【摘要】 该研究主要对 5种种源新培育速生白桦木材的弦向、径向、体积全干干缩率和差异干缩及弦向、径向、体积气干干缩率和差异干缩等 4个性状进行了测试 ,并根据测试结果进行了变异分析及方差分析 .结果表明 :据此可用来选育纵向干缩率小、差异干缩小、尺寸稳定性好的优良树种更多还原

【Abstract】 This study tested 6 drying shrinkages of white birch wood(\%Betula platyphylla\%) from plantations.The 6 drying shrinkages include tangential shrinkage, radial shrinkage, and volume shrinkage in oven and air dry conditions. Five birch provenances were selected as testing materials. Variance analysis indicates that we can select the good provenance for the drying shrinkages of white birch are very small, the variance is not great, and the dimension stability is good.更多还原