{"id":6776,"date":"2016-02-15T14:50:47","date_gmt":"2016-02-15T13:50:47","guid":{"rendered":"http:\/\/www.irbab-kbivb.be\/fr\/?p=6776"},"modified":"2016-02-19T14:54:06","modified_gmt":"2016-02-19T13:54:06","slug":"fumure-azotee-minerale-de-la-betterave-sucriere-augmenter-la-dose-naugmente-pas-le-rendement","status":"publish","type":"post","link":"https:\/\/www.irbab-kbivb.be\/fr\/fumure-azotee-minerale-de-la-betterave-sucriere-augmenter-la-dose-naugmente-pas-le-rendement\/","title":{"rendered":"Fumure azot\u00e9e min\u00e9rale de la betterave sucri\u00e8re: augmenter la dose n&#8217;augmente pas le rendement ! <em>(Betteravier mars 2016)<\/em>"},"content":{"rendered":"<p><em>extrait de l&#8217;article publi\u00e9 dans &lsquo;le Betteravier&rsquo; de mars 2016<\/em><\/p>\n<p><!--more--><\/p>\n<p>Si l&rsquo;on retrace l&rsquo;\u00e9volution des rendements betteraviers depuis ces 20 derni\u00e8res ann\u00e9es, il est coutumier de dire que ceux-ci augmentent, selon une r\u00e9gression lin\u00e9aire, de \u00b12% par an. Cette \u00e9volution se confirme \u00e9galement sur ces dix derni\u00e8res ann\u00e9es. Elle est actuellement de +354 kg\/an de sucre polaris\u00e9 par hectare (Sha). On est ainsi pass\u00e9, en Belgique, de 11,42 t Sha en 2005 \u00e0 14,96 t Sha en 2015.<br \/>\nTout le monde s&rsquo;accordera \u00e0 dire qu&rsquo;il n&rsquo;en est pas de m\u00eame pour la fumure azot\u00e9e de la betterave. La dose de fumure azot\u00e9e n\u00e9cessaire \u00e0 la culture de la betterave correspond \u00e0 un compl\u00e9ment de fertilisation que le betteravier apporte pour compl\u00e9ter ce que la min\u00e9ralisation naturelle du sol fournit d\u00e9j\u00e0 chaque ann\u00e9e \u00e0 la culture. C&rsquo;est aussi et surtout un compl\u00e9ment de fertilisation destin\u00e9 \u00e0 garantir la rentabilit\u00e9 de la culture. Cependant, dans ce m\u00eame laps de temps, les conseils de fertilisation min\u00e9rale azot\u00e9e propos\u00e9s par l&rsquo;IRBAB n&rsquo;ont pas \u00e9t\u00e9 augment\u00e9s de 2% par an. Pour une dose de, par exemple, 100 kg N\/ha conseill\u00e9e en 1995 pour une situation donn\u00e9e, l&rsquo;avis de fumure th\u00e9orique n&rsquo;est pas pass\u00e9 \u00e0 une dose de 140 kg N\/ha en 2015.<br \/>\nDe par les essais r\u00e9alis\u00e9s chaque ann\u00e9e par l&rsquo;IRBAB, on observe que les besoins en azote de la betterave n&rsquo;ont pas augment\u00e9 pour obtenir des rendements chaque ann\u00e9e plus \u00e9lev\u00e9s. La g\u00e9n\u00e9tique des nouvelles vari\u00e9t\u00e9s est \u00e9videmment l&rsquo;\u00e9l\u00e9ment majeur \u00e0 consid\u00e9rer dans ce cas. Chaque ann\u00e9e, l&rsquo;IRBAB met en place de grandes plates-formes d&rsquo;essais, pour ces essais vari\u00e9taux entre autres. Dans ces parcelles, toutes les interventions en culture sont r\u00e9alis\u00e9es par les agriculteurs-exp\u00e9rimentateurs, en commun accord avec les recommandations \u00e9tablies par l&rsquo;IRBAB (analyse de sol, fumure azot\u00e9e, pr\u00e9paration du sol, d\u00e9sherbage, traitement fongicide, etc.).<br \/>\nDans ces plates-formes, la fumure azot\u00e9e est \u00e9tablie sur base d&rsquo;une analyse du profil du sol, r\u00e9alis\u00e9e en f\u00e9vrier, et d&rsquo;un conseil de fumure \u00e9tabli en utilisant le module th\u00e9orique de l&rsquo;IRBAB.<\/p>\n<p>&nbsp;<\/p>\n<p>Auteurs: Guy Legrand,\u00a0Andr\u00e9 Wauters &amp; Johan Keleman<\/p>\n<hr \/>\n<p><em>L&#8217;article complet avec chiffres peut \u00eatre t\u00e9l\u00e9charg\u00e9 ici:<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>extrait de l&#8217;article publi\u00e9 dans &lsquo;le Betteravier&rsquo; de mars 2016<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":4,"footnotes":""},"categories":[203],"tags":[169],"class_list":["post-6776","post","type-post","status-publish","format-standard","hentry","category-fertilisation","tag-articles-presentations"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fumure azot\u00e9e min\u00e9rale de la betterave sucri\u00e8re: augmenter la dose n&#039;augmente pas le rendement ! (Betteravier mars 2016) - IRBAB-KBIVB<\/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:\/\/www.irbab-kbivb.be\/fr\/fumure-azotee-minerale-de-la-betterave-sucriere-augmenter-la-dose-naugmente-pas-le-rendement\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fumure azot\u00e9e min\u00e9rale de la betterave sucri\u00e8re: augmenter la dose n&#039;augmente pas le rendement ! 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