【摘要】 以秦岭腹地凤县典型铅锌尾矿区周边的农田土壤为研究对象，采用黑麦草、剪股颖、百慕大草三种类型的草本植物进行室内盆栽实验，阐述了干旱胁迫对植物生长的影响，探究不同禾本科植物在干旱半干旱地区对重金属污染土壤的修复效果，以期筛选出能够适合在金属矿区修复中种植的耐旱性草本植物.结果表明：相比剪股颖和百慕大草，黑麦草在该土壤条件下能够具有较高的生物量累积，且在干旱条件下生物量降低的较少(P<0.05),黑麦草的丙二醛(MDA)含量与电导率(EC)较低，说明其具有较好的耐旱能力和较高的重金属耐受能力(P<0.05).在重金属污染土壤修复中，黑麦草中Cd、Pb和Zn的含量最高，且对Cd的富集系数可达到0.98,种植黑麦草对土壤中Cd的去除效率高达50%以上，Pb的去除效率为15.5%.因此，研究认为黑麦草对于凤县矿区Pb、Zn和Cd污染土壤具有更好的修复潜力.更多还原

【Abstract】 In this study, three types of herbaceous plants, namely ryegrass, bentgrass and Bermudagrass, were used to expound the effects of drought stress on plant growth, and to explore 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 accumulation under soil conditions than Bentgrass and Bermudagrass, and the biomass decreased 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 potential for Pb, Zn and Cd contaminated soils in Fengxian mining area.更多还原