杉木人工林自然稀疏规律研究

Based on density theory of plant growth and related biological hypothesis, a theoretical model describing the whole change process of plant population density was derived, i.e. \%N\%=exp(\%a\%ln\+2\%v+b\%ln\%v+c\%), where \%N\% and \%v\% represent population density and mean volume of a plant, and \%a,b,c\% are parameters. Thereby, the authors proposed a self\|thinning mechanism model which can be used in different sites and different growth stages of Chinese fir plantation, the model was described as \%N\%=exp(5 895932H 0 01351034 -0 9225263H -0 002829299\}ln\%v\%-0 1148481H -0 01018257\}ln\+2\%v\%).The simulating result showed that the mechanism model fitted the data observed from Chinese fir plantation very well. Therefore it is very useful in practice, which will provide a scientific basis for sustainable management of Chinese fir plantation.