{"id":88128,"date":"2024-06-07T22:45:49","date_gmt":"2024-06-07T15:45:49","guid":{"rendered":"https:\/\/www.forestsnews.org\/?p=88128"},"modified":"2024-06-07T22:45:49","modified_gmt":"2024-06-07T15:45:49","slug":"quest-ce-qui-fait-un-bon-bois","status":"publish","type":"post","link":"https:\/\/www.forestsnews.org\/fr\/88128\/quest-ce-qui-fait-un-bon-bois","title":{"rendered":"Qu&rsquo;est-ce qui fait un bon bois ?"},"content":{"rendered":"<p>Le bassin du Congo, qui s&rsquo;\u00e9tend sur plusieurs pays d&rsquo;Afrique centrale, abrite la deuxi\u00e8me plus grande for\u00eat tropicale du monde. Couvrant plus de 2 millions de kilom\u00e8tres carr\u00e9s, cette vaste for\u00eat est un atout important pour la plan\u00e8te et ses habitants &#8211; et particuli\u00e8rement pour les pays qui en d\u00e9pendent directement.<\/p>\n<p>La R\u00e9publique D\u00e9mocratique du Congo (RDC), la R\u00e9publique du Congo (RoC), le Gabon, le Cameroun et la R\u00e9publique Centrafricaine (RCA) ont des liens \u00e9conomiques significatifs avec ces for\u00eats &#8211; notamment \u00e0 travers le secteur du bois. En 2022, la production de bois dans la r\u00e9gion a atteint 20 millions de m\u00e8tres cubes : c\u2019est une pierre angulaire de leurs \u00e9conomies respectives, fournissant des revenus substantiels et des opportunit\u00e9s d&#8217;emploi pour des millions de personnes.<\/p>\n<p>La RoC, par exemple, tire 5,6 % de son PIB du bois, ce qui en fait le deuxi\u00e8me employeur apr\u00e8s l&rsquo;\u00c9tat. Cependant, le d\u00e9veloppement durable de ce secteur n\u00e9cessite une compr\u00e9hension approfondie de la r\u00e9partition et de la qualit\u00e9 de la ressource : les caract\u00e9ristiques du bois jouent un r\u00f4le crucial dans la d\u00e9termination de ses usages et de sa valeur commerciale.<\/p>\n<p>Gr\u00e2ce au programme \u00ab Recherche appliqu\u00e9e en \u00e9cologie et sciences sociales au service de la gestion durable des \u00e9cosyst\u00e8mes forestiers en Afrique centrale \u00bb (<a href=\"https:\/\/www.cifor-icraf.org\/ressac\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">RESSAC<\/a>), financ\u00e9 par l&rsquo;UE, le Centre de recherche foresti\u00e8re internationale et le Centre Internationald de Recherche en agroforesterie (CIFOR-ICRAF) soutient un consortium pour explorer et mieux comprendre les d\u00e9terminants \u00e9cologiques et g\u00e9n\u00e9tiques de la qualit\u00e9 du bois dans diverses esp\u00e8ces foresti\u00e8res actuellement exploit\u00e9es pour le bois en RoC.<\/p>\n<p>Le consortium comprend des chercheurs de <a href=\"https:\/\/www.casafrica.es\/pt\/network\/universite-marien-ngouabi\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">l&rsquo;Universit\u00e9 Marien Ngouabi<\/a> de RoC, du Centre de coop\u00e9ration internationale en recherche agronomique pour le d\u00e9veloppement (<a href=\"https:\/\/www.cirad.fr\/en\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">CIRAD<\/a>), de <a href=\"https:\/\/www.vub.be\/en\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">l&rsquo;Universit\u00e9 libre de Bruxelles<\/a> et de l&rsquo;entreprise industrielle locale de bois Congolaise Industrielle des Bois (CIB), une filiale du leader agro-industriel <a href=\"https:\/\/www.olamagri.com\/products-services\/wood-products.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Olam Agri<\/a>.<\/p>\n<p>Ils \u00e9tudient comment les conditions environnementales, la diversit\u00e9 g\u00e9n\u00e9tique et d&rsquo;autres facteurs influencent la qualit\u00e9 du bois de diverses esp\u00e8ces d&rsquo;arbres dans les for\u00eats indig\u00e8nes de la RoC. \u00ab Avec ce projet, nous visons \u00e0 d\u00e9terminer la qualit\u00e9 du bois, ce qui est vital pour la CIB et, par extension, pour l&rsquo;\u00e9conomie du pays \u00bb, a d\u00e9clar\u00e9 Richard Sufo, chercheur au CIFOR-ICRAF.