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Forest Products Annual Market Review 2015-2016 / United Nations Economic Commission for Europe (2017)  

Public Titre : Forest Products Annual Market Review 2015-2016 Titre original : Revue annuelle du marché des produits forestiers 2014-2015 Type de document : Rapport Auteurs : United Nations Economic Commission for Europe, Auteur ; Food and agriculture organization, Auteur Editeur : Genève [Suisse] : United Nations Economic Commission for Europe UNECE Année de publication : 2017 Collection : Geneva timber and forest study papers, ISSN 1020-2269 num. 40 Importance : 161 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Economie européenne [Termes descripteurs IGN] bois [Termes descripteurs IGN] bois énergie [Termes descripteurs IGN] économie européenne [Termes descripteurs IGN] forêt [Termes descripteurs IGN] industrie forestière [Termes descripteurs IGN] marché [Termes IFN] bois tropical [Termes IFN] sciage Numéro de notice : 17379 Thématique : FORET Nature : Rapport statistique En ligne : https://www.unece.org/fileadmin/DAM/timber/publications/fpamr2016.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84679

Within-stem maps of wood density and water content for characterization of species: a case study on three hardwood and two softwood species / Fleur Longuetaud in Annals of Forest Science [en ligne], vol 73 n° 3 (September 2016)  

Public [article]  inAnnals of Forest Science [en ligne] > vol 73 n° 3 (September 2016) . - pp 601 - 614 Titre : Within-stem maps of wood density and water content for characterization of species: a case study on three hardwood and two softwood species Type de document : Article/Communication Auteurs : Fleur Longuetaud, Auteur ; Frédéric Mothe, Auteur ; Meriem Fournier, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 601 - 614 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] Abies alba [Termes descripteurs IGN] acer pseudoplatanus [Termes descripteurs IGN] analyse discriminante [Termes descripteurs IGN] caractérisation [Termes descripteurs IGN] espèce végétale [Termes descripteurs IGN] Fagus sylvatica [Termes descripteurs IGN] pseudotsuga menziesii [Termes descripteurs IGN] quercus (genre) [Termes descripteurs IGN] teneur en eau de la végétation [Termes descripteurs IGN] tomographie [Termes descripteurs IGN] tronc [Termes IFN] densité du bois Résumé : (auteur) Key message : Variability and interrelations between wood density, water content, and related properties were analyzed by CT scanning of five species. Relative water content of lumens is proposed as the best complement to basic specific gravity for discrimination of species with respect to their functioning. Context : X-ray computed tomography (CT) is an efficient tool for analysis of wood properties related to density and water content all along a tree stem. Basic specific gravity, an inherent property of the wood material, is well known and widely used in wood sciences. Aims : The first aim of this study was to describe a method for mapping a set of wood properties within a tree stem. The second objective was to analyze the relations among these properties and to identify the one that offers the best information in addition to basic specific gravity for discrimination of species. Methods : Wood discs were collected at various heights along a tree stem. We used a method consisting of comparing the CT images of the discs in the green state and after oven drying. Finally, 10 variables were computed for 115 trees of five temperate species: green, oven-dry, and basic specific gravities; moisture content; relative water content; relative water content of lumens; and fractions of air, water, free water, and cell walls. Results : Maps of wood properties summarizing the radial and vertical variations were obtained, allowing us to highlight species-specific patterns. The five species were discriminated best when plotted in the plane defined by basic specific gravity and relative water content of lumens. Conclusion : The proposed method is original and simple enough to process large samples. Because it correlated less with basic specific gravity than with moisture content, relative water content of lumens was selected for species characterization. This is the first study of such wood properties at this fine scale within a tree stem, simultaneously and for a substantial number of trees of five species including both hardwoods and softwoods. Numéro de notice : A2016-710 Thématique : FORET Nature : Article En ligne : http://dx.doi.org/10.1007/s13595-016-0555-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82088 [article]

