杂草对重金属的生物积累特性的研究

Study on the Bioaccumulation Character of Weeds for Heavy Metals in Polluted Soil

采用小区实验法对东北地区 1 1科 2 2种田间杂草进行重金属累积特性研究。结果表明 :欧洲千里光、巨荬菜、欧亚旋覆花、猪毛蒿、黄花蒿、石防风和柳叶刺蓼 7种植物对 Cd的富集系数最大 ,且地上部 Cd的含量大于根部 Cd的含量 ,具备了重金属超富集植物的基本特征 ;植物地上部重金属含量与植物上部生物量的大小无关 ;以杂草为研究对象 ,有可能筛选出地上部重金属富集量大并且地上部生物量也高的超富集植物。

Bioaccumulation of 22 weed species belonging to 11 families for heavy metals(Cd,Pb,Cu and Zn)in polluted soil were studied using the block method.The results show that the bioaccumulation coefficience in the aboveground of Scnecio vulgaris、Sonchus brachyotus、Znula Britannica、Artemisia scoparia、Artemisia annua、Peucedamum terebinthaceum and Polygonum bungeanum are more l respectively,and the concentration of Cd in the aboveground of plant is more than that in root,which possessed basic characteristics of hyperaccumualtors,that heavy metal concentration in the aboveground of plant does not relate with the biomass of the aboveground of plant and that it is possible to pick out hyperaccumulator with high heavy metal concentration and biomass in the aboveground of plant from weed species.