| 美洲黑杨新无性系木材细胞次生壁S_2层微纤丝角株内变异的初步研究 |
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| 引用本文： | 李火根,黄敏仁,阮锡根.美洲黑杨新无性系木材细胞次生壁S_2层微纤丝角株内变异的初步研究[J].西北林学院学报,1997(1). |
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| 作者姓名： | 李火根 黄敏仁 阮锡根 |
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| 作者单位： | 南京林业大学森林资源与环境学院，南京林业大学基础课部 |
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| 摘 要： | 对６年生美洲黑杨无性系３６６、３７０，Ｉ—６９的Ｓ２层微纤丝角（ＭＦＡ）进行了研究。ＭＦＡ在不同无性系间，同一年轮的不同高度之间存在显著差异；而胸高部位径向变异不显著。同一年轮的ＭＦＡ随高度增加而降低；在径向，ＭＦＡ有从髓心向外逐渐减小的趋势。从无性系平均看，三无性系ＭＦＡ的大小次序为３６６＜３７０＜Ｉ—６９。
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| 关 键 词： | 美洲黑杨 无性系 微纤丝角（MFA） 株内变异 |
On Variations Within Trees of Microfibril Angle in S 2 Layer of Cell Secondary Wall of Cottonwood |
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| Li Huogen,Huan Minren,Ruan Xigen.On Variations Within Trees of Microfibril Angle in S 2 Layer of Cell Secondary Wall of Cottonwood[J].Journal of Northwest Forestry University,1997(1). |
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| Authors: | Li Huogen Huan Minren Ruan Xigen |
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| Institution: | Nanjing Forestry University.Nanjing 210037 |
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| Abstract: | The variations within trees of microfibril angle(MFA) were inverstigated in three 6-year-old cottonwood clones: 366, 370, I-69. Following results were obtained:variations among clones, different height within growth rings for MFA were significant; however, no sighificant differences among radial directions within breast height were found; MFA of the same year decreased as height increased ,and the trend that MFA gradually decreased from pith to bark was also found; of the three cottonwood clones, the order of MFA were: 366<370
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| Keywords: | cottonwood clones microfibril angle(MFA) variation within trees |
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