香果树主要金属元素分布及其与土壤养分之间的关系

在对大盘山自然保护区香果树群落进行详细实地踏查的基础上，选择香果树分布比较典型的4块样地对原生土壤和植物体各部分进行取样，研究香果树体内主要金属元素分布及其与土壤养分之间的关系。结果表明：（1）不同样地的土壤中金属含量除K、Fe、Ni、Sb、Cr有所差异，而其余的元素之间的差异均未达到显著水平（P〈0．05）；（2）香果树不同器官中元素含量的变化趋势基本一致：大量元素在根、茎、皮、叶中含量均为K〉Ca〉Mg；微量元素Fe在根、茎、皮、叶中含量最高，Cu最低；非必需元素Sb在根、茎、皮、叶中含量最高，Tl最低；（3）整体来看，香果树不同器官中元素之间的相关性均较小，表现出相互独立性。（4）富集系数以Th、K、Ca和Mg较高，其次为Tl、Cu、Ba、Cr、Sb、Zn和Ni，Fe和Mn为最低。

Element Distribution and Its Relationship with Soil Nutrients in Different Communities of Emmenopterys henryi

Emmenopterys protective wild plants. It henry/, an endemic species in China, is one of the Chinese national second is a particular rare, highly severe endangered and protective plant. The biodiversity conservation of E. henry/is timely needed. There were not significant differences of element content among different plots except K,Fe,Ni,Sb,Cr. The content of k,Ca and Mg were higher in macroelement. The content of Fe was highest in microelement, while Cu was lowest. The content of Sb was highest in noessential element, while TI was lowest. The relativities among the metal elements were all quite low in different organs. The coeffient of enrichment was Th 〉 K 〉 Ca 〉 Mg 〉 Tl 〉 Cu 〉 Ba 〉 Cr 〉 Sb 〉 Zn 〉Ni〉Fe 〉Mn.