三年生花眉竹不同部位纤维形态特征的分析研究

Fiber Morphology Properties in Different Positions of the Culm of Three-year-old Bambusa longispiculata Gamble

关键词:  花眉竹  竹竿部位  纤维形态  频率分布

Key Words:Bambusa longispiculata  different positions in culm  fiber morphology  distribution

摘要:分析了三年生花眉竹不同部位纤维形态的差异,揭示了竹竿不同离地高度和水平部位对三年生花眉竹材纤维长度及其频率分布、宽度、长宽比、壁厚、腔径、壁腔比的影响规律。结果表明,三年生花眉竹材纤维形态特征随竹竿离地高度变化为：4.5 m处纤维长度、长宽比、壁腔比最大,6.5 m处纤维宽度最大，0.5 m处纤维壁厚最大，2.5 m处纤维腔径最大。三年生花眉竹材纤维形态特征随竹竿水平部位变化表现为：竹壁外层纤维长度和宽度最大。竹壁内层纤维长宽比最大,外层最小。竹壁外层纤维壁厚和腔径最大。竹壁中层纤维壁腔比最大,内层最小。纤维长度大部分集中分布在1.0～3.0 mm之间,占85%～95%。

Abstract:The fiber morphology properties in the different positions of the culm of three-year-old Bambusa longispiculata were analyzed which included fiber length, width, the ratio of length to width, double wall thickness, carity diameter, ratio of wall thickness to cavity diameter. The results showed that the fiber morphology characteristics of three-year-old B. longispiculata changed with different perpendicular positions of the culm. The max fiber length, ratio of length to width, ratio of wall thickness to cavity diameter were found at the 4.5 m above the ground. The max fiber width, double wall thickness and cavity diameter were in the 6.5 m, 0.5 m, 2.5 m above the ground, respectively. The fiber morphology characteristics of three-year-old B. longispiculata also changed with different horizontal positions of the culm: the fiber length and width of outer layer of bamboo culm were the maximum; the ratio of fiber length to width of the inner layer was the maximum, that of outer layer was the minimum; the fiber wall thickness and cavity diameter of outer layer were the maximum; the ratio of fiber wall thickness to cavity diameter of the middle layer was the maximum, that of inner layer was the minimum. Mostly fiber length distributed in the range of 1.0 mm to 3.0 mm, accounting for 85% to 95%.