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A kind of degradable slow-release fertilizer and preparation method thereof

A slow-release fertilizer technology, applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problem of environmental damage, fertilizer release rate can not meet the demand of crop nutrient peak fertilizer demand, limit the large-scale application of slow-release fertilizer, etc. problem, to achieve high efficiency, improve distribution uniformity, and easy operation

Active Publication Date: 2016-05-18
SHENYANG SIXIONGDI FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the research progress of corrosion-inhibiting fertilizers, there are the following deficiencies: the release rate of fertilizers cannot meet the demand of crop nutrients during the peak period of fertilizer demand; price factors limit the large-scale application of slow-release fertilizers; slow-release fertilizers currently on the market Long-term application of fertilizers can damage the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of degradable slow-release fertilizer is characterized in that: comprising the following steps:

[0025] (1) On the disc granulator, according to the conventional disc granulation method, spray the binder solution to wet the surface of the soluble nitrogen fertilizer granules;

[0026] (2) Coating: The endoplasmic slow-release material is transported to the front end of the coating machine and sprayed evenly by air atomization, and the terminal of the coating machine is added with natural oil film material;

[0027] (3) Cooling and packaging: The coated fertilizer is fully mixed, cooled and packaged to obtain the finished product.

Embodiment 1

[0029] A kind of degradable slow-release fertilizer, the weight percent of each component of raw material is:

[0030] Urea Granules 72%

[0031] Endoplasmic slow-release layer 12%

[0032] Natural oil film layer 16%

[0033] The parts by weight of the raw materials of the endoplasmic sustained-release layer are: 7 parts of white carbon black, 6 parts of wood flour, 10 parts of polyvinyl alcohol, 8 parts of polyacrylamide, 0.9 parts of sodium naphthalene acetate, 6-benzyl 0.6 part of aminopurine; parts by weight of the raw materials of the natural oil film layer are: 0.5 part of sulfited castor oil, 0.3 part of soybean lecithin, 0.4 part of shellac, 0.6 part of amber, and 0.6 part of urea-formaldehyde resin.

[0034] In order to illustrate the superiority of the degradable slow-release fertilizer of the present invention, a comparative test is carried out, and the degradable slow-release fertilizer of the present invention and the slow-release fertilizer (comparative example...

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PUM

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Abstract

The invention discloses a biodegradable slow-release fertilizer and a preparation method thereof. The biodegradable slow-release fertilizers comprises an easily-soluble nitrogen granular fertilizer, an endoplasmic slow-release layer coating the granular fertilizer and a natural fatty coating layer coating the endoplasmic slow-release layer, wherein the easily-soluble nitrogen is one or more than one of free amino acid, amine salts an amides compound; the raw materials of the endoplasmic slow-release layer are white carbon black, wood powder, polyvinyl alcohol, polyacrylamide, sodium naphthalene acetate and 6-benzylaminopurine; and the raw materials of the natural fatty coating layer are sulfitated castor oil, soybean lecithin, shellac, amber and urea-formaldehyde resin. In the biodegradable slow-release fertilizer disclosed by the invention, the slow-release material is added and is fast degraded and no secondary pollution is generated; since a coating method is adopted in the slow-release coating material disclosed by the invention, the uniformly mixed material directly reaches the surface of the fertilizer, and the distribution uniformity of the coating material on the surface of the fertilizer particles is improved.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, in particular to a degradable slow-release fertilizer, and also to a preparation method of the fertilizer. Background technique [0002] The demand for nutrients for crop growth is a spontaneous process. Fertilizer is one of the most important means of production in agricultural production, the material basis for sustainable agricultural development, and the largest material investment in agricultural production, accounting for about 50% of all productive expenditures. %. The Food and Agriculture Organization of the United Nations estimates that 55% of the increase in food production in developing countries comes from the effect of fertilizers, and this is also the case for cash crops. my country's fertilizer production and consumption ranks among the top in the world. In recent years, due to the loss and inefficient use of fertilizers, serious waste of resources and huge economic losses hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 李勇
Owner SHENYANG SIXIONGDI FERTILIZER