Abstract:
Based on the data about Pinus tabulaeformis population and the theory of survival analysis, the regulations of size-class and changing density of P. tabulaeformis were obtained, and the static life table, the curves of survival, cumulative mortality rate, mortality density, hazard rate and killing valuable populations were drawn. The results showed that the average density of P. tabulaeformis dropped with the increase of size-class, which reflected the negative association between density and size-class, the survival curves tended to be the type DeeveyⅡ, and the peak of mortality appeared in the stage of beginning and end.
