Double-control composite slow-release fertilizer and method for preparing same

A slow-release fertilizer and compound technology, which is applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of unsatisfactory slow-release effect of cemented slow-release fertilizers, reduce secondary environmental pollution, be easy to operate, and improve fertilizer The effect of utilization
CN1827559AActive Publication Date: 2006-09-06SOIL & FERTILIZER INST CHINESE ACAD OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOIL & FERTILIZER INST CHINESE ACAD OF AGRI SCI
Publication Date
2006-09-06

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Abstract

The present invention discloses a composite type of slow-release fertilizer with double control and its method for making. The said composite type of slow-release fertilizer with double control which comprises fertilizing materials of nitrogen, phosphor and kalium, cementing and bonding materials of agenthumic acid in weathered coal and clad materials is obtained by passing a screen of 60-70 meshes, mixing, pelleting, drying, bolting and cladding the said meterials. The invention adopts a measure of slow-release fertilizer wrapping slow-release fertilizer, enhances the slow-release effect and the availability ratio (10-15 %) of the fertilizer, releases slowly according to the nutrient need for the crops, simplifies the cropping agro-operation and derates the secondary environmental pollution, so it is an organic and inorganic composite type of slow-release fertilizer with multicomponent and multiple function; it is characterized in that it is of easy making technology and operation, low productive investment and cost, broad sources for stocks, high mechanical strength(>=12 N) of particles of fertilizer, no slaking, convenient transport and use, so its application prospect is broad in the production.
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Description

technical field

[0001] The invention relates to a fertilizer and a preparation method thereof, in particular to a coated and cemented double-control organic composite slow-release fertilizer and a preparation method thereof. Background technique

[0002] At present, there are mainly two types of coating materials used in coated slow-release fertilizers developed at home and abroad, one is organic polymers (such as resin polyolefins), and the other is water-insoluble or slightly soluble inorganic materials ( Such as sulfur, phosphate rock powder, calcium magnesium phosphate fertilizer, etc.). The production of polymer-coated slow-release fertilizers requires special coating towers and solvents. The coating materials are expensive, and the production process costs are relatively high. The coating materials decompose slowly in the soil and tend to remain. However, the controlled release performance of polymeric materials is better. Polymer-coated slow-release fertilizers are ...

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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