摘要
该文通过对红锥和西南桦人工林木材南北向、不同高度位置、不同径向位置横向干缩 (包括弦、径向 )的测量 ,讨论分析了以上 3个因素对上述两种木材横向干缩率的影响 .研究结果表明 ,南北向的不同对红锥和西南桦人工林木材的干缩均无显著影响 ;高度位置的不同对红锥径、弦向干缩影响均不显著 ,而对西南桦径、弦向干缩的影响极为显著 ;径向位置的不同对红锥人工林木材的径、弦向干缩及西南桦的弦向干缩无显著影响 ,但对西南桦的径向干缩则有极显著影响 .
The transverse shrinkages (tangential and radial shrinkage) of plantation-grown Castanopsis hystrix and Betula alnoides in different directions (north or south), tree heights and radial directions were investigated. The effect of these factors on the transverse shrinkage was analyzed and discussed. The results show that there is no significant difference of shrinkage (tangential and radial) between the samples from north and south directions for both species. There is a marked difference of transverse shrinkage at different heights for Betula alnoides, with no obvious difference for Castanopsis hystrix. There is a remarkable difference of radial shrinkage at different radial positions in Betula alnoides.
出处
《北京林业大学学报》
EI
CAS
CSCD
北大核心
2005年第1期6-9,共4页
Journal of Beijing Forestry University
基金
"十五"国家科技攻关计划项目子课题 (2 0 0 2BA5 15B0 70 4) .
