caa a22 4500 378887300 CHVBK 20180305123445.0 cr unu---uuuuu 161128e20040205xx s 000 0 eng 10.1515/HF.2004.009 doi (NATIONALLICENCE)gruyter-10.1515/HF.2004.009 Estimation of Pinus radiata D. Don tracheid morphological characteristics by near infrared spectroscopy [Elektronische Daten] [L. R. Schimleck, R. Evans] Eight Pinus radiata D. Don increment core samples were selected from a total of 32 cores for the development of calibrations for several tracheid morphological characteristics: coarseness, perimeter, radial and tangential diameter and wall thickness. Near infrared (NIR) spectra, obtained from the radial-longitudinal face of each core in 10-mm sections from pith to bark, were used to develop the calibrations. Calibrations for coarseness and wall thickness were excellent, with coefficients of determination (R2) of 0.91 and 0.89, respectively. Calibrations for the remaining characteristics were weaker (R2 ranged from 0.65 to 0.69). To test the predictive ability of the calibrations, two intact P. radiata increment cores (core A and B) were selected from the same set as the calibration samples. NIR-predicted tracheid coarseness and wall thickness were in strong agreement with measured (SilviScan-determined) values. Radial patterns of variation (NIR-predicted, measured) closely followed each other for both cores, but coarseness and wall thickness were underestimated for core B. Tracheid tangential perimeter was well predicted with R2 of 0.69 (core A) and 0.79 (core B). Relationships for the remaining characteristics were weak. Collection of NIR spectra in smaller increments, to capture more of the variation, may improve calibration. Copyright © 2004 by Walter de Gruyter GmbH & Co. KG Timber & wood processing nationallicence Biotechnology nationallicence Materials science nationallicence Schimleck L. R. aut Evans R. aut Holzforschung Walter de Gruyter 58/1(2004-02-05), 66-73 0018-3830 58:1<66 2004 58 hfsg https://doi.org/10.1515/HF.2004.009 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/HF.2004.009 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schimleck L. R. aut NATIONALLICENCE 700 1- Evans R. aut NATIONALLICENCE 773 0- Holzforschung Walter de Gruyter 58/1(2004-02-05), 66-73 0018-3830 58:1<66 2004 58 hfsg CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter