南京栖霞山地区树木元素富集的初步研究

 本文用树木元素富集系数(T／S)来研究南京栖霞山铅锌多金属矿区树木—土壤系统中元素的富集特性。结果表明，树木对土壤中K、P二个元素的吸收基本与树种和开矿活动关系不大。黑松对Cr、Al，马尾松对Mn、Pb、Co、Ni、枫杨对P，刺槐对Mg、Na，Ti，栎对Zn、Ca、K、Fe、Sr、Ba、V，槐树对Cu均有最大的富集系数。黑松树龄对Co、K、Zn含量和Ca的富集系数有一定的影响。另外，Co—Ni、Sr—Ba的T／S曲线分别呈正相关，表现出这两组元素各自的地球化学共轭性。

A PRELIMINARY STUDY ON ACCUMULATION OF TREE ELEMEMTSIN MINING AREA OF XIXIA MOUNTAIN. NANJING

The accumulation ratio of element in trees. that is the ratio of the ele- ment content in trees to that in the soils(T/S). was used to analyze the acc- umulation characteristics of elements in the tree-soil system in mining area of Xixia mountain. Nanjing. The results showed that the content of K. Ca and P had little relations with the tiee species. ox human mining activities. Different tree species had the largest T/S for different elements.For exa- mple. Pinus thunbergli for Cr and Al. P. massoniana for Mn. Pb. Co and Ni. Pterocarya stenoptera for P. Robinia pseudoacacia for Cu. The age of Pinus thunbergli had some influence on the content of Co. K and Zn. and the T/S of Ca. There was a positive correlation between the T/S curves of Co and Ni. and of Sr and Ba. indicating a geochemical conjugation of these two pa- irs of elements.