青藏高原多年冻土区高寒草甸植物群落主要植物化学元素含量特征  

Studies on the Characteristic of Element Content of Main Plant Species in Alpine Meadow community in Permafrost Region of Qinghai Tibet Plateau

作　　者：马海[1] 周国英[1] 李天才[1] 张淑玲[1] 韩有吉[1] 徐文华[1] 陈桂琛[1] 

机构地区：[1]中国科学院西北高原生物研究所

出　　处：《广东微量元素科学》2007年第2期17-22,共6页Trace Elements Science

基　　金：中国科学院知识创新工程重大项目(KZCX1-SW-04);中国科学院"西部之光"人才培养项目"青藏铁路高海拔地区植物繁育及其栽培技术研究"资助

摘　　要：分析了青藏高原北麓河地区29种高寒植物15个元素含量的特征。结果表明,这些植物中元素平均含量>400μg/g的元素有Ca,Mg,Na,K,Fe,10～100μg/g的有Mn,Cr,Zn,Cu,<10μg/g的有Ni,Co,As,Pb,Cd,Hg;种间同种元素的含量变化规律不统一。相关性分析表明,Cu与Cd,Fe与Cd和Hg,Cr与Ni,Co和Mg极显著正相关,Cr和Ca极显著负相关;聚类分析表明,Na,As元素对本区植物聚类的影响最大,莎草科、禾本科、菊科科内植物元素含量相似。The characteristics of the content of 15 elements in 29 plant species collected from Beiluhe area of Qinghai - Tibet Plateau were investigated. The results showed that average content of Ca, Mg, Na, K and Fe was higher than 400 μg/g, that of Mn, Cr, Zn and Cu ranged between 10 and 100 μg/g, and that of Ni, Co, As, Pb, Cd and Hg was less than 10 μg/g. The variation of same clement content among different species was not consistent. The analysis of relativity demonstrated that the correlation between elements of Cu and Cd, Fe and Hg, Cd, Cr and Ni, Co and Mg were positive significantly; Cr and Ca was negative significantly. The analysis of clustering demonstrated that the clustering in this region was affected largely by Na and As; the element content of plant species of those families that were Cyperaceae, Gramineae and Compositae was similar in family.

关 键 词：青藏铁路 北麓河 高寒草甸 植物群落 

分 类 号：Q946.91[生物学—植物学]