从Zn/Cd值研究北京地区土壤中镉的富集与淋失

本文利用土壤中Zn/Cd值的变化探讨了北京地区表层土壤中镉的富集、淋失分异状况及其原因。北京地区土壤中Zn/Cd值变化幅度较大,反映出镉在土壤中相对富集与淋失的差异较大。在平原潮土区镉明显富集,可能与碳駿盐含量和土壤质地有关;在山前平原褐土区则相对淋失,这可能与成土母质和成土过程有关。

The Enrichment of Cadmium and Its Leaching Logs in Soils of Beijing Area with a View to the Relationship between Zn and Cd

In this article, the author intends to discuss the variations of enrichment and leaching loss in surface soils of Beijing area and the causes of these variations with a view to the relation of Zn/Cd values in soils. The range of Zn/Cd is so wide that it can reflect the difference in relative enrichment and leaching loss of Cd in soils. The relative enrichment of Cd in moisture soil is apparent in plain area, while the relative leaching loss of Cd in drab soil is obvious in the plain in front of the mountains. The reasons why the variations exist have been explored in this article.