【摘要】 用原子吸收、火焰光度、比浊、比色以及滴定等分析方法,测定了太白山北坡各植被垂直带主要建群种和一些优势种植物叶内氮、磷、钾、钙、镁、硫、铁、锰、锌、铜、硼、氯等元素。同时测定了上述植物生长的各类土壤中有效态元素含量。计算了叶内相关元素的比值以及植物吸收系数。讨论了土壤因素对叶内元素含量的影响。结果表明,这里的植物种类虽然繁多,生理特性各有不同,环境因素影响复杂,而植物叶内每种元素含量则有一定范围,元素间又有一定比值关系,维持着植物的正常生长和发育,这就是植物元素背景值获得的主要依据。更多还原

【Abstract】 The Taibai mountain is a part of the Qinling mountains range, which isone of the famous mountains in our country. The summit of which is morethan 3767m. above sea level, mountain range is abrupt, whereabout climate isvarious, and vegetation vertical zone is obvious, natural environment is kepthold of integrity, which is one ideal place for study of environmentbackground values. We collected constructive and dominant species plants ofvegetation vertical zone, and dug out the community soil profile. The contentsof N, P, K, Ca, Mg, Cu, Zn, Fe, Mb, S, Cl, B, etc. in samples of plants andsoil were measured by means of physical and chemical methods. In themeantime, we investigated the relation between effective element in soils andplants, and calculated the absorbing coefficient of plants correlativity of pH.value in soil. According to above result of study, the plant element back-ground values of the Taibai mountain were obtained. We considered that inthe natural environment condition element of plants is stable fundamently.Among the elements there are specific ratid, therefore, the average elementcontents may be considered as the element background value of plants.更多还原