| 紫阳富硒区土壤中的硒 |
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| 引用本文： | 赵成义,任景华,薛澄泽.紫阳富硒区土壤中的硒[J].土壤学报,1993,30(3):253-259. |
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| 作者姓名： | 赵成义 任景华 薛澄泽 |
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| 作者单位： | 中国科学院新疆地理所, 830011;西北农业大学环保室;西北农业大学环保室 |
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| 摘 要： |
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| 关 键 词： | 硒 分布 紫阳富硒区 土壤 |
SELENIUM IN SOILS OF SELENIUM-RICH AREAS IN ZIYANG COUNTY |
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| Zhao Chengyi,Ren Jinghua and Xue Chengze.SELENIUM IN SOILS OF SELENIUM-RICH AREAS IN ZIYANG COUNTY[J].Acta Pedologica Sinica,1993,30(3):253-259. |
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| Authors: | Zhao Chengyi Ren Jinghua and Xue Chengze |
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| Institution: | Xinjiang Institute of Geography, Chinese Academy of Sciences, 830011;Northwestern Agricultural University, Shaanxi Province;Northwestern Agricultural University, Shaanxi Province |
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| Abstract: | In order to find out some endemic desease in relation to environmental selenium,the content and the regular distribution of Se in soils of selenium-rich area in Ziyang county have been studied,and the relationship between the soil available Se and soil properties has been discussed.The total Se contents of soils varied with the parent material and sail-farming condition,and the average content of total Se was 0.323 mg/kg,the water-soluble Se content ranged from 0.1% to 0.9%,and the KHzP04-extracted Se from 1.1 % to 3.8%.Selenium-rich rocks and soils were found to be only distributed in the limited areas.According to the geographical distribution of Se in soils of Ziyang county,Four areas could be distinguished follows:1.selenium-toxic area,2.high-selenium area,3.medium-stlenium area,and 4.low-selenaum area.The Se content of topsoil was the highest,and it decreased with the depth progressively in the soil profile.The degrees of seven soil factors affecting the KH2PO4-extracted Se:CaCO3>silt>organic matter>clay>pH>free iron>CEC.The analytical results of the soils and plants have proved that the KH2PO4-cxtracted Se could reflect the situations of Se supplied by the soil. |
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| Keywords: | Soil selenium Distribution Availability Factor |
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