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Synergistic slow release urea fertilizer and preparation thereof

A slow-release urea and fertilizer technology, applied in the field of synergistic slow-release urea fertilizer and preparation, can solve the problems of reducing fertilizer nitrogen utilization rate, increasing soil pH value, easy leaching of nitrate nitrogen, etc., and achieving trace element absorption rate Improve, prolong fertilizer effect period, promote the effect of absorption

Inactive 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 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 thereof
  • Synergistic slow release urea fertilizer and preparation thereof
  • Synergistic slow release urea fertilizer and preparation thereof

Examples

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Effect test

Embodiment 1

[0033] Using urea as a nitrogen source, prepare a synergistic slow-release urea fertilizer. The raw materials are: based on 100 parts of urea granules, 0.25 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 evenly and add, stir well The copolymer forms a mixed suspension solution, which is ready for use.

[0036] 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 particl...

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 into 500ml of ether solution, then mix 1 part of PASP and 0.1 part of N-butylthiophosphoric triamide, add it, and stir the copolymer to form a mixed Suspended solution, ready to use.

[0042] 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...

Embodiment 3

[0044] Using urea as a nitrogen source, prepare a 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 and add, stir evenly for copolymerization substances to form a mixed suspension solution for use.

[0047] 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 throu...

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Abstract

The invention relates to a nitrogen synergistic fertilizer, in particular to a synergistic slow-releasing urea fertilizers and a preparation method thereof. The fertilizer constituents are as follows: urea nitrogen fertilizer, a biochemical inhibitor and a synergist, wherein, the weight portion ratio of the urea nitrogen fertilizer to the biochemical inhibitor to the synergist is equal to 1:0.001 to 0.1:0.0005 to 1; the biochemical inhibitor is a urease 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 urea 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 urea fertilizer.

Description

technical field [0001] The invention relates to a nitrogen synergistic fertilizer, in particular to a synergistic slow-release urea fertilizer and a preparation method thereof. Background technique [0002] 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 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 urea degrades the quality of agricultural products. In order to alleviate and solve these problems, while improving the technical mana...

Claims

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Application Information

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