关中东部全新世剖面土壤重金属元素分布特征与环境演变  

Distribution characteristics of heavy metals in the Holocene profile and its environmental changes in eastern Guanzhong

作　　者：王丽娟[1] 庞奖励[1] 黄春长[1] 丁敏[1] 李艳华[1] 牛晓露[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《干旱地区农业研究》2011年第4期127-132,共6页Agricultural Research in the Arid Areas

基　　金：国家自然基金重点项目(41030637);中央高校基本科研业务费专项基金(GK200901007)

摘　　要：以关中东部全新世黄土-古土壤剖面为研究对象,分析了Ni、Mn、Cu、Zn、Nb、As、Ti、V、Co和Pb十种土壤重金属元素的含量及其分布特征,并与磁化率、Rb/Sr曲线进行了比对和相关性分析,研究结果表明:Ni、Cu、As、V、Mn、Zn和Nb重金属元素的动态变化与全新世以来成壤环境的变化趋势是一致的,暗示全新世土壤重金属元素受到气候变化、成壤环境的强烈影响;Co元素主要受到成土母质的影响;Pb对成壤环境的敏感性较差。关中东部地区古土壤S0发育时期,土壤重金属元素含量明显增加,这一时期气候温暖湿润,强烈的成壤作用使得易溶性元素发生向下的迁移淋失,导致重金属元素在古土壤层中相对富集。Based on the Holocene loess-soil profile in eastern Guanzhong,we analyzed the content and distribution of Ni,Mn,Cu,Zn,Nb,As,Ti,V,Co and Pb at TSG site and compared with magnetic susceptibility and Rb/Sr.The results showed that the changes of Ni,Cu,As,V,Mn,Zn and Nb were affected by climate change and its pedogenesis environment,Co was contacted closely with soil parent materials,and the sensitivity of Pb into its pedogenesis environment was poor.In the stage of paleosol period in eastern Guanzhong,the content of soil heavy metals was increased significantly,the warm and humid climate during this period,strong pedogenesis making some soluble elements migration and leaching,leading to relative enrichment of heavy metals in the paleosol.

关 键 词：重金属元素 全新世 关中东部 

分 类 号：S153.61[农业科学—土壤学]