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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

Inactive Publication Date: 2012-10-10
HENAN UNIV OF URBAN CONSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no unified standard for the systematic screening of restoration plants in the world. The reported hyperaccumulator / hyperaccumulator plants are mainly limited to screening in heavy metal-contaminated soils, which only account for a small part of the world, which greatly limits Discovery of the number and species of hyperaccumulators

Method used

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  • Efficient arsenic-absorbed ecological ciliate desert-grass screening method
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  • Efficient arsenic-absorbed ecological ciliate desert-grass screening method

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Embodiment 1

[0040] A screening method for arsenic-absorbing high-efficiency ecological type centipede grass

[0041] The arsenic-absorbing high-efficiency ecological centipede grass was screened out in three steps by hydroponics test and soil culture test.

[0042] Cultivation of centipede grass seedlings : In the middle and late October of 2008, the mature spores of Centipede Grass that grow naturally in many areas of my country were collected. The sampling locations include: 3 non-polluted areas [Hong Kong Tai Pojiao Nature Reserve (referred to as Hong Kong), Sun Yat-sen University Campus in Guangdong Province (referred to as Guangzhou) and the forest land of Guangxi Institute of Botany in Nanning City, Guangxi Province (Nanning for short)] and four arsenic-polluted areas [Lechang tailings area in Shaoguan City, Guangdong Province (Lechang for short), lead and zinc in Dashun Ridge, Guiyang County, Hunan Province] Abandoned mining area (Dashunlong for short), Yejiwei lead-zinc abandone...

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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.

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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Application Information

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IPC IPC(8): A01H1/04A01G31/00
Inventor 吴福勇李会杰刘军华
Owner HENAN UNIV OF URBAN CONSTR
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