Method for reducing phosphorus loss of paddy field by using periphyton

A technology for surrounding organisms and paddy fields, applied in fertilization methods, land preparation methods, applications, etc., can solve problems such as the inability to rapidly reduce the phosphorus concentration in field water, achieve good ecological and environmental benefits and economic benefits, improve retention rates, and improve soil organic matter. input effect

Active Publication Date: 2019-09-10
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The use of organic fertilizers in rice fields is also an effective method for reducing phosphorus runoff loss. For example, CN108440049A discloses a rice organic fertilizer, but

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for reducing the loss of phosphorus in paddy fields by using Zhoucong organisms, comprising the steps of:

[0025] (1) Select 1 mu of paddy field, and divide it into 5 meters * 5 meters of fields, collect paddy field surface layer (0-5cm) soil samples to measure paddy soil total organic carbon (TOC) content, be 2.7%, press 200kg / mu Add rice straw in a large amount to make the TOC content of the paddy soil reach more than 3.0%, and then apply nitrogen, phosphorus and potassium fertilizers, in which the nitrogen fertilizer application rate is 180kg N / ha, the phosphorus fertilizer application rate is 60kg P / ha, and the potassium fertilizer application rate is 75kg K / ha. The rotary tiller performs rotary tillage on the rice planting area. The depth of the rotary tillage is 8cm. After the rotary tillage, the irrigation depth is 3cm. After the irrigation, it is left to stand for 1 day;

[0026] (2) Transplant rice seedlings in the rice planting area, and keep the fie...

Embodiment 2

[0036] A method for reducing the loss of phosphorus in paddy fields by using Zhoucong organisms, comprising the steps of:

[0037] (1) Select 1 mu of rice field, and divide it into 5 meters * 5 meters of fields, collect rice field surface (0-5cm) soil samples to measure the total organic carbon (TOC) content of paddy soil, it is 2.7%, press 200kg / mu Add rice straw in a large amount to make the TOC content of the paddy soil reach more than 3.0%, and then apply nitrogen, phosphorus and potassium fertilizers, in which the nitrogen fertilizer application rate is 150kg N / ha, the phosphorus fertilizer application rate is 50kg P / ha, and the potassium fertilizer application rate is 60kg K / ha. The rotary tiller performs rotary tillage on the rice planting area. The depth of the rotary tillage is 12cm. After the rotary tillage, the irrigation depth is 4cm. After the irrigation, it is left to stand for 1 day;

[0038] (2) Transplant rice seedlings in the rice planting area, and keep the ...

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PUM

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Abstract

The invention relates to a method for reducing phosphorus loss of a paddy field by utilizing periphyton. The method comprises the following steps: enabling the TOC content of paddy soil to be 3.0% orabove by adding rice straw; then performing rotary tillage and watering, standing for one day, and then transplanting seedlings; uniformly spraying a mixed solution of a microalgae biological fertilizer, auxin and water after the rice seedlings turn green, wherein the amount of the mixed solution is 20-25 kg/mu; observing the growth of the periphyton in a rice planting area regularly; supplementing the mixed solution according to the growth condition; after the rice is harvested, remaining straws on the lower portion; performing rotary tillage by using a rotary cultivator; and carrying out thenext round of planting. The method disclosed by the invention is simple to operate, easy to popularize in a large area, low in cost, free of extra occupation of cultivated land, capable of returningphosphorus immobilized by periphyton to soil in time, and capable of greatly reducing the application amount of phosphorus; and the periphyton provided by the invention also has carbon fixation and nitrogen fixation capabilities, and the organic matter content and the fertility of the soil are increased while the phosphorus loss is reduced.

Description

technical field [0001] The invention relates to a method for using surrounding organisms to hold paddy field phosphorus in situ and reduce paddy field phosphorus loss with runoff, and belongs to the technical field of agriculture and environmental protection. Background technique [0002] Agricultural non-point source pollution has been the main source of pollution in my country's "three rivers and three lakes" for many years, and it is also the main contributor to rural surface water pollution, seriously threatening the safety of drinking water for the people of the country. According to the Bulletin of the First National Survey of Pollution Sources, the discharge of total phosphorus from agricultural pollution sources accounted for 67.4% of the total pollution load of surface water bodies. Among agricultural pollution sources, the total phosphorus discharged from farmland accounts for more than 30%, and shows an increasing trend. Monitoring shows that the seasonal utiliza...

Claims

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Application Information

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IPC IPC(8): A01G22/22A01B79/02A01C21/00
CPCA01B79/02A01C21/005A01G22/22
Inventor 刘俊琢吴永红孙朋飞
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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