速生灌木沙柳的纤维形态及解剖结构研究

Fibre Morphology and Anatomical Structure of Sandlive Willow(Salix psammophila)

采用光学显微镜(LM)和扫描电子显微镜(SEM)并结合Kajaan i FS200分析仪研究了沙柳(Salix psamm ophilaC.W ang et Ch.Y.Yang)的纤维形态和解剖结构。结果表明:沙柳主要由导管、木纤维、木射线薄壁细胞及少量轴向薄壁细胞组成。沙柳属于阔叶木散孔材,年轮界限明显,木射线单列同型、导管上的纹孔排列方式较复杂。通过与毛白杨、麦草和红松的形态学参数比较研究发现,沙柳虽然属于短纤维,纤维平均长度为0.52 mm,但是其纤维含量较高,纤维形态良好,长宽比值较大,壁腔比值较小,有助于在打浆抄纸过程中形成纤维间良好的结合,提高纸张的物理强度,是良好的造纸原料。

The present study was undertaken to investigate fibre morphology and anatomical structure of sandlive willow （Salix psammophila C. Wang et Ch. Y. Yarig）, Results from light microscopy （ LM ）, scanning electron microscopy （SEM）, and Kajaani FS200 analysis showed that anatomical features of S. psammophila exhibited distinct growth ring boundaries exclusive uniseriate rays, diffuse-porous vessels in solitary arrangement, and diversified perforation plates and intervessel pits. The cells are of four types： vessel, fibre, ray parenchyma and axial parenchyma. Fibres make up 60 % - 70 % of total cells. Although mean fibre length of S. psammophila is 0.52 mm, this fiber is beneficial to pulping and papermaking according to its fine fibre morphology.