绿竹竹龄和竹秆径向部位对纤维形态特征的影响

Effects of Bamboo Ages and Radial Positions in Culm on Fiber Morphology of Dendrocalamopsis oldhami

中文关键词:  绿竹  竹龄  纤维形态  纤维长度分布频率

Key Words:Dendrocalamopsis oldhami  age of bamboo  fiber morphology  frequency distribution of fiber length

中文摘要:

      分析了绿竹竹龄和竹秆径向部位对纤维的长度及其分布频率、宽度、长宽比、壁厚、腔径、壁腔比的影响规律。结果显示，竹壁中层纤维的长度和长宽比较大，内层纤维较小；纤维宽度和壁腔比则是竹壁外层纤维较大，内层纤维较小；纤维腔径为竹壁内层纤维较大，中层和外层纤维较小。不同竹龄的绿竹纤维长度在1687～1961 μm之间，属长纤维类型；纤维宽度在11.9～17.6 μm之间，长宽比为104～147；纤维双壁厚随竹龄增加而增大，而纤维腔径随竹龄的增加而减小。大部分绿竹纤维的长度分布集中在1000～2500 μm之间，长度分布频率约为76%～86%。

Abstract:

      Fiber morphology of Dendrocalamopsis oldhami of different ages and at different radial positions in the culm was analyzed and compared in this study. The results showed that fiber length and the ratio of fiber length to width were longer and bigger at the middle layer of bamboo culm wall， and were shorten and smaller at the inner layer. Fiber width and the ratio of cell wall thickness to the lumen of fiber were bigger at the outer layer of bamboo culm wall， and were smaller at inner layer. Fiber lumen diameter at inner layer of the bamboo culm wall was almost bigger， and smaller at the middle and inner layers. The majority of fiber length of different age D.oldhami concentrated in 1687～1961 μm which belong to the long fiber species. The majority fiber width of D.oldhami of different ages mostly distributed in 11.9～17.6 μm， the ratio of fiber length to width was 104～147. 76%～86% frequency distribution of different age D.oldhami fiber length was mostly distributed in 1000～2500 μm. The results provided an important basis for oriented cultivation and effective utilization of D.oldhami．