RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2008, Vol. 17 >> Issue (1): 113-113.

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SPATIAL VARIABILITY OF SELENIUM IN SOIL ENVIRONMENT AND  ITS CORRELATION WITH HUMAN HEALTH IN THE YANGTZE RIVER DELTA OF CHINA

SUN Weixia| ZHAO Yongcun| HUANG Biao| LIAO Jingjing| WANG Zhigang| WANG Hongjie   

  • Received:1900-01-01 Revised:1900-01-01 Online:2008-01-20

Abstract:

Selenium (Se) deficiency or excess in agricultural environment can induce some endemic disease or health risk through food chains.In this paper,the spatial variability and the driving factors of Se in soil environment were studied with the help of GIS and Geostatistics based on 203 soil samples in Rugao County,Jiangsu Province.Meanwhile,the correlations between the spatial distribution of longevity ratio and water soluble Se in topsoil were discussed.The results indicated that the study area is in the low Se soil environment,the average of total Se and water soluble Se in topsoil is 013 and 242 μg/kg respectively.Water soluble Se in the environment might be an advantageous contributor to the bioavailability,flux in food chains and human health.It is more sensitive to soil physicochemical properties especially available P,soil organic matter and total K,so the spatial distribution of water soluble Se is higher in the east and north parts of the county.A very significant (〖WTBX〗P〖WTBZ〗<001) correlation between water soluble Se in topsoil and the longevity ratio suggests that water soluble Se in soil environment has significant effect on the longevity of human beings.However,the essential mechanism of the longevity in human beings is expecting for further study.

Key words: soil environment, Selenium (Se), spatial variability, human health

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