<\/p>\n<p>\u00ab Nous croyons que la recherche joue un r\u00f4le essentiel  dans la gestion durable des for\u00eats d&rsquo;Afrique centrale \u00bb, a d\u00e9clar\u00e9 Vincent Istace, directeur de la durabilit\u00e9 chez Olam Agri. \u00ab Elle nous permet de mieux comprendre les \u00e9cosyst\u00e8mes forestiers et d&rsquo;\u00e9valuer les impacts du changement climatique, pour n&rsquo;en nommer que quelques-uns de ses avantages. Pour Olam Agri, elle nous aide \u00e0 d\u00e9velopper des techniques de r\u00e9colte plus durables en collaboration avec les meilleurs sp\u00e9cialistes, et c&rsquo;est la principale raison pour laquelle nous nous y engageons. \u00bb<\/p>\n<p>Les activit\u00e9s du projet ont officiellement d\u00e9marr\u00e9 en ao\u00fbt 2023, avec un premier focus sur la r\u00e9colte annuelle de la CIB \u00e0 Kabo, un district situ\u00e9 \u00e0 l&rsquo;extr\u00eame nord du pays. \u00ab L&rsquo;objectif principal \u00e9tait d&rsquo;identifier les esp\u00e8ces d&rsquo;arbres pr\u00e9sentes dans la zone \u00bb, a d\u00e9clar\u00e9 Tientcheu Yogom Boniface, post-doctorant impliqu\u00e9 dans le projet et bas\u00e9 \u00e0 l&rsquo;Universit\u00e9 Marien Ngouabi. \u00ab Un total de 138 esp\u00e8ces d&rsquo;arbres ont \u00e9t\u00e9 identifi\u00e9es et 47 \u00e9chantillons de bois ont \u00e9t\u00e9 collect\u00e9s pour des recherches ult\u00e9rieures. \u00bb<\/p>\n<p>Actuellement, la recherche se concentre sur trois sites principaux dans le nord du Congo &#8211; Kabo, Loundoungou et Mimbeli &#8211; et sur quatre esp\u00e8ces de bois importantes : Frak\u00e9 [<em>Terminalia superba<\/em>], Ayous [<em>Triplochiton scleroxylon<\/em>], Sapelli [<em>Entandrophragma cylindricum<\/em>] et Padouk [<em>Pterocarpus soyauxii<\/em>]. Les chercheurs ont trouv\u00e9 des variations consid\u00e9rables dans la qualit\u00e9 du bois de ces esp\u00e8ces, qui peuvent \u00eatre attribuables \u00e0 des facteurs tels que les caract\u00e9ristiques du sol ou les qualit\u00e9s intrins\u00e8ques.<\/p>\n<figure id=\"attachment_88131\" aria-describedby=\"caption-attachment-88131\" style=\"width: 800px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-88131\" src=\"https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research.webp\" alt=\"\" width=\"800\" height=\"290\" srcset=\"https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research.webp 800w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research-566x205.webp 566w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research-768x278.webp 768w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research-220x80.webp 220w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research-610x221.webp 610w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-research-672x244.webp 672w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-88131\" class=\"wp-caption-text\">Les membres de l&rsquo;\u00e9quipe de recherche effectuent des analyses avant la r\u00e9colte des arbres. Photos par Laurenne Mefan\/CIFOR-ICRAF<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>La deuxi\u00e8me phase de la recherche est r\u00e9alis\u00e9e en collaboration avec l&rsquo;\u00e9quipe de r\u00e9colte : \u00e0 mesure que chaque arbre est r\u00e9colt\u00e9, les scientifiques suivent de pr\u00e8s le processus et une partie de l&rsquo;arbre abattu est ensuite r\u00e9cup\u00e9r\u00e9e et transport\u00e9e au CIRAD \u00e0 Montpellier, en France.<\/p>\n<p>\u00ab Au CIRAD, des analyses anatomiques et de qualit\u00e9 ainsi que des analyses de spectroscopie infrarouge sont effectu\u00e9es sur les \u00e9chantillons de bois \u00bb, a d\u00e9clar\u00e9 Boniface. \u00ab Ces analyses nous permettent d&rsquo;identifier diverses qualit\u00e9s de bois, y compris la densit\u00e9, la r\u00e9sistance et d&rsquo;autres caract\u00e9ristiques pertinentes que nous visons \u00e0 pr\u00e9server. \u00bb<\/p>\n<figure id=\"attachment_88132\" aria-describedby=\"caption-attachment-88132\" style=\"width: 800px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-88132\" src=\"https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy.webp\" alt=\"\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy.webp 800w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-533x400.webp 533w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-553x415.webp 553w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-768x576.webp 768w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-220x165.webp 220w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-610x458.webp 