Method for strengthening Grain amaranth to restore cadmium-polluted cultivated land

A technology of amaranth seeds and cadmium pollution is applied in the restoration of polluted soil and other directions to achieve the effects of improving enrichment capacity, easy planting management, and reducing cadmium concentration.

Inactive Publication Date: 2020-07-03
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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Problems solved by technology

[0006] For the deficiencies in the existing cadmium-contaminated cultivated land phytoremediation technology, the purpose of the present invention is to provide a method for strengthening grain amaranth to repair cadmium-contaminated cultivated land, using NTA (nitrilotriacetic acid) as a chelating agent, which can promote the activation of cadmium in cultivated land soil, Improve its bioavailability, improve the ability of grain amaranth to enrich cadmium in cultivated soil, and NTA is easy to be biodegraded, and will not cause secondary pollution to the environment. It is a green, economical, efficient and environmentally friendly cadmium-polluted cultivated land Repair method

Method used

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  • Method for strengthening Grain amaranth to restore cadmium-polluted cultivated land

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Embodiment 1

[0022] The experiment site is in Paitou Township, Xiangtan County, Xiangtan City, Hunan Town.

[0023] The invention provides a method for strengthening the high-enrichment plant-grain amaranthus to restore cadmium-contaminated cultivated land, and the specific steps are as follows:

[0024] (1) Select the cultivated land without cadmium pollution as the grain amaranth nursery base; sow the grain amaranth seeds, and the grain amaranth variety is American grain amaranth K472;

[0025] (2) Before transplanting, the cadmium-polluted test plot is finely and evenly formed, and the nitrogen-phosphorus-potassium compound fertilizer of 80kg / mu is used as the base fertilizer, and the total nutrient (N+P 2 o 5 +K 2 O) ≥ 46%; the basic physical and chemical properties of the test plot soil are shown in Table 1;

[0026] Table 1 Basic physical and chemical properties of the soil in the test plot

[0027]

[0028] (3) Grain amaranth takes root and germinates, strengthens field manag...

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Abstract

The invention discloses a method for strengthening Grain amaranth to restore cadmium-polluted cultivated land. Grain amaranth is transplanted into the cadmium-polluted cultivated land soil, 10-40 kg / mu of a degradable chelating agent NTA is applied to the cadmium-polluted cultivated land soil 10-20 days before Grain amaranth is harvested to improve the effectiveness of cadmium in the cultivated land soil and promote absorption of the Grain amaranth to cadmium in the cultivated land soil, and Grain amaranth is harvested 95 days after Grain amaranth is planted. NTA (nitrilotriacetic acid) is used as the chelating agent, so activation of cadmium in the cultivated land soil can be promoted, the bioavailability of cadmium can be improved, and the enrichment capacity of Grain amaranth for cadmium in the cultivated land soil can be improved; and the NTA is easy to biodegrade, so secondary pollution to the environment is avoided, and the method is a green, economical, efficient and environment-friendly cadmium-polluted cultivated land remediation method.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal-contaminated soil, and relates to a method for intensifying the remediation of cadmium-contaminated cultivated land by a high-enrichment plant-grain amaranth. Background technique [0002] The 2014 "National Soil Pollution Survey Bulletin" shows that the overall national soil environment is not optimistic. Some areas have serious soil pollution, the soil environment quality of cultivated land is worrying, and the soil environment problems of industrial and mining wasteland are prominent. Man-made activities such as industry, mining, agriculture, and high background values ​​of the soil environment are the main reasons for soil pollution or exceeding the standard. The rate of soil points exceeding the standard in cultivated land is 19.4%, and the main pollutants are cadmium, nickel, copper, arsenic, mercury, lead, and DDT. Wait. [0003] Cadmium in cultivated soil has the charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 权胜祥史学峰刘能斌朱维葛燚刘晓月
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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