As the chief green plant in city, grassland not only have greatly economic benefit, but also good ecology and social benefit in heavy metal contaminated soil remediation.
草坪作为城市中主要的绿化植物，它在重金属污染土壤修复方面不但具有很大的经济效益，而且还具有很好的生态效益和社会效益。
The concept, kinds and damage to environment of contaminated soil as well as concept, principles, advantages and disadvantages of phytoremediation were introduced.
论述了土壤污染的概念、种类和对环境的危害以及植物修复的概念、机理和优缺点。
The ways in which earthworms perform as bioindicators of soil pollution are reviewed as follows: (1) Earthworm population in contaminated sites reflects the degree of soil pollution as a whole;
从三个方面综述了蚯蚓对土壤污染的指示作用：（1）通过调查污染区土壤中蚯蚓种群的数量和结构反映土壤污染情况；
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