610w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-400x300.webp 400w, https:\/\/www.forestsnews.org\/wp-content\/uploads\/2024\/06\/Boni-2-copy-595x446.webp 595w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-88132\" class=\"wp-caption-text\">Les membres de l&rsquo;\u00e9quipe examinent une souche d&rsquo;arbre dans la zone foresti\u00e8re. Photo par Laureanne Mefan\/CIFOR-ICRAF<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Des \u00e9chantillons de feuilles et de cambium sont \u00e9galement recueillis et transport\u00e9s \u00e0 l&rsquo;Universit\u00e9 libre de Bruxelles pour une analyse g\u00e9n\u00e9tique. Les donn\u00e9es morphom\u00e9triques, \u00e9cologiques et g\u00e9n\u00e9tiques recueillies sont ensuite combin\u00e9es et analys\u00e9es pour d\u00e9couvrir les origines de la qualit\u00e9 du bois.<\/p>\n<p>Le processus comprend parfois l&rsquo;identification des cas o\u00f9 plusieurs esp\u00e8ces sont regroup\u00e9es sous un m\u00eame nom d&rsquo;esp\u00e8ce foresti\u00e8re, ce qui peut masquer les variations des propri\u00e9t\u00e9s physicochimiques et de la qualit\u00e9 du bois. Une telle repr\u00e9sentation erron\u00e9e peut induire en erreur les utilisateurs finaux et souligne l&rsquo;importance de cette recherche.<\/p>\n<p>Le projet contribue \u00e9galement \u00e0 la formation des \u00e9tudiants en master et des jeunes chercheurs au sein de la communaut\u00e9 de recherche. Plus important encore, il b\u00e9n\u00e9ficie \u00e0 la CIB en am\u00e9liorant sa compr\u00e9hension des propri\u00e9t\u00e9s du bois et son positionnement sur le march\u00e9. En fin de compte, les connaissances acquises permettront une meilleure utilisation du bois provenant des for\u00eats du Congo au b\u00e9n\u00e9fice \u00e0 long terme de ses habitants et de ses \u00e9cosyst\u00e8mes.<\/p>\n<hr \/>\n<p><strong>Remerciements<\/strong><\/p>\n<p>Cette recherche est parrain\u00e9e par le programme RESSAC (Recherche appliqu\u00e9e en \u00e9cologie et sciences sociales au service de la gestion durable des \u00e9cosyst\u00e8mes forestiers en Afrique centrale). Financ\u00e9 par l&rsquo;Union europ\u00e9enne, ce programme vise \u00e0 concentrer les travaux de recherche sur les \u00ab solutions op\u00e9rationnelles \u00bb qui doivent \u00eatre invent\u00e9es et mises en \u0153uvre par les acteurs locaux confront\u00e9s aux d\u00e9fis concrets de la gestion durable des ressources naturelles dans le cadre de leurs mandats ou de leurs activit\u00e9s socio-\u00e9conomiques quotidiennes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le bassin du Congo, qui s&rsquo;\u00e9tend sur plusieurs pays d&rsquo;Afrique centrale, abrite la deuxi\u00e8me plus grande for\u00eat tropicale du monde. Couvrant plus de 2 millions de kilom\u00e8tres carr\u00e9s, cette vaste for\u00eat est un atout important pour la plan\u00e8te et ses habitants &#8211; et particuli\u00e8rement pour les pays qui en d\u00e9pendent directement. La R\u00e9publique D\u00e9mocratique du [&hellip;]<\/p>\n","protected":false},"author":318,"featured_media":88129,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[6090],"tags":[11684],"language":[2170],"location":[12220,12258,12320,12275],"tag-bahasa":[],"tag-espanol":[],"tag-francais":[],"type-espanol":[],"type-bahasa":[],"type-english":[],"type-francais":[],"coauthors":[9392],"class_list":["post-88128","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-forests-news","tag-gestion-durable-du-bois","language-francais","location-congo-basin","location-democratic-republic-of-congo","location-europe","location-republic-of-congo"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Qu&#039;est-ce qui fait un bon bois ? - Landscape Alliance Forests News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.forestsnews.org\/fr\/88128\/quest-ce-qui-fait-un-bon-bois\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu&#039;est-ce qui fait un bon bois ?\" \/>\n<meta property=\"og:description\" content=\"Le bassin du Congo, qui s&rsquo;\u00e9tend sur plusieurs pays d&rsquo;Afrique centrale, abrite la deuxi\u00e8me plus grande for\u00eat tropicale du monde. 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