGES UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA THREE GORGES UNIV
Publication Date
2013-01-09

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Abstract

The invention relates to an allylthiourea modified konjac glucomannan (KGM) copolymer coating material and a slow-release nitrogen fertilizer. The method comprises a preparation method of the coating mainly made of the modified KGM copolymer and a preparation method of the coated slow-release fertilizer. The optimization conditions of super-absorbent property, fertilizer-keeping property, soil nitrification resistance and the preparation technology and parameters of the slow-release fertilizer can be obtained, and the problem of evaluating the slow-release effect of the coating can be solved. The preparation technology of the coated slow-release fertilizer is simple, the fertilizer is cheap; when the coated slow-release fertilizer is prepared, the coating material can be used as both a coating agent and an adhesive; the water-absorbing property and fertilizer-keeping property of the coating material are respectively increased to 600 times and 350 times as compared with those of konjaku flour, thus the slow-release effect is obviously increased; and the coating material can be completely degraded, no eco-environmental risk is caused, the chemical fertilizer can be utilized to the greatest extent and the pollutions of the chemical fertilizer to the agroecological environment can be reduced.
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Description

technical field

[0001] The invention relates to a preparation method of an allylthiourea modified konjac glucomannan (KGM) copolymer slow-release material; the invention also relates to a slow-release fertilizer prepared by using the slow-release material. Background technique

[0002] In recent years, the huge waste of resources caused by the loss of soil fertilizer, the deterioration of the ecological environment, and the impact on crop quality and yield economy have received keen attention from all walks of life. After urea is applied to the soil, it can be completely converted into NH in 4-5 days under the action of urease 3 and CO 2 , NH 3 Part of the N in the soil is adsorbed by the soil for use in the early stage of plant growth, and a considerable part of the NH 3 It is acted by soil microorganisms into nitrite, nitrate and nitrogen oxides, causing environmental pollution. The preparation of Slow Release Urea (SRU for short) by coating technology is one of the mo...

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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