中文摘要：

以簸箕柳为对象,对其木材基本密度,木材纤维素、半纤维素及木质素含量在树干不同高度上的变化趋势进行了研究。结果表明：6株样本木材的基本密度为0.331 2～0.385 4 g/cm^3,且在个体内都呈现随着树干高度的增加逐渐降低的趋势;样本木材的纤维素、木质素及半纤维素含量的变化范围分别为48.69%～56.89%、12.58%～16.42%、19.83%～23.76%,纤维素含量及半纤维素含量在不同个体内由根部到梢部均逐渐降低,木质素含量则表现出两头高、中间低的趋势,并且最高值出现在梢部。方差分析表明,尽管不同个体间木材化学成分含量和基本密度都存在显著差异（达1%极显著性水平）,但这些性状在不同植株内沿树干高度的变异均未达显著水平。

英文摘要：

The intra-individual variations of the basic density and the contents of main wood chemical compounds,including cellulose,hemicellulose and lignin,along stems of S. suchowensis were measured in this study. Statistical analyses revealed that the basic density and the main wood compounds along the stem varied as following： the wood basic density decreased from stem base to stem top,in range of 0. 331 2- 0. 385 4 g /cm^3 for the measured samples. The contents of cellulose,lignin and hemicellulose were in ranges of 48. 69%- 56. 89%,12. 58%- 16. 42%,19. 83%- 23. 76%,respectively,for the measured samples. Contents of cellulose and hemicellulose were found to decrease from stem base to stem top in all the measured samples. By contrast,lignin content exhibited a different variation trendency. For all measured samples,the lowest content appeared in the middle of the stem,and it increased towards both ends,with the highest lignin content appeared at the top of the stem. However,ANOVA statistics indicated that the basic density and the main wood chemical compounds varied insignificantly along the stems within individuals,while they varied significantly among different individuals.