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

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