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该文在河北省范围内调查片状和带状毛白杨林分标准地 14 9块 ,研究林分平均胸径、平均高、胸高断面积、蓄积等主要林分因子的生长情况 ,并建立了主要因子的生长模型和相关关系模型 ,可用于毛白杨林分生长预测和评估
In this paper, 14 9 patchy and banded Populus tomentosa forests were surveyed in Hebei Province to study the growth of major stand factors such as mean DBH, average height, area and area of chest height, and so on. Growth models and correlation models of factors can be used to predict and assess Populus tomentosa growth