Efficient arsenic-absorbed ecological ciliate desert-grass screening method

A screening method, the technology of centipede grass, applied in the field of phytoremediation, can solve the problems of limiting the number and types of hyperaccumulator plants, and achieve the effects of low screening cost, strong operability, and easy collection
CN102715082AInactive Publication Date: 2012-10-10HENAN UNIV OF URBAN CONSTR
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HENAN UNIV OF URBAN CONSTR
Publication Date
2012-10-10
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to an efficient arsenic-absorbed ecological ciliate desert grass screening method. The method comprises the following steps: conducting field ciliate desert-grass acquisition in multiple regions of China, and carrying out captive breeding of ciliate desert-grass seedlings; conducting short-term water culture experiment in arsenic-containing nutrient solution by utilizing ciliate desert-grass seedling of the right age in multiple regions, and initially screening out 2-5 ecological ciliate desert-grass with higher arsenic concentration of the overground part; and transplanting the 2-5 initially screened out ecological ciliate desert-grass with higher arsenic concentration of the overground parts to different gradients of artificial simulated arsenic-polluted soil for culturing for 12 weeks, and preferentially screening out efficient arsenic-absorbed ecological ciliate desert grass by taking overground part biomass liveweight, overground part arsenic concentration, overground part arsenic absorption total quantity, and arsenic tolerance index number of the ciliate desert-grass as indexes. The screening method is simple and feasible, high in routinization, and easy to popularize, and has important meanings on restoring the arsenic-polluted soil and protecting the quality safety of agricultural products.
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Description

technical field

[0001] The invention relates to phytoremediation technology, and relates to a screening method for heavy metal hyperaccumulation / hyperaccumulation plants, in particular to a screening method for high-efficiency arsenic absorption ecological centipede grass. Background technique

[0002] Arsenic exists widely in natural water bodies and soils. Although it belongs to the same family as phosphorus, arsenic and its compounds are considered carcinogens. Metal mining and smelting, sludge agricultural use, fertilizers, herbicides, pesticides and other agricultural chemicals used in large quantities, and arsenic-contaminated groundwater for irrigation of farmland are the main reasons for the excessive accumulation of arsenic in the soil. In recent years, arsenic pollution has been a very prominent environmental problem in the world (especially in Southeast Asia and my country) and needs to be solved urgently. At present, the area of ​​cultivated land polluted (inclu...

Claims

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