摘要
在西双版纳南坡铜矿,对矿区和背景区不同土层及其附近生长的几种植物不同器官的样品进行了测试和研究。该区成土过程中存在的富铝化作用,使铁、铝氧化物在土壤中聚集和Si、Ca、Mg、Na等多数微量元素发生不同程度的淋溶。土壤异常元素组合为Ag、Cu、As、Pb、W、Hg(Zn、Bi);植物异常元素组合为Ag、Pb、Cu、As、Hg、Bi、(Zn、W、Mo、B)。无论是矿区还是背景区,植物中Si、Ti、Al、Fe、P、(Cl)及Cu、Pb、Ag、Co、Ni、Cr、As、Hg、Cd、Bi主要分配于根部特别是细根,Mg、Mn、S、K、Na及B、V、Mo、Zn主要分配于叶及细枝。高衬度土壤异常的毒性元素(Ag、Cu、As、Pb、W、Hg等)其生物吸收系数比背景区减小,植物对其吸收是"有障的";而矿区土壤中含量较低的元素(Fe、Mn、Ca、K、Na等)以及一些仅形成低衬度植物异常的营养性元素(B、Mo、Zn等),其吸收系数比背景区增大,植物对其吸收是"无障的"或"半无障的"。植物中的营养元素具有强烈的向地上器官的转移倾向;而多数毒性元素向地上器官转移倾向较弱。
In the Nanpuo copper mine of Xishuangbanna, Different organs of some plants growing on or near the different soil layers of the mining area and its background area, have been analyzed and studied. Due to the allitization existing in soil forming process of the mining area, iron -aluminium oxide gather in soil, and Si, Ca, Mg, Na and most trace elements,etc, eluviate in vari- ous degree . Element combination of soil anomaly includes Ag, Cu, As, Pb, W, Hg, （Zn, Bi） etc. , and element combination of vegeation anomaly includes Ag, Pb, Cu, As, Hg, Bi,（Zn, W, Mo, B） etc..Si, Ti, Al, Fe, P,（C1）,Cu, Pb, Ag, Co, Ni, Cr, As, Hg, Cd, Bi in plants are most rich in root, especially in rootlet, and Mg, Mn, S, K, Na, B, V, Mo, Zn in plants are most rich in leaf and thin twig, no matter in the mining area or background area. Toxic elements （Ag, Cu, As, Pb, W, Hg etc. ） of high contrast soil anomaly have smaller biological coefficient than that of the background area, for plants absorb them with a barrier. Elements with little content in soil of the mineralized area （ Fe, Mn, Ca, K, Na etc. ） and some nourishing elements only forming low contrast vegeta- tion anomaly （ B, Mo, Zn etc. ） ,have greater biological absorption coefficient than that of the background area, for plants absorb them without barrier or half barrier. The nourishing elements in plants have a strong tendency to transfer to upper organ, while most strong toxic elements in plants has a weaker tendency to transfer to upper organ.
出处
《矿产勘查》
2011年第4期396-403,共8页
Mineral Exploration
基金
国家自然科学基金项目(编号:40873030
40972220)
广西地质工程重点实验室基金项目(编号:桂科能07109011-Z008)资助
关键词
元素分布
元素迁移
土壤-植物系统
西双版纳
南坡铜矿
distribution of elements
migration of element
soil - plant system
Nanpo copper mine
Xishuangbanna
