9种西南乡土杨树干燥特性比较  

Comparison of Drying Characteristics of Nine Native Poplars from Southwesten China

作　　者：罗朋朋 陈太安[1] 胡志坚[1] 和杰[1] 

机构地区：[1]西南林业大学材料工程学院,云南昆明650224

出　　处：《西南林业大学学报（自然科学）》2016年第1期126-130,共5页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家林业公益性行业专项项目(201104076)资助;云南省应用基础研究重点项目(2011FA021)资助

摘　　要：以9种西南地区乡土杨树为对象,研究其与干燥有关的材性和百度法干燥特性。结果表明:9种西南乡土杨树均具有较为明显的湿心材,且含水率在树种间存在较大差异,湿心材和边材水分含量差异较大;9种杨树均属于低密度木材,径向气干干缩率和弦向干缩率与密度之间的相关性不明显,湿心材与边材的差异规律不明显;湿心材和密度是影响西南地区乡土杨树用材干燥的2个主要因素,皱缩是其易发的干燥缺陷。根据9种西南乡土杨树的材性和干燥特性,拟定了其预报干燥基准。To explore and use the native poplar resources in southwest China, the 100 C drying characteristicsand the drying related properties of 9 native poplars were investigated. The results show that typical wet heartwoodwith high moisture content （MC） is found in native poplars. And there is a big difference of MC between species ofpoplar that is same as between wet heartwood and sapwood. Besides, nine native poplars belong to the low densitycategory. The correlation betweenair dried shrinkage coefficient in radial or in tangential and air dried density is notobvious. The difference in shrinkage of wet heartwood and sapwood is also not significant. Wet heartwood and den-sity are the main two factors affecting the drying behavior of 9 southwest native poplar woods while collapse is ofcommon occurrence during poplar wood drying. Based on the above results, the drying schedule and some adviceson drying of 9 native poplars were given in the paper.

关 键 词：杨树 材性 干燥特性 湿心材 干燥基准 

分 类 号：S781.71[农业科学—木材科学与技术]