不同黑杨无性系及树干高度的木材顺纹抗压强度研究  

Different Populus deltoides Marsh. Clones and Stem Heights: Longitudinal Compressive Strength

作　　者：杨艳[1] 汤玉喜[1] 唐洁[1] 李永进[1] 吴敏[1] Yang Yan, Tang Yuxi, Tang Jie, Li Yongjin, Wu Min(Hunan Academy of Forestry Sciences, Changsha 41000)

机构地区：[1]湖南省林业科学院,长沙410004

出　　处：《中国农学通报》2018年第8期46-50,共5页Chinese Agricultural Science Bulletin

基　　金：湖南省林业科技计划项目"杨树工程结构材定向培育及增值利用关键技术研究与示范"(XLK201506);"十三五"林业资源培育及高效利用技术创新重点专项"洞庭湖区美洲黑杨工业资源材高效培育技术研究"(2016YFD0600402-2)

摘　　要：为探明黑杨无性系间及个体木材顺纹抗压强度的变异情况,进一步拓宽黑杨木材开发利用途径,笔者对15年生的5个黑杨无性系的生长性状以及木材顺纹抗压强度进行测定分析。结果表明:不同黑杨无性系间木材顺纹抗压强度存在极显著差异,无性系内不同树干高度木材顺纹抗压强度差异显著。供试各无性系木材顺纹抗压强度均达到41 MPa以上,无性系83的木材顺纹抗压强度最大,为48.44 MPa;无性系69的木材顺纹抗压强度最小,为41.06 MPa。各无性系木材顺纹压力强度沿树干高度变化基本一致,都是随着树干高度的增加木材顺纹抗压强度呈逐渐增加的趋势,但无性系内木材顺纹抗压强度在不同树干高度上的变异差异显著。黑杨无性系木材顺纹抗压强度与胸径呈负相关,与树高呈正相关,但均未达到显著水平;与单株材积基本不相关,相关系数仅为0.106。The paper aims to investigate the longitudinal compressive strength variation of wood in different clones and stem heights of Populus deltoides Marsh. and further broaden its development and utilization. The authors determined and analyzed the growth traits and longitudinal compressive strength of 5 clones 15 years old Populus deltoides Marsh.. The results showed that： the difference of longitudinal compressive strength wassignificant among different Populus deltoides Marsh. clones; longitudinal compressive strength of different stemheights differed significantly within clones; longitudinal compressive strength of different tested clones allreached above 41 MPa, and that of clone 83 was the largest, which was 48.44 MPa; that of clone 69 was thesmallest which also reached 41.06 MPa; the variation tendency of the strength along the tree height was in goodagreement with different clones, which was gradually increasing with the tree height increase; however, thestrength at different tree heights was different significantly within the same clone; the longitudinal compressivestrength of Populus deltoides Marsh. was negatively correlated with DBH and positively correlated with treeheight, both were not significant; the correlation coefficient was 0.106 between the strength and the single tree volume, indicating that they had no correlation.

关 键 词：黑杨 无性系 树干高度 顺纹抗压强度 

分 类 号：S781[农业科学—木材科学与技术]