综述了土壤中Se的形态分布、有效性研究方面的进展，论述了不同形态的Se在土壤中的分布情况，对Se的有效性与土壤pH值、化学及矿物学组成、氧化还原状态等物理化学性质的关系进行了探讨。%Selenium is a necessary trace element for the health of people. As an essential microelement,Selenium has been gradually known by people in recent years,and it is also attracted public attention to the scientists. This paper reviews progress in the studies of forms and bioavailability of selenium（Se） in soil,and discusses the distribution of different forms of Se in soil,and the relationship between the effectiveness of Se and the physical and chemical properties, soil pH,chemical and mineralogical composition and oxidation -- reduction status.
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