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Method for efficiently preventing and controlling cadmium pollution in wheat-corn rotation system

A technology for cadmium pollution and wheat, applied in the field of environmental management, can solve the problems of low prevention and control efficiency, crop cadmium pollution, and high prevention and control costs, and achieve the effects of reducing prevention and control costs and reducing grain content.

Inactive Publication Date: 2021-06-11
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current research on cadmium pollution control technologies for wheat and corn, such as cadmium-contaminated soil remediation, selection of wheat and corn varieties with low cadmium accumulation, etc., mainly focus on the prevention and control of cadmium absorption in soil, while ignoring the impact of atmospheric dust on wheat. - The contribution of cadmium in corn grains, and no targeted prevention and control based on the key periods and key parts of cadmium absorption in crop roots, aboveground leaves, and spikes, resulting in frequent cadmium pollution in crops
At the same time, the existing prevention and control technologies and products are generally aimed at single crops such as wheat, rice, corn, etc., without considering the needs for the prevention and control of cadmium pollution in crops under the wheat-corn rotation system, resulting in repeated investment, high cost of prevention and control, and high prevention and control. Consequences of low control efficiency

Method used

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  • Method for efficiently preventing and controlling cadmium pollution in wheat-corn rotation system
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  • Method for efficiently preventing and controlling cadmium pollution in wheat-corn rotation system

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Experimental program
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Effect test

Embodiment 1

[0044] The present embodiment provides a method for preventing and controlling cadmium pollution in atmospheric dust in a wheat-corn rotation system, which specifically includes the following steps:

[0045] S1, first rotate wheat and corn:

[0046] The experiment was carried out in winter wheat-summer corn planting mode rotation from October to September of the next year; the wheat season experiment was carried out from October to June of the next year. The winter wheat was sown in October each year, and the variety was Aikang58 (Aikang58). Density 112.5kg·hm -2 , harvested in June of the following year;

[0047] The corn season experiment was carried out from June to September of the following year, and the corn was sown in June of the following year. The variety was: Xianyu 335 (Xianyu 335), and the planting density was 52,500 plants·hm -2 After harvesting in September of the following year, the straw will be mechanically returned to the field and mixed into the soil;

...

Embodiment 2

[0061] This embodiment provides a method for efficiently preventing and controlling cadmium pollution in a wheat-corn rotation system, which is basically the same as in Embodiment 1, except that:

[0062] In S2, after the wheat turns green in spring, the amount of fertilizer A applied is 9kg / mu;

[0063] Described fertilizer A is made up of the raw material of following mass percentage:

[0064] Calcium phosphate 6.5%, Fe 3 o 4 @C-NH 2 3.5%, manganese sulfate 0.5%, zinc sulfate 0.5%, magnesium sulfate 0.5%, the balance is urea;

[0065] In S3, at the seedling stage of corn after wheat harvest, the application rate of fertilizer A is 4.5kg / mu;

[0066] In S4, when fertilizer B is sprayed on the leaves, the amount of fertilizer B sprayed for wheat is 0.65 kg / mu each time, and corn is sprayed once every 13 days, and the amount of fertilizer B sprayed for each time is 0.9 kg / mu;

[0067] Described fertilizer B is made up of the raw material of following mass percentage:

[...

Embodiment 3

[0074] This embodiment provides a method for efficiently preventing and controlling cadmium pollution in a wheat-corn rotation system, which is basically the same as in Embodiment 1, except that:

[0075] In S2, after the wheat turns green in spring, the amount of fertilizer A applied is 8kg / mu;

[0076] Described fertilizer A is made up of the raw material of following mass percentage:

[0077] Calcium Phosphate 5.5%, Fe 3 o 4 @C-NH 2 2.5%, manganese sulfate 0.4%, zinc sulfate 0.4%, magnesium sulfate 0.4%, the balance is urea;

[0078] In S3, at the seedling stage of corn after wheat harvest, the application rate of fertilizer A is 4kg / mu;

[0079] In S4, when fertilizer B is sprayed on the leaves, the amount of fertilizer B sprayed for wheat is 0.5kg / mu each time, and corn is sprayed once every 10 days, and the amount of fertilizer B sprayed for each time is 0.8kg / mu;

[0080] Described fertilizer B is made up of the raw material of following mass percentage:

[0081]...

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Abstract

The invention relates to the field of environmental governance methods, and particularly discloses a method for efficiently preventing and controlling cadmium pollution in a wheat-corn rotation system. The method mainly comprises the following steps: applying a fertilizer A which is composed of urea, calcium phosphate, Fe3O4@C-NH2, manganese sulfate, zinc sulfate and magnesium sulfate after wheat reviving, applying the fertilizer A in a corn seedling stage after wheat harvesting, spraying a fertilizer B which is prepared from nano magnesium sulfate, humic acid, Fe3O4@C-NH2, alkyl naphthalene sulfonate and water onto leaf surfaces of the wheat and the corn in a wheat and corn elongation stage, and spraying a fertilizer C which is prepared from nano manganese sulfate, nano zinc sulfate, humic acid, Fe3O4@C-NH2, alkyl naphthalene sulfonate and water onto ears of the wheat and the corn after the grain filling stage of the wheat and the grain flowering stage of the corn. According to the method, roots are controlled and prevented from absorbing cadmium in soil in the seedling stage, leaves are controlled and prevented from absorbing cadmium in atmospheric dust fall in the elongation stage, the ears are controlled and prevented from absorbing cadmium in atmospheric dust fall in the grain filling stage of the wheat and the grain flowering stage of the corn, and the purposes of relay prevention and control in the growth stage, crop rotation system prevention and control and prevention and control cost reduction are achieved.

Description

technical field [0001] The invention relates to the field of environmental treatment methods, in particular to a method for efficiently preventing and controlling cadmium pollution in a wheat-corn rotation system. Background technique [0002] Cadmium is one of the most harmful metal elements. Once it enters crops, it will pass through the food chain and seriously endanger human health. With the development of industry, cadmium pollution in crops such as wheat and corn has become increasingly prominent. More and more studies have found that atmospheric cadmium deposition has become an important source of cadmium accumulation in field crops, especially in the suburbs of cities and around smelters and mines. Studies have shown that wheat and corn can not only absorb cadmium in the soil through their roots, but also directly absorb cadmium in atmospheric dust through their leaves and ears. At the same time, the leaves and ears of cereal crops can directly absorb cadmium from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/20A01B79/02A01C21/00C05G3/00C05G3/80C05G5/20C05G1/00
CPCA01B79/02A01C21/005A01G22/20C05B7/00C05D5/00C05D9/02C05G3/00C05G3/80C05G5/20C05C9/00C05F11/02
Inventor 马闯金凯刘福勇马永鹏张肖静赵继红张宏忠杨俊兴杜君胡华峰
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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