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A method for degrading acetochlor in farmland soil

A technology of acetochlor and soil, which is applied in the field of degrading acetochlor in farmland soil, can solve the problems of long degradation cycle, high cost and difficult operation, and achieve the effect of long-lasting degradation, low cost and simple process

Active Publication Date: 2021-09-03
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The methods used in the above patents have one or more disadvantages such as difficult operation, high cost, and long degradation cycle.

Method used

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  • A method for degrading acetochlor in farmland soil

Examples

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example 1

[0015] Example 1: Degradation of acetochlor in corn field soil

[0016] like figure 1 As shown, the organic fertilizer prepared by mixed aerobic fermentation of deer dung, straw, biochar and zeolite is used as the degradation material of acetochlor in the soil and is fully mixed with the soil of the corn field. The soil mixing depth is 350mm; the surface is covered with PE film. Carried out in May, the soil temperature is higher than 15°C; the amount of fertilizer applied is 0.65kg / m 2 , the soil was watered and humidified after fertilization, the initial moisture content of the soil was 35-40%, and crops were sown on the 6th day after fertilization.

[0017] The organic fertilizer preparation adopts the mixing ratio of deer dung and straw of 1:0.35~1:0.55 (weight ratio), the carbon-nitrogen ratio of straw is 25~30, and the length of crushed straw is less than 20mm; the amount of biochar added is deer dung and The mass of the straw mixture is 12%, and the amount of zeolite a...

example 2

[0019] Example 2: Degradation of acetochlor in sunflower soil

[0020] like figure 1 As shown, the organic fertilizer prepared by mixed aerobic fermentation of deer dung, straw, biochar and zeolite is used as the degradation material of acetochlor in the soil and mixed with the sunflower field soil, the depth is controlled at 300mm, and the content of acetochlor is 20-76mg / kg, the amount of organic fertilizer added is 1.2kg / m 2 After fertilization, the soil was watered and humidified. The initial moisture content of the soil was 38-41%. It was implemented in June. After the organic fertilizer was added to the soil and mixed thoroughly, the surface was covered with PE film, and the soil temperature was higher than 15°C. After the organic fertilizer and the soil are fully mixed, the crops are sown on the 7th day.

[0021] The organic fertilizer preparation adopts the mixing ratio of deer manure and straw at 1:0.45~1:0.55 (weight ratio), the length of the crushed straw is less...

example 3

[0023] Example 3: Degradation of acetochlor in potato soil

[0024] like figure 1 As shown, the organic fertilizer prepared by mixed aerobic fermentation of deer dung, straw, biochar and zeolite is used as the degradation material of acetochlor in the soil and is fully mixed with the potato planting soil, the mixing depth is controlled at 400mm, and the amount of organic fertilizer added is 0.5 kg / m 2 After fertilization, the soil was watered and humidified, and the initial moisture content of the soil was 40-45%; after the organic fertilizer was added to the soil and mixed thoroughly, the surface was covered with PE film, and the soil temperature was higher than 15°C in the organic fertilizer and soil After mixing well, the potatoes were sown on the 6th day.

[0025] The organic fertilizer is prepared by using the mixing ratio of deer dung and straw as 1:0.43 to 1:0.65 (weight ratio), the length of the crushed straw is less than 20mm, and the carbon-nitrogen ratio of the st...

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Abstract

The invention discloses a method for degrading acetochlor in farmland soil. The organic fertilizer is prepared by mixed aerobic fermentation of deer dung, straw, biochar and zeolite as the degradation material of acetochlor in farmland soil and fully mixed with the farmland soil. The depth is controlled at 300-500mm; the initial moisture content of the soil is controlled between 35-45%, and the temperature during the degradation of acetochlor in the soil is not lower than 15°C; after the organic fertilizer is added to the soil and fully mixed, the surface Cover with PE film, and remove the PE film when the acetochlor in the soil is degraded by more than 95%. The sowing of the crops was carried out 5 days after the organic manure and the soil were fully mixed. The method effectively uses the organic fertilizer as the degradation material of acetochlor, realizes soil fertilization and acetochlor degradation at the same time, and effectively avoids the negative impact on the environment of the chemical method and the problem of single function of the traditional biological method. The method has the advantages of simple process, low cost and high popularization and application value.

Description

technical field [0001] The invention relates to the technical field of herbicide degradation in environmental engineering, in particular to a method for degrading acetochlor in farmland soil. Background technique [0002] my country is rich in land resources, but the per capita possession is insufficient. Acetochlor is used as the main herbicide for weeding crops. Since acetochlor is a stable substance, it is not easy to volatilize and photolyze. It is a pre-emergence selective amide herbicide After being used in the soil, it is difficult to degrade and form more accumulation, which eventually exceeds the self-purification capacity of the soil, resulting in a large amount of residues in the soil. In addition, acetochlor will still affect the natural environment after migration and transformation in the environment. Through migration in the environment, it will also threaten the health of aquatic organisms, destroy aquatic ecosystems, and enter the human body through diet, dri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10C05G1/00C09K17/00
CPCB09C1/10C05D9/00C05F3/00C05F11/00C05F17/00
Inventor 徐建玲王汉席刘学军冯佳音
Owner NORTHEAST NORMAL UNIVERSITY
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