To research the dynamics of Toona ciliata Roem population in Qizimeishan Mountain,diameter classes of T.ciliata plants were transformed into according age classes;numeral dynamics of the plants in different age classes were analyzed;a static life table was made;curves of survival rate,death rate and vanishing index were drawn;and a spectral analysis of the population was conducted.The research indicates that the population is in growth form,as dynamics index Vpi was 32.32％;and Vpi' was 4.039％ when stress considered;and the sensitiveness value was comparatively high.The survival curve conforms approximately to that of Deevey Ⅱ,illustrating a general equivalence of death rate in different age classes,qx and Kx surge to peaks in 1,4 and 6 age classes simultaneously,showing that the physiological features at different growing stages,environmental sieves and human disturbances all influence the T.ciliata population.In spectral analysis of the population,the fundamental wave A,is 0.752 8,while A3 has an obvious minor cycle deviating from that of A1,demonstrating a periodicity in natural regeneration of T.ciliata population,with multi-harmonic wave superposition of minor cycles.
Toona ciliata Roempopulation dynamicsspectral analysisQizimenshan Mountains
NETL
NSTL
维普
万方数据
