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Blending controlled release urea BB fertilizer

A controlled-release urea and fertilizer technology, applied in urea compound fertilizers, fertilizer mixtures, nitrogen fertilizers, etc., can solve problems such as nitrite and ammonia poisoning, increased soil alkalinity, and loss of gaseous nitrogen, so as to improve fertilizer utilization and production The effect of simple process and high utilization rate

Inactive Publication Date: 2009-07-22
辽宁省农业科学院环境资源与农村能源研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Urea has some problems in fertilization that need to be solved urgently. Due to the presence of urease and nitrate reductase in the soil, when urea is applied, it will quickly transform into nitrate nitrogen and ammonia nitrogen, which cannot be fully absorbed and utilized by crops, which will cause soil alkalinity. The increase and the poisoning of nitrite and ammonia will also cause the loss of gaseous nitrogen, causing the utilization rate of urea fertilizer to be around 40%.
For this reason, people began to study coated urea, sulfur-coated urea, urea derivatives, slow-release urea, etc., but there were many problems, because the fertilizers needed by crops during growth and development were not the same, as mentioned above The release rate of urea cannot be completely consistent with the fertilizer requirement of the crop

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A blended controlled-release urea BB fertilizer, which is made by blending three urea components A, B, and C, in which component A is ordinary urea, and components B and C are urea granulated and added with urea-formaldehyde resin Adhesive is carried out the coated urea of ​​coating, the weight of urea-formaldehyde resin is 2% of urea weight in component B; The weight of urea-formaldehyde resin is 6% of urea weight in component C; The weight ratio between A, component B and component C is blended in a ratio of 1:2:5 to make a blended controlled-release urea BB fertilizer;

[0014] Take 20 kg of the above blended controlled-release urea BB fertilizer and add it to 10 kg of diammonium phosphate and 10 kg of potassium chloride, mix evenly and apply it to 1 mu of cornfield, and apply 10 kg of diammonium phosphate, potassium chloride After 10 kg, add 30 kg of urea. The corn yield of the product of the invention is 612.4 kg, which is 10.48% higher than that of the control an...

Embodiment 2

[0016] A blended controlled-release urea BB fertilizer, which is made by blending three urea components A, B, and C, in which component A is ordinary urea, and components B and C are urea granulated and added with urea-formaldehyde resin Adhesive is carried out the coating urea of ​​coating, the weight of urea-formaldehyde resin is 3.5% of urea weight in the component B; The weight of urea-formaldehyde resin is 8% of urea weight in the component C; A, component B and component C are blended in a ratio of 1.5: 2.5: 5.5 by weight to make a blended controlled-release urea BB fertilizer;

[0017] Take 20 kg of the above blended controlled-release urea BB fertilizer and add it to 10 kg of diammonium phosphate and 10 kg of potassium chloride and apply it to 1 mu of cornfield. After applying 10 kg of diammonium phosphate and 10 kg of potassium chloride Then apply 30 kg of urea. The corn yield of the product of the invention is 632.7 kg, which is 14.14% higher than that of the contro...

Embodiment 3

[0019] A blended controlled-release urea BB fertilizer, which is made by blending three urea components A, B, and C, in which component A is ordinary urea, and components B and C are urea granulated and added with urea-formaldehyde resin Adhesive is carried out the coated urea of ​​coating, the weight of urea-formaldehyde resin is 5% of urea weight in component B; The weight of urea-formaldehyde resin is 10% of urea weight in component C; A, component B and component C are blended in a weight ratio of 2:3:6 to make a blended controlled-release urea BB fertilizer.

[0020] Take 20 kg of the above blended controlled-release urea BB fertilizer and add it to 10 kg of diammonium phosphate and 10 kg of potassium chloride and apply it to 1 mu of cornfield. After applying 10 kg of diammonium phosphate and 10 kg of potassium chloride Then apply 30 kg of urea. The corn yield of the product of the invention is 620.3 kg, which is 11.91% higher than that of the control and saves fertilize...

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Abstract

The invention relates to a controlled-release urea BB fertilizer, specifically a blended long-acting urea fertilizer, which is formed by blending three urea components A, B, and C, wherein component A is common urea, and component B And component C is the coated urea that adds urea-formaldehyde resin binder to coat after urea granulation, the weight of urea-formaldehyde resin in component B is 2-5% of urea weight; The weight of urea-formaldehyde resin in component C is urea 6-10% by weight; the weight ratio among component A, component B and component C is 1-2:2-3:5-6. The invention has the advantages of good application effect, high utilization rate of urea fertilizer and simple production process.

Description

technical field [0001] The invention relates to a urea slow-release fertilizer, in particular to a blended controlled-release urea BB fertilizer. Background technique [0002] Urea fertilizer has become an indispensable solid nitrogen fertilizer in agriculture. It is widely used in agriculture and cannot be replaced by other fertilizers. It occupies the first place in the amount of solid nitrogen fertilizer, and the annual amount is still increasing sharply. Urea is mainly used in crops. base fertilization. Urea has some problems in fertilization that need to be solved urgently. Due to the presence of urease and nitrate reductase in the soil, when urea is applied, it will quickly transform into nitrate nitrogen and ammonia nitrogen, which cannot be fully absorbed and utilized by crops, which will cause soil alkalinity. Increase and the poisoning of nitrite and ammonia will also cause the loss of gaseous nitrogen, resulting in a urea fertilizer utilization rate of about 40%....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05C9/00C05C9/02C05G1/00
Inventor 安景文解占军牛世伟
Owner 辽宁省农业科学院环境资源与农村能源研究所
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