摘要
生长在秦岭太白山北坡的紫萼丁香(Syringa oblata var.giraldii Rehd.)的木材结构随着海拔高度的增加而变化。其年轮宽度,导管分子长度、直径;纤维管胞长度、宽度;射线高度等值逐渐增加。导管频率、射线频率、单孔率值则逐渐减少。导管、纤维管胞的壁减薄,其次生壁上的螺纹加厚由明显到不明显。
The wood structure of Syringa oblata var.giradii Rehd.grown on the north side of Taibai Mountain varied with the increasing altitude:the width of growth ring,the length of vessel member,the vessel diameter,the length and width of fibretracheid and the ray height gradu- ally increased with the altitude;the frequency of vessel,the frequency of ray and the frequ- ency of solitary vessels decreased;the vessel and fibretracheid walls grew thinner.The spiral thickenings of the vessel wall and the fibre-tracheid wall in the lower altitude are more evi- dent and them gradually obscure.
关键词
紫萼丁香
生态解剖
木材结构
Syringa oblata var
giraidii Rehd.
Altitude
Wood structure
Ecological anatomy
