{"id":46890,"date":"2026-10-14T15:28:26","date_gmt":"2026-10-14T13:28:26","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=46890"},"modified":"2026-10-14T15:28:26","modified_gmt":"2026-10-14T13:28:26","slug":"coupes-rases-dhier-jeunes-forets-daujourdhui","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/coupes-rases-dhier-jeunes-forets-daujourdhui\/","title":{"rendered":"Coupes rases d\u2019hier, jeunes for\u00eats d\u2019aujourd\u2019hui"},"content":{"rendered":"<p>La disparition acc\u00e9l\u00e9r\u00e9e des pessi\u00e8res en Wallonie (-37\u202f% en surface entre 1980 et 2021) conjugu\u00e9e \u00e0 la crise des scolytes de 2018-2022, a profond\u00e9ment modifi\u00e9 le paysage des reconstitutions foresti\u00e8res. Les coupes rases non replant\u00e9es repr\u00e9sentaient 7\u202f% des mises \u00e0 blanc en 2006 et atteignent pr\u00e8s de 34\u202f% sur la p\u00e9riode 2013-2015. Face \u00e0 cet essor, une \u00e9tude s\u2019est attach\u00e9e \u00e0 caract\u00e9riser l\u2019\u00e9tat r\u00e9el de ces jeunes peuplements issus de r\u00e9g\u00e9n\u00e9ration naturelle, \u00e0 16-23\u202fans apr\u00e8s coupe rase, et \u00e0 \u00e9valuer leur potentiel de valorisation sylvicole.<\/p>\n<p>Cette \u00e9tude a \u00e9t\u00e9 r\u00e9alis\u00e9e par Gembloux Agro-Bio Tech (ULi\u00e8ge), dans le cadre du Plan quinquennal de Recherches et Vulgarisation foresti\u00e8res, avec l&rsquo;appui de la Cellule d\u2019appui \u00e0 la petite for\u00eat priv\u00e9e (Fili\u00e8re Bois Wallonie) et des Experts Forestiers de Belgique asbl,<\/p>\n<p>La m\u00e9thodologie combine deux niveaux d\u2019analyse. \u00c0 l\u2019\u00e9chelle r\u00e9gionale, la photo-interpr\u00e9tation d\u2019orthophotos successives (2001-2023) sur 11\u2009080\u202fpoints d\u2019inventaire a permis d\u2019identifier et de dater les mises \u00e0 blanc non replant\u00e9es. \u00c0 l\u2019\u00e9chelle du terrain, vingt parcelles (45\u202fhectares au total) repr\u00e9sentatives de situations \u00e0 vocation sylvicole ont fait l\u2019objet de relev\u00e9s structuraux standardis\u00e9s selon la m\u00e9thode PCQM, compl\u00e9t\u00e9s par la d\u00e9signation de tiges d\u2019avenir selon l\u2019approche QD (Qualification-Dimensionnement).<\/p>\n<p>Les r\u00e9sultats montrent une recolonisation g\u00e9n\u00e9ralement avanc\u00e9e mais tr\u00e8s h\u00e9t\u00e9rog\u00e8ne : densit\u00e9 moyenne de 1935\u202ftiges\/ha et surface terri\u00e8re moyenne de 11\u202fm\u00b2\/ha, avec une forte variabilit\u00e9 inter-parcelles. Le bouleau domine (45\u202f% de la surface terri\u00e8re), devant l\u2019\u00e9pic\u00e9a (20\u202f%) et les saules (12,5\u202f%). La densit\u00e9 moyenne de tiges d\u2019avenir s\u2019\u00e9tablit \u00e0 76,5\u202ftiges\/ha. Selon la typologie crois\u00e9e construite \u00e0 partir du vivier d\u2019arbres d\u2019avenir de qualit\u00e9 et de la densit\u00e9 du peuplement de bourrage, 10\u202f% des peuplements atteignent une r\u00e9ussite compl\u00e8te, 50\u202f% une r\u00e9ussite partielle, et le reste cumule des d\u00e9ficits n\u00e9cessitant des interventions correctrices.<\/p>\n<p>L\u2019\u00e9tude recommande une approche diagnostique syst\u00e9matique avant toute d\u00e9cision de gestion\u202f: dans les situations o\u00f9 la r\u00e9g\u00e9n\u00e9ration s\u2019est d\u00e9j\u00e0 install\u00e9e, il s\u2019agit d\u2019\u00e9tablir un diagnostic du peuplement puis, si n\u00e9cessaire, patienter au-del\u00e0 des d\u00e9lais habituels pour confirmer la trajectoire, et enfin, intervenir de fa\u00e7on cibl\u00e9e (d\u00e9pressage, d\u00e9tourage, \u00e9lagage ou enrichissement localis\u00e9) selon le profil r\u00e9el du peuplement.<\/p>","protected":false},"excerpt":{"rendered":"<p>La disparition acc\u00e9l\u00e9r\u00e9e des pessi\u00e8res en Wallonie (-37\u202f% en surface entre 1980 et 2021) conjugu\u00e9e \u00e0 la crise des scolytes de 2018-2022, a profond\u00e9ment modifi\u00e9 le paysage des reconstitutions foresti\u00e8res. Les coupes rases non replant\u00e9es repr\u00e9sentaient 7\u202f% des mises \u00e0 blanc en 2006 et atteignent pr\u00e8s de 34\u202f% sur la p\u00e9riode 2013-2015. Face \u00e0 cet [&hellip;]<\/p>\n","protected":false},"featured_media":46891,"template":"","categories":[50],"class_list":["post-46890","resume-foret-mail","type-resume-foret-mail","status-publish","has-post-thumbnail","hentry","category-foret-mail"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Coupes rases d\u2019hier, jeunes for\u00eats d\u2019aujourd\u2019hui - 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\/resume-foret-mail\/coupes-rases-dhier-jeunes-forets-daujourdhui\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Coupes rases d\u2019hier, jeunes for\u00eats d\u2019aujourd\u2019hui - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"La disparition acc\u00e9l\u00e9r\u00e9e des pessi\u00e8res en Wallonie (-37\u202f% en surface entre 1980 et 2021) conjugu\u00e9e \u00e0 la crise des scolytes de 2018-2022, a profond\u00e9ment modifi\u00e9 le paysage des reconstitutions foresti\u00e8res. Les coupes rases non replant\u00e9es repr\u00e9sentaient 7\u202f% des mises \u00e0 blanc en 2006 et atteignent pr\u00e8s de 34\u202f% sur la p\u00e9riode 2013-2015. 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