Estimation of the physical wood properties of green Pinus taeda radial samples by near infrared spectroscopy

The application of near infrared (NIR) spectroscopy to the green wood of radial samples (simulated increment cores) and the development of calibrations for the prediction of wood properties are described. Twenty Pinus taeda L. (loblolly pine) radial strips were characterized in terms of air-dry density, microfibril angle (MFA), and stiffness. NIR spectra were obtained in 10-mm steps from the radial longitudinal and transverse faces of each sample and used to develop calibrations for each property. NIR spectra were collected when the wood was green (moisture content ranged from approximately 100% to 154%) and dried to approximately 7% moisture content. Relationships between measured and NIR estimates for green wood were good; coefficients of determination (R2) ranged from 0.79 (MFA) to 0.85 (air-dry density). Differences between calibrations developed using the radial longitudinal and transverse faces were small. Calibrations were tested on an independent set. Predictive errors were relatively large for so...

[1]  H. Harpster,et al.  Potential of Near Infrared Reflectance Spectroscopy for Analysis of Silage Composition , 1988 .

[2]  J. Bowyer,et al.  Forest Products and Wood Science , 2019 .

[3]  Robert Evans,et al.  ESTIMATION OF WOOD STIFFNESS OF INCREMENT CORES BY NEAR INFRARED SPECTROSCOPY: THE DEVELOPMENT AND APPLICATION OF CALIBRATIONS BASED ON SELECTED CORES , 2002 .

[4]  Robert Evans,et al.  ESTIMATION OF MICROFIBRIL ANGLE OF INCREMENT CORES BY NEAR INFRARED SPECTROSCOPY , 2002 .

[5]  Lisbeth G. Thygesen,et al.  Determination of Dry Matter Content and Basic Density of Norway Spruce by near Infrared Reflectance and Transmittance Spectroscopy , 1994 .

[6]  H. L. Allen,et al.  Short- and long-term effects of site preparation, fertilization and vegetation control on growth and stand development of planted loblolly pine , 2003 .

[7]  Robert Evans,et al.  Estimation of Eucalyptus delegatensis wood properties by near infrared spectroscopy , 2001 .

[8]  Tom Fearn,et al.  Practical Nir Spectroscopy With Applications in Food and Beverage Analysis , 1993 .

[9]  J. Shenk,et al.  Application of NIR Spectroscopy to Agricultural Products , 1992 .

[10]  Jerome J. Workman,et al.  Application of NIR spectroscopy to agricultural products. In 'Handbook of Near-infrared Analysis'.(E , 1992 .

[11]  Anto Rimbawanto,et al.  Near infrared spectroscopy for cost effective screening of foliar oil characteristics in a Melaleuca cajuputi breeding population. , 2003, Journal of agricultural and food chemistry.

[12]  Robert Evans,et al.  Rapid Measurement of the Transverse Dimensions of Tracheids in Radial Wood Sections from Pinus radiata , 1994 .

[13]  John S. Shenk,et al.  Population Definition, Sample Selection, and Calibration Procedures for Near Infrared Reflectance Spectroscopy , 1991 .

[14]  P. Williams,et al.  Comparison of Commercial near Infrared Transmittance and Reflectance Instruments for Analysis of Whole Grains and Seeds , 1993 .

[15]  Robert Evans,et al.  Estimation of air-dry density of increment cores by near infrared spectroscopy , 2003 .