Calibraçoes NIRS para três propriedades quimicas da madeira de Eucalyptus urophylla
The purpose of this study was to obtain calibration through Near Infrared Spectroscopy Technique (NIRS) for the following properties: total extractive content, total lignin, and wood holocelulose from a natural hybrid of Eucalyptus urophylla owned by V & M Florestal, located in Paraopeba city - MG. The hybrid was seven years old and was planted in 3 x 3m spacing. The sampling was done in a single tree and the specimens were taken throughout the trunk. The calibrations were derived from the milled wood. A spectrometer (Bruker model MPA-R) was used. The spectra were acquired in the range from 750 to 12500 nm in diffuse reflection mode. The models were fitted by PLS-1 method. The cross-validation method was used. The first and second derivative pre-treatment were used. From the results, it was concluded that: a) the highest correlation was obtained for the total lignin content, with value of correlation r = 0.62 and RPD = 1.3; b) the holocellulose content showed r = 0.50 and RPD of 1.8; c) the extractives content showed r = 0.35 and RPD of 1.0; d) the first derived pre-treatment was, for total lignin content and for holocellulose, the one that provided the best calibrations.
| Main Authors: | , , , , |
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| Format: | article biblioteca |
| Language: | por |
| Subjects: | K50 - Technologie des produits forestiers, U30 - Méthodes de recherche, F60 - Physiologie et biochimie végétale, Eucalyptus urophylla, bois, propriété physicochimique, spectroscopie infrarouge, composition chimique, lignine, cellulose, qualité, http://aims.fao.org/aos/agrovoc/c_26492, http://aims.fao.org/aos/agrovoc/c_8421, http://aims.fao.org/aos/agrovoc/c_1521, http://aims.fao.org/aos/agrovoc/c_28568, http://aims.fao.org/aos/agrovoc/c_1794, http://aims.fao.org/aos/agrovoc/c_4329, http://aims.fao.org/aos/agrovoc/c_1423, http://aims.fao.org/aos/agrovoc/c_6400, http://aims.fao.org/aos/agrovoc/c_1070, |
| Online Access: | http://agritrop.cirad.fr/557453/ http://agritrop.cirad.fr/557453/1/Artigo%2002.pdf |
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| Summary: | The purpose of this study was to obtain calibration through Near Infrared Spectroscopy Technique (NIRS) for the following properties: total extractive content, total lignin, and wood holocelulose from a natural hybrid of Eucalyptus urophylla owned by V & M Florestal, located in Paraopeba city - MG. The hybrid was seven years old and was planted in 3 x 3m spacing. The sampling was done in a single tree and the specimens were taken throughout the trunk. The calibrations were derived from the milled wood. A spectrometer (Bruker model MPA-R) was used. The spectra were acquired in the range from 750 to 12500 nm in diffuse reflection mode. The models were fitted by PLS-1 method. The cross-validation method was used. The first and second derivative pre-treatment were used. From the results, it was concluded that: a) the highest correlation was obtained for the total lignin content, with value of correlation r = 0.62 and RPD = 1.3; b) the holocellulose content showed r = 0.50 and RPD of 1.8; c) the extractives content showed r = 0.35 and RPD of 1.0; d) the first derived pre-treatment was, for total lignin content and for holocellulose, the one that provided the best calibrations. |
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