摘要
The method to determine the maximum density line of self-thinning is discussed and a self-thinning model is developed by using long term observed data of spacing study plots. According to traditional method, the slope of the maximum density line was result of average, which was determined by different stand sites and densities Therefore the slope determined by the previolls inethod poorly describes the sclf-thinning procedure of the maximum density stand. The self-thinning line (NDg curve) of plantation is reverse sigmoid, which can be simulated by modified Korf equation. It is concluded that the minimum asymptotic number of trees (Nmin) of self-thinning in plantation are positively correlated with initial density (N0), While curve shape is related to site and initial density,
The method to determine the maximum density line of self-thinning is discussed and a self-thinning model is developed by using long term observed data of spacing study plots. According to traditional method, the slope of the maximum density line was result of average, which was determined by different stand sites and densities Therefore the slope determined by the previolls inethod poorly describes the sclf-thinning procedure of the maximum density stand. The self-thinning line (NDg curve) of plantation is reverse sigmoid, which can be simulated by modified Korf equation. It is concluded that the minimum asymptotic number of trees (Nmin) of self-thinning in plantation are positively correlated with initial density (N0), While curve shape is related to site and initial density,
