文献类型：期刊文献

英文题名：VARIATION OF MICROFIBRIL ANGLE IN PLANTATION TREES OF CUNNINGHAMIA LANCEOLATA DETERMINED BY PIT APERTURES AND X-RAY DIFFRACTION

作者：Yin, Yafang[1] Song, Kunlin[1] Liu, Bo[1] Jiang, Xiaomei[1]

第一作者：殷亚方

通信作者：Jiang, XM[1]

机构：[1]Chinese Acad Forestry, Wood Anat & Utilizat Grp, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2011

卷号：32

期号：1

起止页码：77-87

外文期刊名：IAWA JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000287891600007)】；

基金：This study was supported financially by the project of the Chinese Academy of Forestry (No. CAFYBB2007016) and the project of the National Natural Science Foundation (No. 30972303). The technical help from M. Xu of the Chinese Research Institute of Wood Industry, Chinese Academy of Forestry is gratefully acknowledged. We thank Dr. L. Donaldson of SCION, New Zealand, and Dr. K. Gamstedt and E. Bergstrom of the Royal Institute of Technology. Sweden, for their comments on the manuscript.

语种：英文

外文关键词：Pit aperture; X-ray diffraction; microfibril angle; variation; Cunninghamia lanceolata

摘要：Microfibril angle (MFA) is an important ultrastructural feature of the wood cell wall that provides insight into tree growth and wood quality. Unfortunately, it is a property whose value is sensitive to the method of measurement. The aims of this study are to clarify and compare the variation of MFA in Chinese fir [Canninghatnia lanceolata (Lamb.) Hook.] plantation trees by using the pit aperture (PA) and X-ray diffraction (XRD) methods. A decrease in the average MFA from 25 degrees to 12 degrees as determined by PA and from 15 degrees to 9 degrees as determined by XRD was shown from growth ring 2 to ring 26. When measured at various stem heights up to 5.3 m, the MFA decreased from 18 degrees to 15 degrees using PA and from 12 degrees to 9 degrees using XRD. The results show that XRD tended to measure lower MFA values both in the juvenile and mature wood than PA. The majority of within-tree variation in MFA is mainly attributed to the difference between the juvenile and mature wood.