林业科学2011，Vol.47Issue(8)：115-120,6.
人工授力欧美杨107杨不同倾斜角度苗木的微纤丝角、基本密度和轴向干缩率
Microfibril Angle, Basic Density and Longitudinal Shrinkage of Different Inclined Angles in Artificial Leaned Saplings of Poplar ‘1 -107' (Populus × euramericana ‘Neva' )
摘要
Abstract
Sixty two-year-old saplings of poplar 'I -107' (Populus x euramericana ' Neva' ) which were divided into five groups were planted in spring and artificially inclined at the angles of 0°, 15° ,30° ,45°and 60° from the vertical. The samples were collected from secondary xylem of the last growth ring after four months growth and separated as tension wood area(TW)and opposite wood area(OW). Then the microfibril angle, basic density and longitudinal shrinkage were analyzed. The following conclusions were drawn:1) Along with the increase of inclined angles, microfibril angle of tension wood area and opposite wood area all decreased, the values of tension wood area were smaller than those of opposite wood area. The ANOVA results revealed that there were significant effects of inclined angle and area. 2 ) Along with the increase of inclined angles, basic density of tension wood area increased, those of opposite wood area increased first and then decreased little. The values of tension wood area were 5. 7% - 14.4% bigger than those of opposite wood area. The ANOVA results revealed that there were significant effects of area; there weren' t significant effects of inclined angle and the interaction between inclined angle and area. 3 ) Along with the increase of inclined angles, longitudinal shrinkage of tension wood area increased first and then decreased later, those of opposite wood area decreased. The values of tension wood area were 1.0 -2.0 times bigger than those of opposite wood area. The ANOVA results revealed that there were significant effects of area; there weren' t significant effects of inclined angle and the interaction between inclined angle and area. 4) For tension wood area and opposite wood area there were negative relationships between longitudinal shrinkage and microfibril angle and negative relationships between longitudinal shrinkage and basic density.关键词
欧美杨107杨/应拉木/微纤丝角/基本密度/轴向干缩率Key words
Populus x euramericana ' Neva' / tension wood/ microfibril angle/ basic density/ longitudinal shrinkage分类
农业科技引用本文复制引用
刘亚梅,刘盛全..人工授力欧美杨107杨不同倾斜角度苗木的微纤丝角、基本密度和轴向干缩率[J].林业科学,2011,47(8):115-120,6.基金项目
国家自然科学基金(30671641). （30671641）