Is the variability of key wood properties linked with the variability of key architectural traits? Case of planted Teak in Togo regarding thinning and provenance / Kodjo Tondjo in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  

Public [article]  inAnnals of Forest Science [en ligne] > vol 72 n° 6 (September 2015) . - pp 717 - 729 Titre : Is the variability of key wood properties linked with the variability of key architectural traits? Case of planted Teak in Togo regarding thinning and provenance Type de document : Article/Communication Auteurs : Kodjo Tondjo, Auteur ; Loïc Brancheriau, Auteur ; Sylvie-Annabel Sabatier, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 717 - 729 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] analyse diachronique [Termes descripteurs IGN] Congo [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] image proche infrarouge [Termes descripteurs IGN] Tectona grandis [Termes descripteurs IGN] Togo [Termes IFN] ontogenèse végétale [Termes IFN] propriété du bois Résumé : (auteur) Key message : A retrospective architectural analysis performed on planted teaks in Togo showed that the variation of wood radial properties were linked with tree ontogeny, and that these relationships depended on thinning practices and provenance. Context : Variability in growth, flowering and forking in individual trees according to origin and/or thinning practices may affect wood structure and consequently impact wood physical properties. We tested this hypothesis in teak. Aims : We sought evidence of: (1) origin effects (Togolese versus Tanzanian teak) on growth, flowering, cambial growth and wood properties; (2) thinning effects on these variables and (3) relationships between tree ontogeny and radial variations of wood properties. Methods : A retrospective architectural analysis was used to draw stem growth and near infrared spectroscopy to assess radial variations of wood properties. Results : Flowering reflects tree vigour and began at an earlier age in Togolese than in Tanzanian provenances. No differences were detected in regards to growth ring surface area, basic density and modulus of elasticity. Both systematic and selective thinnings improved growth without impacting the two latter properties. Stabilization of the growth ring area observed at 4 years old was associated with a decline in stem annual extension with a 1-year time lag. Conclusions : Architectural analyses showed that radial growth was linked with tree ontogeny. This method can be extended to subsequent developmental stages, i.e. to older trees with economic interest, and used to determine architectural traits that are useful in tree selection. Numéro de notice : A2015-408 Thématique : FORET Nature : Article En ligne : http://link.springer.com/article/10.1007/s13595-014-0425-x/fulltext.html Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76895 [article]

A novel method to correct for wood MOE ultrasonics and NIRS measurements on increment cores in Liquidambar styraciflua L / Herizo Rakotovololonalimanana in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  

Public [article]  inAnnals of Forest Science [en ligne] > vol 72 n° 6 (September 2015) . - pp 753 - 761 Titre : A novel method to correct for wood MOE ultrasonics and NIRS measurements on increment cores in Liquidambar styraciflua L Type de document : Article/Communication Auteurs : Herizo Rakotovololonalimanana, Auteur ; Gilles Chaix, Auteur ; Loïc Brancheriau, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 753 - 761 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] analyse comparative [Termes descripteurs IGN] élasticité [Termes descripteurs IGN] image proche infrarouge [Termes descripteurs IGN] Liquidambar styraciflua [Termes descripteurs IGN] spectrométrie [Termes descripteurs IGN] télédétection acoustique [Termes descripteurs IGN] ultrason [Termes IFN] propriété du bois Résumé : (auteur) Key message : Ultrasounds overestimate the MOE value. This paper analyses the causes of this difference and opens the perspective for a novel method allowing the calculation of the correct MOE from ultrasounds or NIRS measurements on cores. Context : Standardized methods for determining wood modulus of elasticity (MOE) are destructive and require many replicates. Other methods such as NIRS and ultrasound have been developed to characterize wood properties and overcome these constraints. Aim : The aim of this study was to compare the two MOE measurement methods (NIRS and ultrasound) applied to cores of wood taken from standing trees (Liquidambar styraciflua). Methods : MOE, measured by an acoustic method in standard samples (360 × 20 × 20 mm), was used as a reference. Then MOE was predicted by an NIRS model and determined using ultrasound in standard samples (360 × 20 × 20 mm), small samples (10 × 20 × 20 mm), and cores (15 mm in diameter). Result : MOE values determined by acoustic method on standard samples and by ultrasonic method on small samples were correlated (R 2 = 0.72) and were not statistically different. The NIRS PLS regression yielded a model with R 2 cv = 0.80. The link between NIRS and ultrasound on cores was statistically significant (R 2 = 0.68). Conclusion : The ultrasonic technique determines an apparent modulus enables comparative data analysis. This apparent modulus can be used for quantitative analysis if a corrective model is used. A correction formula to ultrasonic MOE was proposed in the case of a prismatic geometry. Numéro de notice : A2015-409 Thématique : FORET/IMAGERIE Nature : Article En ligne : http://link.springer.com/article/10.1007/s13595-015-0469-6/fulltext.html Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76896 [article]

