猫儿山南方铁杉种群结构和动态的初步研究

A PRELIMINARY STUDY ON THE STRUCTURE AND DYNAMICS OF THE TSUGA TCHEKIANGENSIS POPULATION ON MAORSHAN MOUNTAIN

对广西猫儿山南方铁杉种群的大小结构、存活曲线和水平分布格局及动态进行研究 ,结果表明 :猫儿山南方铁杉种群在森林群落中繁殖能力约在 1 0 0年前开始严重衰退 ,现存个体大小级结构中体现了由增长型变化为衰退型的过程 ;整个南方铁杉种群水平分布格局为集群分布 ,但不同大小级的水平分布格局呈现集群分布演变为均匀分布和poisson分布的规律 ,猫儿山南方铁杉种群自然繁殖能力已不足以维持种群的更新 。

The structure,existing curve,level distribution pattern and dynamics of the Tsuga tchekiangensis population on Maorshan Mountain in Guangxi are studied. The result shows that the reproduction capacity of the Tsuga tchekiangensis have begun to decrease seriously since 100 years ago. Now the size class structure of Tsuga tchekiangensis are changing from increasing to decreasing pattern. The level distribution pattern of the whole population of Tsuga tchekiangensis is clumped pattern,but different sizes of them tend to be a uniform pattern or a poisson pattern. The reproduction capacity of the Tsuga tchekiangensis population on Maorshan Mountain is very weak. It can't have a change for the better for Tsuga tchekiangensis population. All kinds of saving tree methods are sought. Maybe improving the reproduction capacity of the tree is the key way.