{"id":38349,"date":"2022-12-20T10:29:59","date_gmt":"2022-12-20T09:29:59","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=38349"},"modified":"2022-12-20T10:29:59","modified_gmt":"2022-12-20T09:29:59","slug":"le-pivot-du-chene","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/le-pivot-du-chene\/","title":{"rendered":"Le pivot du ch\u00eane"},"content":{"rendered":"<p>Le ch\u00eane est une essence reconnue pour son pivot puissant, lui permettant d\u2019acqu\u00e9rir stabilit\u00e9 et ressources. Pourtant, est-ce que tous les modes de r\u00e9g\u00e9n\u00e9ration se valent sur la qualit\u00e9 ou la pr\u00e9sence de cet organe racinaire ? Face aux \u00e9pisodes de s\u00e9cheresse, tous les jeunes ch\u00eanes sont-ils arm\u00e9s de la m\u00eame mani\u00e8re pour garantir leur survie ? Une \u00e9tude polonaise \u00e0 t\u00e2cher d\u2019identifier les diff\u00e9rences de croissance, morphologie et r\u00e9sistance au manque d\u2019eau entre des pieds issus de semis (glands), des plants \u00e9lev\u00e9s en p\u00e9pini\u00e8re et des tiges issues de rejets de souches (taillis).<\/p>\n<p>Les plants de p\u00e9pini\u00e8re et les rejets de souches ont montr\u00e9 un pivot g\u00e9n\u00e9ralement peu d\u00e9velopp\u00e9, entra\u00eenant des stress plus marqu\u00e9s lors des s\u00e9cheresses par un moindre acc\u00e8s \u00e0 l\u2019eau stock\u00e9e en profondeur. Les observations ont montr\u00e9 qu\u2019un pivot bien d\u00e9velopp\u00e9 descendait profond\u00e9ment dans le sol (plus de 1,5 m) avant de s\u2019affiner pour continuer \u00e0 descendre ou pousser horizontalement. Au contraire, dans les deux autres cas, le pivot \u00e9tait remplac\u00e9 par des repousses lat\u00e9rales moins profondes.<\/p>\n<p>La croissance de l\u2019ann\u00e9e est en majorit\u00e9 influenc\u00e9e par la croissance de l\u2019ann\u00e9e pr\u00e9c\u00e9dente chez les tiges issues de ch\u00eanes sem\u00e9s tandis que dans les deux autres cas elle est influenc\u00e9e par les conditions de l\u2019ann\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"<p>Le ch\u00eane est une essence reconnue pour son pivot puissant, lui permettant d\u2019acqu\u00e9rir stabilit\u00e9 et ressources. Pourtant, est-ce que tous les modes de r\u00e9g\u00e9n\u00e9ration se valent sur la qualit\u00e9 ou la pr\u00e9sence de cet organe racinaire ? Face aux \u00e9pisodes de s\u00e9cheresse, tous les jeunes ch\u00eanes sont-ils arm\u00e9s de la m\u00eame mani\u00e8re pour garantir leur [&hellip;]<\/p>","protected":false},"featured_media":38343,"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>Le pivot du ch\u00eane - 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\/le-pivot-du-chene\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le pivot du ch\u00eane - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Le ch\u00eane est une essence reconnue pour son pivot puissant, lui permettant d\u2019acqu\u00e9rir stabilit\u00e9 et ressources. 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