【摘要】 为了给人工林杉木选育和合理利用提供依据,以3个杉木(Cunninghamia lanceolata)无性系为研究对象,测试分析管胞长度、宽度和长宽比以及单根管胞拉伸强度、拉伸弹性模量的变异规律。结果表明,管胞长度、长宽比、拉伸强度、拉伸弹性模量,在株内径向由髓心向外逐渐增大,在株内纵向1.3～5.5 m段自下向上逐渐增大。管胞的拉伸强度、拉伸弹性模量,与管胞长度、长宽比均呈极显著正相关(P<0.01)。杉木无性系管胞形态和单根管胞拉伸性能在幼龄与成熟时期材性呈现显著差异。更多还原

【Abstract】 In order to provide scientific support for the breeding selection and reasonable utilization of Chinese fir(Cunninghamia lanceolata), three Chinese fir clones were selected to investigate the variation of tracheid length, tracheid width, tracheid length-width ratio, tensile strength, and tensile modulus of elasticity(MOE) of single tracheid. The results showed that tracheid length, length-width ratio, tensile strength, and tensile MOE increased gradually from pith to the bark, and increased gradually from the breast height 1.3 m to 5.5 m in longitudinal variation. Single tracheid tensile strength and tensile MOE showed significantly positively correlation to their tracheid length and length-width ratio(P<0.01).Tracheid morphology and tensile properties had significant differences in juvenile and mature wood.更多还原