我国部分高硒低硒土壤的成因初探

A discussion on the cause of high-Se and low-Se soil formation

对我国部分地区高硒低硒土壤的形成原因作了初步探讨，认为母质（母岩）类型是导致土壤含硒量高低的主要原因，生物、气候、地形等对土壤含硒量的消长也起着一定作用。

This paper deals with some factors affecting soil Se content.It is concluded from theresults that parent material plays a key role in the formation of high Se and lovv Se soils. Other fac-tors such as climate,biology,relief and landscape also have effect to increase or deerease soil Selevel in some extent.High Se soils are associated with high Se parent materials,strong biologicalaccumulation,weak eluviation and weak e,osion,meanwhile,low Se soils are associated with lowSe parent materials,strong eluviation serious erosion and weak biological accumulation.