| 蓝桉、直干桉木材密度在家系内和株内的变异 |
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| 引用本文： | 刘金凤,李淡清,张必福,高永能.蓝桉、直干桉木材密度在家系内和株内的变异[J].西部林业科学,2001,1(1):11-17. |
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| 作者姓名： | 刘金凤 李淡清 张必福 高永能 |
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| 作者单位： | 1. 云南省林业科学院,
2. 云南省澄江县林业局, |
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| 基金项目： | 本项研究不无能为云南省应用基金（97C 065 M）资助的“蓝桉、直干桉木材密度和纤维长度遗传变异研究”的第3部分。 |
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| 摘 要： | 在蓝桉、直干桉子测林中各抽3个家系，从不同的区组按径阶等距抽样测定木材的密度，研究家系内木材密度的变异；在种子园中抽取蓝桉30株、直干桉36株作试材研究木材密度株内变异。结果表明蓝桉家系内不同径阶的木材密度差异不显著，直干桉极显著；蓝桉的木材密度在区组和家系间的差异都显著，而直干桉都不显著。株内不同方向的木材密度差异两树种均不显著，而不同高度和不同年龄的木材密度差异都极显著；在亲缘关系混杂的群体中两树种的树高和胸径与木材密度均呈负相关，而在3个蓝桉家系内，胸径与密度呈正相关，直干桉3个家系中两个呈正相关，1个呈负相关，但都不显著。为将这两个树种纸浆材的主伐年龄定为6年提供了充分的科学依据,且在2年生时对蓝桉、直干桉作早期选择可取得满意的效果，对直干桉尤为明显。
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| 关 键 词： | 蓝桉 直干桉 木材密度 家系内变异 株内变异 |
| 文章编号： | 1007-3353(2001)01-0011-07 |
| 修稿时间： | 2000年7月24日 |
Wood Density Variation of Eucalyptus globulus and E. maidenii
within Family and Individual Tree |
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| LIU Jinfeng,LI Danqing.Wood Density Variation of Eucalyptus globulus and E. maidenii
within Family and Individual Tree[J].Journal of West China Forestry Science,2001,1(1):11-17. |
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| Authors: | LIU Jinfeng LI Danqing |
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| Abstract: | Wood density variation of Eucalyptus globulus and E. maidenii within family was studied by equidistant sampling from different blocks which belonging to 3 families. Thirty E. globulus and 36 E. maidenii individuals from seed orchard were sampled to study the variation within individual tree. The results were the following. The E. globulus wood density of different diameter classes within the same family was slightly different, while that of the E. maidenii was significantly different. The wood density of E. globulus between different blocks and families were all significantly different, that of E. maidenii were not significantly different. The wood density variations between different orientations was not significantly different, those between different tree height and diameter class were significantly different. The DBH, tree height and wood density were negatively correlated in genetically mixed group of the two tested species. Within E. globulus family, DBH and wood density were positively correlated. Two of the studied E. maidenii families, DBH and wood density were positively correlated, another one family was negatively correlated. This study provided a scientific basis for six years old final cutting of E.globulus and E. maidenii pulp wood, the results also indicated that the suitable early selection age was two years old. |
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| Keywords: | Eucalyptus globulus E maidenii wood density variation within family variation within individual |
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