巴西橡胶树不同抗风性品系木材胞壁纤丝角

Fibril Angles of Fiber Walls in Woods of Diffrent Wind-Resistant Clones of Hevea brasiliensis

应用X射线(002)衍射的Cave法,对巴西橡胶树的13个具不同抗风力的品系PR107、海垦1、RRIM600、PB86、GT1等主干和枝干木材纤维壁的(微)纤丝角,进行了初步测试分析。结果表明:主干和枝干木材纤维壁S2层的纤丝角,在抗风和弱抗风品系之间存在着明显的差异;品系的抗风力与木材纤维S2层纤丝角度有一定的关系,抗风品系的木材纤维壁S2层纤丝角度较小,弱抗风品系的纤丝角度较大;主干木材纤维S2层纤丝角度小于枝干材的纤丝角度。

The micro -fibril angles of the fiber walls were preliminarily measured using X-ray(002)diffraction Cave method in woods of13differently wind-resistant clones,i.e.PR107,HAIKEN1,RRIM600,PB86,GT1.and etc.The results showed that there existed significant differ-ences in the micro-fibril angle degrees in S 2 layers of fibril walls in trunk and branch woods between the wind-resistant and less wind-resistant clones.The micro-fibril angle degrees were rela tive to the wind-resistance of the clones to a certain extent.The wind-resistant clones were of smaller micro-fibril angles and the less wind-resistant cultivars were of larger ones.In addition,the micro-fibril angles of the trunk wood samples were smaller than those of the branch samples in the same clones.