Method for restoring cadmium and lead polluted farmlands through enriched sunflower varieties

A sunflower and lead pollution technology, applied in the field of phytoremediation, can solve the problems of limiting the restoration efficiency and promotion value, affecting the quality of farmland soil environment, occupying farmland resources, etc., achieving restoration potential and broad application prospects, both economic value and ornamental value. Value, widely distributed effects

Active Publication Date: 2016-11-09
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

[0004] In phytoremediation technology, it is common to use hyperaccumulator plants to absorb cadmium and/or lead heavy metals in polluted soil. Minor problems limit its repair efficiency and promotion value
Moreover, hyperaccumulator plants usually need to grow in spring and summer

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  • Method for restoring cadmium and lead polluted farmlands through enriched sunflower varieties
  • Method for restoring cadmium and lead polluted farmlands through enriched sunflower varieties
  • Method for restoring cadmium and lead polluted farmlands through enriched sunflower varieties

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0018] Considering the technical problems described in the background technology section, it is necessary to screen a plant variety that grows fast, has a large biomass and has a certain economic value, and has a strong cadmium and / or lead enrichment ability to restore moderate and light cadmium and / or or lead-contaminated farmland soil, which is not only conducive to the remediation of cadmium and / or lead-contaminated soil, but also does not affect the rational use of polluted farmland resources.

[0019] The inventor noticed that sunflower, as one of the important oil crops in China, can be used for multiple crop rotation with food or other economic crops, and is widely planted in Northeast, Northwest and North China reg...

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Abstract

The invention provides a method for restoring cadmium and/or lead polluted farmlands through enriched sunflower varieties. The method includes the steps of sowing sunflowers into moderately or slightly cadmium and/or lead polluted soil, absorbing cadmium and/or lead in the polluted soil through root systems of the sunflowers and transferring the cadmium and/or lead to the over-ground part; and harvesting the sunflowers absorbing the cadmium and/or lead. After harvested, the sunflowers can be transported to a special site uniformly and receive innocent treatment. According to the method, the sunflowers can absorb and accumulate the cadmium and/or lead in the polluted farmland soil and transfer the cadmium and/or lead to the over-ground part according to the characteristics of high stress resistance, fast growth, large biomass and co-enrichment of the cadmium and/or lead of the sunflowers, and therefore the content of the cadmium and/or lead in the polluted soil can be lowered. The method is suitable for treating and restoring the moderately or slightly cadmium and/or lead polluted farmland soil. Because the stress resistance of the sunflowers is high and management of the sunflowers is extensive in the growth process, the cost is low, the operability is high, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal pollution in the environment, in particular to a method for remediating cadmium and / or lead polluted farmland by using enrichment sunflower varieties. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. The health of the soil environment is related to the quality of agricultural products and human health. In recent years, soil heavy metal pollution has become a serious environmental problem facing the world. At present, my country's farmland soil is seriously polluted by heavy metals. According to the results of the first national soil pollution survey, the rate of soil points exceeding the standard in my country's cultivated land is 19.4%, of which the proportions of slightly, lightly, moderately and heavily polluted points are 13.7%, 2.8%, 1.8% and 1.1%; and from the perspective ...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 杨俊兴雷梅陈同斌杨军郭俊娒万小铭顾松圃施娴
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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