湖南主要阔叶树材微观构造的研究

对湖南 19科 2 8属 3 4种主要阔叶树材的微观构造进行了研究 .结果表明 :单位面积管孔数及导管分子长度与管孔直径成反比 ;各种类型轴向薄壁组织所占比率 ,按从小到大排列顺序为轮界型 <傍管型 <离管型 ;按纤维长度分级 ,各级所占比率按从大到小排列顺序为中等 >长 >甚长 >极长 ;按宽度分级 ,各级所占比率按从大到小排列顺序为细 >中 >粗 >甚粗 ;纤维长宽比 >45 ;射线高度的变化规律是 ,单列、二列射线的木材所占比率 ,按从小到大排列顺序为环孔材 <半环孔材 <散孔材 ,多列射线的木材所占比率 ,按从小到大排列顺序为环孔材 <散孔材 <半环孔材 ;纤维微纤丝角度较小

A Study of the Microstructure the Main Hardwood in Hunan Province

This paper deals with the minute structures of 34 species, 28 genera and 19 families from the main hardwoods in Hunan Province. The results show that the number of pores per square millimeter and length of vessel elements are inversely proportional to the porous diameter; types of longitudinal parenchyma are termial parenchyma < paratracheal parenchyma < apotracheal parenchyma; that on the distribution of the grading of length and width of fiber is the former middle length > length > very length > extreme length, and the later small > middle > coarse > extreme coarse; the ratio of fiber length to width usually is more than 45; that on varying regularity in wood ray highness is ring porous wood < semi diffuse porous wood < diffuse porous wood for uni seriate ray and bi seriate ray, but ring porous wood < diffuse porous wood < semi diffuse porous wood for multi seriate ray; and that there are less micro fibrillar angles of fiber. These results of the study could provide certain theoretical bases for the utilization of construction timber, furniture, wood flooring, decoration veneer, pulpwood, fiber industry and the identification for tree species.