vol 72 n° 6 - September 2015 - Wood properties: future needs, measurement and modelling (Bulletin de Annals of Forest Science [en ligne]) / Francis Colin  

Public [n° ou bulletin]  est un bulletin de Annals of Forest Science [en ligne] / Institut national de la recherche agronomique (2011 - )   Titre : vol 72 n° 6 - September 2015 - Wood properties: future needs, measurement and modelling Type de document : Périodique Auteurs : Francis Colin, Editeur scientifique ; Marie-Pierre Laborie, Editeur scientifique ; Mathieu Fortin, Editeur scientifique Année de publication : 2015 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] biomasse forestière [Termes descripteurs IGN] développement durable [Termes IFN] biologie moléculaire végétale [Termes IFN] bois [Termes IFN] bois d'industrie Numéro de notice : sans Thématique : FORET Nature : Numéro de périodique En ligne : http://link.springer.com/journal/13595/72/6/page/1 Format de la ressource électronique : URL Sommaire Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=25371 [n° ou bulletin]

Contient

• Is the variability of key wood properties linked with the variability of key architectural traits? Case of planted Teak in Togo regarding thinning and provenance / Kodjo Tondjo in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  
• A novel method to correct for wood MOE ultrasonics and NIRS measurements on increment cores in Liquidambar styraciflua L / Herizo Rakotovololonalimanana in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  
• Recommendations for the use of tree models to estimate national forest biomass and assess their uncertainty / Matieu Henry in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  
• An overview of existing and promising technologies for national forest monitoring / Matieu Henry in Annals of Forest Science [en ligne], vol 72 n° 6 (September 2015)  

Pas de vent, pas de bois. L’apport de la biomécanique des arbres pour comprendre la croissance puis la vulnérabilité aux vents forts des peuplements forestiers / Meriem Fournier in Revue forestière française [en ligne], vol 67 n° 3 (mai 2015)

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Approvisionnement : Mobilisation, revenir à plus de réalisme ! / Fabienne Tisserand in Le Bois International : l'officiel du bois [édition verte], vol 2015 n° 15 (18 avril 2015)

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Forest Products Annual Market Review 2014-2015 / United Nations Economic Commission for Europe (2015)  

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The potential, requirements, and limitations of BIM for Offsite timber construction / Panagiotis Patlakas in International journal of 3-D information modeling, vol 4 n° 1 (January - March 2015)

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Chalets et maisons bois Poirot investit l'amont du métier / Maurice Chalayer in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 24 (26 juin 2010)

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Cours des bois sur pied : mai-juin 2010 / Michel Chavet ; Pierre Chavet in La Forêt Privée, n° 313 (mai-juin 2010)

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Industries du bois d'Aquitaine / Pierrette Castagné in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 20 (29 mai 2010)

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Sciages feuillus in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 20 (29 mai 2010)

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Sciages résineux in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 20 (29 mai 2010)

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Cahier spécial Carrefour international du bois 2010 in Le Bois International : l'officiel du bois [édition verte], vol 2010 n° 19 (15 et 22 mai 2010)  

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