香椿木材年轮宽度与解剖形态特征研究  

Growth Ring Width and Anatomical Properties of Toona sinensis Wood

作　　者：罗建勋[1] 卢丹[2] 齐锦秋[2] 黄兴彦[2] 李凤[2] 

机构地区：[1]四川省林业科学研究院,四川成都610081 [2]四川农业大学林学院,四川雅安625014

出　　处：《西南林业大学学报（自然科学）》2015年第2期95-99,共5页Journal of Southwest Forestry University：Natural Sciences

基　　金：四川省植物资源平台项目资助

摘　　要：采用木材切片法和光学显微技术，研究香椿木材的微观特征，分析年轮宽度、导管及纤维形态的径向变异。结果表明：髓心至第10年年轮宽度迅速增加，1～20 a间均保持旺盛的生长；早材和晚材的导管宽度、双壁厚、腔径由髓心向外逐渐增大，约19 a 后趋于平稳，早材导管宽度121．80μm，晚材导管宽度38．75μm，早材导管双壁厚度10．98μm，晚材导管双壁厚度16．49μm；纤维长度由髓心向外呈逐渐增大的趋势，18 a后纤维长度基本趋于稳定，纤维形态指标平均值分别为：长度1080．94μm，宽度26．76μm，长宽比40．25，双壁厚7．96μm，腔径18．80μm，壁腔比0．43。Growth ring,vessel and fiber morphology of Toona sinensis wood were evaluated by using xylotomy and optical microscopy.The results were as follows：the growth ring width increased from pith to 10 -year old, keeping vigorous growth from 1 to 20 years.The width,double wall thickness and lumen diameter of vessel in early wood and late wood increased from pith to 19-year old,then tending towards stability.The width of vessel in early wood and late wood were 121. 80μm and 38. 75 μm,and the double wall thickness of vessel in early wood and late wood were 16.49 μm and 10.98 μm,respectively.The fiber length first increased from pith to 18-year,ending up with stability.The average fiber length,width,length to width ratio （L/W）,double wall thickness,lumen di-ameter and double wall thickness to lumen diameter ratio （2T/D）were 1 080. 94μm,26.76 μm,40.25,7.96μm,18.80 μm,0.43,respectively.

关 键 词：香椿 年轮宽度 纤维 导管 微观构造 

分 类 号：S781.1[农业科学—木材科学与技术]