研究论文
王定勇,牟树森,青长乐.大气汞对土壤─植物系统汞累积的影响研究[J].环境科学学报,1998,18(2):194-198
大气汞对土壤─植物系统汞累积的影响研究
- THE EFFECT OF ATMOSPHERIC MERCURY ON THE ACCUMU LATION OF MERCUPY IN SOIL PLANT SYSTEM
- 基金项目：
- 作者
- 单位
- 王定勇
- 西南农业大学资源与环境学院, 重庆 400716
- 牟树森
- 西南农业大学资源与环境学院, 重庆 400716
- 青长乐
- 西南农业大学资源与环境学院, 重庆 400716
- 摘要：采用室内模拟试验的方法,研究了大气汞污染对土壤 植物系统的危害及其机理。结果表明,植物可吸收大气汞,也可吸收土壤汞。当植物汞源于气汞时,其地上部汞含量高于根部；源于土壤汞时,则根汞高于地上部汞。土壤汞累积的来源可通过直接吸附大气汞,也来源于植物汞的输入。
- Abstract：This paper deals with the harmfulness and the mechanism of atmospheric mercury pollution on soil plant system by using laboratory simulation experiments.The results showed that plant can intake mercury both from the air and the soil.The concentration of mercury in the shoots is higher than that in the roots when mercury is absorbed from the air, and vice versa when mercury is taken up from the soil.Mercury source accumulated in the soil may directly comes from the air, or originates from the input of plants.Mercury from the air is more easily absorbed by the soil when humus is added in the soil.By covering plastic film, mercury is effectively prevented from being absorbed by the soil.
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