长江滩地杨木密度和干缩性的研究  

Density and shrinkage of poplar wood grown on the riverside of Yangtze River

作　　者：罗真付[1] 潘彪[1] 陆步云[1] 张雪峰[1] 陈施羽[1] 

机构地区：[1]南京林业大学木材工业学院,南京210037

出　　处：《林业科技开发》2012年第2期60-62,共3页China Forestry Science and Technology

基　　金：国家"十一五"科技支撑计划项目"杨木的高效利用研究"(编号:2006BAD03A1505-1);江苏高校优势学科建设工程资助项目

摘　　要：对安庆段长江滩地I-72杨的密度和干缩性进行了研究。结果表明:I-72杨的气干密度、全干密度和基本密度分别为0.454 g/cm3、0.415 g/cm3和0.364 g/cm3;I-72杨木材密度的径向变异为自髓心向外,最初递减,然后再向外层递增;轴向变异为沿树干向上逐渐增加;I-72杨的径向、弦向和体积全干缩率分别为3.917%、8.093%和12.138%,体积干缩系数为0.169,差异干缩为2.107;I-72杨5.3 m高度处的径向、弦向和体积全干缩率测量值均大于1.3 m高度处的测量值。The density and shrinkage of I-72 poplar wood grown on the riverside of Yangtze River were analyzed in this study.The results showed that the air-dried density,oven-dried density and basic density were 0.454 g/cm3,0.415 g/cm3 and 0.364 g/cm3,respectively.Measuring from the pith,the density of I-72 poplar wood decreased at first and then increased along the radial direction.In axial direction,the density increased gradually from the base to the top.The radial,tangential and volumetric shrinkage of poplar wood were 3.917%,8.093% and 12.138%,respectively.The volumetric shrinkage coefficient was 0.169.The ratio of tangential shrinkage to radial shrinkage was 2.107.The radial,tangential and volumetric shrinkages of poplar at the height of 5.3 m were all higher than those at the height of 1.3 m.

关 键 词：I-72杨 密度 干缩性 变异 

分 类 号：S791.27[农业科学—林木遗传育种]