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Development of near infrared reflectance analysis calibrations for estimating genetic parameters for cellulose content in Eucalyptus globulus

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Determining kraft pulp yield in the traditional way is slow and expensive, limiting the numbers of samples that may be processed. An alternative is to use a secondary standard, such as cellulose content of the wood, which is strongly correlated with kraft pulp yield. The feasibility and efficiency of predicting cellulose content using near infrared reflectance (NIR) analysis was examined for Eucalyptus globulus Labill. Calibrations for NIR prediction of cellulose content indicated that NIR analysis could be used as a reliable predictor. Standard errors of calibration were 1% or lower, and there was excellent agreement between laboratory and predicted cellulose values. Cellulose content was under moderate genetic control (h2 ranging from 0.32 to 0.57), and genetic correlations with tree diameter and basic density were variable (ranging from –0.11 to –0.51 and –0.33 to 0.67, respectively). The advantages, disadvantages, and potential applications of NIR analysis for predicting cellulose content are examined.

La méthode traditionnelle utilisée pour déterminer le rendement en pâte kraft est lente et coûteuse, ce qui limite le nombre d'échantillons qu'il est possible d'analyser. Une alternative consiste à utiliser un standard secondaire tel que le contenu en cellulose qui est fortement corrélé au rendement en pâte kraft. La faisabilité et l'efficacité de l'analyse de la réflectance dans le proche infrarouge pour prédire le contenu en cellulose ont été étudiées pour Eucalyptus globulus Labill. La courbe d'étalonnage construite pour prédire le contenu en cellulose au moyen de la réflectance dans le proche infrarouge montre que cette méthode est fiable. L'erreur standard de calibration ne dépasse pas 1% et la concordance entre les valeurs obtenues en laboratoire et les valeurs prédites pour le contenu en cellulose est excellente. Le contenu en cellulose est sous contrôle génétique modéré (h2 variant de 0,32 à 0,57) et les corrélations génétiques avec le diamètre de l'arbre et la densité sont variables, allant respectivement de –0,11 à –0,51 et de –0,33 à 0,67. Les avantages, les désavantages et les applications potentielles de l'analyse de la réflectance dans le proche infrarouge pour prédire le contenu en cellulose sont discutés.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: January 1, 2002

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  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
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