{"id":918,"date":"2017-12-20T19:00:00","date_gmt":"2017-12-20T18:00:00","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=918"},"modified":"2023-03-07T09:24:06","modified_gmt":"2023-03-07T08:24:06","slug":"etudier-le-stade-de-developpement-precoce-des-legumineuses-pour-mieux-travailler-les-associations-et-la-competition-vis-a-vis-des-adventices","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/etudier-le-stade-de-developpement-precoce-des-legumineuses-pour-mieux-travailler-les-associations-et-la-competition-vis-a-vis-des-adventices\/","title":{"rendered":"Stade de d\u00e9veloppement pr\u00e9coce des l\u00e9gumineuses"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Etudier le stade de d\u00e9veloppement pr\u00e9coce des l\u00e9gumineuses pour mieux travailler les associations et la comp\u00e9tition vis-\u00e0-vis des adventices<\/h1>\n\n\n\n<p>D\u00e9couvrez dans cette publication l&rsquo;importance des l&rsquo;\u00e9tude du stage de d\u00e9veloppement pr\u00e9coce des l\u00e9gumineuses pour :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>un meilleur travail des associations,<\/li><li>la comp\u00e9tition vis \u00e0 vis des adventices.<\/li><\/ul>\n\n\n\n<p>La<strong> phase pr\u00e9coce de d\u00e9veloppement des plantes est une \u00e9tape cl\u00e9 dans leur capacit\u00e9 \u00e0 \u00eatre comp\u00e9titive vis-\u00e0-vis des autres esp\u00e8ces<\/strong>. En effet, \u00e0 ce stade, de faibles diff\u00e9rences de comportement peuvent en entra\u00eener de tr\u00e8s grandes. Notamment dans leur capacit\u00e9 \u00e0 utiliser les ressources du milieu. Durant le premier stade de leur d\u00e9veloppement, les l\u00e9gumineuses ont l\u2019avantage d\u2019avoir acc\u00e8s \u00e0 <strong>trois sources d\u2019azote <\/strong>: <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>les <strong>r\u00e9serves dans les semences<\/strong>, <\/li><li>l\u2019<strong>azote du sol,<\/strong><\/li><li>dans une moindre mesure, l\u2019<strong>azote atmosph\u00e9rique<\/strong>. <\/li><\/ul>\n\n\n\n<p>Elles restent en moyenne assez peu efficaces pour capter l\u2019azote du sol, les rendant, au d\u00e9marrage de leur cycle, plut\u00f4t moins comp\u00e9titives. Pour autant, toutes les l\u00e9gumineuses n\u2019ont pas le m\u00eame niveau d\u2019aptitude \u00e0 capter pr\u00e9cocement l\u2019azote du sol. En effet, <strong>dans des conditions agronomiques similaires, la contribution relative entre chacune des trois sources d\u2019azote est variable selon les esp\u00e8ces<\/strong>. Cela peut s\u2019expliquer par :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>des diff\u00e9rences de vitesse de nodulation, <\/li><li>le type d\u2019\u00e9mergence, <\/li><li>le temps d\u2019\u00e9puisement des r\u00e9serves en azote des semences.<\/li><\/ul>\n\n\n\n<p>Une <strong>\u00e9tude r\u00e9cente a \u00e9t\u00e9 men\u00e9e afin<\/strong> : <\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>d\u2019identifier les principaux traits expliquant cette <strong>variabilit\u00e9 entre esp\u00e8ces de l\u00e9gumineuses <\/strong><\/li><li>d\u2019analyser les<strong> effets d\u2019une fertilisation min\u00e9rale azot\u00e9e durant la phase pr\u00e9coce de d\u00e9veloppement<\/strong> sur la strat\u00e9gie d\u2019utilisation des diff\u00e9rentes sources d\u2019azote, en fonction des esp\u00e8ces de l\u00e9gumineuses. <\/li><\/ol>\n\n\n\n<p><strong>Neuf esp\u00e8ces de l\u00e9gumineuses ont ainsi \u00e9t\u00e9 test\u00e9es<\/strong> : fenugrec, f\u00e9verole, pois, lentille, tr\u00e8fle, vesce commune, soja, pois chiche et cacahu\u00e8te. Les <strong>diff\u00e9rentes mesures ont \u00e9t\u00e9 r\u00e9alis\u00e9es<\/strong> apr\u00e8s une p\u00e9riode de croissance de 35 jours apr\u00e8s la germination.<\/p>\n\n\n<div class=\"_3d-flip-book  fb3d-fullscreen-mode full-size\" data-id=\"917\" data-mode=\"fullscreen\" data-title=\"false\" data-template=\"short-white-book-view\" data-lightbox=\"dark-shadow\" data-urlparam=\"fb3d-page\" data-page-n=\"0\" data-pdf=\"\" data-tax=\"null\" data-thumbnail=\"\" data-cols=\"3\" data-book-template=\"default\" data-trigger=\"\"><\/div><script type=\"text\/javascript\">window.FB3D_CLIENT_DATA = window.FB3D_CLIENT_DATA || 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&& FB3D_CLIENT_LOCALE.render && FB3D_CLIENT_LOCALE.render();<\/script>\n\n\n\n<p>D\u00e9couvrez notre <a href=\"https:\/\/normandiemaine.cerfrance.fr\/arad2\/legitimite-legumineuses\/\" target=\"_blank\" rel=\"noreferrer noopener\">publication sur la l\u00e9gitimit\u00e9 des l\u00e9gumineuses<\/a> en ligne.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Etudier le stade de d\u00e9veloppement pr\u00e9coce des l\u00e9gumineuses pour mieux travailler les associations et la comp\u00e9tition vis-\u00e0-vis des adventices<\/p>\n","protected":false},"author":4,"featured_media":1474,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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