{"id":40406,"date":"2024-02-12T14:34:39","date_gmt":"2024-02-12T13:34:39","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&p=40406"},"modified":"2024-02-12T14:34:39","modified_gmt":"2024-02-12T13:34:39","slug":"relation-entre-la-morphologie-des-cimes-et-la-croissance-des-arbres","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/relation-entre-la-morphologie-des-cimes-et-la-croissance-des-arbres\/","title":{"rendered":"Relation entre la morphologie des cimes et la croissance des arbres"},"content":{"rendered":"

Une \u00e9tude allemande montre que la structure de la cime d\u2019un arbre refl\u00e8te l’\u00e9volution de la croissance du diam\u00e8tre de sa tige (visualis\u00e9es par les cernes). Les tests ont \u00e9t\u00e9 r\u00e9alis\u00e9s sur un \u00e9chantillon d\u2019\u00e9pic\u00e9as (Picea abies) matures dans des peuplements monosp\u00e9cifiques soumis \u00e0 un essai combin\u00e9 d’espacement et d’\u00e9claircie. Les couronnes observ\u00e9es et scann\u00e9es refl\u00e8tent \u00e9galement l’acclimatation de la couronne \u00e0 son voisinage et les pertes de parties de la couronne dues \u00e0 la comp\u00e9tition ou \u00e0 l’abrasion m\u00e9canique (\u00ab timidit\u00e9 de la couronne \u00bb).<\/p>\n

L\u2019image ci-dessus d\u00e9crit les hypoth\u00e8ses test\u00e9es par les chercheurs sur la relation entre le d\u00e9veloppement des cernes de la tige \u00e0 1,30 m\u00e8tre et la structure de la cime de l’\u00e9pic\u00e9a. Selon que la largeur des cernes de l’arbre est r\u00e9guli\u00e8re (a), irr\u00e9guli\u00e8re (b), d\u00e9croissante (c) ou augmentant avec l’\u00e2ge de l’arbre (d), les formes de la cime peuvent \u00eatre respectivement r\u00e9guli\u00e8res, irr\u00e9guli\u00e8res, parabo\u00efdales ou n\u00e9ilo\u00efdales.<\/p>\n

Les auteurs ont trouv\u00e9 des relations particuli\u00e8rement \u00e9troites entre la courbe de croissance et la taille et la forme de la cime. Cela permet plusieurs utilisations. La taille et la variabilit\u00e9 de la couronne peuvent \u00eatre utilis\u00e9es pour estimer l’\u00e9volution de la croissance du diam\u00e8tre. La relation mise en \u00e9vidence par les chercheurs peut \u00eatre utilis\u00e9e pour \u00e9valuer la croissance pass\u00e9e et future et l\u2019esp\u00e9rance de vie des arbres. Ces r\u00e9sultats peuvent \u00eatre utiles pour surveiller le potentiel de d\u00e9fense contre le stress, la r\u00e9sistance et la r\u00e9silience des arbres.<\/p>","protected":false},"excerpt":{"rendered":"

Une \u00e9tude allemande montre que la structure de la cime d\u2019un arbre refl\u00e8te l’\u00e9volution de la croissance du diam\u00e8tre de sa tige (visualis\u00e9es par les cernes). Les tests ont \u00e9t\u00e9 r\u00e9alis\u00e9s sur un \u00e9chantillon d\u2019\u00e9pic\u00e9as (Picea abies) matures dans des peuplements monosp\u00e9cifiques soumis \u00e0 un essai combin\u00e9 d’espacement et d’\u00e9claircie. Les couronnes observ\u00e9es et scann\u00e9es […]<\/p>","protected":false},"featured_media":40407,"template":"","categories":[50],"acf":[],"yoast_head":"\nRelation entre la morphologie des cimes et la croissance des arbres - 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\/relation-entre-la-morphologie-des-cimes-et-la-croissance-des-arbres\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Relation entre la morphologie des cimes et la croissance des arbres - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Une \u00e9tude allemande montre que la structure de la cime d\u2019un arbre refl\u00e8te l’\u00e9volution de la croissance du diam\u00e8tre de sa tige (visualis\u00e9es par les cernes). 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