Abstract: Based on the determination and comparative analysis of fiber morphology and chemical composition of Toona sinensis from plantation and natural forest, the character of fiber morphology and chemical composition and the law of change in fiber morphology with age as well as differences of fiber morphology and chemical composition between T. sinensis wood from plantation and natural forest were studied. The results showed that T. sinensis from plantation reached technological maturity at about 10 ages. The length of wood fiber, the ratio between length and width, ash and extractive contents of wood were lower than those from natural forest, the width of wood fiber and the contents of cellulose, pentosan and lignin were higher than those from natural forest. T. sinensis wood can be used as fiber material in forest products industry.

Key words: Toona sinensis, plantation, natural forest,annual growth ring, fiber morphology, chemical composition

摘要： 通过对香椿人工林和天然林木材纤维形态和化学成分的比较分析,揭示了香椿人工林木材纤维形态的特征及径向变化规律,以及人工林和天然林木材纤维形态和化学成分的差异。结果表明,香椿人工林的工艺成熟期为10年左右,其木材纤维长度和长宽比小于天然林,宽度大于天然林;纤维素、戊聚糖和木素含量均稍高于天然林;灰分和抽出物含量均低于天然林。香椿木材可作为林产工业纤维材料使用。

关键词: 香椿, 人工林, 天然林, 轮龄, 木材纤维形态, 木材化学成分