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Soil selenium concentration and Kashin-Beck disease prevalence in Tibet, China |
Shunjiang LI1,2(), Wei LI1, Xia HU3, Linsheng YANG2, Ruodeng XIRAO4 |
1. School of Environment, Beijing Normal University, Beijing 100875, China; 2. Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 3. Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China; 4. Tibet Municipality Centers for Disease Control and Prevention, Lhasa 850000, China |
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Abstract In order to investigate the correlation between the prevalence of Kashin-Back disease (KBD) and Se concentrations, natural soil samples and cultivated soil samples were collected from southeastern Tibet, China; and the soil Se concentrations were measured by atomic fluorescent spectrophotometer. It was found that the mean Se concentrations of natural soil samples in KBD areas, from the first layer to the third layer, were 0.17 mg/kg, 0.11 mg/kg, and 0.10 mg/kg, respectively, and in non-disease areas were 0.21 mg/kg, 0.24 mg/kg, and 0.13 mg/kg, respectively. The mean Se concentrations of cultivated soil samples were 0.10 mg/kg in KBD areas and 0.23 mg/kg in non-disease areas, respectively. Soil Se concentrations in KBD areas were lower than that in non-disease areas, and the mean concentrations of soil Se in Tibet were lower than the average of China (0.29 mg/kg). Therefore , there is a close relationship between soil Se concentrations and KBD in Tibet. More studies should be concentrated on the impacts of Se deficiency in soils and its relationship with Se concentrations in food-grain and the human body in Tibet areas.
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Keywords
Kashin-Beck disease (KBD)
selenium (Se)
soil
Tibet
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Corresponding Author(s):
LI Shunjiang,Email:shunjiangli@163.com
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Issue Date: 05 March 2009
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