摘要
以形数作为树干的干形指标,利用197株落叶松解析木材料,研究分析了树干干形的变化规律,结果表明,胸高形数与实验形数都随着直径和干高的变化而变动。但胸高形数的变动幅度要比实验形数的变动幅度大得多。其胸高形数的变动幅度为0 44～0 59,实验形数的变动幅度为0 38～0 42。
Taking form-factor as the index of trunk shape, the variation patterns of trunk shape were studied and analyzed using the data of stem analysis of 197 larch trees. The results demonstrated that both form-factor of breast height and form-factor of experiment height varied with the variation of diameter and trunk height. However, the variation range of the former was larger than that of the latter. The variation range of form-factor of breast height was from 0.44 to 0.59, and that of experiment height was from 0.38 to 0.42.
出处
《河北林果研究》
2004年第2期126-129,共4页
Hebei Journal of Forestry and Orchard Research
关键词
胸高直径
干形
形数
落叶松
diameter at breast height
trunk shape
form-factor
larch
