| 人工林尾巨案树木表面轴向生长应变 |
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| 引用本文： | 刘晓丽,姜笑梅,殷亚方.人工林尾巨案树木表面轴向生长应变[J].北京林业大学学报,2005,27(6):95-98. |
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| 作者姓名： | 刘晓丽 姜笑梅 殷亚方 |
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| 作者单位： | 1.1北京林业大学资源与环境学院2 浙江省森林病虫防治检疫站 |
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| 基金项目： | 国际热带林木组织(ITTO)资助项目
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国家自然科学基金 |
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| 摘 要： | 为评估人工林尾巨案生长应力水平并揭示其变异情况，采用应变片法对其表面轴向生长应变进行了测试.研究表明，表面轴向生长应变为拉应变，活立木胸高处表面轴向生长应变平均值基本分布在650×10-6～1 100×10-6之间；生长应变的测试一般需要3 min左右，这时应力释放完毕，应变值达到稳定.尾巨案两个家系间及树干两个方位（南、北向）间的表面轴向生长应变差异不显著，沿树高变化不明显.
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| 关 键 词： | 应变片法 人工林尾巨桉 表面轴向生长应变 |
| 文章编号： | 1000-1522（2005）06-0095-04 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 2004年12月29日 |
Surface longitudinal growth strain of plantation Eucalyptus urophylla × E. Grandis |
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| LIU Xiao-li,JIANG Xiao-mei,YIN Ya-fang.Surface longitudinal growth strain of plantation Eucalyptus urophylla × E. Grandis[J].Journal of Beijing Forestry University,2005,27(6):95-98. |
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| Authors: | LIU Xiao-li JIANG Xiao-mei YIN Ya-fang |
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| Institution: | Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, P. R. China. |
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| Abstract: | Surface longitudinal growth strain (SLGS) of plantation E. urophylla×E.grandis was measured by using strain gauge for evaluating the magnitude and variance of SLGS Results show that SLGS is a kind of tensile strain and the mean value of SLGS of standing trees distributes between 650×10-6 and 1 100×10-6 mainly at 1.3 m height. Also, it needs about 3 min to measure SLGS normally since at this time,the strain releases completety and the value of SLGS turns to be stable.It is also found that there are no significant differences not only between two families of E.urophylla×E.grandis, but also two orientations (North and South)of stem and the relationship of SLGS with tree height is weak. |
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| Keywords: | strain gauge method plantation E urophylla×E grandis surface longitudinal growth strain |
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