油松种内材质变异的研究

对油松2个天然林、11个人工林中326株样水以及11年生子代林16个家系151株样木的木材密度、管胞长度、晚材率作了观测,上述指标在树于不同方位间无显著差异,但在不同高度间有极显著的差异,纵向变异模式一致。材质指标的变异存在于种内各层次间,但林分内单株间的变量最大。生长快慢和材质间不存在相关,木材密度和管胞长度遗传力在中度以上。

Study on Variation of Wood Propertiesin Pinus tabulae formis

The wood properties including wood density,tracheid length and latewood percentage of 326 sample trees from two nature forest stands and 11 plantations, and the wood properties from 151 trees from open-pollinated progenies originating from 16 plus trees of Pinus tabulaeformis were observed. The results showed that there were no significant differences in the wood properties of samples collected from different directions at the same height. The wood density of samples originating from different stem heights was however, significantly different. Variation of wood density mainly existed among individuals within the populations. It is possible to select fast growing trees with high quality wood. Considerable variations of wood density and tracheid length among and within families were noticed. The heritabili-ties of specific gravity and tracheid length were 0.735 and 0.569 respectively.