{"id":44369,"date":"2024-10-23T16:43:34","date_gmt":"2024-10-23T14:43:34","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&p=44369"},"modified":"2024-10-23T16:43:34","modified_gmt":"2024-10-23T14:43:34","slug":"impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/","title":{"rendered":"Impact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re"},"content":{"rendered":"

Sur sol pauvre, le cycle des \u00e9l\u00e9ments a pour effet de redistribuer verticalement les \u00e9l\u00e9ments nutritifs en les concentrant dans l\u2019humus qui joue d\u00e8s lors un r\u00f4le important dans la nutrition. Les fines racines du peuplement s\u2019y d\u00e9veloppent de mani\u00e8re pr\u00e9f\u00e9rentielle comparativement au sol min\u00e9ral car elles y trouvent ces \u00e9l\u00e9ments en haute concentration et relativement disponibles. Dans le sol min\u00e9ral, ceux-ci sont souvent retenus fortement et donc moins accessibles aux racines. Sur base de ce constat, la recherche d\u00e9velopp\u00e9e ici visait \u00e0 d\u00e9montrer l\u2019effet de l\u2019intensit\u00e9 de l\u2019\u00e9claircie sur l\u2019\u00e9paisseur de l\u2019humus et si cette \u00e9paisseur pouvait, elle, influencer la nutrition min\u00e9rale de la pessi\u00e8re. Le lien entre densit\u00e9 et accumulation de mati\u00e8re organique a \u00e9t\u00e9 clairement \u00e9tabli avec, par exemple, des stocks de mati\u00e8res s\u00e8ches de 45 et 60 tonnes \u00e0 l\u2019hectare pour des surfaces terri\u00e8res de, respectivement, 30 et 50 m\u00b2\/ha. Au niveau de la nutrition min\u00e9rale, un lien clair a \u00e9t\u00e9 \u00e9tabli avec la densit\u00e9 du peuplement (et donc l\u2019\u00e9paisseur d\u2019humus) pour le phosphore uniquement. Cet effet est enregistr\u00e9 sur les aiguilles de 1 et 2 ans. Les auteurs d\u2019en conclure que \u00ab d\u2019un point de vue de la nutrition min\u00e9rale et lorsqu\u2019on est en pr\u00e9sence d\u2019un sol pauvre, le traitement en futaie jardin\u00e9e avec des coupes adapt\u00e9es et mod\u00e9r\u00e9es semble \u00eatre le plus ad\u00e9quat car il permet le maintien de l\u2019humus tout au long du cycle de vie de l\u2019arbre. \u00bb<\/p>","protected":false},"excerpt":{"rendered":"

Sur sol pauvre, le cycle des \u00e9l\u00e9ments a pour effet de redistribuer verticalement les \u00e9l\u00e9ments nutritifs en les concentrant dans l\u2019humus qui joue d\u00e8s lors un r\u00f4le important dans la nutrition. Les fines racines du peuplement s\u2019y d\u00e9veloppent de mani\u00e8re pr\u00e9f\u00e9rentielle comparativement au sol min\u00e9ral car elles y trouvent ces \u00e9l\u00e9ments en haute concentration et […]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"\nImpact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re - 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\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Impact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Sur sol pauvre, le cycle des \u00e9l\u00e9ments a pour effet de redistribuer verticalement les \u00e9l\u00e9ments nutritifs en les concentrant dans l\u2019humus qui joue d\u00e8s lors un r\u00f4le important dans la nutrition. Les fines racines du peuplement s\u2019y d\u00e9veloppent de mani\u00e8re pr\u00e9f\u00e9rentielle comparativement au sol min\u00e9ral car elles y trouvent ces \u00e9l\u00e9ments en haute concentration et […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/\" \/>\n<meta property=\"og:site_name\" content=\"For\u00eat.Nature\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/\",\"url\":\"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/\",\"name\":\"Impact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re - For\u00eat.Nature\",\"isPartOf\":{\"@id\":\"https:\/\/foretnature.be\/en\/#website\"},\"datePublished\":\"2024-10-23T14:43:34+00:00\",\"dateModified\":\"2024-10-23T14:43:34+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/foretnature.be\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Impact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/foretnature.be\/en\/#website\",\"url\":\"https:\/\/foretnature.be\/en\/\",\"name\":\"For\u00eat.Nature\",\"description\":\"Une \u00e9quipe technique au service de la for\u00eat\",\"publisher\":{\"@id\":\"https:\/\/foretnature.be\/en\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/foretnature.be\/en\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/foretnature.be\/en\/#organization\",\"name\":\"For\u00eat.Nature\",\"url\":\"https:\/\/foretnature.be\/en\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/foretnature.be\/en\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/foretnature.be\/wp-content\/uploads\/2021\/01\/logoFOblanc.png\",\"contentUrl\":\"https:\/\/foretnature.be\/wp-content\/uploads\/2021\/01\/logoFOblanc.png\",\"width\":300,\"height\":151,\"caption\":\"For\u00eat.Nature\"},\"image\":{\"@id\":\"https:\/\/foretnature.be\/en\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Impact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re - For\u00eat.Nature","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/foretnature.be\/en\/article-foret-nature\/impact-de-lintensite-declaircie-sur-lhumus-et-sur-les-teneurs-foliaires-en-pessiere\/","og_locale":"en_GB","og_type":"article","og_title":"Impact de l\u2019intensit\u00e9 d\u2019\u00e9claircie sur l\u2019humus et sur les teneurs foliaires en pessi\u00e8re - For\u00eat.Nature","og_description":"Sur sol pauvre, le cycle des \u00e9l\u00e9ments a pour effet de redistribuer verticalement les \u00e9l\u00e9ments nutritifs en les concentrant dans l\u2019humus qui joue d\u00e8s lors un r\u00f4le important dans la nutrition. 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