<正>研究三种不同立地指数下红皮云杉人工林木材的管胞形态及其径向变异规律：（１）三种立地指数下木材管胞形态特征有着相同的径向变化模式；（２）根据管胞形态的径向变异规律，三种立地指数下木材管胞达到成熟的年龄基本相同，均在１８～２０年间；（３）立地指数对木材管胞长度、管胞长宽比和壁腔比有影响，且总的趋势是其值随立地指数增大而增加。

The wood tracheid morphological features and their radial wariations of Korean spruce plantations from 3 plots on different indexes are studied. The results are as follows: (1) The radial variation patterns of the tracheid morphological features of the wood from 3 plots are respectively similar. (2) Based on the radial variation patterns, there are no obvious differences in the mature ages of wood from 3 plots. It is determined to be about 17～20 years. (3) The tracheid length, the tracheid length_width ratio and the ratio of double wall thickness to lumen are increased as the site index is increased.