不同淹水程度对长江滩地枫杨组织比量的影响及变异

研究结果表明：在径向上，阉水1个月和2个月的两组间，除导管比量变化趋势基本相反外，纤维比量、轴向薄壁组织比量和木射线比量变化趋势相近似。在轴向上，两组间纤维比量和木射线比量随树高的增加变化趋势相反，导管比量和轴向薄壁组织比量随树高的增加变化趋势相似。第一组和第二组的纤维比量分别为65．89％、62．7％；木射线比量分别为12．22％、15．07％。经T－检验，在0．05水平上，纤维比量和木射线比量在两组间差异显著，而导管比量和轴向薄壁组织比量差异不显著。

Effect and Variation of Different Flooding Degree upon the Tiss ue Proportion of Pterocarya stenoptera C DC Grown in the Beaches of Changjiang River

Except the proportion of vessel (VP) which varies reversely,the proportion of fiber (FP) ,the proportion of ray (RP) and the proportion of axial parenchyma (APP)vary in the similar pattern in radial The FP and RP vary reversely,while the VP and the APP vary similarly along with the longitudinal The FP and RP of No 1 and No 2 are 65 89%,12 22% and 62 73%,15 07% respectively The differences of the proportion of FP and RP between the two groups are significant,while the differences of the VP and APP aren't significant at 5% level.