摘要
麻栎、栓皮铄、楠栎、槲树、白栎五种栎木为环孔材,具宽、细两种射线。薄壁组织环管和带状。麻栎和栓皮栎心材带红色,且具大量侵填体,称麻栎类;槲栎、槲树和白栎木材非红色,无侵填体或很少,称槲栎类。两类栎木气干密度均属重的一级;弦径干缩比麻栎类为大级,槲栎类为中级;木材顺压,麻栎类为高级,槲栎类为中级;抗弯强度均属甚高级,硬度为硬至甚硬,冲击韧性为高级;两类木材强度性质与质量系数都是高的一级。表明五种木材强度大,质量高,弹性好,但自然干燥易变形、开裂。
The wood of Quercus acutissima, Q. variabilis, Q. aliena, Q. dentata, Q. fabri is ring-porous, ray broad and fine, parenchyma vasicentric and banded. The heart wood of Q. acutissima and Q. variabilis is red and have abundant tyloses, called acutissima group. The wood of the remainder species is not red and has no or very few tyloses, called aliena group. The air dried density of wood of the two groups is all of heavy grade. The rate of tangential radial shrinkage of acutissima is grand grade and that of aliena group is of middle grade. The compression strength parallel to the grain of acutissima group is of high grade and that of aliena group is of middle grade. The bending resistant strength is all the very high grades, the hardness is hard to the hardest, the toughness is all of high grades. The strength properties and quality indexes of the two groups are all of high grades. This indicates that the strength and quality of wood are all high and its elasticity is excellent.
关键词
麻栎
槲栎
白栎
木材识别
材性
Quercus acutissima
Q. variabilis
Q. aliena
Q. dentata
Q. fabri
wood identification
wood physical properties
wood strength properties
