立地条件对杉木生长过程的影响

Effects of Site on Growth of Chinese Fir

本文结合基层杉木材林业生产实际，提出以土壤厚度作为其划分立地类型的依据；对杉木树高、胸径和材积生长进行数学方程拟合；分析立地对其方程参数变化及各生长项目的总生长量、连年生长量、平均生长量所产生的影响，并应用Ｄ、Ｈ、及ＤＨ有序样本对杉木生长进行了生长阶段的划分．

Based on forestry practices, according to our management experiences,we suggested to take soil thickness as the index of site classification, analysed the relation of H-growth to time, DBH-growth to time and V-growth to time by means of regressive equation, discussed the effects of site on the total increment,the current annual increment and the mean annual increment of height, DBH and volume, and divided the growing process of Chinese fir into 4 stages by means of clustering method for ordered samples.