{"id":1917,"date":"2022-08-17T09:43:41","date_gmt":"2022-08-17T07:43:41","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=1917"},"modified":"2023-03-07T09:23:48","modified_gmt":"2023-03-07T08:23:48","slug":"essai-colza-associe","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/essai-colza-associe\/","title":{"rendered":"Colza associ\u00e9"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Du colza associ\u00e9 pour r\u00e9duire les intrants et am\u00e9liorer la fertilit\u00e9 du sol\u00a0!<\/h1>\n\n\n\n<p>Le <a href=\"https:\/\/www.cerfrance.fr\/agence-expert-comptable\/cerfrance-orne\/alencon\" target=\"_blank\" rel=\"noreferrer noopener\">Cerfrance Orne<\/a> a conduit un <strong>essai de colza associ\u00e9 en 2019-2020 <\/strong>afin d\u2019observer l<strong>\u2019impact technique et \u00e9conomique<\/strong> de cette pratique. Il en ressort que, malgr\u00e9 un investissement en semences plus \u00e9lev\u00e9, les \u00e9conomies en produits phytosanitaires et en engrais azot\u00e9 mais surtout un rendement plus \u00e9lev\u00e9 de 5,5 \u00e0 6,4 q\/ha permettent d\u2019obtenir une marge de 50 \u00e0 146 \u20ac sup\u00e9rieure au colza non associ\u00e9.<\/p>\n\n\n<div class=\"_3d-flip-book  fb3d-fullscreen-mode full-size\" data-id=\"1915\" 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<h2 class=\"wp-block-heading\">Comparaison de trois itin\u00e9raires de colza<\/h2>\n\n\n\n<p>Le semis a \u00e9t\u00e9 effectu\u00e9 le 26 ao\u00fbt 2019 dans des conditions s\u00e9chantes. Les vari\u00e9t\u00e9s de colza implant\u00e9es \u00e9taient RGT Cadran\/LG Architect (92 %) et ES Alicia (8 %). Le sol est limono-argileux. <strong>Trois itin\u00e9raires ont \u00e9t\u00e9 men\u00e9s<\/strong> et sont pr\u00e9sent\u00e9s dans le tableau ci-dessous :<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" width=\"566\" height=\"521\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/comparaison-trois-itineraires-colza-associe-1.png?resize=566%2C521&#038;ssl=1\" alt=\"Comparaison des trois itin\u00e9raires  men\u00e9s pour les essais de colza associ\u00e9\" class=\"wp-image-1919\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/comparaison-trois-itineraires-colza-associe-1.png?w=566&amp;ssl=1 566w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/comparaison-trois-itineraires-colza-associe-1.png?resize=300%2C276&amp;ssl=1 300w\" sizes=\"(max-width: 566px) 100vw, 566px\" \/><figcaption>Comparaison des trois itin\u00e9raires  men\u00e9s pour les essais de colza associ\u00e9<\/figcaption><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\" style=\"border-radius:0px\"><figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"487\" height=\"543\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/Parcelles-essais-colza-associe.png?resize=487%2C543&#038;ssl=1\" alt=\"Parcelles des essais de colza associ\u00e9\" class=\"wp-image-1920\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/Parcelles-essais-colza-associe.png?w=487&amp;ssl=1 487w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/Parcelles-essais-colza-associe.png?resize=269%2C300&amp;ssl=1 269w\" sizes=\"(max-width: 487px) 100vw, 487px\" \/><figcaption>Parcelles des essais de colza associ\u00e9<\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Essai 1\u00a0de colza associ\u00e9 :<\/h3>\n\n\n\n<p>On observe une <strong>lev\u00e9e h\u00e9t\u00e9rog\u00e8ne<\/strong> et une <strong>concurrence par le couvert vis-\u00e0-vis de l\u2019eau<\/strong> \u00e0 l\u2019implantation. Le colza associ\u00e9 s\u2019en est toutefois mieux sorti face \u00e0 l&rsquo;exc\u00e8s d\u2019eau de l\u2019automne et de l\u2019hiver. Malgr\u00e9 une pr\u00e9sence importante de larves d\u2019altises, l\u2019association avec le couvert a permis une meilleure r\u00e9sistance face \u00e0 celles-ci.<\/p>\n\n\n\n<p>Le couvert a \u00e9t\u00e9 d\u00e9truit chimiquement car la vesce n\u2019avait pas gel\u00e9 et des repousses de c\u00e9r\u00e9ales \u00e9taient pr\u00e9sentes.<\/p>\n\n\n\n<p>Une \u00e9<strong>conomie de 30 unit\u00e9s d\u2019azote<\/strong> a donc \u00e9t\u00e9 permise gr\u00e2ce au couvert. A noter \u00e9galement que la parcelle pr\u00e9sentait moins d\u2019adventices au moment de la r\u00e9colte que les 2 autres essais.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Essai 2 de colza non associ\u00e9 :<\/h2>\n\n\n\n<p>Le <strong>colza non associ\u00e9 a souffert \u00e0 la fois du manque d\u2019eau<\/strong> \u00e0 l\u2019implantation et de l&rsquo;exc\u00e8s d\u2019eau \u00e0 l\u2019automne.