天津地区土壤中微量元素含量的纵向分异  

Vertical distribution of trace element contents in soil in Tianjin Area

作　　者：徐尚平[1] 陶澍[1] 曹军[1] 李本纲[1] 沈伟然[2] 张文具 

机构地区：[1]北京大学城市与环境学系,北京100871 [2]天津环境监测中心,天津300191

出　　处：《中国环境科学》1999年第3期226-229,共4页China Environmental Science

基　　金：国家杰出青年基金!49525102

摘　　要：根据８０个土壤剖面１３种微量元素及有关理化参数实测结果，研究了天津地区土壤中微量元素含量的纵向分异，结果表明，天津土壤中绝大多数微量元素含量高于全国平均含量，由于淋溶较弱，发育时间较短，各微量元素含量土壤纵向的分异不明显。Contents of 13 trace metallic elements in the soil collected from 80 locations were measured in TianjinArea. The results showed that the concentrations of most of these metals are higher than the nationwide average.Mainlydue to weak leaching, the contents distributed less evenly along the soil profile. Compared with the soil from the agricultUral area with less human activity, the contents of these metals, especially mercury, in the soil from the near-urban areaincreased markedly. The contents of these metals in the soils derived from alluvial parent materials are 1-1.5 bines higherthan those derived from residual parent material. Due to the parent material of the plain area is primarily from the nearbymountain area, separation based on particle size may be the major reason for this difference. The results of a geostatisticalanalysis indicates that the parent material is the key factor controlling the distribution of these metals; and anthropogenicfactors, to some extent, may also play a role in the distribution.

关 键 词：微量元素 纵向分布 土壤 天津 含量 

分 类 号：X530.2[环境科学与工程—环境工程]