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Method for restoring cadmium contaminated soil by means of hybrid planting

A technology of cadmium-contaminated soil and mixed seeds, which is applied in the restoration of polluted soil and other directions, can solve the problems of increasing the Cd content and increasing the loofah fruit.

Inactive Publication Date: 2017-12-12
SICHUAN AGRI UNIV
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Problems solved by technology

Hei Liang (The effect of interplanting of Sedum sedum and corn on Zn polluted sludge [J]. Environmental Science, 2007, 28(4): 852-858.) found that the use of intercropping of Sedum sedum and superaccumulative plant For remediation of polluted sludge, the concentrations of Zn, Cd, and Cu in corn grains all meet the food hygiene standards, but the concentrations of Zn, Cd in Sedum sedum significantly increased
However, the research results of Wang Jingwen (The effect of intercropping of loofah and Sedum sedum on soil Cd form and Cd absorption of loofah [J]. Journal of Agricultural and Environmental Sciences, 2016, 35(12): 2292-2298.) showed that loofah and Intercropping with Sedum sedatus to a certain extent reduces the fruiting quantity of loofah, and at the same time, there is a risk of increasing the Cd content in the fruit of loofah

Method used

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  • Method for restoring cadmium contaminated soil by means of hybrid planting
  • Method for restoring cadmium contaminated soil by means of hybrid planting
  • Method for restoring cadmium contaminated soil by means of hybrid planting

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Embodiment 1

[0020] The soil used for the test was purple soil, which was taken from the farmland (29°59′N, 102°59′E) of Ya’an Campus, Sichuan Agricultural University. Effect of phosphorus and potassium absorption[J]. Chinese Journal of Ecological Agriculture, 2013,21(12):1565-1568.).

[0021] Seedlings of the cadmium-enriched plants P. chinensis, Chrysanthemum officinalis, and Curly sphaeroides were collected from the farmland of Ya'an Campus of Sichuan Agricultural University in March 2015, and the soil in the collection area was not polluted by heavy metals.

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Abstract

The invention belongs to the technical field of prevention and treatment of heavy metal contamination of soil, and provides a method for restoring cadmium contaminated soil by means of hybrid planting. According to the method, cerastium glomeratum, horseweed herb and cardamine hirsuta L. are subjected to hybrid planting in soil. According to the method for restoring the cadmium contaminated soil by means of hybrid planting, absorption of roots and plant overground parts of cerastium glomeratum, horseweed herb and cardamine hirsuta L. to cadmium can be improved simultaneously, and the restoration capability of cerastium glomeratum, horseweed herb and cardamine hirsuta L. to the cadmium contaminated soil can be improved.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal pollution prevention and control, and relates to the field of phytoremediation of heavy metal polluted soil, in particular to a method for remediating cadmium-contaminated soil by using mixed plant species. The invention can simultaneously enhance the absorption of cadmium by the root system and the aerial part of the plants of the curly ears, the small fly canopies and the broken rice chestnuts, and can improve the repairing ability of the curl ears, the small fly canopies and the broken rice chestnuts to the cadmium-contaminated soil. Background technique [0002] Cadmium is one of the most biologically toxic elements. It has strong chemical activity in the environment, high mobility, and long-lasting toxicity. It is a non-essential element for plant growth. When it reaches a certain concentration in the plant, it will cause toxic symptoms. [0003] Cerastium glomeratum (Cerastium glome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 夏惠梁东林立金廖明安王秀
Owner SICHUAN AGRI UNIV
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