江汉平原水杉、池杉、落羽杉物理力学性能比较研究

Study on the physical and mechanical properties of Metasequoia glyptostroboides,Taxodium ascendens, Taxodium distichum in Jianghan plain

摘要:

摘要：对江汉平原水杉、池杉、落羽杉人工林物理力学性能进行了研究，结果表明：落羽杉的密度和硬度最大；落羽杉、水杉、池杉的抗弯强度差异不大；水杉的弹性模量最大，约为落羽杉的2.3倍，落羽杉的弹性模量与池杉的比较接近。南北方向对水杉、池杉、落羽杉的密度、顺纹抗压强度在5%水平上差异均不显著，对池杉、水杉抗弯强度在5%水平上差异不显著，对落羽杉抗弯强度在1%水平上差异显著，对落羽杉、池杉的弹性模量在1%水平上差异显著，对水杉的弹性模量在5%水平上差异不显著。三杉南北面近树皮处木材的密度、抗弯强度、弹性模量、顺纹抗压强度均大于髓心处。对水杉、池杉、落羽杉物理力学性能比较研究，旨在为其培育及合理利用提供依据。

Abstract:

Abstracts:The physical and mechanical properties of Metasequoia glyptostroboides,Taxodium ascendens,Taxodium distichum in Jianghan plain were studied. The results were as follows.The density and hardness of Taxodium distichum were the highest，while their MOR (modulus of rupture)were almost the same. The MOE (modulus of elasticity) of Metasequoia glyptostroboides was 2.3 times as much as that of Taxodium distichum.However,the MOE of Taxodium distichum was nearly the same as that of Taxodium ascendens.On the other hand,physical and mechanical properties difference between different direction was researched. Their density and compression strength parallel to grain had no statistically significant difference (at 5% level) between north and south directions. The MOR of Taxodium ascendens and Metasequoia glyptostroboides had no significant difference at 5% level, while the MOR of Taxodium distichum was significant ly different at 1% level.The MOE of Taxodium distichum and Taxodium ascendens had significant difference at 1% level,while the MOE of Metasequoia glyptostroboides was not significantly different at 5% level.In addition, the properties of outer wood were higher than that of core wood.The study on their physical and mechanical properties aimed to provide basis for their cultivation and effective utilization.