作者机构：
[李贤军] Material Science and Engineering School, Central-South Forestry Science and Technology University, Changsha 410004, China;[李延军] School of Engineering, Zhejiang Forestry College, Lin'an 311300, China;[张璧光; 李文军; 李贤军] College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
通讯机构：
Material Science and Engineering School, Central-South Forestry Science and Technology University, China
期刊：
JOURNAL OF WOOD SCIENCE,2006年52(3):187-194 ISSN：1435-0211
通讯作者：
Hayashi, K
作者机构：
[Liu, Yuan] Department of Wood Science and Technology, Central South Forestry University, Changsha 410000, China;[Cai, Yingchun] Department of Wood Science and Technology, College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China;[Sugimori, Masatoshi; Hayashi, Kazuo] Department of Forest Resources, Faculty of Agriculture, Ehime University, Tarumi, Matsuyama 790-8566, Japan;[Wu, Yi-Qiang] United Graduate School of Agricultural Sciences, Ehime University, Matsuyama 790-8566, Japan
通讯机构：
[Hayashi, K ] ;Ehime Univ, Fac Agr, Dept Forest Resources, Matsuyama, Ehime 7908566, Japan.
会议名称：
54th Annual Meeting of the Japan-Wood-Research-Society
作者机构：
Department of Wood Science and Technology, Central South Forestry University, changsha, China The Un;The United Graduated School of Agricultural Sciences, Ehime University, Japan;Department of Wood Science and Technology, Central South Forestry University, changsha, China;College of Forestry, Guangxi University, Nanning, China
会议名称：
The International Conference on Plantation Eucalyptus(桉树国际会议)
会议时间：
2005-12-01
会议地点：
广东湛江
会议论文集名称：
The International Conference on Plantation Eucalyp
摘要：
The effects of continuous and intermittent drying regimes on the total shrinkage and collapse have been investigated for six species of difficult-to-dry planted Eucalyptus timbers. The results have shown that total shrinkage and collapse in all eucalypt woods examined were greater for continuous drying than intermittent drying with the exception of an intermittent drying run based on change of relative humidity (RH). Periodic cycling of RH can lead to the increase of total shrinkage and collapse in green/saturated wood in higher drying temperature conditions (more men 60℃) rather than increasing collapse recovery and was especially obvious for lower-density eucalypts. Total shrinkage and collapse increase with increasing drying temperature, in both continuous and intermittent drying regimes, while the increasing magnitude of both parameters becomes apparently larger for continuous drying than for the intermittent drying regime, in particular for higher temperature conditions. However, it is possible to elevate drying temperature to reduce drying time for the intermittent drying regime. Increasing drying duration at each intermittent drying period had a greater effect on total shrinkage and collapse for all eucalypt wood examined. When a drying duration of six hours at an intermittent drying period is used, the differences in shrinkage and collapse between continuous and intermittent drying regimes are very slight. The duration of an intermittent drying period has a comparatively larger effect on total shrinkage and collapse for five lower-density eucalypt species, but a smaller effect on two higher-density eucalypts that were included in the study. Accordingly, we may draw a conclusion that an intermittent drying regime is very likely to be a potential drying practice for collapse-prone lower-density plantation-grown eucalypt timbers.
