Release control urea and its preparing process

A technology of urea and large granular urea, which is applied in the fields of agricultural gas emission reduction, fertilizer mixtures, fertilization devices, etc., can solve the problems of loss, changes in the application effects of urease inhibitors and nitrification inhibitors, and reduction of urea hydrolysis and nitrification inhibition effects. , to achieve the effect of improving utilization, reducing possibility and reducing release

Inactive Publication Date: 2005-09-14
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

However, urease inhibitors and nitrification inhibitors are easy to degrade or fix in the soil, reducing or losing the inhibitory effects of urea hydrolysis and nitrification, and the application effects of urease inhibitors and nitrification inhibitors often change with the variation of soil environmental conditions

Method used

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  • Release control urea and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Coating and urease inhibitor combined type control effect urea (the fat core urea is the large granular urea with a particle size of 2.5 to 4.0mm)

[0019] Adopt fluidized bed spray coating method, dissolve 100 parts of acrylic resin RS100 used for coating in 1500 parts of ethanol solvent, wherein the amount of acrylic resin RS100 is 8% of the weight of the fertilizer core; then add 5 parts of urease to this solution to inhibit Agent hydroquinone, 10 parts of inorganic membrane conditioning agent talcum powder, then add 5 parts of plasticizer dimethyl phthalate of total weight of the solution, pour into fluidized bed liquid tank after miscibility, spray on fluidized large On the surface of granular urea, the operating parameters of the fluidized bed coating machine are: air inlet temperature 65°C, compressed air pressure 0.4Pa, nozzle atomization pressure 0.1Pa, after about 1 hour, milky white, smooth , Continuous and uniform coating.

[0020] Its result is: ...

Embodiment 2

[0023] Example 2 Coating and Nitrification Inhibitor Combination Type Controlled Effect Urea (Fat core urea is large granular urea with a particle size of 2.5-4.0mm)

[0024] Adopt fluidized bed spray coating method, 50 parts of acrylic resin RS100 and 50 parts of ethyl cellulose for coating are miscible in 1000 parts of ethanol solvent, wherein the sum of the miscible amount of acrylic resin RS100 and ethyl cellulose is fertilizer 10% of the core weight; then add 4 parts of nitrification inhibitor dicyandiamide to this solution, 5 parts of inorganic membrane conditioner zeolite powder, and then add 4 parts of plasticizer polyethylene glycol of the total weight of the solution, after miscible Pour it into a fluidized bed liquid tank and spray it on the surface of fluidized large particle urea. The operating parameters of the fluidized bed coating machine are: inlet air temperature 75°C, compressed air pressure 0.3Pa, nozzle atomization pressure 0.15Pa, approximately After 1 ho...

Embodiment 3

[0026] Example 3 Coating, urease inhibitor, and nitrification inhibitor combined effect-controlling urea (the fat core urea is large granular urea with a particle size of 2.5 to 4.0 mm)

[0027] Adopt fluidized bed spray coating method, 65 parts of acrylic resin RS100 and 35 parts of ethyl cellulose for coating are miscible in 1300 parts of ethanol solvent, wherein the total miscible amount of acrylic resin RS100 and ethyl cellulose is fertilizer 12% of core weight; add 1 part urease inhibitor N-butylthiophosphoric triamide, 3 parts nitrification inhibitor 3,4-dimethylpyrazole phosphate, 8 parts inorganic membrane conditioner to this solution Diatomaceous earth, then add plasticizer polyethylene glycol of 3 parts of total solution weights, pour into the fluidized bed liquid tank after miscible, spray on the surface of fluidized large particle urea, wherein the fluidized bed coating machine The operating parameters are: air inlet temperature 55°C, compressed air pressure 0.5Pa,...

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Abstract

This invention relates to controlled efficiency fertilizer, to be specific, it is a control efficiency carbamide and its preparation method. The control efficiency carbamide is made up of capsule layer and big particle carbamide fertilizer core. The layer is high molecular polymeric material that added urease inhibitor and / or nitrification inhibitor, the layer high molecular polymeric material is acrylic resin or compound of acrylic resin and ethyl cellulose. Fluidized bed spray painting is used on capsule technique, exactly the high molecular polymeric material; urease inhibitor and / or nitrification inhibitor are dissolved in ethanol solution. Inorganic membrane amendment and plasticizer are added to the solution, then big particle carbamide surface is sprayed coated to form smoothing, continuous, uniform capsule. This invention technique is easy to realize, and can allsided control the release and transformation of carbamide in soil, evaluate the carbamide nitrogen availability greatly.

Description

technical field [0001] The invention relates to an effect-controlling fertilizer, in particular to an effect-controlling urea combined with a coating and an inhibitor and a preparation method thereof. Background technique [0002] The utilization rate of traditional chemical fertilizers, especially nitrogen fertilizers, has been low due to losses such as volatilization, leaching and runoff, and the utilization rate of nitrogen fertilizers in the current season is only 30% to 40%. The utilization rate of nitrogen fertilizer is not high, not only the effect of increasing the yield and quality of crops is poor, but the economic benefit is low, and it will also cause atmospheric N 2 O and NO x Pollution, groundwater nitrate accumulation and water eutrophication are serious ecological and environmental problems. [0003] In order to improve the utilization rate of nitrogen fertilizer, the production of slow-release high-efficiency nitrogen fertilizer has become an important dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/90
CPCY02P60/21
Inventor 武志杰张海军陈利军
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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