For different silvicultural measures(forest composioin,planning densiy,thinning and pruning), the mechanical properties of Pinus koraiensis plantations were measured and analyzed. The results showed that the effect of...For different silvicultural measures(forest composioin,planning densiy,thinning and pruning), the mechanical properties of Pinus koraiensis plantations were measured and analyzed. The results showed that the effect of silvicultural measures(forest composioin,planning densiy,thinning) on mechanical properties(bending strength,crushing strength along the grain,tensil strength along the grain) of P. koraiensis plantations were remarkable,other strength and all strength of the pruning forest were not remarkable.In order to increase the mechanical properties of wood, growth-promoting and then get the better building lumber and glued lamination board, mixed stand, and with density of 1.5 m×1.5 m and 1.5 m×2.0 m, properly thinning and pruning could be selected. In order to manufacture furniture and bending-wood, density of 2.0 m×2.0 m could be selected.展开更多
结合树干解析取样,借助光学显微镜和扫描电镜,分别从宏观角度和微观角度研究了广玉兰木材的解剖构造;利用木材万能力学试验机,参照现行国家标准对广玉兰木材的力学性质进行了测定和分析。结果表明:广玉兰木材属于散孔材,管孔为圆形、椭...结合树干解析取样,借助光学显微镜和扫描电镜,分别从宏观角度和微观角度研究了广玉兰木材的解剖构造;利用木材万能力学试验机,参照现行国家标准对广玉兰木材的力学性质进行了测定和分析。结果表明:广玉兰木材属于散孔材,管孔为圆形、椭圆形,多数为复管孔;轴向薄壁组织量较多,为傍管类的环管束状,且多数为全部包围;木射线纺锤形,多为同型多列,偶有异形射线。广玉兰木材基本密度随着树干高度的增加整体上呈下降趋势,最大基本密度值出现在胸径处,为0.47 g/cm3。广玉兰木材端面硬度、径面硬度、弦面硬度、顺纹抗压强度、顺纹抗拉强度、抗弯强度和抗弯弹性模量分别为4.87 k N、3.84 k N、4.26 k N、35.02 MPa、114.97 MPa、83.30 MPa和10 500 MPa,为高档用材。展开更多
文摘For different silvicultural measures(forest composioin,planning densiy,thinning and pruning), the mechanical properties of Pinus koraiensis plantations were measured and analyzed. The results showed that the effect of silvicultural measures(forest composioin,planning densiy,thinning) on mechanical properties(bending strength,crushing strength along the grain,tensil strength along the grain) of P. koraiensis plantations were remarkable,other strength and all strength of the pruning forest were not remarkable.In order to increase the mechanical properties of wood, growth-promoting and then get the better building lumber and glued lamination board, mixed stand, and with density of 1.5 m×1.5 m and 1.5 m×2.0 m, properly thinning and pruning could be selected. In order to manufacture furniture and bending-wood, density of 2.0 m×2.0 m could be selected.
文摘结合树干解析取样,借助光学显微镜和扫描电镜,分别从宏观角度和微观角度研究了广玉兰木材的解剖构造;利用木材万能力学试验机,参照现行国家标准对广玉兰木材的力学性质进行了测定和分析。结果表明:广玉兰木材属于散孔材,管孔为圆形、椭圆形,多数为复管孔;轴向薄壁组织量较多,为傍管类的环管束状,且多数为全部包围;木射线纺锤形,多为同型多列,偶有异形射线。广玉兰木材基本密度随着树干高度的增加整体上呈下降趋势,最大基本密度值出现在胸径处,为0.47 g/cm3。广玉兰木材端面硬度、径面硬度、弦面硬度、顺纹抗压强度、顺纹抗拉强度、抗弯强度和抗弯弹性模量分别为4.87 k N、3.84 k N、4.26 k N、35.02 MPa、114.97 MPa、83.30 MPa和10 500 MPa,为高档用材。
