赤水桫椤保护区桫椤种群特征

The research on characteristics of Alsophila spinulosa population in Chishui

在野外调查工作的基础上,通过对14个样地资料的分析,研究桫椤种群的空间分布、年龄结构,确定其空间格局类型和年龄等级,编制其静态生命表,进而绘制出桫椤种群的分布图和存活曲线图,以期弄清桫椤种群特征的动态变化,从而确定影响种群特征的因子。通过分析指出水分与热量条件是对桫椤种群特征影响最大的因子,进而提出相应的措施,期望促进对桫椤的管理,实现其有效保护。

Based on field work, this paper, by analysing 14 sample plots, researches on spatial distribution and age structure of Alsophila spinulosa population, sets up its distributive types and age classes, makes out its static life table, and further draws its distribution and survivorship curve in order to clarify motive changes of characteristics of Alsophila spinulosa population and to figure out the factors effecting characteristics of Alsophila spinulosa population. Through the analyse, this paper points out that water and heat are the main influencing factors and gives some advice on the management and protection of Alsophila spinulosa.