南亚松木材树脂道的扫描电镜观察初报

<正> 前 言 南亚松(Pinus finlaysoniana Wall.ex Bl.)为松属中最具有热带性的一种。在海南岛中部的白沙、东方、琼中和屯昌等县的山地和丘陵地区,从海拔几十米至一千米之间均有分布。南亚松含脂丰富,产脂力高,是广东重要的产脂树种之一。为了合理利用这一资源,制定采脂工艺规范,我们研究了南亚松木材树脂道结构,用扫描电子显微镜进行了观察,初报于下。

AN INITIAL REPORT ON THE OBSERVATION OF THE RESIN CANAL OF TENASSERIM PINE WOOD UNDER THE SCANNING ELECTRON MICROSCOPE

The resin canals of Tenasserim Pine (Pinus finlaysoniana Wall, ex Bl.) wood under the scanning electron microscope are something like this: The growth rings can clearly be seen. The signs of changes from the early wood to the late wood are sometimes drastic and sometimes gradual. In the drastically changed growth rings, the axial resin canals usually spread only in the late wood, while in the gradually changed growth rings they spread almost in every wood. Their diameters are around 100-200 microns, with 6-9 eqithelial cells. There is only one radial resin canal in most of the rays, rarely two. The length of the diameter of the radial resin canal is one fourth of that of the diameter of the axial resin canal.