【摘要】 通过对加杨和格鲁德杨物理力学性质的测定分析,以期为加杨和格鲁德杨人工林的定向培育和高效利用提供理论科学依据。结果表明:加杨的气干密度为0.468 g/cm~3,基本密度为0.372 g/cm~3;径向干缩系数为0.133%,弦向干缩系数为0.270%,体积干缩系数0.553%,抗弯弹性模量为9 302.99 Mpa,抗弯强度为79.69 MPa,顺纹抗压强度为40.32MPa。格鲁德杨的气干密度为0.453 g/cm~3,基本密度为0.355 g/cm~3,径向干缩系数为0.205%,弦向干缩系数为0.304%,体积干缩系数0.554%,抗弯弹性模量为9 014.44 MPa,抗弯强度为55.87 MPa,顺纹抗压强度为33.09MPa;综合分析各项指标,加杨材性较优于格鲁德杨。更多还原

【Abstract】 The physical-mechanical properties of Populus × canadensis Moench and Populus × euramericana(Dode) Guinier cv. Gelrica were studied to provide theoretical and scientific bases for the directional breeding and efficient use of artificial forests with P. canadensis and P. euramericana Gelrica. The results showed the air-dried density, basic density of P. canadensis were 0.468 g/cm~3 and 0.372 g/cm~3,respectively; the shrinkage coefficient of radial, tangential and volume were 0.133%,0.270% and 0.553%, respectively;the modulus of elasticity in static bending, the bending strength and the compressive strength parallel to grain were 9 302.99 MPa,79.69 MPa and 40.32 Mpa, respectively. As for the P. euramericana Gelrica, the air-dried density, basic densitywere 0.453 and 0.355 g/cm~3, respectively; the shrinkage coefficient of radial, tangential and volume were 0.205%, 0.304% and 0.554%,respectively; the modulus of elasticity in static bending, the bending strength and the compressive strength parallel to grain were 9 014.44, 55.87 and 33.09 Mpa respectively. Comprehensive analysis of the indicators showed that the properties of P. canadensis were better than those of P.euramericana Gelrica.更多还原