【摘要】 采用超总体理论编制朝阳市油松、刺槐、杨柳、速生杨4个树种组林分平均胸径生长率通用模型,以2005年森林资源二类调查资料为原始数据,涵盖全市所有地区不同地理位置和不同立地条件的生长水平.建立4种模拟方程,通过拟合与优化及结果精度的检验,选择出各树种组的平均胸径生长率模型.更多还原

【Abstract】 Using superpopulation theory,an stand average DBH growth rate model of the four tree groups,namely,Chinese pine,black locust,poplar and willow,and fast-growing poplar in Chaoyang city is compiled.Based on the forest resource inventory data in 2005,this model includes all tree groups growth level in different geographic location and site conditions in Chaoyang.Four model equations are built through fitting,optimizing and results checking,the average DBH growth rate model of tree groups is summarized.更多还原