大木竹纤维形态与组织比量的研究

通过对浙江南部大木竹的纤维形态和组织比量测定，并与造纸性能良好的青皮竹和当地分布较广的绿竹进行比较，结果表明：大木竹竹材属于长纤维原料，纤维长2．2，4mm，比青皮竹(2．29m)略小，而比绿竹(1．87mm)为大；纤维长宽比达166，较青皮竹和绿竹的相应值147和131均大，其中与绿竹的差异达显著水平；壁腔比为3．5；纤维组织比量达48．68％，比青皮竹(50．19％)略小，而比绿竹(45．78％)为大。大木竹纤维形态和组织比量各指标在竹秆的纵向和径向均有一定变异，主要表现为，纤维壁腔比和纤维组织比量随秆的高度增加而增大；在径向部位，纤维长度和长宽比均为竹壁中部较大，而壁腔比则为竹壁外侧较大。竹龄主要对壁腔比产生影响，1年生、3年生大木竹的壁腔比明显大于当年生竹。

Study on Fiber Forms and Tissue Measurements of Bambusa wenchouensis Wood

The fiber forms and tissue measurements of Bambusa wenchouensis wood in the southern area in Zhejiang province were tested and compared with those of B. textilis and Dendrocal_amopsis oldhami. The analytic results showed that the fiber length (L) of B. wenchouensis was 2.24 mm, a little shorter than that of B. textilis (2.29 mm)but longer than D. oldhami(1.87 mm); the ratio of fiber length to width (L/W) was 166, the largest one among the three woods, and those of the other bamboospe cies were 147 and 131 respectively; the ratio of wall thickness of fiber cell to the cavity diameter (T/D) was 3.5; measurements of fiber tissue was 48.68%, a bit smaller than that of B. textilis (50.19%)but larger than D. oldhami(45.78%). The fiber forms and tissue measurements were variable in both axial and radial parts of this bamboo: T/D and fiber tissue measurements increased gradually from the culm foot to tip; the fiber length and L/W both were the largest in the central bamboo wall, while T/D was the highest in the outer wall. The age had a significant influence on T/D, which was much larger of 1 or 3-year-old wood than that of month-old wood.