Fertilization method capable of reducing nitrogen and phosphorus loss in paddy field and application thereof

A fertilization method and nitrogen and phosphorus technology are applied in the directions of fertilization method, application, fertilization device, etc., which can solve the problems of high cost, difficult to popularize in a large area, and reduce the nutrient concentration of paddy field surface water, so as to achieve low production cost and facilitate large-scale popularization. Application, effect of significant environmental benefits

Pending Publication Date: 2018-11-23
INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high cost and difficulty in large-scale promotion in the existing source pollution control method to prevent and control the loss of nitrogen and phosphorus in paddy fields, thereby providing a method for reducing the input of chemical nitrogen and phosphorus fertilizers in paddy fields and through chemical fertilizers. Substituting organic fertilizers with organic fertilizers to realize the gradual release of nitrogen and phosphorus nutrients to reduce the nutrient concentration of paddy field surface water; at the same time, through the substitution of organic fertilizers with chemical fertilizers, nitrogen in chemical fertilizers can be fixed in the soil, thereby reducing the loss of nitrogen and phosphorus in paddy fields from the source. Cost-effective fertilization method

Method used

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  • Fertilization method capable of reducing nitrogen and phosphorus loss in paddy field and application thereof
  • Fertilization method capable of reducing nitrogen and phosphorus loss in paddy field and application thereof
  • Fertilization method capable of reducing nitrogen and phosphorus loss in paddy field and application thereof

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Experimental program
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Effect test

Embodiment 1

[0024] This experiment was carried out at the experimental base of Jiangxi Academy of Agricultural Sciences in Gaoan City, and the return rate of milk vetch was 22500kg / hm 2 , N and P contents in milk vetch are calculated according to 0.267% and 0.133% of the mass of milk vetch, respectively. Determine the fertilization rate of the experimental base according to the recommended fertilization rate of local early rice, which are: pure nitrogen fertilizer 150kg / hm 2 , pure phosphate fertilizer 75kg / hm 2 , pure potash fertilizer 120kg / hm 2 , after using milk vetch to replace part of the chemical fertilizers, the amount of chemical fertilizers after the production reduction is: pure nitrogen fertilizer 90kg / hm 2 , pure phosphate fertilizer 45kg / hm 2 , pure potash fertilizer 120kg / hm 2 .

[0025] On March 25, the early rice seedlings were raised intensively, and on April 13, the milk vetch was overturned and returned to the field. On April 26, the early rice seedlings were tran...

Embodiment 2

[0032] This experiment was carried out at the experimental base of Jiangxi Academy of Agricultural Sciences in Gaoan City, and the return rate of milk vetch was 22500kg / hm 2 , N and P contents in milk vetch are calculated according to 0.35% and 0.2% of the mass of milk vetch, respectively. The average fertilization amount of the experimental base is determined according to the recommended fertilization amount of local early rice, which are: pure nitrogen fertilizer 150kg / hm 2 , pure phosphate fertilizer 75kg / hm 2 , pure potash fertilizer 120kg / hm 2 , after using milk vetch to replace part of the chemical fertilizers, the amount of chemical fertilizers after the production reduction is: pure nitrogen fertilizer 71.25kg / hm 2 , pure phosphate fertilizer 30kg / hm 2 , pure potash fertilizer 120kg / hm 2 .

[0033] On March 25, the early rice seedlings were raised intensively, and on April 13, the milk vetch was overturned and returned to the field. On April 26, the early rice see...

Embodiment 3

[0036] This experiment was carried out at the experimental base of Jiangxi Academy of Agricultural Sciences in Gaoan City, and the return rate of milk vetch was 22500kg / hm 2 , N and P contents in milk vetch are calculated according to 0.25% and 0.1% of the mass of milk vetch, respectively. The average fertilization amount of the experimental base is determined according to the recommended fertilization amount of local early rice, which are: pure nitrogen fertilizer 150kg / hm 2 , pure phosphate fertilizer 75kg / hm 2 , pure potash fertilizer 120kg / hm 2 , after using milk vetch to replace part of the chemical fertilizers, the amount of chemical fertilizers after the production reduction is: pure nitrogen fertilizer 93.8kg / hm 2 , pure phosphate fertilizer 52.5kg / hm 2 , pure potash fertilizer 120kg / hm 2 .

[0037] On March 25, the early rice seedlings were raised intensively, and on April 13, the milk vetch was overturned and returned to the field. On April 26, the early rice se...

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Abstract

The invention belongs to the technical field of agricultural environmental protection, and discloses a fertilization method capable of reducing nitrogen and phosphorus loss in a paddy field and application thereof. The fertilization method utilizes milk vetch returned to field to replace chemical fertilizers, and combines a specific fertilizer application manner, so that the nutrient release rateof nitrogen and phosphorus input in a paddy field is slowed down by organic replacement of chemical fertilizers while reducing input amount of chemical fertilizers, thereby further reducing nitrogen and phosphorus content in floodwater in a paddy field in a paddy growth period, to greatly reduce the risk of nitrogen and phosphorus loss in a paddy field from the source and decrease a series of environmental problems caused by the loss of nitrogen and phosphorus in a paddy fields, thereby giving significant environmental benefits. The fertilization method of combined application of organic and inorganic fertilizers adopted by the invention can also improve the nutrient utilization efficiency of chemical fertilizers to a greater limit and ensure grain yield, and has significant economic and ecological benefits. The fertilization method utilizes the organic resources grown in a paddy field to partially replace chemical fertilizers, without additional increase of labor and economic input, has high operability and low production cost in reality, and is convenient for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of agricultural environmental protection, and relates to a method for controlling agricultural non-point source pollution, and more specifically, to a low-cost, high-efficiency fertilization method capable of reducing the loss of nitrogen and phosphorus in paddy fields from the source and its application. Background technique [0002] Rice is the main grain crop in my country, with a planting area of ​​31 million hectares and a total output of 204.22 million tons, accounting for more than 1 / 3 of my country's total grain output. Among the various nutrients required for rice production, nitrogen is the most sensitive factor affecting rice production, development and yield, and is closely related to the absorption of phosphorus and potassium. Within a certain range of nitrogen application, increasing the level of nitrogen application can significantly increase rice yield, but beyond this range, increasing nitro...

Claims

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Application Information

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IPC IPC(8): A01C21/00A01G22/40
CPCA01C21/00A01C21/007A01G22/40
Inventor 陈静蕊庄艳华刘佳秦文婧徐昌旭吕丰娟
Owner INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI
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