贵州开阳地区土壤中硒的地球化学特征  

Geochemical Characteristics of Selenium in Soils of Kaiyang Region,Guizhou Province

作　　者：李娟[1] 龙健[2] 汪境仁[2] 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]贵州师范大学资源与环境科学系,贵州贵阳550001

出　　处：《土壤通报》2004年第5期579-582,共4页Chinese Journal of Soil Science

基　　金：贵州省自然科学基金项目资助[黔科合政字(1999)7020]

摘　　要：以贵州开阳地区典型土壤为对象,研究了开阳地区土壤中硒元素的含量、分布及影响因素。结果表明,开阳地区土壤中硒的背景值高,其含量远高于全国土壤背景值;硒在土壤剖面上的分布存在空间差异,总体趋势是硒在表土层聚集;土壤中硒含量受土壤成土母质的控制。同时,表生地球化学作用、生物作用以及人类活动也深刻影响它们在土壤中的重新分配。The typical soil types in Kaiyang region, Guizhou Province were selected as investigative objects,and the concentrations and distributions of Se in soils were studied. The results were showed as follows: The mean concentrations of Se in soils of Kaiyang region were far higher than background value in soils of the whole China; distribution of Se in soil profiles were not the same. In general, Se was enriched in surface soil layer; Se concentrations in soils were mainly governed by its concentrations of soil parent materials. Otherwise, environmental geochemical process, biologic processes and human actions can also profoundly affect the concentrations and redistribution of Se in soils.

关 键 词：贵州开阳 硒 土壤 地球化学 

分 类 号：S153[农业科学—土壤学]