{"id":44320,"date":"2024-10-23T16:42:37","date_gmt":"2024-10-23T14:42:37","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44320"},"modified":"2024-10-23T16:42:37","modified_gmt":"2024-10-23T14:42:37","slug":"les-courbes-de-productivite-du-douglas-de-lepicea-et-des-melezes-revisitees","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/les-courbes-de-productivite-du-douglas-de-lepicea-et-des-melezes-revisitees\/","title":{"rendered":"Les courbes de productivit\u00e9 du douglas, de l\u2019\u00e9pic\u00e9a et des m\u00e9l\u00e8zes revisit\u00e9es"},"content":{"rendered":"<p>Les r\u00e9sineux repr\u00e9sentent une grande part des surfaces foresti\u00e8res productives en Wallonie. Plus particuli\u00e8rement, l\u2019\u00e9pic\u00e9a est encore \u00e0 l\u2019heure actuelle la premi\u00e8re essence de production en volume alors que les peuplements de m\u00e9l\u00e8zes et de douglas sont de plus en plus pr\u00e9sents. Il est d\u00e8s lors apparu n\u00e9cessaire de revoir les courbes de productivit\u00e9 de ces essences afin de pouvoir estimer leur production rapidement et \u00e0 moindre co\u00fbt. Ces nouvelles courbes montrent que les m\u00e9l\u00e8zes ont une croissance en hauteur dominante tr\u00e8s pr\u00e9coce, mais elle ne se maintient pas au-del\u00e0 de 20 ans. Les douglas et \u00e9pic\u00e9as ont une croissance plus soutenue et comblent leur retard par rapport aux m\u00e9l\u00e8zes respectivement vers 25 et 55 ans. Il semble \u00e9galement que la productivit\u00e9 des peuplements de m\u00e9l\u00e8ze soit relativement similaire. Ce constat vient probablement de l\u2019attention port\u00e9e \u00e0 l\u2019ad\u00e9quation essence-station et \u00e0 la bonne reprise des plantations. Pour le douglas et l\u2019\u00e9pic\u00e9a, les indices de productivit\u00e9 sont plus dispers\u00e9s. Probablement en raison de la variabilit\u00e9 g\u00e9n\u00e9tique pour le douglas et de la large gamme de stations dans lesquelles l\u2019\u00e9pic\u00e9a a \u00e9t\u00e9 plant\u00e9. De nouvelles classes de productivit\u00e9 ont \u00e9t\u00e9 d\u00e9finies. L\u2019indice de productivit\u00e9 moyen se trouve dans la deuxi\u00e8me classe qui est centr\u00e9e \u00e0 27 m\u00e8tres \u00e0 50 ans pour l\u2019\u00e9pic\u00e9a et les m\u00e9l\u00e8zes et \u00e0 36 m\u00e8tres pour le douglas, toujours \u00e0 50 ans. Pour les gestionnaires souhaitant conna\u00eetre la classe de productivit\u00e9 de leurs peuplements, un outil a \u00e9t\u00e9 mis en ligne sur le site de l\u2019unit\u00e9 de Gestion des For\u00eats et des Milieux Naturels de Gembloux Agro-Bio Tech afin de l\u2019estimer et de pouvoir se situer par rapport au niveau de production attendu. [S.P.]<\/p>","protected":false},"excerpt":{"rendered":"<p>Les r\u00e9sineux repr\u00e9sentent une grande part des surfaces foresti\u00e8res productives en Wallonie. Plus particuli\u00e8rement, l\u2019\u00e9pic\u00e9a est encore \u00e0 l\u2019heure actuelle la premi\u00e8re essence de production en volume alors que les peuplements de m\u00e9l\u00e8zes et de douglas sont de plus en plus pr\u00e9sents. Il est d\u00e8s lors apparu n\u00e9cessaire de revoir les courbes de productivit\u00e9 de [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les courbes de productivit\u00e9 du douglas, de l\u2019\u00e9pic\u00e9a et des m\u00e9l\u00e8zes revisit\u00e9es - For\u00eat.Nature<\/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:\/\/foretnature.be\/en\/article-foret-nature\/les-courbes-de-productivite-du-douglas-de-lepicea-et-des-melezes-revisitees\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les courbes de productivit\u00e9 du douglas, de l\u2019\u00e9pic\u00e9a et des m\u00e9l\u00e8zes revisit\u00e9es - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Les r\u00e9sineux repr\u00e9sentent une grande part des surfaces foresti\u00e8res productives en Wallonie. 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