渝产独活中重金属含量分布特征及富集特性

Distribution and Enrichment of Heavy Metals in Angelica pubescens Maxim. f. Biserrata Shan et Yuan from Chongqing

对重庆独活种植地土壤及植株中重金属Cu、Pb、Cd、Hg和As进行含量检测、分析。结果表明独活种植地土壤及药材中重金属Cd含量超标。不同器官中重金属元素的含量分布规律不一致,Pb与Cd分布为根>茎>叶,Cu为茎>根>叶,Hg为茎>叶>根,As含量为叶>根>茎。独活根、茎对Cd的富集能力最强,富集系数大于1,其它元素富集系数均小于1。相关分析表明,土壤中Cu与茎、叶中Cu含量存在极显著相关性,茎和叶中Cu含量呈显著负相关,茎和根中Hg含量呈极显著正相关。

The contents of heavy metals （ Cu, Pb, Cd, Hg and As） in Angelica pubescensMaxim, f. Biserrata Shan et Yuan and soil from Chongqing were measured and studied. The results showed that Cd content in soil was exceeded the stand- ard of Environmental quality standard for soils （ GB15618-1995 ） and that in Angelicaepubescentis radix was exceeded the standard of Green standards of medicinal plants and preparations for foreign trade and economy（WM/T2-2004）. The dis- tribution was different among organs, the content of Pb and Cd showed the orders of root 〉 stem 〉 leaf, that of Cu was stem 〉 root 〉 leaf, that of Hg was stem 〉 leaf 〉 root, and that of As was leaf 〉 root 〉 stem. The enrichment capability of Cd was the best in root and stem, and the bioconcentration factors of Cd were both higher than 1, and the bioconcentration factors of other elements were lower than 1. The correlation analysis showed that there was extremely significant correla- tion between the Cu content in soil and that in stem and leaf, there was significant negative correlation between the Cu content in stem and in leaf. there was significant positive correlation between the He content in stem and in root.