I-69杨应拉木生长应力及纤维形态特征的研究  

Growth stress and fiber morphology of tension wood in poplar I-69

作　　者：刘亚梅[1] 王传文 方长华[1] 刘盛全[1] 

机构地区：[1]安徽农业大学林学与园林学院,合肥230036 [2]石台县黄沙坑林场,石台245111

出　　处：《安徽农业大学学报》2007年第4期534-539,共6页Journal of Anhui Agricultural University

基　　金："安徽省高校学术和技术带头人后备人选"项目;安徽省优秀青年基金项目共同资助

摘　　要：以生长在安庆洲滩的具有不同倾斜角度的6棵I-69杨为研究对象,对应拉木生长应力和纤维形态进行了研究。结果表明:6株倾斜树干的I-69杨应拉木区生长应力指示值(growth stress indicator,GSI)均值为280×10-3μm,对应木区的GSI均值为30×10-3μm,两侧木区的GSI均值为100×10-3μm;应拉木比非应拉木的纤维长度长,长宽比大,但纤维宽度、腔径、双壁厚、壁腔比的值应拉木均比非应拉木的小,单因素方差分析结果表明,不同单株、不同方向(应拉木区、对应木区和两侧木区)对纤维形态特征值均有显著性的影响;纤维形态特征的径向变异规律总体上是由髓心向外增大,并在达到一定的年龄后保持稳定波动或略有增大;树干最外围纤维长度与GSI值径向变化趋势一致且相关性显著,纤维长度与GSI值得到多项式方程为y=0.0023x2-0.0309x+1 315.9(R2=0.9843)。In the study,6 trees of poplar 69 （ Populus deltoids cv. 1-69/55 ） with different leaning angles grown in the Islet beach of Yangtse river were selected as material to analyze the growth strain indicator （GSI） and fiber morphology of tension wood. The results showed that the average GSI value of six trees in tension wood area was 280 × 10^-3 μm, 30 x 10^-3 μm in opposite wood area, 100 x 10^-3 μm in side wood area. The average value of fiber length and ratio of fiber length to width were larger in tension wood area than that in normal wood area, the value of fiber width, lumen diameter, double wall thickness and ratio of wall thickness to lumen diameter were all smaller in tension wood area than that in normal wood area. Variance analysis showed significant influence of individual plant and directions on fiber morphology. The fiber morphology all increased with the growth of rings, reached maximum in a certain year and then fluctuated. The radial variation pattern of fiber length in the outside of stem （ ring 17 ） was corresponding with the GSI value along trunk periphery, and it got polynomial equation： y = 0. 0023x2 -0. 0309x ＋ 1 315. 9（R^2 =O. 9843）.

关 键 词：I-69杨 应拉木 生长应力指示值(GSI) 纤维形态特征 

分 类 号：S781[农业科学—木材科学与技术]