干旱区绿洲土壤中Cd、Pb、Zn、Ni复合污染对芹菜的影响及其富集迁移规律  

Effects of Cd,Pb,Zn and Ni on celery growth and their enrichment and transfer characters in arid oasis soils

作　　者：廖琴[1] 王胜利[1] 南忠仁[1] 晋王强[1] 武文飞[1] 

机构地区：[1]西部环境教育部重点实验室,兰州大学资源环境学院,兰州730000

出　　处：《干旱区资源与环境》2011年第7期173-177,共5页Journal of Arid Land Resources and Environment

基　　金：兰州大学中央高校基本科研业务费专项资金(lzujbky-2009-65);国家环境保护公益性项目(NEPCP200809098)资助

摘　　要：通过盆栽试验和室内分析初步研究了干旱区绿洲土壤中Cd、Pb、Zn、Ni复合污染对芹菜生长的影响及重金属在芹菜体内的富集迁移规律。结果表明:随着外源重金属添加量的增加,芹菜的生长受到明显抑制。根据多元回归分析和偏相关分析,芹菜地上部和根部吸收Pb量分别与外源添加Pb、Zn、Ni量和Cd、Pb、Zn、Ni量达到极显著相关,其中土壤Zn含量的增加极显著的降低了芹菜地上部和根部对Pb的吸收。芹菜地上部及根部对Cd、Pb、Zn、Ni四种元素的富集系数大小顺序均为:Cd>Zn>Ni>Pb,且根部对四种重金属元素的富集能力显著大于地上部。Cd在芹菜中的平均迁移能力最强,Zn、Ni次之,Pb的迁移能力最弱。Pot experiment was conducted to study the effects of Cd,Pb,Zn and Ni on celery growth and heavy metals accumulation and migration in celery when grown in arid oasis soils.The results showed that with the increase of concentrations of heavy metals added into the soil,the growth of celery roots and leaves were inhibited obviously.According to the results of multiple regression and partial correlation analysis,the absorbtion of the four elements in celery roots and shoots were affected by their own doses in soil and their interaction sand and there were extremely significant correlation between the contents of Pb accumulated in celery shoots and the exogenous additive amount of Pb,Zn,Ni;The extremely significant correlation between the contents of Pb accumula-ted in celery roots and the exogenous additive amount of Cd,Pb,Zn,Ni.In Cd,Pb,Zn and Ni coexisting elements,Zn supplied in soil significantly suppressed Pb accumulation in celery shoots and roots.The accumulation rate order of heavy metals from soil to the celery was CdZnNi Pb,and the four elements were distributed mainly on the roots of celery.Cd was more mobile than either Zn,Ni or Pb and migrated upwards easily in arid oasis soils.

关 键 词：绿洲土壤 重金属 芹菜 生物量 富集与迁移 

分 类 号：X53[环境科学与工程—环境工程]