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作 者 ：戴福;李凤日;贾炜玮;陈禹

期 刊 ：植物研究 2009年 29卷 5期 页码：597-602

关键词：冠径(cd)；胸径(D)；cd/D关系；阔叶树；间伐强度；树木空间；

Keywords:crown diameter(cd), diameter at breast height(D), cd/D relationship, broadleaved, thinning regimes, tree spacing,

摘 要 ：根据帽儿山天然次生林30块标准地每木检尺的实测数据，建立帽儿山天然次生林10种主要阔叶树冠径与胸径以及胸径和冠径与胸径比值（cd/D）之间的关系，并且简要论述冠径与胸径比值在树木空间、断面积和林分密度和间伐强度的应用。研究表明：胸径在10~30 cm之间，相关系数（R²）在0.8以上时，冠径与胸径关系近似一条直线。通过对不同树种的不同大小树木(cd/D)比值的分析，得出随着胸径的增加的比值是逐渐减小的，并且减小的趋势随着胸径的增加趋于平稳，最后趋于一个常数。

Abstract:In accordance with natural secondary forest Maoershan 30 standard wood seized each foot measured data, set up Maoershan Heaven 10 kind the relationship between crown diameter and diameter at breast height and the relatianship diameter at breast height and(cd/D), this article also discusses the (cd/D) ratio in the space of trees, basal area and stand density and thinning regimes on the application. Study shows that: 10~30 cm in diameter at breast height between the correlation coefficient (R²) at 0.8 above, the relationship between crown diameter and diameter at breast height in a straight line approximation. Different species of trees of different sizes (cd/D) ratio analysis, can be seen as an increase in the ratio of diameter at breast height is gradually decreased, and the trend of decrease with the increase in height has stabilized, and finally tends to a constant.

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