Polymorphic controlled-release fertilizer and preparation method thereof

A controlled-release fertilizer and multi-form technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problem of crop controlled-release fertilizers being greatly affected by soil moisture, temperature, and soil quality, and the peak value of fertilizer release The control point is difficult to grasp and other problems, and the expected release target is good, it is conducive to full absorption, and the effect of low biuret content is achieved

Active Publication Date: 2014-07-16
STANLEY AGRI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Slow / controlled release fertilizers have beneficial effects such as reducing nutrient loss, increasing fertilizer use efficiency, improving soil structure, increasing yield, and improving crop quality. However, the current special slow-release fertilizers have only one nitrogen release peak, which is not suitable for different growth of crops. The growth demand in the vigorous period is likely to cause the problems of low fertilizer utilization rate and slow increase of crop yield
Some manufacturers use thermoplastic resin-coated urea, thermosetting resin-coated urea, sulfur-coated urea, potassium fertilizer, and phosphate fertilizer to form controlled-release fertilizers, which already have multiple fertilizer release peaks; , temperature, and soil quality are greatly affected, and it is difficult to control the peak release point of fertilizer, and the controlled release film cannot be completely degraded, which is easy to cause pollution to the soil
[0004] Therefore, the existing slow and controlled-release fertilizers generally have defects such as heavy non-point source pollution and incomplete degradation of the controlled-release film; crop controlled-release fertilizers are greatly affected by soil humidity, temperature, and soil quality, and the expected release target is poor.

Method used

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  • Polymorphic controlled-release fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1: Preparation of polymorphic wheat controlled release fertilizer, 24-12-12.

[0066] Raw material component parts by weight are as follows:

[0067] 40 parts of urea,

[0068] 8 parts of ammonium nitrate,

[0069] 3 parts of formaldehyde,

[0070] Potassium sulfate 24 parts,

[0071] 23 parts of monoammonium phosphate,

[0072] 2 parts of medium and micro fertilizer.

[0073] Preparation:

[0074] 1. Mix 40 parts of urea and 8 parts of ammonium phosphorus nitrate at the bottom of the tower and then add them to the melting tank, add melting agent and viscosity reducing agent into the melting tank, the molten slurry enters the buffer tank, and part of it is sent to phosphoric acid after metering In the ammonium mixing tank, a part of the urea-formaldehyde removal reaction pump inlet.

[0075] 2. At the inlet of the urea-formaldehyde reaction pump, under the action of the melting agent and the viscosity reducing agent, add formaldehyde vapor with a mass fr...

Embodiment 2

[0078] Example 2: Preparation of Polymorphic Corn Controlled Release Fertilizer, 20-10-15.

[0079] Raw material component parts by weight are as follows:

[0080] 30 parts of urea,

[0081] 10 parts of ammonium nitrate,

[0082] 3 parts of formaldehyde,

[0083] Ammonium sulfate 5 parts,

[0084] Potassium sulfate 30 parts,

[0085] 19 parts of monoammonium phosphate,

[0086] 3 parts of medium and micro fertilizer.

[0087] The preparation process is the same as in Example 1.

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Abstract

The invention discloses a multi-form controlled-release fertilizer and relates to the technical field of agricultural fertilizers. It uses 10-70 parts of urea, 5-30 parts of ammonium nitrate, 1-15 parts of formaldehyde, 0-20 parts of ammonium sulfate, 10-50 parts of potassium sulfate, 5-50 parts of monoammonium phosphate, and 1-15 parts of medium and micro fertilizers. Parts are used as raw materials, and multi-form controlled-release fertilizers are obtained by mixing, granulating, and cooling. The multi-form controlled-release fertilizer of the present invention has the advantages of achieving controlled release and synergizing efficiency, complementing multiple nutrients, improving nitrogen fertilizer utilization rate, being completely degraded, and being green and pollution-free.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a multi-morphic controlled-release fertilizer. Background technique [0002] The Food and Agriculture Organization of the United Nations (FAO) and authoritative agricultural experts believe that the contribution of chemical fertilizers accounts for about 40% to 50% of the factors that increase crop production. The application of chemical fertilizers has laid a material foundation for the production and development of modern agriculture and the protection of human food security. However, the low utilization rate of chemical fertilizers and the resulting high environmental risks have always been a major problem plaguing the world. Therefore, countries all over the world are actively exploring methods and approaches to improve fertilizer utilization and curb environmental pollution. Among them, slow / controlled release fertilizer is an environmentally friendly fertil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00C05G1/06C05G1/10C05C13/00
Inventor 高进华白由路高苏茂周丽解学仕陈大印赵玉平李元峰孙士俊
Owner STANLEY AGRI GRP CO LTD
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