【摘要】 运用体视学方法,对枫杨导管、微纤丝角变异规律进行研究。结果表明,枫杨导管长宽比约为3 2,水淹程度不同的两组间的导管平均直径在径、轴向上变化有一定差异。枫杨微纤维角由髓心向外逐渐变小,与年轮显著相关,但水淹程度不同的两组间微纤丝角在轴向上的变化趋势不一致。在0 05水平上,经T 检验水淹程度不同的两组间的导管平均直径、形状因子、单位体积中导管所占面积及微纤丝角差异不显著。更多还原

【Abstract】 The variability of the vessel and microfibrillar angle(FA) of Pterocarya stenoptera was studied in stereology.The result indicated that the vessel length to vessel width ratio is 3.2, vessel diameter of the two groups vary differently in radial and longitudinal. The FA becomes smaller and smaller from the pith outward and the relationship between it and cambium age correlates remarkably, while the FA varies differently in longitudinal. The differences of vessel diameter, form factor of vessel, area of vessel per unite volume and FA between the two groups are not significant at 0.05 level.更多还原