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Method for preparing slow release coated urea with modified straws

A slow-release bag and rice straw technology, which is applied in the field of preparation of modified rice straw to prepare slow-release coated urea, can solve the problems of high production cost and poor field effect, and achieve improved distribution, reduced production cost, and good promotion The effect of reference

Inactive Publication Date: 2017-03-15
SHAANXI EYOUNG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to high production costs and poor field effects, its popularization and application are limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method for preparing slow-release coated urea from modified rice straw, comprising the following steps:

[0015] (1) First use scissors to cut the ordinary rice straw into small pieces of about 1 cm, put it in the oven for 3 hours, then crush it with a pulverizer, and then sieve the rice straw with a sieve with an aperture of 0.25, 0.15, and 0.75 mm Powder, put into bags for later use;

[0016] (2) Weigh a certain amount of the above-mentioned pretreated rice straw powder 1g, acetic anhydride AA1.5g, dimethylformamide DMF30mL, 4-dimethylaminopyridine 0.3g, and react 1- 6h, after the reaction is complete, take out the round bottom flask, rinse its outer wall with water, cool to room temperature, then use a suction filter bottle to filter, rinse with ethanol, after the rinse is complete, pour the reacted rice straw into a dry petri dish and Dry it in a constant temperature drying oven at 60°C for 8-10 hours and then seal it for storage;

[0017] (3) Using ...

Embodiment 2

[0021] A preparation method for preparing slow-release coated urea from modified rice straw, comprising the following steps:

[0022] (1) First use scissors to cut the ordinary rice straw into small pieces of about 1 cm, put it in the oven for 3 hours, then crush it with a pulverizer, and then sieve the rice straw with a sieve with an aperture of 0.25, 0.15, and 0.75 mm Powder, put into bags for later use;

[0023] (2) Weigh a certain amount of the above-mentioned pretreated rice straw powder 1g, acetic anhydride AA1.5g, dimethylformamide DMF30mL, 4-dimethylaminopyridine 0.3g, and react 1- 6h, after the reaction is complete, take out the round bottom flask, rinse its outer wall with water, cool to room temperature, then use a suction filter bottle to filter, rinse with ethanol, after the rinse is complete, pour the reacted rice straw into a dry petri dish and Dry it in a constant temperature drying oven at 60°C for 8-10 hours and then seal it for storage;

[0024] (3) Using ...

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PUM

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Abstract

The invention relates to a method for preparing slow release coated urea with modified straws. The method is characterized by including: firstly, cutting the normal straws into 1-centermeter small sections with scissors, placing the cut straws into an oven for 3 hours, pulverizing the cut straws with a pulverizer, then respectively sieving straw powder with sieves 0.25mm, 0.15mm and 0.75mm in bore diameter, and placing the straw powder into a bag for standby use. With the method, production cost of the slow release coated urea is reduced, soil structure can be improved by the straw coated materials, distribution of beneficial microorganisms is improved, and good promotion reference significance is achieved for comprehensive utilization of waste resources.

Description

technical field [0001] The invention relates to a preparation method for preparing slow-release coated urea from modified rice straw. Background technique [0002] my country is a big rice producing country, and the south is the main rice production area. With the increase of rice production. The output of rice straw is also increasing, with about 1900000000 rice straw produced every year. At present, the utilization rate of straw in my country is about 33%, which is mainly used for the production of straw returning to the field, feed and bioenergy. air pollution. It is easy to cause rural fires and affect the safe operation of highways and civil aviation. Therefore, it is necessary to explore ways to deal with crop residues that have potential economic benefits without polluting the environment. [0003] At the same time, my country is the world's largest producer and consumer of chemical fertilizers. Since the extensive use of common chemical fertilizers can easily dama...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05C9/00C05G3/00C05G3/80C05G5/12C05G5/30C05F11/00
Inventor 张俊
Owner SHAANXI EYOUNG TECH