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Characteristics of mineral element content of alpine vegetation in permafrost region on Qinghai-Tibetan Plateau

查看全文 作　　者：ZhaoPing [1,2]Yang;JiXi [1]Gao;Hua [2]OuYang;Hui [3]Tan 高影响力作者 机构地区：[1]Nanjing Institute of Environmental Sciences, Min&try of Environmental Protection, Nanjing, Jiangsu 210042, China;[2]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;[3]Sinosteel Maanshan Institute of Mining Research CO., L TD, Maanshan, Anhui 243000, China高影响力机构 出　　处：《Research in Cold and Arid Regions》索引2012年第4卷第1期,共6页高影响力期刊 基　　金：by National Natural Science Foundation of China (No. 31100337);National Basic Research Program of China (No. 2005CB422005) 摘　　要：The content characteristics of 16 elements(Al,Ca,Cr,Cu,Fe,K,Li,Mg,Mn,Mo,Na,Ni,P,Pb,Sr,and Zn) in 23 plant species collected from the Qinghai-Tibetan Plateau permafrost region were investigated using ICP-OES.Results show that the average contents of Ca,K,Mg,Fe and P were higher than 1,000 mg/kg,those of Al,Na,Zn and Cr ranged between 10-1,000 mg/kg and those of Cu,Li,Pb and Mo were less than 10 mg/kg.The levels of Al,Ca,K,Mg and Na were within the scope of the reported terrestrial plant element content,those of Sr,Fe and Cr were higher than the average of the terrestrial plants and the maximum content of Mn was higher than the upper limit of the reported Mn content.The main character of the element content was of the Ca>K type,however,in terms of Cyperaceae species the element content character was K>Ca type.The contents of Ca,Li,Mg and Sr in Gramineae and Cyperaceae species were higher than those in other species and the contents of Ca,K,Mg,Fe,P,Al and Na in all collected plants were higher than those of other elements.Zn had weak variability with the lowest coefficient(i.e.,7.81%),while other elements had strong variability.The ratio of maximum content to minimum content indicated Ca and K had less change than other elements in the Qinghai-Tibetan Plateau permafrost region.Element content of alpine vegetation in the Qinghai-Tibetan Plateau permafrost region mainly shows a positive correlation,among which the correlation coefficient between Al and Pb,Al and Fe,Mo and Cr,Pb and Fe,Sr and Li were higher than 0.9,and negative correlation had no statistical significance.The correlation between Al and Fe,Mg,Mn in the Qinghai-Tibetan Plateau permafrost region were consistent with that reported in Kunlun Mountains. 关 键 词：高原多年冻土区 植物元素含量 青藏高原 高寒植被 特征 ICP-OES 矿物 高原冻土地区
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