| Study on Variation Pattern of Microfibril Angle in Chinese Fir |
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| 引用本文： | HUANG Yanhui ZHAO Rongjun FEI Benhua Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,P.R.China.. Study on Variation Pattern of Microfibril Angle in Chinese Fir[J]. 中国林业科技(英文版), 2007, 6(3): 60-65 |
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| 作者姓名： | HUANG Yanhui ZHAO Rongjun FEI Benhua Research Institute of Wood Industry Chinese Academy of Forestry Beijing 100091 P.R.China. |
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| 作者单位： | HUANG Yanhui ZHAO Rongjun FEI Benhua Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing 100091，P.R.China. |
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| 摘 要： | Microfibril angle （MFA） in Chinese fir was tested by X-ray diffraction apparatus and calculated by computer software. The results were as follows： MFA was controlled strongly by inheritance, and there was no significant difference in MFA among interspecies, juvenile and mature wood. In the longitudinal, MFA reduces with the height rising from 0 to 5.5 m, especially in the heights from 0 to 1.5 m. The values of MFA are nearly consistence from 1.5 to 7.5 m. The variation range was between 10.82°and 12.57°from 1.5 to 7.5 m, R2 of power equation achieved 0.932 1, and analysis of variance indicated that the variation of MFA was not significant from 1.5 to 7.5 m, The age of the trees had an important influence on MFA, consequently, the difference in MFA was significant among annual rings in radial, which was maximal in near pith and reduced rapidly from the pith to sapwood, and its decline tendency was slow beyond the ninth annual ring. MFA reached minimum value at the 15th annual ring, and the difference reached more than 20° and R^2 of binomial equation achieved 0.755 6.
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| 关 键 词： | 中国杉 微纤维 X射线辐射 变化模式 |
Study on Variation Pattern of Microfibril Angle in Chinese Fir |
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| HUANG Yanhui ZHAO Rongjun FEI Benhua. Study on Variation Pattern of Microfibril Angle in Chinese Fir[J]. Chinese Forestry Science and Technology, 2007, 6(3): 60-65 |
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| Authors: | HUANG Yanhui ZHAO Rongjun FEI Benhua |
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| Affiliation: | Research Institute of Wood Industry Chinese Academy of Forestry Beijing 100091,P.R.China. |
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| Abstract: | Microfibril angle (MFA) in Chinese fir was tested by X-ray diffraction apparatus and calculated by computer software. The results were as follows: MFA was controlled strongly by inheritance, and there was no significant difference in MFA among interspecies, juvenile and mature wood. In the longitudinal, MFA reduces with the height rising from 0 to 5.5 m, especially in the heights from 0 to 1.5 m. The values of MFA are nearly consistence from 1.5 to 7.5 m. The variation range was between 10.82o and 12.57o from 1.5 to 7.5 m, R2 of power equation achieved 0.932 1, and analysis of variance indicated that the variation of MFA was not significant from 1.5 to 7.5 m. The age of the trees had an important influence on MFA, consequently, the difference in MFA was significant among annual rings in radial, which was maximal in near pith and reduced rapidly from the pith to sapwood, and its decline tendency was slow beyond the ninth annual ring. MFA reached minimum value at the 15th annual ring, and the difference reached more than 20o and R2 of binomial equation achieved 0.755 6. |
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| Keywords: | Chinese fir (Cunninghamia lanceolata) microfibril angle X-ray diffraction variation pattern |
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