安徽皇藏峪自然保护区南京椴种群结构分析

Analysis on structure of Tilia miqueliana population in Huangcangyu Nature Reserve of Anhui Province

在野外样方调查基础上,根据径级结构、静态生命表、存活曲线和死亡曲线,探讨了安徽皇藏峪自然保护区内南京椴(Tilia miqueliana Maxim.)种群的动态变化规律及更新方式。结果表明,该种群的径级结构呈倒金字塔型,为衰退型种群;种群的存活曲线为DeeveyⅢ型曲线,幼树死亡率较高,苗期种群不稳定;其更新方式主要为实生苗和萌蘖,其中萌蘖是维持种群个体数量的主要方式。

Based on quadrat investigation,the dynamic changes and regeneration modes of Tilia miqueliana Maxim.population in Huangcangyu Nature Reserve of Anhui Province were studied according to population structure of diameter class,static life table,survival and death curves.The results showed that the structure of diameter class of T.miqueliana population appeared the inverted pyramid,and the population was declining with the survival curve of DeeveyⅢ and was unstable at seedling stage with a high death rate of saplings.The regeneration modes of the population were seed germination and asexual reproduction（sprouting）,and the asexual reproduction played an important role in keeping population size.