杨树无性系木材纤维形态特征及其径向变异的研究

以生长在安徽省天长市城西林场的5种不同的杨树无性系人工林木材H22、Z9、Z3、B3和107 为对象,对木材纤维形态特征进行了研究,并分析了其径向遗传变异规律.结果表明,5个无性系杨树的纤维长度、宽度以及长宽比在幼龄期较小,但随着生长轮的增加,呈增大的趋势,并在达到一定的年龄后保持稳定波动或略有减小;腔径、双壁厚以及壁腔比的径向变化规律总体上也是随着生长轮呈增大趋势,可能受到早晚材的影响,部分无性系的双壁厚和壁腔比变化波动较大.

Radial Variation of Fiber Morphology of Different Poplar Clones

In this paper,5 different poplar clones grown in the forest station in the suburb of Tianchang city of Anhui Province were selected as the materials to study the radial variation of fiber length, fiber width, lumen diameter, double cell wall thickness, the ratio of fiber length to width, the ratio of cell wall to cell cavity and microfibrillar angle. The results are as follows: 1) From pith outward, the fiber length, the fiber width and the ratio of fiber length to fiber width of 5 poplar clones all increase with the increase of growth rings,reach maximum in a certain year and then decrease or level off.The suitable clone to make paper is Z9 and H22 according to the paper making properties.2) The lumen diameter, double cell wall thickness and the ratio of cell wall to cell cavity all increase with the increase of growth rings. The ratio of cell wall to cell cavity ranged from 0.28 to 0.31, and the B3 clone is is suitable for paper material.