通过对陕西省陇县八渡林场油松 ( Pinus tabulaeformis)优树半同胞子代及亲本木材解剖构造与物理力学性质的比较研究 ,结果表明 :油松优树半同胞子代林家系尚处于幼龄材阶段 ,顺纹抗压强度低 ;但全干干缩系数小 ,微纤丝角亦较小 ,尺寸稳定性高 ,不易变形 ,据此可以推测其成熟材是优良的结构用材 A comparative study on the anatomical structure and physical and mechanical properties of the elite semi-siblings of Pinus tabulaeformis and their parents at Patongsiao Forest Farm in Patongsan, Shaanxi Province was conducted. The results showed that: At the age of the aged material, the compressive strength of the grain along the grain line is low. However, the dry shrinkage coefficient of the whole stem is small, the microfibril angle is also small, the dimension stability is high and the deformation is not easy. Therefore, it can be presumed that the mature wood is an excellent structural material