| 渔塘坝微地域高Se环境中土壤Se的分布规律及其影响因素 |
| 摘要点击 796 全文点击 1707 投稿时间：1998-03-22 |
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| 中文关键词 土壤Se 分布 影响因素 微地域 微量元素 |
| 英文关键词 selenium in soil distribution affecting factors mini-landscape trace element |
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| 中文摘要 |
| 选取迄今世界上唯一发生过人群Se中毒的湖北恩施市双河乡渔塘坝为研究区。在渔塘坝0.01km2的微地域内,土壤Se的分布存在着显着的不均一性。控制渔塘坝土壤Se分布的3个主要因素是地形,土壤粒度和成土母质的含Se量及出露情况,其中地形是最重要的控制因素。土壤Se的分布规律表明,在表生的中强化学风化环境中Se是一种极为活泼的元素,易于积累Se的负地形是最易于Se中毒发生的地貌位置。 |
| 英文摘要 |
| Yutangba was selected as the research area,which is located at Shuanghe of En'shi city in southwest of Hubei province,and is a well-known area for people suffered from selenosis.At Yutangba mini-landscape of 0.01km2,distribution of Se in soil is significantly uneven,and obviously controlled by three factors,which are topographic condition,soil-grain size and Se contents in soil forming parent material and its outcrop condition.Of them,topographic condition is the most important factor.The distribution of Se in soil indicates that Se is an active element in the supergene moderate-strong chemical weathering environment,and that lower area where Se accumulates easily are such sites where selenosis is ready to occur. |
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