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Synergistic slow release nitrogen fertilizer and preparation thereof

A slow-release nitrogen 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. The effect of promoting absorption

Active Publication Date: 2009-05-20
SINOCHEM AGRI LINYI R&D CENT CO LTD
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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 nitrogen fertilizer and preparation thereof
  • Synergistic slow release nitrogen fertilizer and preparation thereof
  • Synergistic slow release nitrogen fertilizer and preparation thereof

Examples

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Effect test

Embodiment 1

[0032]Using urea as a nitrogen source, a synergistic slow-release nitrogen fertilizer was prepared. The raw materials were: based on 100 parts of urea granules, 0.25 part of N-butylthiophosphoric triamide, 0.25 part of dicyandiamide, 0.05 part of PASP, 5 Parts of ethyl cellulose copolymer, 500ml of industrial ethanol solution; wherein the urea granules contain 46.3% nitrogen, the particle size is 0.5mm, and the molecular weight is: 40000, polyaspartic acid with structural formula such as formula 1.

[0033] Preparation:

[0034] 1) Preparation of suspension solution: dissolve 5 parts of ethyl cellulose copolymer into 500ml industrial ethanol solution, then mix 0.25 part of N-butylthiophosphoric triamide, 0.25 part of dicyandiamide and 0.05 part of PASP evenly After adding, the homogeneously stirred copolymer forms a mixed suspension solution, which is ready for use.

[0035] 2) Using the fluidized bed coating technology, the prepared mixed suspension solution is placed in the...

Embodiment 2

[0038] Using urea as a nitrogen source, prepare a synergistic slow-release nitrogen fertilizer. The raw materials are: based on 100 parts of urea granules, 0.1 part of thiophosphoric acid triamide, 0.05 part of 3,4-dimethylpyrazole phosphate, 1 part PASP, 6 parts of ethyl cellulose, and 500 ml of ether solution; wherein the urea granules contain 46.3% nitrogen, and the particle diameter is 1 mm.

[0039] Preparation:

[0040] 1) Preparation of suspension solution: Dissolve 6 parts of ethyl cellulose into 500ml ether solution, then mix 1 part of PASP with 0.1 part of phosphorothioate triamide and 0.05 part of 3,4-dimethylpyrazole phosphate Add and stir the homogeneous copolymer to form a mixed suspension solution, which is ready for use.

[0041] 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 fluidiza...

Embodiment 3

[0043] Using urea as a nitrogen source, prepare a synergistic slow-release nitrogen fertilizer. The raw materials are: based on 100 parts of urea granules, 100 parts of PASP, 5 parts of N-butylthiophosphoric triamide, 5 parts of 3,5-Di Methylpyrazole, 10 parts of ethyl cellulose, 1000ml of industrial ethanol solution; wherein the urea granules contain 46.3% nitrogen, the particle size is 2mm, the molecular weight is: 2000, and the polyaspartic acid with the structural formula as formula 2.

[0044] Preparation:

[0045] 1) Preparation of suspension solution: Dissolve 10 parts of ethyl cellulose into 1000ml industrial ethanol solution, then mix 100 parts of PASP with 5 parts of N-butylthiophosphoric triamide, 5 parts of 3,5-lutylpyridine After the azole is mixed evenly, add it, and the homogeneously stirred copolymer forms a mixed suspension solution, which is ready for use.

[0046] 2) The prepared mixed suspension solution is placed in the liquid irrigation, and 100 parts of...

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Abstract

The invention relates to a nitrogen fertilizer, in particular to a synergistic slow-releasing nitrogen fertilizer and a preparation method thereof. The fertilizer comprises: urea nitrogen fertilizer, biochemical inhibitors and a synergist, wherein, the weight portion ratio of the urea nitrogen fertilizer to the biochemical inhibitors to the synergist is equal to 1:0.001 to 0.1:0.0005 to 1; the biochemical inhibitors are a nitrification inhibitor and a urease inhibitor and the synergist is poly (aspartic acid), wherein, the weight portion ratio between the urease inhibitor and the nitrification inhibitor is equal to 0.5 to 2:0.5 to 2. 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 nitrogen fertilizer, in particular to a synergistic slow-release nitrogen fertilizer in urea state nitrogen fertilizer or a mixture of a synergist and a biochemical inhibitor coated on the surface of particles 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 ...

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
Owner SINOCHEM AGRI LINYI R&D CENT CO LTD
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