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Preparation method of special controlled-release fertilizer for sorghum

A technology for controlled-release fertilizer and sorghum, which is applied in the field of preparation of special controlled-release fertilizer for sorghum, can solve problems such as environmental pollution and economic losses of farmers, and achieve the effects of prolonging retention time and reducing leaching loss.

Inactive Publication Date: 2017-02-15
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will not only cause economic losses to farmers, but also pollute the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Preparation of fat core

[0034] Weigh 120 parts of urea, 80 parts of potassium dihydrogen phosphate, 90 parts of calcium phosphate, 8 parts of trace element fertilizer, crush and sieve through a 150 mesh sieve, add 5 parts of 3,4-dimethylpyrazole phosphate, 4 parts of acrylic resin portion, stirred evenly, and granulated in a granulator according to a conventional method to obtain a fertilizer core. Wherein the trace element fertilizer is composed of 3 parts of borax, 3 parts of zinc sulfate and 2 parts of manganese sulfate;

[0035] 2) Preparation of coating agent

[0036] Weigh 6 parts of polylactic acid, 4 parts of polyurethane, 3 parts of modified starch, 2 parts of cobalt acetylacetonate, 2 parts of ethanol, and 2 parts of water to make a coating agent according to the coating process. In the coating process, after the required raw materials are added to the reaction kettle, the temperature is raised to 70° C., stirred and kept for 3 hours, and after the heat...

Embodiment 2

[0040] 1) Preparation of fat core

[0041] Weigh 200 parts of urea, 130 parts of potassium dihydrogen phosphate, 140 parts of calcium phosphate, 15 parts of trace element fertilizer, crush and sieve through a 200-mesh sieve, add 9 parts of 3,4-dimethylpyrazole phosphate, 10 parts of acrylic resin Parts, stirred evenly, granulated in a granulator according to a conventional method to obtain a fertilizer core; wherein the trace element fertilizer is composed of 6 parts of borax, 5 parts of zinc sulfate, and 4 parts of manganese sulfate.

[0042] 2) Preparation of coating agent

[0043] Weigh 15 parts of polylactic acid, 8 parts of polyurethane, 5 parts of modified starch, 5 parts of cobalt acetylacetonate, 4 parts of ethanol, and 4 parts of water to make a coating agent according to the coating process. In the coating process, the required raw materials are added to the reactor, the temperature is raised to 70°C, stirred and kept for 5 hours, after the heat preservation is comp...

Embodiment 3

[0046] 1) Preparation of fat core

[0047] Weigh 150 parts of urea, 100 parts of potassium dihydrogen phosphate, 120 parts of calcium phosphate, 13 parts of trace element fertilizer, crush and sieve through a 200-mesh sieve, add 7 parts of 3,4-dimethylpyrazole phosphate, 7 parts of acrylic resin portion, stirred evenly, and granulated in a granulator according to a conventional method to obtain a fertilizer core. Wherein the trace element fertilizer is composed of 5 parts of borax, 5 parts of zinc sulfate and 3 parts of manganese sulfate;

[0048] 2) Preparation of coating agent

[0049] Weigh 10 parts of polylactic acid, 6 parts of polyurethane, 4 parts of modified starch, 4 parts of cobalt acetylacetonate, 3 parts of ethanol, and 3 parts of water to make a coating agent according to the coating process. In the coating process, the required raw materials are added to the reactor, the temperature is raised to 60°C, stirred and kept for 3 hours, after the heat preservation is...

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Abstract

The invention discloses a preparation method of a special controlled-release fertilizer for sorghum. After a fertilizer core is prepared by urea, monopotassium phosphate, calcium phosphate, a trace element fertilizer, an inhibitor and a dispersing agent, the fertilizer core is subjected to coating processing by using a coating agent prepared from polylactic acid, polyurethane, modified starch, acetylacetone cobalt, ethyl alcohol and water, so as to obtain the special controlled-release fertilizer for the sorghum. According to the preparation method, compared with the prior art, the prepared controlled-release fertilizer is sufficient in nutrient element and high in utilization rate of a nitrogen fertilizer, can be decomposed under the light, has controlled-release performance, and can meet nutrition requirements of the sorghum in each growth period; meanwhile, a coating is environmental-friendly, is completely degradable, and cannot damage the surrounding environment.

Description

technical field [0001] The invention relates to the field of controlled-release fertilizers, in particular to a method for preparing a special controlled-release fertilizer for sorghum. Background technique [0002] The earliest occurrence in the "History of Droughts in China" was the severe drought in the Yiluo River Basin, which occurred in the late Xia Dynasty (about 1809 BC) and was recorded in "Guoyu · Zhouyu". The cultivation of crops in arid areas is particularly important. In general, the fertilizer management of sorghum is as follows: the amount of fertilizer applied at one time should not be too large, combined with irrigation and fertilization in stages, fertilizer deep application, and water pressure fertilizer. If a large amount of fertilizer is applied at one time during drought, it is easy to wash away the applied fertilizer when encountering heavy rain after drought. This will not only cause economic losses to farmers, but also pollute the environment. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/30C05C9/00C05D9/00C05D9/02
Inventor 唐丽君王采艳彭宝林赵会媛韩朝应张伟
Owner GUIZHOU KAILIN GRP CO LTD
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