植物修复镉污染土壤的差异性研究

以茶花凤仙和百日草为供试植物,对不同镉浓度条件下两种植物的生物量、镉含量及其对镉的吸收、富集状况进行了研究.结果表明,不同程度镉浓度处理的土壤中生长的茶花凤仙和百日草对镉的吸收和富集特性不同,生物量随土壤镉浓度的升高而升高,但达到一定浓度时,生物量又随土壤镉浓度的升高而降低.茶花凤仙在低浓度区域,富集镉的能力要强于百日草,但是在高浓度区域时,茶花凤仙富集镉的效果却低于百日草的富集效果.本试验中所选的两种植物,百日草和茶花凤仙均没有达到超积累植物要求的标准.

Phytoremediation Differences in Cadmium Polluted Soil

This article studies the biomass and the content,absor bance,and enrichment of cadmium of the two tested plants of I mp atiens balsamica and Zinnia eleg ans Jacq under different conditio ns of cadmium concentration. Results show that by the tw o plants grow ing in soil have the different characteristics of cadmium absorbance and enrichment under the different conditions of cadmium concentration.The biomass increases with the increase in cadmium concentration and then decreases at a certain co ncentration.The enrichment ability of cadmium for I mp atiens balsamica is stronger than Zinnia elegans Jacq at the low concentration, but it converses in the high co ncentration.So,neither of the two tested plants reaches the standard of the hy peraccumulator.