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应用主分量分析与聚类分析技术， 测定鼎湖山黄果厚壳桂群落不同种群的养分相似性， 并探讨了植物不同器官作为相似性测度的合理性。并认为， 茎叶较适于作为相似性测试的取样部位。测定结果表明， 主分量分析与聚类分析对茎叶样本的测定结果具有一致性， 在主分量分析中， 茎第一排序轴主要反映Ｎ、Ｐ和Ｋ 元素， 叶第一排序轴主要反映Ｋ和Ｍｇ 元素。上层乔木叶子具有较大的相似性， 下层种双盖蕨、柏拉木与薄叶梧桐的叶子具有独特的养分特征， 黄果厚壳桂不同层次的个体具有相似的特征， 即种内的不同层次个体的差别不大。双盖蕨与柏拉木的茎样与其它种最不相似， 它与叶子的测定结果相一致。黄果厚壳桂不同层次个体的茎互不相似， 反映出不同木质化程度产生的营养含量上的差异。聚类分析显示， 处于上层的荷木、椎栗与华润楠的茎最为相似， 它们与一、二层的黄果厚壳桂及鼎湖钓樟则在较高水平上聚合， 亦即相似性稍小， 但与其它种（ 或个体） 相比， 这５ 个种是较为相似的。
The principal components analysis and clustering analysis were used to determine the nutrient similarity of different populations of C. huangui in Dinghushan and to explore the rationality of different organs of plants as similarity measures. And that the stems and leaves more suitable as a similarity test sampling site. The results of principal component analysis and cluster analysis showed that the results of principal component analysis and cluster analysis were in agreement with each other. In the principal component analysis, the first order axis of stems mainly reflected N, P and K elements. The first order axis of leaf mainly reflected K And Mg element. The leaves of the upper arborvitae had greater similarities. The leaves of the lower cauliflora, the blueberry and the bluegrass had unique nutrient characteristics. The individuals at different levels had the similar characteristics, ie, the individuals at different levels within the species Little difference. The stems of the double-cap fern and the blueberry are the most dissimilar to the other species, which is consistent with the determination of the leaves. The stems of the individuals of different layers of Huangguo were different from each other, reflecting the differences in the nutrient content of different degrees of lignification. Cluster analysis showed that in the upper layer, the stems of Lycium chinense, Ziziphus chuanxiong and Chinese rhododendron were the most similar, they were aggregated with the first and second layers of the yellow carapace and the camphor of Dinghu at a higher level, that is, the similarity was slightly smaller , But compared with other species (or individuals), these five species are more similar.