Synergistic slow release nitrogen fertilizer and preparation thereof

A slow-release nitrogen and fertilizer technology, which is applied in the field of green environmental protection type synergistic slow-release nitrogen fertilizer and its preparation, can solve the problems of reducing fertilizer nitrogen utilization rate, increasing ammonia volatilization, fertilizer nitrogen loss and the like, and improving fertilizer utilization rate. efficiency, reduction in fertilizer use, and improvement in phosphorus absorption

Active Publication Date: 2009-05-20
SHENYANG INST OF APPLIED 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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  • Synergistic slow release nitrogen fertilizer and preparation thereof
  • Synergistic slow release nitrogen fertilizer and preparation thereof
  • Synergistic slow release nitrogen fertilizer and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using urea as a nitrogen source, prepare a synergistic nitrogen fertilizer. The raw materials are: based on 100 parts of urea granules, 2 parts of DCD, 0.05 part of PASP, 5 parts of ethyl cellulose copolymer, and 500 ml of industrial ethanol solution; The polyaspartic acid containing 46.3% nitrogen, the particle size is 0.5 mm, the molecular weight is: 2000, and the structure formula is as formula 2.

[0032] Preparation:

[0033] 1) Preparation of suspension solution: Dissolve 5 parts of ethyl cellulose copolymer into 500ml of industrial ethanol solution, then mix 2 parts of DCD and 0.05 part of PASP evenly and then add, the mixed copolymer is composed of a mixed suspension solution, ready for use .

[0034] 2) Using the fluidized bed coating technology, the prepared mixed suspension solution is placed in the fluidized bed liquid tank, and at the same time, 100 parts of urea particles containing 46.3% nitrogen are injected into the spray tower from the fertilizer feed...

Embodiment 2

[0037] Use urea as nitrogen source to prepare synergistic nitrogen fertilizer. The raw materials are: based on 100 parts of urea granules, 0.5 parts of 3,4-dimethylpyrazole phosphate, 1 part of PASP, 6 parts of ethyl cellulose, and ether 500ml of solution; wherein the urea granules contain 46.3% nitrogen, the particle size is 1mm, the molecular weight is: 6000, and the structural formula is polyaspartic acid such as formula 2.

[0038] Preparation:

[0039] 1) Preparation of suspension solution: Dissolve 6 parts of ethyl cellulose into 500ml ether solution, then mix 1 part of PASP with 0.5 part of 3,4-dimethylpyrazole phosphate, add it, and stir to form a copolymer Mix the suspension solution and set aside.

[0040] 2) Place 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 into the spray tower from the fertilizer feed port for fluidization, and then follow the oper...

Embodiment 3

[0042] Use urea as nitrogen source to prepare synergistic nitrogen fertilizer, specifically: based on 100 parts of urea granules, 100 parts of PASP, 10 parts of 3,5-dimethylpyrazole, 10 parts of ethyl cellulose copolymer, industrial ethanol 1000ml of solution; wherein the urea granules contain 46.3% nitrogen, the particle size is 2mm, the molecular weight is: 100000, and the structure formula is polyaspartic acid such as formula 1.

[0043] Preparation:

[0044] 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 3,5-dimethylpyrazole and add, stir the copolymer evenly Compose a mixed suspension solution for use.

[0045] 2) The prepared mixed suspension solution is placed in the liquid irrigation, and 100 parts of urea particles containing 46.3% nitrogen are injected into the spray tower through the fertilizer feed port for fluidization, and then the suspen...

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Abstract

The invention relates to a synergistic fertilizer, in particular to a green and environmental protection synergistic slow-releasing nitrogen fertilizer which is mixed in ammonium nitrogen fertilizers or urea, and a preparation method thereof. The fertilizer constituents are as follows: nitrogen fertilizer, a biochemical inhibitor and a synergist, wherein, the weight portion ratio of the nitrogen fertilizer to the biochemical inhibitor to the synergist is equal to 1:0.005 to 0.1:0.0005 to 1; the biochemical inhibitor is a nitrification inhibitor, and the synergist is poly (aspartic acid). The preparation method is as follows: during the operation process of the nitrogen fertilizer, the biochemical inhibitor and the synergist are added into the fertilizer under the molten state of the fertilizer. The synergistic nitrogen fertilizer of the invention is suitable for various plants and soils. The fertilizer has notable disease-resistant, drought-resistant and lodging resistant effects on crops after being applied in soils, can effectively improve nutrients reserving power of soils and has certain effect on succession crops. Gain production can be increased by 8% to 30%, vegetable production can be increased by 14% to 60% and cash crop production can be increased by more than 30% by using the synergistic slow-releasing nitrogen fertilizer.

Description

technical field [0001] The invention relates to a synergistic fertilizer, in particular to a green and environment-friendly synergistic slow-release nitrogen fertilizer mixed with ammonium nitrogen fertilizer or urea and a preparation method thereof. Background technique [0002] Ordinary nitrogen fertilizers have a short fertilizer effect period, low nitrogen utilization rate, and do not improve the quality of agricultural products. The overall utilization rate of urea nitrogen is only 30-35%. Nitrogen leaching, volatilization, surface runoff and other losses are relatively large, and the economic benefits of fertilizer application are low, resulting in a huge waste of resources and an increase in agricultural production costs. Pollution of groundwater and soil non-point source causes greenhouse gas effect and eutrophication of water body, deteriorating the ecological environment. Extensive application of nitrogen fertilizer reduces the quality of agricultural products. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G3/90
CPCY02P60/21
Inventor 李东坡武志杰
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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