5种草本植物对土壤重金属铅的吸收、富集及转运  

Characteristics of Uptake,Bioaccumulation and Translocation of Soil Lead(Pb)in Five Species of Herbaceous Plants

作　　者：郭晓宏[1] 朱广龙[1] 魏学智[1] 

机构地区：[1]山西师范大学生命科学学院,山西临汾041000

出　　处：《水土保持研究》2016年第1期183-186,共4页Research of Soil and Water Conservation

基　　金：国家自然科学基金"酸枣对极端干旱气候响应机理研究"(30972396)

摘　　要：以临汾西山煤矿周边的5种优势种植物苍耳(Xanthium sibiricum)、夏至草(Lagopsis supina)、蒲公英(Taraxacum mongolicum)、灰绿藜(Chenopodium glaucum)、早熟禾(Poa annua)为试验材料,研究植物修复土壤重金属铅的污染,分析比较其对铅的吸收、转运和富集的能力。结果表明:在铅处理下早熟禾的生物量最大;5种植物地上部分对铅的吸收量在10 000mg时均达到1 000mg/kg以上,其中夏至草的吸收量最高,达5 447.25mg/kg;地下部分对铅的吸收量在10 000mg时也达到1 000mg/kg以上,以苍耳最高,达13 448.5mg/kg。夏至草的转运系数和富集系数最高,为铅超富集植物,其余4种植物对重金属铅也有很好的吸收富集作用。Five species of herbaceous plants such as Xanthium sibiricum,Lagopsis supina,Taraxacum mongolicum,Chenopodium glaucumand Poa annua were used to study the uptake,bioaccumulation and translocation of soil heavy metal lead（Pb）and to explore the restoration capacity of plant to soil severely polluted by Pb near the western hills of Linfen City.The results showed that the biomass accumulation of Poa annua was the highest among the tested plants under Pb treatment;the contents of Pb in above-ground biomass of all plants were greater than 1 000mg/kg in 10 000 mg treatment group,particularly in Lagopsis supina,it illustrated the highest content and reached to 5 447.25 mg/kg.In the under-ground biomass,the similar trend as the above-ground biomass was observed,and the contents also reached up to 1 000mg/kg in 10 000 mg treatment group,the maximum content was 13 448.5mg/kg in the Xanthium sibiricum.The biological concentration factor and translocation factor of Lagopsis supine were all the highest,therefore,the results suggested that the Lagopsis supina was the Pb hyperaccumulation plant,and the other four kinds of plants have strong ability of Pb uptake,and they all can be used to remedy soil polluted by heavy metal.

关 键 词：铅污染 植物修复技术 生物量 生物富集系数 转运系数 

分 类 号：X53[环境科学与工程—环境工程] X173