木荚红豆树木材密度和纤维形态的径向变异  

Radial Variation of Density and Fiber Morphology of Ormosia xylocarpa Wood

作　　者：彭彪[1] 谢世春 彭东辉[3] 盖新敏 周逢芳[1] 

机构地区：[1]宁德师专生物应用技术研究所,福建宁德352100 [2]福建省宁德市瑞春农业科技开发有限公司,福建周宁355400 [3]福建农林大学,福建福州350000 [4]福建省宁德市林业局,福建宁德352100

出　　处：《安徽农业科学》2010年第17期9326-9328,共3页Journal of Anhui Agricultural Sciences

基　　金：福建省自然科学基金资助项目(2007J0066);宁德师范学院资助项目(2006Y001);宁德市科技局资助项目(2009-0027)

摘　　要：[目的]探讨木荚红豆树相关材性随树龄的变化规律并探明其工艺成熟期。[方法]用排水法测定各个小试样的基本密度,在数码显微镜下测定其纤维长度和宽度。[结果]从髓心至42年轮,木荚红豆树木材基本密度从0.48 g/cm3增大到0.56 g/cm3;从45~63年轮,其基本密度略有减小。木荚红豆树木材纤维长度随轮龄的增大而增大,在1~21年轮间增加较快,由888μm增加至1 206μm;在21~42年轮间增加缓慢,由1 206μm增至1 390μm,42年后呈相对稳定状态。木荚红豆木材纤维宽度在21.2~26.5μm波动。木荚红豆树木材纤维长宽比的变化范围为37.51~62.50,纤维长宽比随轮龄的增大而增大,在1~18年轮间增加较快,在18~42年间增加缓慢,42年后呈相对稳定状态。[结论]木荚红豆树木材密度和纤维长度随树龄的增大而增大,其纤维宽度随轮龄变化较小,其工艺成熟期为42年。[Objective]The aim was to discuss the law of the relative stuff of Ormosia xylocarpa changing with tree age and ascertain its technical maturity period.[Method]The basic density of each small sample was determined by using draining method and their fiber lengths and widths were determined under fraction microscope.[Result]From pith to the 42nd annual ring,the basic density of O.xylocarpa wood was increased from 0.48 g/cm3 to 0.56 g/cm3.From the 45th to the 63rd annual ring,its basic density was reduced a little.The fiber length of O.xylocarpa wood was increased along with increase of ring age;it was increased from 888 μm to 1 206 μm faster between 1st and 21st annual rings;it was increased from 1 206 μm to 1 390 μm slowly between 21st and 42nd annual rings;they showed relatively stable state after 42 years.The fiber width of O.xylocarpa wood was fluctuated between 21.2 and 26.5 μm.The fiber length-width ratio of O.xylocarpa wood was changed in the range of 37.51～62.50;it was increased along with increase of ring age,increased faster between 1st and 18th annual rings,increased slowly between 18th and 42nd annual rings and showed relatively stable state after 42 years.[Conclusion]The density and fiber length of O.xylocarpa wood was increased along with increase of tree age,its fiber width changed less with ring age and its technical maturity period was 42 years.

关 键 词：木荚红豆树 基本密度 纤维形态 树龄 

分 类 号：S781[农业科学—木材科学与技术]