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以安徽琅琊山天然林内的刺楸木材为材料，在研究其解剖特征和物理力学性质变异的基础上，着重探讨刺楸木材幼龄期。结果发现：根据不同材性指标变异模式划分出的幼龄期不相同，以纤维长度和微纤丝角的径向变异规律划分出的幼龄期为１７年，以基本密度和顺纹抗压强度的径向变异规律划分出的幼龄期为１５年；根据同一材性指标不同高度材性变异模式划分的幼龄期也有差异。其总体趋势为：随着树干高度增加，其幼龄期略微变短。
In order to study the variation of anatomical characteristics and physical and mechanical properties of Catalpa bungei in the natural forest of Langya Mountain in Anhui Province, the author discusses the juvenile age of Catalpa bungei. The results showed that the juvenile period was divided according to the variation pattern of different wood properties. The juvenile period was 17 years according to the radial variation of fiber length and microfibril angle. The basic density and compressive strength Of the radial variation of the juvenile period divided by 15 years; according to the same materiality indicators of different heights of material variation patterns of young age are also different. The overall trend is as follows: As the trunk height increases, its young age is slightly shorter.