林木干形变化规律的研究  

Study on the variation patterns of stem-shape of standing trees

作　　者：王君山[1] 张锁成[1] 黄婕 张景兰[1] 陈东来[1] 

机构地区：[1]河北农业大学,河北保定071000 [2]木兰围场林管局,围场068450

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

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.

关 键 词：干形指标 落叶松 桦树 

分 类 号：S758.1[农业科学—森林经理学]