三种阔叶树枝桠材应拉木和对应木的解剖特征及材性的研究

Study on the Anatomical Features and Properties of Tension Wood and Opposite Wood of Branches of Three Hardwoods

通过对３ 种阔叶树 （米槠、木荷、拟赤杨） 枝桠材的应拉木和对应木的解剖特征及材性的观察和试验，并与正常干材比较， 结果表明： 它们在纤维、导管的长度、宽度、纤维次生壁 Ｓ２ 层纤丝角、化学成分、纤维素相对结晶度、密度、吸水性、涨缩性以及顺纹抗压强度、抗弯强度及其弹性模量等都存在显著差异。

By studying the tension Wood and opposite wood of three hardwood branches and compared with their normal stemwoods,the results show that there are marked differences among these three tissues in length and width of fiber and vessel,in s 2 layer′s microfibril angles of fiber secondary wall,in chemical composition,in relative crystallinity of cellulose,in density,in water absorption,in shrinkage and swell,in parallel to grain compression strength,in bending strength and its modulus of elasticity.