大青、夹竹桃抗铅污染以及污染区植物种类的变化

A Study on the Resistibility of Nerium Indicum and Clerodendrum Cyrtophyllum to Pb Contamination and the Changes of Plant Species in Contaminated Area

采用原子分光光度法、对比盆栽实验方法等,进行了大青、夹竹桃在污染区野生状态下和人工盆栽实验状态下的抗铅性研究;同时比较了污染前、后污染区周围植被的消亡动态。结果表明,夹竹桃、大青有较高的抗铅性,其中夹竹桃效果更好;此外,天然植被中的红叶树、苦槠、商陆、乌蕨也有较强的抗铅污染能力。

By experiment of atomic spectrum and planting trees with flowerpots, a study is made to reveal the resistibility of Nerium indicum and clerodendrum cyrtophyllum to Pb contamination indifferent conditions , for example ,in wild area and in flowerpots. Meanwhile, it is necessary to analyse the changes of the vegetables by comparing to the differences between uncontaminated period and contaminated one. The results of the study show as follows. plants of both Neriurn indicum and Clerodendrurn cyrtophyllum have strong ability to absorb Ph in contaminated area , and Nerium indicum is better. In addition , other species of wild vegetable in contaminated area , like Helicia cochinchinensis , Castanopsis sclerophylla ,Phytolacca acinosa and Stenoloma chusanum, show their ability of resistance to Pb contamination.