Macroscopic staining, longitudinal shrinkage and growth strains of tension wood of poplar (Populus x euramericana cv I.214).
Macroscopic staining, longitudinal shrinkage and growth strains of tension wood of poplar (Populus x euramericana cv I.214).
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DOI：
10.1051/forest:19960604
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发表时间：
1996-01-01
期刊：
影响因子：
--
通讯作者：
Fournier, M
中科院分区：
文献类型：
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作者：
Grzeskowiak, V;Sassus, F;Fournier, M
本研究旨在对无性系I.214杨树抗张材的分布和性质进行研究。首先，使用氯化锌对杨木抗张木材进行宏观染色。然后，测量了正常木材和拉伸木材的纵向生长应变和轴向收缩。染色显示出细小的切向拉伸木材条带，与显微镜切片上的G纤维非常一致(图5)。通过染色表面比率来量化的拉伸木材含量与纵向应变的测量之间的相关性很弱(图6)。抗张木材的干缩率大于普通木材(5.6%比1.7%，表IV)。宏观染色证明木材结构在横向平面内迅速变化；这受到收缩测量的限制(图8和图9)。此外，还观察到纵向收缩沿纤维方向的快速变化，这可能是由于我们的样品位于叉子底部。
This study aims at characterizing distribution and properties of tension wood of poplar (clone I.214). First, the use of zinc chloroiodide for the macroscopic staining of tension wood was validated for poplar. Then, longitudinal growth strain and axial shrinkage were measured for both normal and tension wood. The staining revealed fine tangential strips of tension wood, closely corresponding to G fibres on microscopic slides (fig 5). The tension wood content, quantified by the stained surface ratio, was weakly correlated to the measurement of the longitudinal strain (fig 6). Tension wood shrinkage was greater than that of normal wood (5.6 vs 1.7%, table IV). Macroscopic staining evidenced rapid variations of wood structure within the transverse plane; this was confined by shrinkage measurements (figs 8 and 9). Moreover, rapid variations of longitudinal shrinkage along the fibre direction was observed, probably due to the location of our samples at the base of a fork.