鄱阳湖湿地22种植物重金属富集能力分析

Absorption and Accumulation of Heavy Metals by Plants in Poyang Lake Wetland

针对目前鄱阳湖重金属积累植物缺乏研究,采用野外采样系统分析法,对鄱阳湖湿地22种杂草植物进行Cu、Pb、Zn、Cd积累能力的初步系统研究,研究结果表明:鄱阳湖湿地已受到重金属的不同程度污染。灰化苔草(Carex cinerascens Kukenth.)对Pb的富集能力强;飞廉(Carduus crispus L.)和小窃衣[Torilis japonica(Houtt.)]对Zn的富集系数和转移系数都大于1,且叶部Zn含量大;南荻(Miscanthussacchariflorus)、一年逢(Erigeron annuus)、飞廉、鼠曲草(Herba GnapHaii Affinis)具有重金属Cd富集植物的基本特征。此6种植物可以作为鄱阳湖湿地重金属污染修复植物的选择对象,其进一步研究的价值很大。

This paper focus on the absorption and accumulation of heavy metals lead, zinc, copper and cadmium by 22 plant species in the Poyang Lake, by the view of the eurrent lack of research on plant accumulation of heavy metals by Field Sampling System. The .results showed that： the Poyang Lake wetland had been polluted by heavy metals at different levels; Carex cinerascens Kukenth. had a higher capability of absorbing and accumulating on Pb. The Zu bioeoncentration factor and transport coefficient of Carduus crispus L. and Torilis japonica （Houtt.） were greater than 1, and Zn concentrations in the leaves. Miseonthussaechariflorus, Erigeron annuus, Carduus erispus L. and Herba GnapHaii Affinis possessed basic characteristics of accumulation on Cd. These six kinds of plants can be used as Poyang Lake wetland plant rehabilitation of heavy metal pollution of choice, the great value of further study.