Method for repairing farmland soil polluted by cadmium through using combination of arbuscular mycorrhizal fungi and sedum plumbizincicola

A technology of arbuscular mycorrhizal fungi and sedum associated ore is applied in the field of restoration of heavy metal cadmium-contaminated farmland, which can solve the problems of long cycle of inoculants and the like

Inactive Publication Date: 2015-05-13
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

Chinese invention patent (201410197384.0) invented a method of using the mycorrhizal fungus Glomus terrescens combined with Solanum nigrum to repair heavy metal pollution. However, Solanum nigrum fruit and roots are edible or used as medicine, which has certain limitations as a repairing plant. At the same time, corn is used The preparation cycle is long

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  • Method for repairing farmland soil polluted by cadmium through using combination of arbuscular mycorrhizal fungi and sedum plumbizincicola
  • Method for repairing farmland soil polluted by cadmium through using combination of arbuscular mycorrhizal fungi and sedum plumbizincicola
  • Method for repairing farmland soil polluted by cadmium through using combination of arbuscular mycorrhizal fungi and sedum plumbizincicola

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Embodiment Construction

[0017] The present invention utilizes arbuscular mycorrhizal fungus combined with Sedum sedum to intensify restoration of cadmium-contaminated farmland soil, and the specific method is as follows:

[0018] (1) Propagation of arbuscular mycorrhizal fungi

[0019] The arbuscular mycorrhizal fungal agent is A. Acaulospora laevis 34), Aseospermum honeycolor ( Acaulospora mellea 40) or Glomus mosei ( Glomus mosseae 90107), preserved in the Nanjing Soil Research Institute of the Chinese Academy of Sciences; the host plants used for the propagation of arbuscular mycorrhizal fungal agents are clover (winter) or sudan grass (other seasons). The soil used for the propagation of arbuscular mycorrhizal fungi was collected from a heavy metal cadmium-contaminated farmland soil in Xiangtan County, Hunan Province. The cadmium pollution concentration was 0.68 mg / kg, which exceeded the national secondary environmental quality standard value. Its basic physical and chemical properties are ...

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Abstract

The invention discloses a method for repairing farmland soil polluted by cadmium through using a combination of arbuscular mycorrhizal fungi and sedum plumbizincicola. The method comprises the steps that expanding propagation is conducted on arbuscular mycorrhizal fungi inoculant, and repair is conducted through inoculating the farmland soil with the inoculant to strengthen the sedum plumbizincicola. According to the method for repairing the farmland soil polluted by the cadmium through using the combination of the arbuscular mycorrhizal fungi and the sedum plumbizincicola, it is proved in the experiment that in the mode of normal field management, the growth of the sedum plumbizincicola can be promoted through inoculating the arbuscular mycorrhizal fungi inoculant, repair on the cadmium of the soil by the sedum plumbizincicola is improved, and the total amount of the extraction of the cadmium can be increased by 75% to a maximum.

Description

technical field [0001] The invention belongs to a method for repairing heavy metal cadmium-contaminated farmland, and in particular relates to a biointensification method for repairing cadmium-contaminated farmland soil by using arbuscular mycorrhizal fungi combined with sedum sedum. Background technique [0002] Cadmium (Cd) is currently the largest source of heavy metal pollution in soil. After the environment is polluted by cadmium, cadmium can be enriched in organisms, such as "cadmium rice", which enters the human body through the food chain, damages kidney tubules and can cause osteoporosis and other diseases. Seriously endanger human health and ecological security. Therefore, how to reduce the content of heavy metal cadmium in soil and ensure food safety has become a hot spot in recent years. Now there are many remediation methods for cadmium-contaminated soil, including: physical measures, chemical measures, biological measures, ecological measures, etc. However, t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00A01B79/02
Inventor 林先贵朱清禾曾军胡君利
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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