{"id":44291,"date":"2024-10-23T16:42:17","date_gmt":"2024-10-23T14:42:17","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44291"},"modified":"2024-10-23T16:42:17","modified_gmt":"2024-10-23T14:42:17","slug":"la-gestion-des-futaies-jardinees-en-foret-noire","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/la-gestion-des-futaies-jardinees-en-foret-noire\/","title":{"rendered":"La gestion des futaies jardin\u00e9es en For\u00eat Noire"},"content":{"rendered":"<p>La futaie jardin\u00e9e est une forme de gestion irr\u00e9guli\u00e8re, dont la courbe de distribution des tiges repr\u00e9sente une hyperbole. Cela signifie que des arbres de toutes dimensions cohabitent dans un m\u00eame peuplement, mais o\u00f9 chacune des classes de diam\u00e8tre poss\u00e8de un nombre constant de tiges. On parle alors de structure irr\u00e9guli\u00e8re \u00e0 l\u2019\u00e9tat d\u2019\u00e9quilibre. Ce traitement est largement appliqu\u00e9 en For\u00eat Noire, en Allemagne. En fait, cette gestion n\u2019est pas le fait d\u2019un choix effectu\u00e9 de longue date, mais plut\u00f4t le r\u00e9sultat de longues p\u00e9riodes de d\u00e9vastations ou, tout simplement, d\u2019absence de gestion prolong\u00e9e. Il faut ajouter que les conditions stationelles sont favorables aux essences les plus adapt\u00e9es pour la futaie jardin\u00e9e, \u00e0 savoir le sapin pectin\u00e9 et l\u2019\u00e9pic\u00e9a commun. En effet, on y trouve des altitudes comprises entre 400 et 800 m\u00e8tres, des pr\u00e9cipitations variant de 800 \u00e0 1500 mm, et le substrat g\u00e9ologique compos\u00e9 de gr\u00e8s bigarr\u00e9, granit et gneiss donne des sols plut\u00f4t acides. Plus le peuplement est irr\u00e9gulier, plus la part de sapin est importante. Alors que les premi\u00e8res typologies en futaie jardin\u00e9e se basaient sur un ensemble de variables \u00e0 observer (surface terri\u00e8re, proportion des diff\u00e9rentes classes de diam\u00e8tre et volume), la typologie utilis\u00e9e en For\u00eat Noire se base sur trois cat\u00e9gories de diam\u00e8tre, \u00e0 savoir les petit bois (7-25 cm), les bois moyens (25-50 cm) et les gros et tr\u00e8s gros bois (50 et plus). Dans chacune de ces cat\u00e9gories, on compare le nombre d\u2019arbres r\u00e9els avec un nombre id\u00e9al, celui de la norme. On peut alors attribuer \u00e0 ces cat\u00e9gories un chiffre, 1, 2 ou 3, en sachant que \u00ab 1 \u00bb signifie un nombre de tiges inf\u00e9rieur \u00e0 la norme, \u00ab 2 \u00bb un nombre de tiges sensiblement \u00e9gal \u00e0 celui de la norme, et \u00ab 3 \u00bb un nombre de tiges exc\u00e9dentaire. On obtient ainsi un nombre \u00e0 trois chiffres qui d\u00e9finit le type de structure du peuplement \u00e9tudi\u00e9. Par exemple, le type \u00ab 222 \u00bb correspond \u00e0 la r\u00e9partition id\u00e9ale, \u00ab 122 \u00bb indique un type de peuplement d\u00e9ficitaire en petits bois et \u00ab 231 \u00bb un d\u00e9ficit de gros bois et un exc\u00e8s de bois moyens. Bien qu\u2019au total on obtienne en th\u00e9orie vingt-sept possibilit\u00e9s diff\u00e9rentes de types de structure, cette typologie, pragmatique et simple d\u2019utilisation, renseigne le type de peuplement actuel rien que par son appellation et permet d\u2019orienter les op\u00e9rations sylvicoles ult\u00e9rieures. [A.D.]<\/p>","protected":false},"excerpt":{"rendered":"<p>La futaie jardin\u00e9e est une forme de gestion irr\u00e9guli\u00e8re, dont la courbe de distribution des tiges repr\u00e9sente une hyperbole. Cela signifie que des arbres de toutes dimensions cohabitent dans un m\u00eame peuplement, mais o\u00f9 chacune des classes de diam\u00e8tre poss\u00e8de un nombre constant de tiges. On parle alors de structure irr\u00e9guli\u00e8re \u00e0 l\u2019\u00e9tat d\u2019\u00e9quilibre. Ce [&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>La gestion des futaies jardin\u00e9es en For\u00eat Noire - 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\/la-gestion-des-futaies-jardinees-en-foret-noire\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La gestion des futaies jardin\u00e9es en For\u00eat Noire - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"La futaie jardin\u00e9e est une forme de gestion irr\u00e9guli\u00e8re, dont la courbe de distribution des tiges repr\u00e9sente une hyperbole. Cela signifie que des arbres de toutes dimensions cohabitent dans un m\u00eame peuplement, mais o\u00f9 chacune des classes de diam\u00e8tre poss\u00e8de un nombre constant de tiges. On parle alors de structure irr\u00e9guli\u00e8re \u00e0 l\u2019\u00e9tat d\u2019\u00e9quilibre. 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