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窿缘桉(Eucalyptus exserte)和柠檬桉(E.citriodora)是华南地区大面积引种造林的两种桉树。鉴于桉树木材固有的缺陷和近年来在利用中出现的问题,人们对它的评价不一。本研究试图对这两种桉木作全面的材性比较,并探索其材性与木材构造的相互关系,为利用提供参考。一、木材的解剖性两种桉木的试材均采自雷州林业局林科所。胸径16—20cm,树龄同是17年,立地条件基本一致。每种选3株截取胸高圆盘。每个圆盘分别在离髓心的第2,6、10、14各生长轮取样,制成切片或纤维分离后,分别观察其组织构造,测定组织比率和纤维形态。
Eucalyptus exserte and E. citriodora are two kinds of eucalyptus trees introduced in large area in South China. In view of the inherent shortcomings of eucalyptus wood and the problems that have arisen in its use in recent years, it has been appraised differently. This study attempts to make a comprehensive comparison of the two kinds of eucalyptus wood, and explore the relationship between its material and wood structure for reference. First, the anatomy of wood Two kinds of eucalyptus wood samples were collected from Leizhou Forestry Bureau Linke. DBH 16-20cm, the same age is 17 years, site conditions are basically the same. Each selected 3 interception chest high disc. Each disk was taken from the 2nd, 6th, 10th and 14th growth rounds of the medulla respectively, and then cut into sections or separated from the fibers. The structures of the disks were observed respectively, and the tissue ratio and the fiber morphology were determined.