摘要
该文从在我国分布较广的辽东栎和栓皮栎入手，研究了栎属木材干燥中两个方面的内容：栎属木材的基本干燥特性和不同干燥介质条件下材质的变异性．实验结果表明：栎属木材的基本密度较大、干缩率较大，在干燥过程中初期开裂发生得较早、截面变形严重．辽东栎和栓皮栎成材的基本密度分别为０６７３ｇ／ｃｍ３和０７１３ｇ／ｃｍ３；差异干缩率分别为１７２和２０２．在温度为５５℃、相对湿度为８０％左右的条件下干燥，将导致栎属木材变形和解剖分子破坏．在相同的干燥介质条件下，栎属木材各解剖分子的变形程度不同．其中轴向薄壁组织变形最严重，其次是管胞。
Two oak species (Quercus Liaotungensis Koidz and Quercus variabilis Bl) were taken for this study because of their wide distribution in China. Two aspects about oak timber drying were introduced in this paper:①the basic drying characteristics of oak timber;②the variability of timber quality with different drying medium conditions. The experiment results show that for the oak timber with higher basic density and more shrinkage the initial checks in drying process occurred earlier,and the cross section deformation was serious. The basic densities of Q.liaotungensis Koidz and Q. variabils Bl were 0 673 and 0 713 g/cm 3,and the differential shrinkages were 1 72 and 2 02, respectively. Under the conditions with the temperature of 55℃ and the relative humidity of about 80%, the drying caused deformation and anatomical element destruction in the oak timber. Under the same drying medium condition, the degree of deformation of the different oak anatomical elements was different. The deformation of parenchyma was the most serious, then the tracheids, vessels and wood fibers.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1997年第1期84-88,共5页
Journal of Beijing Forestry University
关键词
干燥介质
干缩率
材质
栎属
drying medium, shrinkage,anatomical element,timber quality
