长白山3个主要针叶树种的标准树高曲线

Generalized Height-Diameter Models for Three Main Coniferous Trees Species in Changbai Mountain

树高和胸径是森林调查中重要的测量因子,常用来计算材积、立地指数和其他与森林生长和收获、演替和碳汇相关的重要变量（Dorado et al.,2006）。树木胸径可以快速、方便且准确的测量，而树高的测量费时费力。在森林调查时，常常只测量部分树木的树高，缺失的树高则通过不同树种的树高曲线来预测（S6nehez—Gonzalez et al．，2007）。

The study of height-diameter model is a basic research in forest growth and yield modeling. 1 139 individual trees in Wangqing Forest Bureau,Jilin Province were used in this study to develop the generalized height-diameter models. PROC NLIN in SAS was used to develop ten generalized height-diameter models,and PROC GLM was used to estimate the error of each models. The function with the highest R2,lowest RMSE,and relatively fewer parameters was chosen as the optimal generalized height-diameter model. We found that the function（9） H = 1. 3 ＋ a1H0^a2（1-exp（-a3 SPH^a4D）） ^a5（where H is height,D is diameter,H0 is dominant height,SPH is number of individuals in the stand,a1,a2,a3,a4 and a5 are parameters specific to species） ,which was based on Richards function,could calibrate the relationship between height and diameter best for the main coniferous tree species fir,spruce,and korean pine. In addition,we compared the accuracy between the optimal generalized height-diameter model and the optimal local heightdiameter model. Results indicated that,with including stand variables,the optimal generalized height-diameter model is more accurate.