天水小陇山锐齿栎群落动态分析

Analysis of Age Structure of Quercus aliena var. acuteserata Communityin Xiaolong Mountain

以植被样地调查和树木径级数据为依据，采用空间代替时间法论述了现存锐齿栎群落各种群年龄结构特征，结果显示小陇山锐齿烁种群年龄结构可表示为增长型、稳定型和衰退型三类，在自然状态下，该群落为进展演替；分析了导致森林衰退的原因。

This paper deals with the structure and dynamics of Qurcus aloema var.acutewrata communityin Xiaolong mountain of Tinnshui.The results are as follows:1.The age structures are classfied into growing,stationary and senescent types.2.Along with the development of population and succession,the age structure changes mainlyfrom the growing to stationary type。3.Senescence cause of the forests is given in the end of the paper.