{"id":936,"date":"2012-09-20T19:24:00","date_gmt":"2012-09-20T17:24:00","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=936"},"modified":"2023-03-07T09:24:18","modified_gmt":"2023-03-07T08:24:18","slug":"des-cultures-pluriannuelles-dans-les-rotations-pour-un-meilleur-controle-de-la-flore-adventice","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/des-cultures-pluriannuelles-dans-les-rotations-pour-un-meilleur-controle-de-la-flore-adventice\/","title":{"rendered":"Des cultures pluriannuelles dans les rotations"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Des cultures pluriannuelles dans les rotations pour un meilleur contr\u00f4le de la flore adventice<\/h1>\n\n\n\n<p>Dans cette publication nous vous pr\u00e9sentons la <strong>place des cultures pluriannuelles dans les rotations pour un meilleur contr\u00f4le de la flore adventice<\/strong>.<\/p>\n\n\n<div class=\"_3d-flip-book  fb3d-fullscreen-mode full-size\" data-id=\"935\" 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 || [];FB3D_CLIENT_DATA.push('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');window.FB3D_CLIENT_LOCALE && FB3D_CLIENT_LOCALE.render && FB3D_CLIENT_LOCALE.render();<\/script>\n\n\n\n<p>La gestion de l\u2019enherbement au sein des syst\u00e8mes de culture (SDC) est un point cl\u00e9 de leurs performances. La simplification des SDC (raccourcissement des rotations et moindre diversit\u00e9 culturale) ainsi que l\u2019utilisation accrue de produits de synth\u00e8se montrent aujourd\u2019hui ses limites avec notamment une perte d\u2019efficacit\u00e9 des traitements due \u00e0 l\u2019apparition croissante de r\u00e9sistances et une augmentation des co\u00fbts \u00e9conomiques et \u00e9cologiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u2019effet des rotations de cultures annuelles sur les populations de mauvaises herbes<\/h2>\n\n\n\n<p>L\u2019enjeu aujourd\u2019hui est de tendre vers des syst\u00e8mes plus durables combinant plusieurs leviers techniques \u00ab alternatifs \u00bb afin d\u2019assurer une gestion de l\u2019enherbement efficace tout en<br>s\u2019affranchissant au maximum des produits de synth\u00e8se. De nombreuses m\u00e9thodes de contr\u00f4le des mauvaises herbes sont disponibles. Parmi celles-ci l\u2019allongement et la diversification des rotations tient une place pr\u00e9pond\u00e9rante. L\u2019effet des rotations de cultures annuelles sur les populations de mauvaises herbes est relativement bien connu. Une culture agit sur son milieu et se caract\u00e9rise alors par un environnement sp\u00e9cifique auquel est associ\u00e9 un cort\u00e8ge de mauvaises herbes. C\u2019est le ph\u00e9nom\u00e8ne de pression de s\u00e9lection. Alterner les cultures aux caract\u00e9ristiques diff\u00e9rentes (culture de printemps\/culture d\u2019hiver ; c\u00e9r\u00e9ales\/l\u00e9gumineuses ou crucif\u00e8res par exemple) permet alors de rompre les cycles de d\u00e9veloppement des adventices et limite ainsi l\u2019invasion des parcelles par une communaut\u00e9 d\u2019esp\u00e8ces sp\u00e9cifique.<\/p>\n\n\n\n<p>D\u2019un autre c\u00f4t\u00e9, les cultures fourrag\u00e8res p\u00e9rennes (prairies temporaires) sont reconnues pour laisser un sol propre pour la culture suivante. Ainsi, introduire des prairies temporaires dans une rotation participe \u00e0 un meilleur contr\u00f4le des adventices. Qu\u2019en est-il exactement et quels sont les\u00a0m\u00e9canismes en jeu ? Les prairies temporaires sont elles un levier de plus pour une ma\u00eetrise agro-\u00e9cologique de l\u2019enherbement \u00e0 l\u2019\u00e9chelle du SDC ? Plusieurs \u00e9tudes se sont int\u00e9ress\u00e9es \u00e0 l\u2019effet des cultures fourrag\u00e8res p\u00e9rennes sur la gestion de l\u2019enherbement. H. MEISS notamment y a consacr\u00e9 une th\u00e8se (<a href=\"https:\/\/www.theses.fr\/2010DIJOS018\" target=\"_blank\" rel=\"noreferrer noopener\">MEISS 2010<\/a>) dont nous reprenons les\u00a0principaux r\u00e9sultats dans ce dossier.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Un couvert p\u00e9renne apporte une nouvelle pression de s\u00e9lection sur les adventices<\/h2>\n\n\n\n<p>L\u2019introduction de prairies temporaires dans une rotation c\u00e9r\u00e9ali\u00e8res est un levier suppl\u00e9mentaire \u00e0 disposition des agriculteurs pour maitriser au mieux l\u2019enherbement. De part ses caract\u00e9ristiques, un couvert p\u00e9renne apporte une nouvelle pression de s\u00e9lection sur les adventices, \u00e0 l\u2019image de ce que peut apporter l\u2019alternance culture d\u2019hiver et de printemps. De plus, il apparait que de tels couverts tendent \u00e0 agir sp\u00e9cifiquement sur des esp\u00e8ces particuli\u00e8rement nuisibles en culture annuelle : gaillet, ch\u00e9nopode, morelle par exemple. <\/p>\n\n\n\n<p>Ils offrent ainsi \u00e0 la c\u00e9r\u00e9ale suivante une protection contre ses esp\u00e8ces aussi efficaces que la lutte chimique. L\u2019action du couvert se r\u00e9sume principalement en trois m\u00e9canismes compl\u00e9mentaires :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>l\u2019absence du travail du sol, <\/li><li>la comp\u00e9tition du couvert p\u00e9renne,<\/li><li>la fauche. <\/li><\/ul>\n\n\n\n<p>Ceux-ci agissent de mani\u00e8re concomitante et d\u00e9terminent la pression de s\u00e9lection particuli\u00e8re des couverts pluriannuels. Les prairies temporaires seules ne constituent toutefois pas un levier parfait. Elles sont par exemple plut\u00f4t favorables au d\u00e9veloppement des gramin\u00e9es et des adventices pluriannuelles qui m\u00eame si elles ne sont pas des plus p\u00e9nalisantes pour la culture suivante, doivent \u00eatre surveill\u00e9es et\/ou maitris\u00e9es \u00e0 l\u2019implantation. <\/p>\n\n\n\n<p>Pour une action optimale sur les esp\u00e8ces cibles et limiter le d\u00e9veloppement des esp\u00e8ces favoris\u00e9es, la dur\u00e9e d\u2019implantation ne doit \u00eatre ni trop courte, ni trop longue, 4 ann\u00e9es semblent un bon compromis. <\/p>\n\n\n\n<p>Leur action et le type d\u2019adventices cibl\u00e9 font des prairies temporaires un outil suppl\u00e9mentaire pour une gestion agro-\u00e9cologique de l\u2019enherbement.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des cultures pluriannuelles dans les rotations pour un meilleur contr\u00f4le de la flore adventice<\/p>\n","protected":false},"author":4,"featured_media":2346,"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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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[41,32],"tags":[],"class_list":["post-936","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-proteger-les-cultures","category-reductions-dintrants-en-cultures-et-en-elevage"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Des cultures pluriannuelles dans les rotations - L&#039;ARAD2<\/title>\n<meta name=\"description\" content=\"Nous vous pr\u00e9sentons un dossier sur les cultures pluriannuelles dans les rotations pour un meilleur contr\u00f4le de la flore adventice\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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