<\/p>\n\n\n\n<p>Il a \u00e9galement \u00e9t\u00e9 observ\u00e9 une<strong> forte pr\u00e9sence de larves d\u2019altises<\/strong> le 19 f\u00e9vrier 2020 avec une moindre r\u00e9sistance du colza. Il y avait davantage d\u2019adventices \u00e0 la r\u00e9colte.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Essai 3 de colza non associ\u00e9<\/h3>\n\n\n\n<p>Comme pour l\u2019essai 2, le colza non associ\u00e9 a souffert du manque d\u2019eau \u00e0 l\u2019implantation et par la suite de l&rsquo;exc\u00e8s d\u2019eau en automne. On observait une <strong>tr\u00e8s forte irr\u00e9gularit\u00e9 des lev\u00e9es<\/strong>.<\/p>\n\n\n\n<p>Cependant \u00e0 la <strong>reprise en v\u00e9g\u00e9tation, la colza \u00e9tait bien plus fort en terme de biomasse<\/strong> et il y avait peu, voire pas du tout, de larves d\u2019altises. Cela peut probablement s\u2019expliquer par le <strong>taux de mati\u00e8re organique plus \u00e9lev\u00e9 de la parcelle<\/strong>, permettant au colza d\u2019\u00eatre plus vigoureux.<\/p>\n\n\n\n<p>L\u2019<strong>association avec des l\u00e9gumineuses a permis au colza un meilleur d\u00e9veloppement <\/strong>(notamment face \u00e0 l&rsquo;exc\u00e8s d\u2019eau) et une <strong>augmentation des \u00e9l\u00e9ments min\u00e9raux disponibles<\/strong> pour la culture ainsi qu\u2019un meilleur contr\u00f4le des adventices. Cet essai sur la<strong> campagne 2019\/2020 a mis en \u00e9vidence l\u2019importance de la mati\u00e8re organique<\/strong> et donc de la fertilit\u00e9 du sol pour la bonne croissance de la culture, la <strong>fourniture des \u00e9l\u00e9ments min\u00e9raux et la stimulation de l\u2019auto d\u00e9fense<\/strong> de la plante face aux diff\u00e9rents bioagresseurs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Une marge plus \u00e9lev\u00e9e pour le colza associ\u00e9<\/h2>\n\n\n\n<p>Les rendements obtenus sont&nbsp;:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>&nbsp;<\/td><td>Essai 1<\/td><td>Essai 2<\/td><td>Essai 3<\/td><\/tr><tr><td>R\u00e9colte le 28\/07\/2020<\/td><td>32,2 q\/ha<\/td><td>25,8 q\/ha<\/td><td>26,7 q\/ha<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Les marges ont \u00e9t\u00e9 calcul\u00e9es et sont pr\u00e9sent\u00e9es dans le tableau suivant :<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"732\" height=\"544\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/marges-calculees-pour-les-essais-de-colza-associe.png?resize=732%2C544&#038;ssl=1\" alt=\"Les marges calcul\u00e9es pour les essais de colza associ\u00e9\" class=\"wp-image-1921\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/marges-calculees-pour-les-essais-de-colza-associe.png?w=732&amp;ssl=1 732w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/08\/marges-calculees-pour-les-essais-de-colza-associe.png?resize=300%2C223&amp;ssl=1 300w\" sizes=\"(max-width: 732px) 100vw, 732px\" \/><figcaption>Les marges calcul\u00e9es pour les essais de colza associ\u00e9<\/figcaption><\/figure><\/div>\n\n\n\n<p>La <strong>marge colza associ\u00e9 est sup\u00e9rieure aux autres essais<\/strong>. Cela s\u2019explique par l\u2019obtention d\u2019un <strong>meilleur rendement avec moins d\u2019engrais azot\u00e9 que la modalit\u00e9 2 et moins d\u2019herbicide<\/strong>. La marge aurait pu encore \u00eatre meilleure car le co\u00fbt de semences est plus \u00e9lev\u00e9 que pr\u00e9vu. En effet, le couvert a \u00e9t\u00e9 sem\u00e9 \u00e0 106 kg\/ha au lieu de 70 kg\/ha \u00e0 cause d\u2019un mauvais r\u00e9glage de semoir. Le surco\u00fbt est de 60 \u20ac\/ha.<\/p>\n\n\n\n<p>Par ailleurs, <strong>pour les essais 2 et 3, le d\u00e9sherbage est peu \u00e9lev\u00e9 du fait de l\u2019ann\u00e9e et il n\u2019y a pas eu d\u2019insecticides<\/strong>. Une conduite plus classique pour le secteur augmenterait ce poste d\u2019environ 100 \u20ac\/ha.<\/p>\n\n\n\n<p>D\u00e9couvrez toutes nos publications sur la <a href=\"https:\/\/normandiemaine.cerfrance.fr\/arad2\/category\/reductions-dintrants-en-cultures-et-en-elevage\/proteger-les-cultures\/\" target=\"_blank\" rel=\"noreferrer noopener\">protection des cultures<\/a> en libre acc\u00e8s sur notre site internet.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Du colza associ\u00e9 pour r\u00e9duire les intrants et am\u00e9liorer la fertilit\u00e9 du sol\u00a0!<\/p>\n","protected":false},"author":4,"featured_media":1925,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","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":"","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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