东北地区生态环境中的Se及其生态效应

Selenium in eco-environment of northeast China and its ecological effect

对东北地区不同环境要素（基岩、土壤、植物、动物和人体）Ｓｅ的分布与转化规律的研究表明，基岩、土壤、粮食和动物毛Ｓｅ含量分别为０．１２、０．１５０－０．５４０、０．００９６－０．０７６５和０．０４０５－０．１４１４μｇ·ｇ（－１）；城市和农村儿童发Ｓｅ含量为０．４６０和０．１８２μｇ·ｇ（－１）．根据不同要素Ｓｅ含量和生态效应，可将该区分为Ｓｅ适宜区、缺乏区和过渡区３个１级区．每个１级区又分为高Ｓｅ源区和低Ｓｅ源区．

Studies on selenium distribution-and its transforming regularity in different environmental elements of northeast China show that Se contents in bed roch,soil, plant and animal hairs are 0. 12, 0. 150-0. 540 , 0. 0096-0. 0765 and 0. 0405-0. 1414μg·g-1),and those in children hairs in urband and rural regions are respectively 0. 460 and 0.182μg· g(-1). Based on Se contents in different comPOnents and ecological effects,the region is divided into three first-grade areas, e. g. Se suitable area, Se deficiency area and Se transitional area, and each is classified into higher and lower Se source areas.