| 西藏土壤中汞的含量及其地理分布 |
| 摘要点击 1853 全文点击 1792 修订日期：1993-10-08 |
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| 中文关键词 汞 土壤 西藏 地理分布 |
| 英文关键词 mercury soil Tibet |
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| 中文摘要 |
| 分析了采自西藏地区205个样品的土壤含汞量,并用数理统计方法和微机进行了数据的存入和有关计算。研究结果表明,西藏土壤中汞的含量为0.021mg/kg,明显低于全国0.040mg/kg的平均水平。西藏土壤中汞的含量呈由东(南)-西(北)逐渐降低的总趋势,这与西藏植被和土壤地带性的演替变化方向一致。亚东地区土壤垂直带谱中土壤汞的含量随海拔高度的升高而下降。汞的含量与土壤的基本属性密切相关,有着向土壤有机质、土壤粘粒富集的趋势。 |
| 英文摘要 |
| Samples of soil were taken from different sites in Tibet and analysed for their levels of mercury in soil.The data obtained were processed by using a method for mathematical programming statistics on a microcomputer and making some related computations.The results show that the average level of mercury in soils from Tibet was 0.021mg/kg and significantly lower than the average national level of 0.04 mg/kg.The level of mercury in soil was distributed in Tibet with a total trend of gradually decreasing from the southeast to the northwest that was consistent with the direction of changes in the zonal successions of vegetation and soil in Tibet.The level of mercury was closely related to the basic attributes of soil and mercury tends to be concentrated upto the organic matter and glutinous grains of soil. |
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