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Rice low water permeability coated control release composite fertilizer and its producing method

A compound fertilizer, low water permeability technology, applied in water/sewage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can meet the problems of rice growth and can not meet the growth needs, and achieve the effect of extending the fertilizer supply time, improving the utilization rate of fertilizer, and reducing the cost of production equipment.

Inactive Publication Date: 2006-05-17
SHENYANG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used special fertilizers for rice cannot regulate the release and supply of nutrients in the fertilizer according to the nutrient requirements of different growth stages of rice, and cannot meet the growth needs of crops with one-time fertilization during the rice growth stage.
Relevant patents at home and abroad and special fertilizer varieties are mostly compound granulation, and the nutrient utilization rate of fertilizers is low, which cannot meet the growth of rice well. Play the role of prolonging the fertilizer effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 20kg of silicon powder, 5kg of polyvinyl alcohol, 5kg of cornstarch, 0.1kg of dicyandiamide powder, 0.01kg of copper sulfate powder, 0.01kg of zinc sulfate powder with 69.9kg of water, stir in a high-speed mixer for 30 minutes, and react The temperature is 90°C, the rotation speed of the mixer is 100r / min. The prepared coating solution is transferred to the storage tank connected with the air pump. Use the vibrating sieve to sieve and classify the rice special granule compound fertilizer, and produce granules of the same size one at a time; put 100kg of the sieved granule fertilizer into the disc granulator with heating function, and preheat it at 60°C , Rotate and plan the fertilizer surface for 10 minutes; the coating solution is sprayed on the fertilizer surface by the air pump every 3 minutes, the spraying time is 20 minutes, the weight of the spraying thickness is 5% of the total weight, and the packaging is cooled.

Embodiment 2

[0025] Embodiment 2: 20kg silicon powder, 10kg polyvinyl alcohol, 10kg cornstarch, 0.1kg dicyandiamide powder, 0.1kg hydroquinone, 0.01kg copper sulfate powder, 0.01kg zinc sulfate powder are mixed with 59.9kg water, Stir in a high-speed mixer for 40 minutes, the reaction temperature is 80° C., and the rotation speed of the mixer is 100 r / min. The prepared coating solution is transferred to the storage tank connected with the air pump. Use the vibrating sieve to sieve and classify the rice special granule compound fertilizer, and produce granules of the same size one at a time; put 100kg of the sieved granule fertilizer into the disc granulator with heating function, and preheat it at 60°C , Rotate and plan the fertilizer surface for 10 minutes; the coating solution is sprayed on the fertilizer surface by the air pump every 3 minutes, the spraying time is 20 minutes, the weight of the spraying thickness is 5% of the total weight, and the packaging is cooled.

Embodiment 3

[0026] Example 3: Mix 30kg silicon powder, 10kg polyvinyl alcohol, 10kg cornstarch, 0.1kg dicyandiamide powder, 0.01kg copper sulfate powder, 0.01kg zinc sulfate powder with 59.9kg water, and stir in a high-speed mixer 40 minutes, the reaction temperature is 90°C, and the rotation speed of the stirrer is 100r / min. The prepared coating solution is transferred to the storage tank connected with the air pump. Use the vibrating sieve to sieve and classify the rice special granule compound fertilizer, and produce granules of the same size one at a time; put 100kg of the sieved granule fertilizer into the disc granulator with heating function, and preheat it at 60°C , Rotate and plan the fertilizer surface for 10 minutes; the coating solution is sprayed on the fertilizer surface by the air pump every 3 minutes, the spraying time is 20 minutes, the weight of the spraying thickness is 5% of the total weight, and the packaging is cooled.

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Abstract

The production process of composite coated release-controlling rice fertilizer has the coating layer prepared with silicon powder of 300-400 mesh 20-30 wt%, PVA 5-10 wt%, corn starch 5-10 wt%, inhibitor 0.1-0.2 wt%, copper sulfate powder 0.01 wt%, zinc sulfate powder 0.01 wt% and water 49.9-69.9 wt%. The present invention prepares the low water permeability coating with the nutritive elements essential for rice, nitrogen synergist and environment friendly biodegradable adhesive, to realize the controllable release of azophoska in low production cost.

Description

technical field [0001] The invention relates to the field of preparation of a special fertilizer for rice, in particular to a rice low-permeability coated controlled-release compound fertilizer and a preparation method thereof. Background technique [0002] Rice plays an important strategic role in China's grain production, and more than half of China's population takes rice as a staple food. According to statistics, the area of ​​rice in China accounts for about 29.1% of the total area of ​​grain crops. The yield per unit area is 68% higher than that of grain crops on average, and the total yield accounts for 44% of the total grain output in the country. Reasonable fertilization of rice is an important measure to ensure stable and high yield of rice. [0003] Rice fertilization is divided into tiller fertilizer, ear fertilizer, and grain fertilizer, and the yield and topdressing have a vital relationship. Due to the special aquatic environment of rice and the fertilizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F3/00
Inventor 韩晓日王忠强王岩宋正国战秀梅刘小虎孙振涛杨劲峰
Owner SHENYANG AGRI UNIV