紫色土Zn、Cd复合污染生态效应研究  

Ecological effect of exotic Cd-Zn compound pollution on purple soil.

作　　者：朱波[1] 青长乐[2] 牟树森 

机构地区：[1]中国科学院成都山地灾害与环境研究所,成都610041 [2]西南农业大学资源环境学院,重庆630716

出　　处：《应用生态学报》1997年第6期639-644,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金资助项目 !( 3 880 1 4 1 )

摘　　要：通过盆栽生物试验结合野外典型污染调查 ,研究紫色土Zn、Cd复合污染对莴笋、蕃茄、甘兰、小麦等的作物效应 .结果表明 ,Zn、Cd复合污染对Zn表现为加和作用 ,低浓度Cd促进Zn吸收 ,加重Zn对养分吸收的抑制 ,加剧Zn的毒害作用 ;复合效应对Cd表现为竞争作用 ,高浓度Zn抑制Cd吸收 ,减轻Cd对养分吸收的抑制 ,缓解Cd毒性 ,向土壤添加Zn 50 0mg·kg- 1 为供试盆栽条件下拮抗效应的临界值 .Pot experiment and field investigation were conducted to study the effect of CdZn compound pollution on purple soil cropped with wheat, lettuce, tomato and cabbage. The results show that Cd-Zn compound pollution has a synergistic effect on Zn. Low content of Cd can promote Zn uptake, exasperate its inhibition on nutrient absorption and aggravate Zn toxicity. Conversely, CdZn compound pollution has an antagonistic effect on Cd. High content of Zn can restraine Cd uptake, reduce its inhibition on nutrient absorption, and thereby, alleviate Cd toxicity. Application of 500 mg Zn·kg -1 soil is the threshold of antagonistic effect under pot experimental condition.

关 键 词：污染生态学 紫色土 复合污染 锌 镉 

分 类 号：X171[环境科学与工程—环境科学] S155.25[农业科学—土壤学]