{"id":38347,"date":"2022-12-20T10:28:14","date_gmt":"2022-12-20T09:28:14","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=38347"},"modified":"2022-12-20T10:28:14","modified_gmt":"2022-12-20T09:28:14","slug":"limportance-des-racines-profondes","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/limportance-des-racines-profondes\/","title":{"rendered":"L\u2019importance des racines profondes"},"content":{"rendered":"<p>Les couches superpos\u00e9es d\u2019un sol sont appel\u00e9es \u00ab horizons \u00bb. Les horizons dits profonds remplissent des fonctions essentielles, en particulier pour le d\u00e9veloppement de la v\u00e9g\u00e9tation :<\/p>\n<p>1. Ancrage m\u00e9canique des arbres.<br \/>\n2. A\u00e9ration suffisante pour permettre une activit\u00e9 biologique et le d\u00e9veloppement racinaire.<br \/>\n3. Stockage et circulation de l\u2019eau. Une tr\u00e8s faible quantit\u00e9 de racines fines pr\u00e9sentes en profondeur peut assurer une prospection des r\u00e9serves en eau primordiale en p\u00e9riode de s\u00e9cheresse.<br \/>\n4. Remont\u00e9es du calcium et autres min\u00e9raux via les racines.<br \/>\n5. Filtrage et \u00e9puration des eaux.<br \/>\n6. Traficabilit\u00e9. Si un sol est gorg\u00e9 d\u2019eau, il offre peu de r\u00e9sistance au passage des machines. Il perd de sa portance, des tassements profonds et des orni\u00e8res apparaissent. La perte de porosit\u00e9 des horizons profonds est souvent irr\u00e9versible. Elle n\u2019est pas toujours spectaculaire et peut s\u2019installer insidieusement.<br \/>\n7. Habitat des lombrics. Les lombrics jouent un r\u00f4le majeur, en rejetant \u00e0 la surface du sol des mat\u00e9riaux organomin\u00e9raux provenant des horizons inf\u00e9rieurs et en facilitant la circulation verticale de l\u2019air et de l\u2019eau.<br \/>\n8. Stockage de carbone. Les mati\u00e8res organiques racinaires repr\u00e9sentent environ la moiti\u00e9 du stock de carbone en milieu forestier.<\/p>","protected":false},"excerpt":{"rendered":"<p>Les couches superpos\u00e9es d\u2019un sol sont appel\u00e9es \u00ab horizons \u00bb. Les horizons dits profonds remplissent des fonctions essentielles, en particulier pour le d\u00e9veloppement de la v\u00e9g\u00e9tation : 1. Ancrage m\u00e9canique des arbres. 2. A\u00e9ration suffisante pour permettre une activit\u00e9 biologique et le d\u00e9veloppement racinaire. 3. Stockage et circulation de l\u2019eau. Une tr\u00e8s faible quantit\u00e9 de [&hellip;]<\/p>","protected":false},"featured_media":38345,"template":"","categories":[50],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>L\u2019importance des racines profondes - 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\/limportance-des-racines-profondes\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019importance des racines profondes - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Les couches superpos\u00e9es d\u2019un sol sont appel\u00e9es \u00ab horizons \u00bb. Les horizons dits profonds remplissent des fonctions essentielles, en particulier pour le d\u00e9veloppement de la v\u00e9g\u00e9tation : 1. Ancrage m\u00e9canique des arbres. 2. A\u00e9ration suffisante pour permettre une activit\u00e9 biologique et le d\u00e9veloppement racinaire. 3. Stockage et circulation de l\u2019eau. 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