青藏高原不同草地类型苔藓植物化学元素特征  

Chemical Element Characteristics of Moss from Different Alpine Meadows of Qinghai-Tibet Plateau

作　　者：金艳霞[1,2] 周华坤[1] 赵新全[1] 陈哲[1,2] 姚步青[1] 付京晶[1,2] 温军[1,2] 李天才[1] 

机构地区：[1]中国科学院西北高原生物研究所,青海西宁810001 [2]中国科学院研究生院,北京100049

出　　处：《草地学报》2013年第1期65-72,共8页Acta Agrestia Sinica

基　　金：国家重点基础研究发展计划(973计划)课题(2009CB421102);国家自然科学基金项目(41030105)(31172247);中科院战略性先导科技专项子课题(XDA05070202);国家科技支撑课题专题(2011BAC09B06-02)资助

摘　　要：为探讨青藏高原地区苔藓植物对重金属元素的积累状况,在海北站和三江源站的灌丛及草甸采集苔藓植物样品,利用原子吸收光谱仪法(AAS)测定了这些苔藓植物体内19种化学元素的含量。结果表明:青藏高原海北和果洛的苔藓植物体内重金属元素Hg,Cd,Zn和Cr的含量不仅高于国内的贡嘎山原始森林地带,也高于国外的意大利、芬兰、挪威等地区;海北的沼泽化草甸和金露梅(Potentila fruticosa)灌丛草甸,以及果洛的嵩草(Kobresia humilis)草甸和金露梅灌丛草甸的苔藓植物中化学元素的积累有明显差异。如除了K元素外,Ca和Mg元素在海北草甸苔藓体内的含量略高于果洛草甸。此外,苔藓植物体内Cd-Co,Cd-Ni,Cu-Se等元素间存在显著正相关关系。In this study, moss samples were collected from the shrubs and meadows of Haibei station and＂ Three-River Headwaters station to explore moss accumulation capacity of heavy metals on Qinghai-Tibet Plateau. Nineteen elements in these moss samples were analyzed by means of the Atomic Absorption Spec- trometry. Results of statistical analysis showed that the enrichment concentration of heavy metal elements such as Hg, Cd, Zn, C was higher than samples from Gongga montain forests, especially higher than samples from similar areas of Italy, Finland, and Norway. The enrichment concentration of chemical ele- ments had significant diffexence between alpine meadow of Potentila fruticosa in Haibei and Kobresia hu- mills in Guoluo. In addition, these results also showed that there were significant positive correlations be- tween Cd and Co, Cd and Ni, Cu and Se in tested moss samples.

关 键 词：苔藓植物 青藏高原 草甸 化学元素含量 

分 类 号：Q949.35[生物学—植物学] X171[环境科学与工程—环境科学]