猫儿山自然保护区岩土-植物地球化学特征及其生态关系

猫儿山自然保护区母质岩石主要为仡岗岩．该区气候、土壤及植物垂直分带明显．相对于生命物质，植物中主要元素富K，Ca，Mg，Fe，P而贫Na，多数微量元素的含量都超过了一个其相应的数量级别，这同本区花岗岩及其矿化的地质条件和土壤中多数元素的地球化学高背景密切相关．从山体往下植物中元素K，Na，Ca，Au，Co和Ni含量降低，而Fe，Mn，W，Sn，Bi，Sb和Ag含量增高，与不同土壤分带中元素含量的变化趋势相似．植物中元素之问的相关和聚类特征，表明其元素的共生关系同花岗岩及其有关矿床中的元素组合具有内在的同一性．按植物对元素积聚系数k值大小可将元素分为强积聚型、一般积聚型和弱积聚型．土壤中明显富集的元素其k值小；明显贫化的元素其k值反而大．

Geochemical Characteristics of the Rock,Soil and Plant and Their Zoology Connection in the Maoershan Nature Protect Area

Mother rock in Maoershan nature protection area is granite.The climate,soil and plant in the vertical zone are typical.The plants are rich in K,Ca,K,Ca,Mg,Fe,P but poor in Na.The content of most microelements exceeds one order of magnitude compared to life matter,closely related to the granite and its mineralized geologic condition,and the high geochemical background of most elements in soil.Content of K,Na,Ca,Au,Co,Ni decreases,and that of Fe,Mn,W,Sn,Bi,Sb,Ag increases in plants from the mountain top to the foot.The variance trend is similar to the one of elements content in different soil zone.In plants the characteristics of correlation and clustering among elements indicate that there is inherent consistence between the element paragenic connection and element combination in the granite and mineralized form.According to the vegetal accumulation coefficient(k),the elements can be divided into three types with strong,general and weak accumulation.There is less value k in soil with obviously rich elements,while more value in soil with obviously poor elements.