广东高州马尾松三个变型的材性比较

广东高州生长的马尾松由于树皮厚薄,松脂产量高低和枝条伸展情况而被分为三个类型——黑鳞松、黄鳞松和垂枝松。 本文试图通过对其材性的研究比较,从中发现它们之间在木材解剖和物理力学性质上的大小和差异。研究结果表明:黑鳞松材色较深,晚材率较高,管胞较长,轴向树脂道较多;黄鳞松则管胞壁较厚,各项力学性质较高,垂枝松除年轮较宽外,各项性质均低于前者。但根据方差分析检验,三个变型之间的主要性质均无显著差异,而各单株之间则差异显著或极显著。作者等认为在选择马尾松优良类型时,不应该依不同变型划分,而应从单株优树进行选择,这样可能更为有效。

THE COMPARISON STUDY ON THE WOOD PROPERTIES OF THREE FORMS OF PINUS MASSONIANA LAMB. OF GAOZHOU, GUANGDONG PROVINCE

Pinus massoniana Lamb. grown in Gaozhou, Guangdong Province is divided into three forms because of the bark of the tree thicker or thinner, the resin production higher or lower and the extending condition of branches, i. e., the black scale bark pine, the yellow scale bark pine and the weeping branch pine. It was undertaken to study and compare the wood properties of the three forms of masson pine in this paper to find out their differences and qualities rf anatomy and physical mechanical properties. The results show that the black scale bark pine has the darker bark, higher rate of late wood, longer tracheid length and much more resin canal, the yellow scale bark pine has the thicker tracheid cell wall and higher strength properties) the weeping branch pine has the lower figure in all properties except the ring width. But according to the tests of analysis of variances there are no certain differences occurred in wood anatomy and physico-mechanical properties among the three forms of masson pine. However, there are differences or significant differences occurred in wood properties in the single trees. It is advised that, when we select the fine varieties from masson pine, don't make a choice among the forms but should select from the single trees which have the good qualities.