Study on the remediation effect of different grasses on heavy metal contaminated soil in mining area
In this study,three types of herbaceous plants,namely ryegrass,bentgrass and Ber-mudagrass,were used to expound the effects of drought stress on plant growth,and to ex-plore the remediation effects of different grasses on heavy metal(HMs)contaminated soil in arid and semi-arid areas,in order to screen out drought-tolerant herbaceous plants suitable for planting in metal mining areas.The results showed that ryegrass had higher biomass ac-cumulation under soil conditions than Bentgrass and Bermudagrass,and the biomass de-creased less under drought conditions(P＜0.05),and the MDA and EL contents of ryegrass were lower,indicating that ryegrass had better drought tolerance and the ability to respond to heavy metal toxicity effects(P＜0.05).In the remediation of heavy metal contaminated soil,ryegrass had the highest contents of Cd,Pb and Zn,and the enrichment coefficient of Cd could reach 0.98,and the removal efficiency of Cd in soil was as high as more than 50％and 15.5％respectively.Therefore,it was concluded that ryegrass had better remediation poten-tial for Pb,Zn and Cd contaminated soils in Fengxian mining area.
万方数据
维普
