TAILIEUCHUNG - Báo cáo lâm nghiệp: " Decay resistance in Dicorynia guianensis Amsh.: analysis of inter-tree and intra-tree variability and relations with wood colour"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Decay resistance in Dicorynia guianensis Amsh.: analysis of inter-tree and intra-tree variability and relations with wood colour. | Ann. For. Sci. 61 2004 373-380 INRA EDP Sciences 2004 DOI forest 2004030 373 Original article Decay resistance in Dicorynia guianensis Amsh. analysis of inter-tree and intra-tree variability and relations with wood colour Nadine AMUSANTa Jacques BEAUCHENEb Mériem FOURNIERc Gérard jANINd Marie-France THEVENONa a CIRAD Forêt Forest Products Programme 73 rue JF Breton 34398 Montpellier Cedex 5 France b CIRAD Forêt Forest Products Programme BP 701 97310 French Guiana France c UMR Écologie des forêts de Guyane CIRAD-ENGREF-INRA BP 709 97310 French Guiana France d Universidade de Brasilia Departamento de Enensharia Florestral Brasilia . Brazil Received 22 November 2003 accepted 9 February 2004 Abstract - Dicorynia guianensis Amsh. is very widespread in the forests of French Guiana and moreover is the leading species harvested in this area but its main defect remains the great variability of wood durability especially with respect to fungal decay. The aim of this work was to study this inter- and intra-tree variability in order to identify the parameters responsible for this variation growth area height and radial position within the tree. The resistance decrease from the outer heartwood to the pith. Measurement of colour variation using the CIELAB L a b C h system was performed at the intra-tree level to highlight the longitudinal and radial gradients of variation. Dicorynia guianensis becomes less red and dark from the outer to the inner heartwood and from the base to the top. Lastly variations of colour and durability were correlated the wood is less resistant the redder and darker it is. Dicorynia guianensis Amazonian wood wood colour decay resistance heartwood variability Résumé - Variabilité de la durabilité inter-arbre et intra-arbre de Dicorynia guianensis - et relation avec la couleur. Dicorynia Guianensis Amsh. est une essence très répandue dans les forêts de Guyane franfaise. C est l une des essences les plus exploitées cependant elle souffre d un .

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