四种藤茎几项特性的变异

VERIATIONS ON SEVERAL CHARACTERISTICS OF FOUR RATTAN CANE SPECIES

棕榈科省藤亚科(Calamoideae)某些藤种的茎具有很高的经济价值,经过长期过度采收,我国野生藤资源已不多,重要商品藤仅几种。发展人工植藤、引进优良藤种及扩大国产商品藤种是解决我国藤器工业原料日愈短缺的基本途径,这几方面都有评估藤茎质量的问题,因而须进行藤茎的解剖特性、物理特性及其变异性的研究。 Teoh(1978)在八属马来藤的解剖工作中。

Variations in internode diameter and length, fibre morphology and specific gravity of four rattans, i.e. Daemonorops margaritae, Calamus simplicifolius, C. tetradactylus and C. dioicus were analysed. In axial direction, the varia- tion in internode diameter was very small. The fluctuation in internode length was relatively gentle. The fibre length has no definite variation pattern. The specific gravites of both bark and core show a decreasing trend from bottom to top. It seems that fibre length in the bark is longer than that in the core, but only that of C. dioicus reaches the statistical signlficance(p<0.05). Spe- cific gravity of the bark is markedly larger than that of the core. In axial and radial dirction, both the width and the lumen diameter of fibre show an increasing trend from the periphery to the centre and from bottom to top while the wall thickness rate (2 × wall thickness ×100/width) exhibits a contrary trend. The qualities of the four rattans were also evaluated in this paper preli- minarily.