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Synergistic slow-release urea fertilizer and preparation method thereof

A slow-release urea and fertilizer technology, applied in the field of synergistic slow-release urea fertilizer and its preparation, can solve the problems of lower fertilizer nitrogen utilization rate, increase of soil pH value, easy leaching of nitrate nitrogen, etc., and improve the utilization rate , Simple preparation and operation, and the effect of promoting absorption

Active Publication Date: 2012-11-21
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After urea is applied to the soil, it is quickly converted into ammonium nitrogen under the action of urease in the soil. A large amount of ammonium nitrogen makes the soil pH value rise rapidly and ammonia volatilization increases; Under the action of nitrification, ammonium nitrogen is converted into nitrite nitrogen and nitrate nitrogen in a short period of time. Nitrate nitrogen is easily leached in the soil, and nitrite nitrogen will also be converted into nitrogen oxides. The form is gaseous loss, resulting in a large loss of fertilizer nitrogen, thereby reducing the utilization rate of fertilizer nitrogen

Method used

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  • Synergistic slow-release urea fertilizer and preparation method thereof
  • Synergistic slow-release urea fertilizer and preparation method thereof
  • Synergistic slow-release urea fertilizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Use urea as nitrogen source to prepare synergistic slow-release urea fertilizer. The raw materials are: based on 100 parts of urea granules, 0.25 parts of N-butylthiophosphoric triamide, 0.05 parts of PASP, and 5 parts of ethyl cellulose copolymer 1. Industrial ethanol solution 500ml; Wherein the urea granule contains 46.3% nitrogen, the particle diameter is 0.5mm, and the molecular weight is: 40000, the polyaspartic acid of structural formula such as formula 1.

[0034] Preparation:

[0035] 1) Preparation of suspension solution: Dissolve 5 parts of ethyl cellulose copolymer into 500ml of industrial ethanol solution, then mix 0.25 part of N-butylphosphorothioate and 0.05 part of PASP and add, stir well The copolymer forms a mixed suspension solution, which is ready for use.

[0036]2) Using fluidized bed coating technology, put the prepared mixed suspension solution in the fluidized bed tank, and at the same time inject 100 parts of urea particles containing 46.3% nit...

Embodiment 2

[0039] Using urea as a nitrogen source, prepare a synergistic slow-release urea fertilizer. The raw materials are: based on 100 parts of urea granules, 0.1 part of N-butylthiophosphoric triamide, 1 part of PASP, 6 parts of ethyl cellulose, and ether 500ml of solution; wherein the urea granules contain 46.3% nitrogen, the particle diameter is 1mm, the molecular weight is: 60000, and the polyaspartic acid with the structural formula as formula 1.

[0040] Preparation:

[0041] 1) Preparation of suspension solution: Dissolve 6 parts of ethyl cellulose copolymer into 500ml ether solution, then mix 1 part of PASP and 0.1 part of N-butylthiophosphoric triamide evenly and then add, stir the copolymer evenly Compose a mixed suspension solution for use.

[0042] 2) Put the prepared mixed suspension solution in the liquid tank of the fluidized bed, and at the same time inject 100 parts of urea particles containing 46.3% nitrogen from the fertilizer feed port into the spray tower for fl...

Embodiment 3

[0044] Use urea as nitrogen source to prepare synergistic slow-release urea fertilizer. The raw materials are: based on 100 parts of urea granules, 100 parts of PASP, 10 parts of N-butylthiophosphoric triamide, and 10 parts of ethyl cellulose copolymer 1000ml of industrial ethanol solution; wherein the urea granules contain 46.3% nitrogen, the particle diameter is 2mm, and the molecular weight is: 80000, polyaspartic acid with structural formula such as formula 1.

[0045] Preparation:

[0046] 1) Preparation of suspension solution: Dissolve 10 parts of ethyl cellulose copolymer into 1000ml of industrial ethanol solution, then mix 100 parts of PASP and 10 parts of N-butylthiophosphoric triamide, add them, and stir evenly for copolymerization substances to form a mixed suspension solution for use.

[0047] 2) Put the prepared mixed suspension solution in the liquid irrigation, and at the same time, inject 100 parts of urea particles containing 46.3% nitrogen from the fertilize...

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Abstract

The invention discloses nitrogen synergistic manure, in particular a synergistic slow-release urea fertilizer and a preparation method thereof. The fertilizer comprises the components of a urea nitrogen fertilizer, a biochemical inhibitor and a synergist, wherein the weight part ratio of the urea nitrogen fertilizer to the biochemical inhibitor to the synergist is 1:0.001-0.1:0.0005-1; the biochemical inhibitor is a urease inhibitor; and the synergist is aspartic acid. The preparation method comprises a step of adding the biochemical inhibitor and the synergist into the fertilizer in a fusion state in a nitrogen fertilizer operation flow. The synergistic urea fertilizer is suitable for various types of plants and soils, and has obvious disease-resistant, drought resistant and lodging resistant effects on crops after being applied to soil; the capability of storing nutrients of the soil can be effectively improved; and the fertilizer has a certain effect on after-reap crops. By using the synergistic slow-release urea fertilizer, the yield of grains can be increased by 8-30 percent, the yield of vegetables can be increased by 14-60 percent, and the yield of economic crops can be increased by over 30 percent.

Description

[0001] This application is a divisional application of the Chinese invention patent application. The application date of the original application: November 16, 2007, the application number: 200710158313.X, the name of the invention: synergistic slow-release urea fertilizer and its preparation method, the publication number: CN101434503A ; Since the examiner pointed out in the original application that the synergistic slow-release urea fertilizer involved does not belong to a general inventive concept, this divisional application is filed. technical field [0002] The invention relates to a nitrogen synergistic fertilizer, in particular to a synergistic slow-release urea fertilizer and a preparation method thereof. Background technique [0003] Ordinary urea fertilizer has a short fertilizer effect period, low fertilizer nitrogen utilization rate, and does not improve the quality of agricultural products. The overall utilization rate of urea nitrogen is only 30-35%. Nitrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 李东坡武志杰
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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