Many factors can affect the regional differentiation of soil selenium. Among them, soil type, soil texture, land use type and vegetation type are four main factors by pricipal component calculation. 41 Soil types. were regionalized in China according to the study, and the safety threshold of soil selenium contents in different regions was determined. The results would provide scientific basis for formulating the environmental quality standard of soil selenium in China.
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布和敖斯尔,张东威,刘力.土壤硒区域环境分异及安全阈值的研究[J].土壤学报,1995,32(2):186-193. Buber Aoseer, Zhang Dongwei, Liu Li. REGIONAL ENVIRONMENTAL DIFFERENTIATION AND REGIONAL SAFETY THRESHOLD OF SOIL SELENIUM[J]. Acta Pedologica Sinica,1995,32(2):186-193.