3年生慈竹竹秆不同部位的解剖特征

Anatomical properties of three-year old Neosinocalamus affiniss stalk at different heights

【目的】研究慈竹竹秆不同部位的解剖特征,为慈竹的合理利用提供理论依据。【方法】采用数显投影仪、奥林巴斯显微镜和木材图像分析软件,对生长于四川洪雅3年生慈竹不同竹秆高度（0~10m）的竹材纤维长度、纤维宽度、纤维壁厚、纤维腔径等形态指标和组织比量进行测量分析。【结果】慈竹纤维长度2.60mm,属于长纤维,宽度14.44μm,长宽比179.73;壁厚9.85μm,腔径4.71μm,壁腔比2.28;基本组织比量47.84%,纤维组织比量42.25%,输导组织比量9.91%。在轴向上,纤维长度以竹秆中部最大,纤维宽度由竹秆基部向上逐渐减小,纤维壁厚和输导组织比量则相反;在径向上,纤维长度、宽度、腔径以中部最大,而壁厚由内侧向外侧呈逐渐增大的规律。【结论】慈竹是优良的纸浆材料。

[Objective] The anatomical properties of Neosinocalamus a f finis stalk at different heights were investigated to improve its utilization. [Method] Microscopic projector and wood analysis software were used to investigate indexes including fiber length,width and tissue proportions in 0--10 m stalk of 3- year old Neosinocalamus a f finis in Hongya,Sichuan. [Result] The fiber length, width, length/width rati- o,wall thickness,lumen diameter and wall/lumen ratio were 2.60 mm, 14.44 μm, 179.73,9.85 μm, 4.71 μm, and 2.28 ,respectively. The fiber was long fiber based on its length. The fiber,parenchyma,and conduc- ting tissue proportions were 47.84 %, 42.25%, and 9.91% respectively. The variations of fiber morphology and tissue proportions at different heights were significant. Longest fiber was found in the middle portion. The fiber width decreased from the base to top, while change of fiber cell wall thickness and fiber tissue proportions was opponent. In the radial direction, middle part had the largest fiber length, width and lumen diameter, and the fiber cell wall thickness increased from inner to outer. [Conclusion] Neosinocalamus affinis bamboo is very good raw material for pulping.