土壤重金属化学形态的空间异质性及其影响因素研究  

Spatial Variability of Sequential Extraction Parts of Heavy Metals and its Affecting Factors in Soil

作　　者：杨炜林[1] 祖艳群[1] 李元[1] 

机构地区：[1]云南农业大学资源与环境学院,云南昆明650201

出　　处：《云南农业大学学报》2007年第6期912-916,共5页Journal of Yunnan Agricultural University

基　　金：国家自然科学基金项目(30560034);云南省科技攻关项目(2006NG17);云南省教育厅基金(JY0178B)

摘　　要：介绍了重金属在土壤中的存在形态,讨论了土壤重金属化学形态的空间变异规律及影响因素,土壤中重金属化学形态及其迁移能力与土壤pH值、有机质、机械组成和作物根际环境有关。土壤重金属的不同形态在空间的分布、迁移能力影响着其生物的有效性及环境安全。This paper introduced sequential extraction parts of heavy metals in soil, and discussed regulating and affecting factors of the spatial variability of the chemical speciation of in soil. sequential extraction parts contents and its transfer ability are related with the soil pH, organic matter, mechanical composition and crop root border environment. And distribution of heavy metals and transfer ability influence in the bioavailability of heavy metals and the extent of harmness to the ecosystem.

关 键 词：土壤 重金属 空间异质性 影响因素 

分 类 号：S153.61[农业科学—土壤学]