期刊
HOLZFORSCHUNG
卷 59, 期 2, 页码 214-218出版社
WALTER DE GRUYTER & CO
DOI: 10.1515/HF.2005.034
关键词
air-dry density; microfibril angle; near-infrared spectroscopy; Pinus taeda; SilviScan; stiffness; tracheid morphological characteristics
When a radial strip is cut from an increment core it can potentially be cut with two orientations: parallel to longitudinal tracheids, i.e., a radial-longitudinal (RL) strip (the orientation of SilviScan samples), or at an orientation of 90degrees to the tracheids, i.e., a radial-transverse (RI) strip. Both strips could be used for near-infrared (NIR) analysis, but it is unknown how calibrations based on RT-face NIR spectra compare with those based on RL-face NIR spectra. A total of 20 Pinus taeda L. (loblolly pine) RL strips were characterized in terms of air-dry density, microfibril angle (MFA), stiffness and several tracheid morphological characteristics. NIR spectra were collected in 10-mm increments from the RL and FIT faces of matching strips and used to develop calibrations for each property. In general, RL-face NIR spectra gave calibrations that provided stronger relationships. Differences between the two sets of calibrations were small, indicating that either face could be used for NIR analysis.
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