Differences in the Component Content of <i>Betula </i><i>albosinensis</i> at Different Altitudes in the Shennongjia Forest Area

为探讨神农架林区红桦各部位活性成分含量差异及主要活性成分含量与海拔、土壤矿质元素以及树皮颜色之间的关系，本论文对比研究了神农架林区不同海拔红桦树不同部位的黄酮、多酚、可溶性糖和萜类化合物含量差异，并探讨了土壤矿质元素的影响，以及红桦树皮颜色与萜类化合物含量的关系。研究发现，低海拔的天燕景区红桦树皮和根中黄酮、多酚和萜类含量以及树皮和枝条中可溶性糖含量均普遍高于高海拔的温水林场，而枝条中黄酮、多酚和萜类含量则与此相反。红桦树皮萜类化合物含量与L值和ΔE值呈显著负相关。两地红桦和土壤中富含多种必需元素，且土壤与红桦样品中各元素含量具有较好的相关性。In order to explore the differences in the content of active ingredients in different parts of red birch trees in the Shennongjia forest area and the relationship between the content of main active ingredients and altitude, soil mineral elements, and bark color, this paper compared and studied the differences in the content of flavonoids, polyphenols, soluble sugars, and terpenoids in different parts of red birch trees at different altitudes in the Shennongjia forest area, and explored the influence of soil mineral elements, as well as the relationship between the color of red birch bark and the content of terpenoids. Research has found that the content of flavonoids, polyphenols, and terpenes in the bark and roots of red birch trees at low altitudes, as well as the content of soluble sugars in the bark and branches, are generally higher than those in high-altitude warm water forest farms, while the content of flavonoids, polyphenols, and terpenes in the branches is the opposite. The content of terpenoids in birch bark is significantly negatively correlated with L value and ΔE value. The red birch and soil in both places are rich in various essential elements, and there is a good correlation between the content of each element in the soil and red birch samples.