741杨生长与木材品质特性  

Growth and Wood Property of Poplar 741

作　　者：田晓明[1] 谢进[1] 屈龙[1] 刘士畅[1] 李建梅[1] 杜洪双[2] 蒋湘宁[3] 盖颖[3] 

机构地区：[1]北京林业大学生物科学与技术学院,北京100083 [2]北华大学林学院,吉林132013 [3]国家林业局树木花卉育种与生物工程重点实验室、林木育种国家工程实验室,北京100083

出　　处：《林业科学》2013年第3期129-135,共7页Scientia Silvae Sinicae

基　　金：北京林业大学新进青年教师基金项目(2010BLX03);国家自然科学基金重点项目(NSF30630053)

摘　　要：对741杨的生长节律、细胞壁化学组成、解剖结构、物理力学性质进行观察和测定。结果表明:741杨生长持续期长,生长速度快,株高、茎粗和单株材积生长量在生长旺季具有速生的特点;在扫描电子显微镜下观察,741杨纤维细胞壁较薄,断面形状多为圆形或多边形,导管多为孔纹型导管,木射线为单列;741杨茎细胞壁中S-木质素含量明显高于G-木质素,随着树龄的增加,S-木质素的含量逐年增加。741杨基本密度小于毛白杨成熟材,体积干缩率在杨属中处于较低水平,抗弯强度与同类型杨树木材相比处于较高水平,冲击韧性按我国主要用材树种冲击韧性大小的分类属中等。741杨可广泛应用于绿化、建筑、家具、胶合板、造纸等行业。Growth rhythm, cell wall composition, anatomical structure, physical and mechanical properties of poplar 741 were observed and measured. The results showed that, poplar 741 had a long growth period, high growth rate, and plant height, stem diameter and the growth rate of individual volume in growing season had the obvious characteristics of fast-growing. With the scanning electro microscope analysis, we found that fiber cell wall was thin, the shape of its cross section was circular or polygonal, the vessel cells were pitted vessel, wood rays were usually uniseriate; S-lignin content in stem cell wall of poplar 741 was markedly higher than the G-lignin, moreover, with the growing of the poplar 741, the S- lignin content increased year by year. Basic density of poplar 741 was less than Populus wood, volume shrinkage rate was in a low level, the flexural strength was higher than other kind of Populus wood. According to national standard of impact toughness in wood, the impact toughness of poplar 741 was medium among the main timber tree species. Poplar 741 could be widely applied in green, construction, furniture, plywood, paper and other industries.

关 键 词：741杨 生长节律 解剖结构 化学组成 物理力学性质 

分 类 号：S781[农业科学—木材科学与技术]