摘要
白蜡木（ＦｒａｘｉｎｕｓｒｈｙｎｃｈｏｐｙｌｌａＨａｎｃｅ）是小径级、不成材树种。通过对吉林省白蜡木的解剖特征、物理性能、力学性能的综合分析得出：白蜡木早材导管分子的平均为２４１μｍ，晚材为６７．８μｍ，木纤维的长度为１２９０μｍ，薄壁细胞含量少，木射线不发达；白蜡木的基本密度为０．６３ｇ／ｃｍ￣３，气干密度为０．７２ｇ／ｃｍ￣３，差异干缩为１．６６３；白蜡木顺纹抗拉强度为１８８ＭＰａ，版纹抗压强度为４８．９３ＭＰａ，抗弯强度为９９．３３ＭＰａ，冲击韧性为１７５．６ｋＪ／ｍ￣２．白蜡木顺纹抗拉强度比水曲柳（Ｆｒａｘｉｎｕｓ，ｍａｘｄｓｈｕｒｉｃａＲｕｐｒ）高７．３％，比椴木（ＴｉｌｉａａｍｕｒｅｎｓｉｓＲｕｐｒ）高１２．１％，白蜡木的弯曲能力明显高于其它阔叶材，如榆木（Ｕｌｍｕｓｄａｌｕｄｉａｎａｖａｒ．ＪａｐｏｎｉｃａＮａｋａｉ）．此项研究为白蜡木资源的开发与利用提供了充分的理论依据。
Fraxinus rhynchopylla Hance is a spiece of tree which is small diameter and good一br一nothing。The anatomical charactors,physical properties and mechanical properties of Fraxinus rhynchopylla Hance inJilin province werer analysized comprehensively, the results whow that the width of the spring wcod vessels ofFraxinus rhyrchopylla Hance is 241 cm ,the width of the late wcod vessels of Fraxinus rhynchopylla Hanceis 67. 8 cm,the length of wood fiber is1290 cm,the amount of axial parenchyma and wood ray are quite rare。The fundamental density of Fraxinus rhychopylla Hance is 0. 63g/cm3 air-dried density is 0. 72g /cm3,differ-ence dry contract ratio is 1. 633;the tensiom strength parallel to the grain of Fraxinus rhynchopylla Hance is188MPa,the compressive strength parellel to the grain of Fraxinus rhynchopylla Hance is 48.93MPa,theblending strength was 99.33MPa,the collision strength is 175.6kJ/m3,the tension strength paralla to thegrain of Fraxinus rhynchopylla Hance is greater by7.3 % than Fraxinus mandshurica Rupr and greater by12.1%than Tilia amurensis Rupr The bending properties of Fraxinus rhynchopylla Hance is much greaterthan hard wood else,for example,Ulmus davidiana var japonica, The study provides adequate thooricalfundamental for the exploitation and the utilization of Fratiusrky chopylla Hance resources。
