摘要
利用450株桦树标准木和63株落叶松标准木材料对林木的干形进行了研究,旨在探索林木干形的变化规律,为林木材积的测算提供理论依据。结果表明,林木的各干形指标均因径阶的不同而不同,并且胸高形数和胸高形率均随直径的增大而又变小的趋势。
The stem-shape have been studied using 150 sampling trees of Betula platyphyla Suk and 63 sampling trees of Lar/x in the paper and search for changing of stem - shape of trees. The results showed the different of all stem - shape - index with diameter class. The breast - height form factor and the breast - height factor quotient change small with changing large of diameter.
出处
《河北林果研究》
2007年第3期247-251,共5页
Hebei Journal of Forestry and Orchard Research
关键词
干形指标
落叶松
桦树
stem shape indix
larix
Betula platyphylla Suk
