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中文摘要：
通过幂指数函数的对数模型lgH=a＋blgD，分析刨花楠树高H与胸径D，以及与0．25H，0．5H，0．75H处直径（D）之间的关系，a和b为常数．结果表明：在刨花楠不同生长阶段其异速生长指数存在显著差异，异速生长指数随着胸径的增长而减小，而且树高与不同高度处直径之间的异速生长指数随着高度的增加而减小．植物异速生长是当前生态学研究的一个热点问题，而植物树高与胸径的关系又是异速生长研究的一个重点．本研究表明不存在一个普适的植物树高与胸径之间的关系，其指数应当随着植物的生长过程而系统减小．
英文摘要：
The relationships between Machilus＇ height （H） and diameter at breast （D）, and the diameter（D） at 0. 25H, 0. 5H, and 0. 75H, are analyzed by logarithmic model of power exponent function, lgH=a ＋blgD. The results show that, there are significant differences in the index of allometric growth in different growth stages of Machilus. The index of allometric growth between the tree height and the diameter at different height decreases with the growth of the diameter at breast; and decreases with the increase of height of the tree. It is indicated that, there is not a universal relationship between tree height and diameter at breast, the index should be systematically reduced with the growth of plant.
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