A method of reducing phosphorus loss in paddy fields by using Zhoucong organisms

A technique for surrounding clumps of organisms and paddy fields, applied in the fields of soil preparation methods, fertilization methods, applications, etc., can solve the problems of not being able to quickly reduce the concentration of phosphorus in field water, achieve good ecological and environmental benefits and economic benefits, promote growth, and improve utilization efficiency Effect

Active Publication Date: 2021-06-25
INST OF SOIL SCI CHINESE ACAD OF SCI
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AI Technical Summary

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 it mainly reduces phosphorus loss by promoting the absorption of phosphorus by rice, and cannot quickly reduce the phosphorus concentration of field water. There are certain limitations

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 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 fie...

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PUM

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Abstract

The invention relates to a method for reducing the loss of phosphorus in paddy fields by using the surrounding organisms. First, the TOC content of the paddy soil is increased to more than 3.0% by adding rice stalks, then performing rotary tillage and watering, and transplanting seedlings after standing for one day. After the rice seedlings turn green, Evenly spray the mixed solution of microalgae bio-fertilizer, plant auxin and water, the dosage of the mixed solution is 20-25kg / mu, regularly observe the growth of surrounding organisms in the rice planting area, and add the mixed solution according to the growth situation, After the rice is harvested, keep the lower straw and use a rotary tiller to perform rotary tillage for the next round of planting. The method of the present invention is simple to operate, easy to popularize in a large area, and has low cost, does not occupy additional cultivated land, and the phosphorus held by the periphyton can be returned to the soil in time, greatly reducing the amount of phosphorus application; the periphyton in the present invention can also return It has the ability to fix carbon and nitrogen, and increase soil organic matter content and fertility while reducing phosphorus loss.

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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Patent Type & Authority Patents(China)
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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