云南杉木木材纤维胞壁纤丝角的研究

本文报道了利用偏光显微镜对云南不同地区,不同坡向和插条繁殖生长的杉木木材纤维弦壁纤丝角的测定,并对杉木的纤丝角与物理力学性质的关系进行了探讨。结果表明:杉木纤丝角的变异较大,它与力学性质有一定关系。随着纤丝角的减小,木材的顺纹抗压强度、抗弯强度、顺纹抗拉强度和冲击韧性明显地增加。因此,杉木的品质评定应将纤丝角作为重要的因子。

A STUDY ON FIBRIL ANGLE OF WOOD FIBER WALLS OF CHINESE FIR (CUNNINGHAMIA LANCEOLATA) IN YUNNAN

This paper reports the research result of fibril angle of wood fiber tangential walls of Chinese fir grown up in different regions,different slope directions and grown out of cut- tings by means of polarized-light. The relation between fibril angle and the physico-me- chanical properties of Chinese fir has been probed. The results show that variability of fibril angle of Chinese fir is greater and it has certain relation with the mechanical proper- ties. Along with the decrease of the fibrile angle,parallel compressive strength,bending strength,maximum tensile strength parallelgrain and impact strength of the wood increase distinctly. Therefore,in character evaluation of Chinese fir,fibril angle should be used as an important factor.