| 幼龄雪松干形的变异性 |
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| 引用本文： | 赵西平,周洋,郭平平.幼龄雪松干形的变异性[J].福建林业科技,2013,40(1):43-45,93. |
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| 作者姓名： | 赵西平 周洋 郭平平 |
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| 作者单位： | 1. 河南科技大学林学院,河南洛阳,471003
2. 北京林业大学林学院,北京,100083 |
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| 基金项目： | 国家自然科学基金项目(31000265)资助 |
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| 摘 要： | 以16棵11年生的雪松为对象,基于树干解析方法,测算树干的形率,研究雪松人工林株间和株内的干形变异。结果表明:雪松人工林株间的胸高形率差异随着年龄的增加而减小,10年后的胸高形率可以作为雪松立木干形的特征;在雪松株内,希费尔形率沿树干向上线性减小,变异系数为50.5%;胸高形率随年龄的增加呈非线性减小,为典型的反"J"形曲线。另外,探讨了雪松干形变异的成因。
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| 关 键 词： | 雪松 干形 形率 变异性 |
The Variation of Stem Form of Juvenile Cedar |
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| ZHAO Xi-ping,ZHOU Yang,GUO Ping-ping.The Variation of Stem Form of Juvenile Cedar[J].Journal of Fujian Forestry Science and Technology,2013,40(1):43-45,93. |
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| Authors: | ZHAO Xi-ping ZHOU Yang GUO Ping-ping |
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| Institution: | 1(1.Forestry College,Henan University of Science and Technology,Luoyang 471003,Henan,China; 2.Forestry College,Beijing Forestry University,Beijing 100083,China) |
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| Abstract: | Based on stem analysis of 16 11-year-old deodar cedar(Cedrus deodara(Roxb.) G.Don),the form quotient were calculated to study the variation of stem form.The results showed that the variability of form quotient for DBH among trees decreased with growing.The form quotient for DBH was steady relatively after the 10th year,and that could be as the characteristics of stem form.The form quotient decreased linearly along the trunk upward,and the coefficient of variation was 50.5%.The form quotient nonlinear reduced with increase of age,and the curve was an inverse J type.In addition,the cause of variation for the deodar cedar stem form was discussed. |
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| Keywords: | Cedar stem form form quotient variability |
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