We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Estimation of total extractive content of wood from planted and native forests by near infrared spectroscopy.
- Authors
Teixeira Mancini, Luana; Guedes Ramalho, Fernanda Maria; Fernando Trugilho, Paulo; Gherardi Hein, Paulo Ricardo
- Abstract
The aim of this study was to evaluate the performance of multivariate models using Near infrared (NIR) spectra for predicting total extractives content of solid and powdered wood of planted and native species from tropical savanna. NIR spectra were recorded on the milled wood and radial surface of solid wood specimens of Cedrela sp., Jacaranda sp., Apuleia sp., Aspidosperma sp. and clones of Eucalyptus hybrids via an integrating sphere and fiber optics probe. NIR spectral signatures were evaluated by Principal Component Analysis (PCA) and then associated to the total extractive content quantified by extraction in toluene/ethanol (2:1) solutions, pure ethanol and hot water by Partial Least Squares (PLS) regressions. PCA revealed that NIR spectra measured in solid wood by integrating sphere gave a better discrimination of wood species. A global PLS model was developed based on NIR obtained by integrating sphere with satisfactory estimations both for solid wood (R²cv= 0.87, RMSECV= 1.08%) and wood powder (R²cv= 0.85, RMSECV= 1.19%). An independent test-set validation was performed with 25% of the samples and yielded R²p= 0.93 and RMSEP= 0.95% (for solid wood) and R²p= 0.87 and RMSEP= 1.40% (for wood powder). Both models can be applied for rapid screenings, though models developed from NIR spectra by integrating sphere on solid wood are considered more suitable for rapid predictions of extractive content in unknown wood specimens.
- Subjects
SAVANNAS; FORESTS &; forestry; ATTENUATED total reflectance; PRINCIPAL components analysis; FIBER optics; NEAR infrared spectroscopy; HOT water
- Publication
iForest - Biogeosciences & Forestry, 2021, Vol 14, Issue 1, p18
- ISSN
1971-7458
- Publication type
Article
- DOI
10.3832/ifor3472-013