A Study on Growth Model for Larix olgensis Plantation

Based on the data of permanent plots in Mengjiangang Forest Farm, Jingshanjiao Forest Farm of Heilongjiang Province and of some circular branch-analysis plots in Songjianghe area of Jilin Province, the self-thinning model and basal area growth model were derived for larch plantation.The whole stand model system, set up in this research, was composed of 4 compatible models, i.e.the self-thinning model, prediction model of height-diameter curve, stand basal area growth model, Schumacher’s stand yield model.Using the model system, quadratic mean diameter, mean height, the number of surviving trees per hectare, stand basal area, and stand volume can be evaluated for various levels of initial density and different sites.