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干旱区绿洲土壤中Cd,Pb,Zn形态分布与芹菜有效性
引用本文:黄璜,南忠仁,刘晓文,赵转军,胡小娜.干旱区绿洲土壤中Cd,Pb,Zn形态分布与芹菜有效性[J].兰州大学学报(自然科学版),2010,46(1).
作者姓名:黄璜  南忠仁  刘晓文  赵转军  胡小娜
作者单位:兰州大学,资源环境学院,西部环境教育部重点实验室,兰州,730000
基金项目:国家自然科学基金项目(40671179,40671167);;国家环境保护公益性项目(NEPCP200809098);;国家重点基础研究发展计划(973计划)项目(2008CB417212)
摘    要:以干旱区绿洲耕层土壤为研究对象,通过盆栽试验,利用Tessier连续提取法研究了原状土以及外源可溶性重金属Cd,Pb,Zn加入土壤后重金属形态分布,分析了土壤中重金属不同化学形态与芹菜有效性之间的关系。结果表明:原状土壤中Cd主要以铁锰氧化态和碳酸盐结合态形式存在,Pb和Zn主要以残渣态形式存在;随着重金属负荷的增大,三种重金属各形态质量分数均有不同程度的提高,Cd以可交换态和碳酸盐结合态为主要赋存形态,Pb和Zn均以碳酸盐结合态和铁锰氧化态为主要赋存形态。实验土壤中,对芹菜Cd吸收量贡献最大的分别为可交换态和碳酸盐结合态,对Pb吸收量贡献最大的分别是碳酸盐结合态和铁锰氧化态,对Zn吸收量贡献最大的分别是碳酸盐结合态和可交换态。

关 键 词:干旱区绿洲土壤  重金属  芹菜  逐步回归分析  

Form distributions of Cd, Pb and Zn and their availability to celery in arid oasis soil
HUANG Huang,NAN Zhong-ren,LIU Xiao-wen,ZHAO Zhuan-jun,HU Xiao-na.Form distributions of Cd, Pb and Zn and their availability to celery in arid oasis soil[J].Journal of Lanzhou University(Natural Science),2010,46(1).
Authors:HUANG Huang  NAN Zhong-ren  LIU Xiao-wen  ZHAO Zhuan-jun  HU Xiao-na
Institution:Key Laboratory of Western China's Environmental Systems with the Ministry of Education/a>;School of Resources and Environmental Sciences/a>;Lanzhou University/a>;Lanzhou 730000/a>;China
Abstract:Soil samples were collected from the plowing layer of the arid oasis region and studied through pot experiments.Using Tessier sequential extraction,the distribution of chemical forms of heavy metals added in tested soil was investigated,as well as the relationship between the concentrations of chemical forms of studied heavy metals and their availability to celery.The results show that Cd existed mainly in Fe-Mn oxides bound form,while Pb and Zn mainly in residual fraction in the original soil.With the incr...
Keywords:arid oasis soil  heavy metal  celery  stepwise regression analysis  
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