tailieunhanh - Báo cáo lâm nghiệp: "Assessment of tension wood detection based on shiny appearance for three poplar cultivars Miguel Angel BADIA, Frédéric MOTHE, Thiéry "

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: "Assessment of tension wood detection based on shiny appearance for three poplar cultivars Miguel Angel BADIA, Frédéric MOTHE, Thiéry " | Ann. For. Sci. 62 2005 43-49 INRA EDP Sciences 2005 DOI forest 2004093 43 Original article Assessment of tension wood detection based on shiny appearance for three poplar cultivars Miguel Angel Badia Frédéric Mothe Thiéry Constant Gérard Nepveu LERFOB UMR INRA-ENGREF No. 1092 Wood Quality Research Team INRA Research Centre of Nancy 54280 Champenoux France Received 5 November 2003 accepted 31 August 2004 Abstract - The shiny appearance of poplar tension wood was tested in order to detect and to quantify the amount of tension wood in nine crosscut discs. These carefully sawn discs came from different poplar clones I214 Melone Carlo I-MC and Luisa Avanzo exhibiting different patterns of tension wood distribution. The relevancy of the results was verified by means of 80 thin sections 15 pm thick and double stained with safranine and astra blue. Digital images of the discs and microscopic cuts were processed by image analysis to quantify the comparison. There was good agreement between both methods despite very different scales of observation. Eighty percent of the tension wood spots were detected by both methods and differences were mainly explained by human factors or inaccuracies in the macroscopic detection of small areas. tension wood poplar macroscopic detection microscopic measurement image analysis wood anatomy Résumé - Evaluation de la detection du bois de tension basée sur son aspect nacré pour trois variétés de peuplier. L apparence nacrée du bois de tension de peuplier est testée pour détecter et quantifier la quantité de bois de tension dans neuf rondelles. Ces rondelles sciées avec précaution proviennent de plusieurs clones de peuplier 1214 Melone-Carlo I-MC et Luisa Avanzo présentant des motifs différents de distribution du bois de tension. La pertinence du résultat est vérifiée sur 80 coupes microscopiques au moyen d un double coloration safranine bleu astra. Des images numériques des rondelles et des coupes microscopiques ont été traitées par .