南荻对土壤铅污染的耐性与吸收积累研究  

Investigation on Endurance and Adsorption Behaviors of Triarrhena Lutarioriparia of Lead in Soil

作　　者：毛石花[1] 罗琳[1] 陈雨佳[1] 何强[1] 

机构地区：[1]湖南农业大学,湖南长沙410128

出　　处：《环境科学与管理》2013年第1期55-57,80,共4页Environmental Science and Management

基　　金：国家"863"计划课题(2010AA065203);国家科技支撑项目(2012BAC09B00)

摘　　要：通过土壤盆栽试验,研究了不同浓度梯度pb2+胁迫下南荻整个生长发育周期的生长、土壤理化性状的变化以及不同生长阶段的根系固定重金属含量变化的过程,结果表明:(1)种植南荻植物的土壤pH值随着月份的变化呈减小趋势;(2)种植南荻的土壤中铅随植物的生长逐渐减少;(3)南荻对重金属铅的积累顺序为:根>叶>茎,对土壤中重金属的修复机理主要是通过根系固定作用。Through soil pot experiment, this paper discusses the whole growth periods of triarrhena lntarioriparia, the change of basic properties of the tested soil and the adsorption behaviors of lead under different lead content. The results showed that the soil pH declined with the growth time of triarrhena lntarioriparia, the content of Pb2 ＋ in the soil reduced gradually with the growth of plant and the accumulation of heavy mental Pb2 ＋ in triarrhena lutarioriparia present the rule of root 〉 leaf 〉 stem. The restora- tion mechanism is based on root fixing.

关 键 词：南荻 铅污染 耐性 吸收 根系固定 

分 类 号：X835[环境科学与工程—环境工程]