Study on the Dynamics of the Endangered Plant Population of Tsuga tchekiangensis

Based on the life table of population　and the theory of survrival analysis,the authors worked out a static life table of Tsuga tchekiangensis,drew the curves of mortality rate,survival rate,killing value,survival rate function,mortality density function,cumulative mortality rate and hazard rate function,and analyzed the life process of population.The results showed that the population had one valley of morality,and the survival curve of the population trend to the type of Deevey Ⅱ.Then spectral analysis of the population dynamics of T.tchekiangensis was made,which showed that there was not a marked regularity of periodic fluctuation in the process of natural regeneration of T.tchekiangensis.