{"id":44516,"date":"2024-10-23T16:45:23","date_gmt":"2024-10-23T14:45:23","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44516"},"modified":"2024-10-23T16:45:23","modified_gmt":"2024-10-23T14:45:23","slug":"considerations-sur-la-designation-et-le-detourage-en-chenes-et-hetre","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/considerations-sur-la-designation-et-le-detourage-en-chenes-et-hetre\/","title":{"rendered":"Consid\u00e9rations sur la d\u00e9signation et le d\u00e9tourage en ch\u00eanes et h\u00eatre"},"content":{"rendered":"<p>D\u00e9tourer un arbre, c\u2019est lib\u00e9rer son houppier de toute concurrence directe. Cet article concerne l\u2019impact de l\u2019intensit\u00e9 de d\u00e9tourage sur la croissance et la qualit\u00e9 des arbres-objectif en ch\u00eane et en h\u00eatre. Il se base sur l\u2019analyse de l\u2019\u00e9volution des dispositifs de d\u00e9monstration con\u00e7us et mis en place dans le contexte de \u00ab l\u2019accord cadre de recherche et vulgarisation foresti\u00e8res \u00bb, et qui ont \u00e9t\u00e9 le support d\u2019une r\u00e9cente formation \u00e0 la sylviculture d\u2019arbres-objectif. Six dispositifs de d\u00e9tourage d\u2019environ 1 hectare sont install\u00e9s, dont trois en h\u00eatre, deux en ch\u00eane p\u00e9doncul\u00e9 et un en ch\u00eane sessile. Chaque dispositif se compose de quatre parcelles d\u2019\u00e9gale superficie contenant chacune au minimum dix arbres-objectif d\u00e9sign\u00e9s \u00e0 une distance moyenne de 11 \u00e0 13 m\u00e8tres respectivement en h\u00eatre et en ch\u00eane. Une intensit\u00e9 de d\u00e9tourage a \u00e9t\u00e9 appliqu\u00e9e via un rayon de d\u00e9tourage d\u00e9termin\u00e9 : d\u00e9tourage faible : avec un rayon de d\u00e9tourage au sol \u00e9gal \u00e0 quatre fois la circonf\u00e9rence \u00e0 1, 30 m\u00e8tre de chaque arbre-objectif (un \u00e0 deux arbres pr\u00e9lev\u00e9s par arbre-objectif) ; d\u00e9tourage moyen : six fois la circonf\u00e9rence (trois \u00e0 six arbres pr\u00e9lev\u00e9s) ; d\u00e9tourage fort : huit fois la circonf\u00e9rence (six \u00e0 neuf arbres pr\u00e9lev\u00e9s) ; d\u00e9tourage tr\u00e8s fort : dix fois la circonf\u00e9rence (onze \u00e0 seize arbres pr\u00e9lev\u00e9s). Un suivi dendrom\u00e9trique trisannuel a \u00e9t\u00e9 assur\u00e9 (mesure de la circonf\u00e9rence \u00e0 1, 30 m\u00e8tre, relev\u00e9 des gourmands, calcul de huit rayons de cimes, de huit distances \u00e0 la cime des comp\u00e9titeurs avant et apr\u00e8s d\u00e9tourage, hauteur totale, hauteur de cime). Trois ans apr\u00e8s le d\u00e9tourage, deux analyses ont \u00e9t\u00e9 men\u00e9es : une synth\u00e8se des observations par distance puis par essence ; une analyse plus pouss\u00e9e des relations entre l\u2019accroissement en circonf\u00e9rence, le d\u00e9veloppement des gourmands et les diff\u00e9rentes variables ayant trait \u00e0 la d\u00e9signation et au d\u00e9tourage.<\/p>","protected":false},"excerpt":{"rendered":"<p>D\u00e9tourer un arbre, c\u2019est lib\u00e9rer son houppier de toute concurrence directe. Cet article concerne l\u2019impact de l\u2019intensit\u00e9 de d\u00e9tourage sur la croissance et la qualit\u00e9 des arbres-objectif en ch\u00eane et en h\u00eatre. Il se base sur l\u2019analyse de l\u2019\u00e9volution des dispositifs de d\u00e9monstration con\u00e7us et mis en place dans le contexte de \u00ab l\u2019accord cadre [&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>Consid\u00e9rations sur la d\u00e9signation et le d\u00e9tourage en ch\u00eanes et h\u00eatre - 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\/considerations-sur-la-designation-et-le-detourage-en-chenes-et-hetre\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consid\u00e9rations sur la d\u00e9signation et le d\u00e9tourage en ch\u00eanes et h\u00eatre - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"D\u00e9tourer un arbre, c\u2019est lib\u00e9rer son houppier de toute concurrence directe. 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