文献类型：期刊文献

英文题名：INFLUENCE OF MICROFIBRIL ANGLE ON WITHIN-TREE VARIATIONS IN THE MECHANICAL PROPERTIES OF CHINESE FIR (CUNNINGHAMIA LANCEOLATA)

作者：Yin, Yafang[1] Bian, Mingming[1,2] Song, Kunlin[1] Xiao, Fuming[3] Jiang Xiaomei[1]

第一作者：殷亚方

通信作者：Jiang, XM[1]

机构：[1]Chinese Acad Forestry, Chinese Res Inst Wood Ind, Wood Anat & Utilizat Dept, Beijing 100091, Peoples R China;[2]State Acad Forestry Adm, Beijing 102600, Peoples R China;[3]Jiangxi Acad Forestry, Nanchang 330032, Jiangxi, Peoples R China

年份：2011

卷号：32

期号：4

起止页码：431-442

外文期刊名：IAWA JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000297659300003)】；

基金：This work was supported financially by a project at the Chinese National Natural Science Foundation (No. 30972303) and the Chinese State Forestry Administration project (201104058). It should be noted that Mr. M. Bian contributed equal work as the first author to the article. We would like to express our gratitude for the technical help given by Professor J. Lv, H. Ren, X. Luo and Mrs. M. Xu at the Research Institute of Wood Industry, the Chinese Academy of Forestry. We gratefully acknowledge Dr. L. Donaldson of Scion, New Zealand, Dr. L. Salmen of lnnventia AB and Ms. E. Bergstrom from the KTH Royal Institute of Technology. Sweden, for their invaluable comments on the report.

语种：英文

外文关键词：Conninghamia lanceolata; MFA; mechanical properties; basic density

摘要：Radial variations in microfibril angle (MFA) and their effect on the mechanical properties of plantation-grown Chinese fir (Conninghamia lanceolata (Lamb.) Hook.) were investigated with the aim of achieving an effective utilization of the wood. Correlations between MFA and mechanical properties, including longitudinal modulus of elasticity (MOE(L)), static bending strength (MOR) and compression strength parallel-to-the-grain (CS), were analyzed for predicting the quality of timber. The results indicated that MFA had a greater variation in juvenile wood than in mature wood. The biggest change occurred close to the pith in Chinese fir. The outer-rings (rings 9-30 from the pith) have a relatively low MFA, together with high mechanical properties and high density, when compared with the inner-rings (rings 1-8 from the pith). The MFA had significant negative curvilinear correlations with all the mechanical properties (MOE(L), MOR and CS) of Chinese fir, with the value of r(2) being 0.88,0.69 and 0.74 respectively. The correlation between the MFA and basic density (BD) was strong in certain consecutive rings (rings 5-30 from the pith), but this did not apply across the whole billet, i.e. from the pith to the bark.