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Slow release, long-acting urea manure and technique of manufacturing the same

A urea and fertilizer technology, applied in the field of nitrogen fertilizers, can solve the problems of reducing fertilizer nitrogen utilization rate, increasing soil pH value, easy leaching of nitrate nitrogen, etc., and achieving improved utilization rate, simple operation, and labor-saving agricultural production. Effect

Inactive Publication Date: 2008-01-23
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 will cause the soil pH to rise rapidly and ammonia volatilization to increase; 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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  • Slow release, long-acting urea manure and technique of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The raw materials for preparing slow-release urea are: based on 100 parts of urea granules, 0.0625 parts of N-butylphosphorothioate, 2 parts of DCD, 5 parts of acrylic resin and ethyl cellulose copolymer, and 500 ml of industrial ethanol solution; The urea granules contain 46.3% nitrogen, have a particle size of 0.5 mm, and have a weight ratio of acrylic resin to ethyl cellulose of 1:0.1.

[0026] Preparation:

[0027] 1) Preparation of suspension solution: Dissolve 5 parts of copolymer of acrylic resin and ethyl cellulose into 500ml of industrial ethanol solution, then mix 0.0625 parts of N-butylthiophosphoric triamide and 2 parts of DCD evenly before adding, The homogeneously stirred copolymer forms a mixed suspension solution, which is ready for use.

[0028] 2) Utilize the fluidized bed coating technique (see Fig. 1), place the prepared mixed suspension solution in the liquid tank 10, and simultaneously inject 100 parts of urea particles containing 46.3% nitrogen i...

Embodiment 2

[0030] The raw materials for preparing slow-release urea are: based on 100 parts of urea granules, 1 part of N-butyl phosphoric acid triamide, 0.5 part of DCD, 6 parts of acrylic resin and ethyl cellulose copolymer, and 500 ml of ether solution; wherein the urea granules contain Nitrogen 46.3%, particle size 1mm, weight ratio of acrylic resin and ethyl cellulose 1:0.15.

[0031] Preparation:

[0032] 1) Preparation of suspension solution: Dissolve 6 parts of acrylic resin and ethyl cellulose copolymer into 500ml ether solution, then mix 1 part of N-butyl phosphate triamide and 0.5 part of DCD evenly, then add, and stir the copolymer evenly Compose a mixed suspension solution for use.

[0033] 2) The prepared mixed suspension solution is placed in the liquid irrigation 10, and 100 parts of urea particles containing 46.3% nitrogen are injected into the spray tower 1 from the fertilizer feed port 2 for fluidization, and then follow the operation of the fluidized bed The suspens...

Embodiment 3

[0035] The raw materials for preparing slow-release urea are: based on 100 parts of urea granules, 1 part of N-methylpyrrolidone, 2 parts of DCD, 10 parts of acrylic resin and ethyl cellulose copolymer, and 1000 ml of industrial ethanol solution; wherein the urea granules contain nitrogen 46.1%, the particle size is 2mm, and the weight and number ratio of acrylic resin and ethyl cellulose is 1:0.3.

[0036] Preparation:

[0037] 1) Preparation of suspension solution: Dissolve 10 parts of acrylic resin and ethyl cellulose copolymer into 1000ml of industrial ethanol solution, then mix 1 part of N-methylpyrrolidone and 2 parts of DCD evenly, then add, and stir the copolymer to form Mix the suspension solution and set aside.

[0038] 2) The prepared mixed suspension solution is placed in the liquid irrigation 10, and 100 parts of urea particles containing 46.1% nitrogen are injected into the spray tower 1 from the fertilizer feed port 2 for fluidization, and then follow the opera...

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Abstract

The invention relates to the nitrogen manure, in particular to the slow-release and long-effect urea fertilizer coating a layer of biochemical inhibitor on the urea surface and the preparation process. The fertilizer components are the urea, the biochemical inhibitor, the bond and the organic solvent. The process is that: the levitated solution mixed with the biochemical inhibitor, the bond and the organic solvent is sprayed and coated on the surface of the molding urea granule under the fluidized state through a fluidized bed to gain the slow-release urea fertilizer. The fertilizer of the invention makes full play of the functions and effects of two biochemical inhibitors, makes the fertilizer effect period prolonged obviously and realizes that once basal nitrogen fertilizer application can meet the requirement of whole growing seasons on the nitrogen. The agricultural production saves labor and time with low production cost and friendly environment. For the secondary processing of the urea, the preparation process of the invention has simple operation and easy realization and can carry out industrial production on a large scale.

Description

technical field [0001] The invention relates to a nitrogen fertilizer, in particular to a slow-release and long-acting urea fertilizer coated with biochemical inhibitors on the surface of urea and a preparation process thereof. Background technique [0002] Ordinary nitrogen fertilizer has a short fertilizer effect period, low fertilizer nitrogen utilization rate, the overall utilization rate of urea nitrogen is only 30-35%, nitrogen leaching loss, volatilization, surface runoff and other losses are more, and the economic benefit of fertilizer application is low , resulting in a huge waste of resources and an increase in agricultural production costs. At the same time, groundwater and soil non-point source pollution will be generated, causing greenhouse gas effects and eutrophication of water bodies, and deteriorating the ecological environment. In order to alleviate and solve these problems, while strengthening and improving the technical management of agricultural product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05C9/00C05G3/90
CPCY02P60/21
Inventor 李东坡武志杰陈利军
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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