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当前位置: 首页 > 文章 > 铬超富集植物李氏禾对铜的富集特征研究 农业环境科学学报 2008,27 (02) 123-126
Position: Home > Articles > Characteristics of Copper Uptake by Cr-hyperaccumulator Leersia Hexandra Swartz Journal of Agro-Environment Science 2008,27 (02) 123-126

铬超富集植物李氏禾对铜的富集特征研究

作  者：
张学洪;陈俊;李海翔;胡澄;梁延鹏;黄海涛;刘杰
单  位：
桂林工学院资源与环境工程系
关键词：
李氏禾;铜;植物修复;富集特征
摘  要：
李氏禾是中国境内发现的第一种铬超富集植物。本文通过野外调查和水培试验,研究了李氏禾对铜的富集特征。野外调查结果表明,李氏禾能够将淤泥和水体中的铜转运到地上部,叶中铜平均含量为1717.85mg·kg-1,根和茎中铜平均含量为533.42mg·kg-1,叶中铜含量与水和淤泥中铜含量之比分别为291.88和14.01。营养液培养条件下,李氏禾对铜也有较强的富集能力。当培养液中铜浓度为40mg·L-1时,叶中铜含量最高达到2357.26mg·kg-1。这些结果表明,无论是在野外生长条件下还是在营养液培养条件下,李氏禾均对铜表现出很强的富集能力。李氏禾生长迅速,地理分布广,且能对铜、铬等多种重金属产生富集,因此,是一种优良的修复铜、铬等重金属污染土壤和水体的物种。
译  名：
Characteristics of Copper Uptake by Cr-hyperaccumulator Leersia Hexandra Swartz
作  者：
ZHANG Xue-hong1, CHEN Jun1,2, LI Hai-xiang1, HU Cheng1, LIANG Yan-peng1, HUANG Hai-tao1, LIU Jie1 (1. Department of Resources and Environmental Engineering, Guilin University of Technology, Guilin 541004, China; 2. Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)
关键词：
Leersia Hexandra Swartz; copper; phytoremediation; accumulating characteristics
摘  要：
Leersia Hexandra Swartz is a hygrophyte Cr-hyperaccumulator plant first discovered in South China (Guangxi Zhuang Automonous Region). Field survey and hydroponics cultivation experiments were conducted to investigate the characteristics of copper uptake by the plant. The results showed that this species had a marvelous capacity to accumulate Cu under the field condition and nutrient solution cultivation. In the field samples, the average copper concentration in leaves and stems were 1 717.85 mg·kg-1 and 533.42 mg·kg-1, respectively, the mean ratios of copper concentration in leaves to that in water and soil were 291.88 and 14.01, respectively. Under hydroponics cultivation conditions, Leersia Hexandra Swartz showed a remarkable uptake capacity for copper also. At the Cu2+ concentration of 40 mg·L-1 in the nutrient solution, the copper concentration in the leaves reached the maximum (up to 2 357.26 mg·kg-1). Leersia Hexandra Swartz is a species which grows rapidly, distributes widely and could accumulate Cr, so it can be used as a new plant resource for phytoremediation of copper and chromium contaminated soils and waters.

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