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从化学元素生物学和地球化学分类的角度，分析了大量营养元素、必需微量元素、可能必需元素、非必需元素和有毒元素在岳桦（Ｂｅｔｕｌａｅｒｍａｎｉ）体内的含量特征和变化规律。结果表明：大量营养元素在岳桦体内的含量高于其它几类元素的含量；在新陈代谢旺盛的叶片中各类型元素含量均高于其它器官；化学性质和地球化学性质相近、生物学功能相似的大量营养元素和必需微量元素在岳桦不同器官中的含量变化具有相似的规律；其它三种类型的元素变化无规律可循，表明植物所必需的元素在植物体内的变化是按一定规律进行的；在不受人为因素干扰的情况下，它们之间处于相对平衡状态。
From the perspective of chemical elemental biology and geochemical classification, the contents and variations of macronutrients, essential trace elements, possible essential elements, nonessential elements and toxic elements in Betula ermanii were analyzed. The results showed that the content of macronutrients was higher than that of other kinds of elements in the body of Betula albosine. The contents of all kinds of elements in the leaves with high metabolism were higher than those in other organs. The chemical and geochemical properties were similar and their biological functions were similar The content of macronutrients and essential trace elements in different organs of Betula ermanii had a similar pattern. The other three types of elements changed irregularly, indicating that the changes of plant essential elements in plants were carried out according to a certain rule ; In the case of interference from human factors, they are in a state of relative balance.