Collapse-type shrinkage characteristics in plantation-grown eucalypts: I. Correlations of basic density and some structural indices with shrinkage and collapse properties

编号 zgly0000390643

文献类型 期刊论文

文献题名 Collapse-type shrinkage characteristics in plantation-grown eucalypts: I. Correlations of basic density and some structural indices with shrinkage and collapse properties

学科分类 220.99;林学其他学科

作者 WUYi-qiang  HAYASHIKazuo  LIUYuan  CAIYing-chun  SUGIMORIMasatoshi  LUOJian-ju 

作者单位 Faculty of Agriculture  Faculty of Agriculture College of Industry  Collegeof Material Science and Engmeenng  College of Forestry 

母体文献 林业研究: 英文版 

年卷期 2005,16(2)

页码 83-88

年份 2005 

分类号 S792.39  S781.2 

关键词 桉树人工林  木材皱缩型特性  基本密度  微纤丝角  单位胞壁收缩率  残余皱缩  总收缩率 

文摘内容 Collapse-type shrinkage is one of highly refractory drying defects in low-medium density plantation-grown eucalypt wood used as solid wood products. Basic density (BD), microfibril angle (MFA), double fibre cell wall thickness (DWT), proportion of ray parenchyma (RP), unit cell wall shrinkage, total shrinkage and residual collapse, which are associated with collapse-type shrinkage characteristics, were investigated by using simple regression method for three species of collapse-susceptible Eucalyptus urophyll, E. grandis and E.urophyllaxE.grandis, planted at Dong-Men Forest Farm in Guangxi autonomous region, China. The results indicated that : unit cell wall shrinkage had a extremely strong positive correlation with BD, moderately strong positive correlation with DWT, and a weakly or moderately negative correlation with RP and MFA; total shrinkage was positively correlated with BD, DWT and RP and negatively related to MFA, but not able to be predicted ideally by any examined factors alone owing to lower R^2 value (R^2≤0.5712); residual collapse was negatively correlated with BD and DWT, linearly positively correlated with MFA, and had strongly positive linear correlation with RP. It is concluded that BD can be used as single factor (R^2≥0.9412) to predicate unit cell wall shrinkage and RP is the relatively sound indicator for predicting residual collapse。