{"id":2877,"date":"2015-03-03T12:29:16","date_gmt":"2015-03-03T12:29:16","guid":{"rendered":"http:\/\/kbivb.mailbox-belgium.com\/fr\/?p=2877"},"modified":"2015-12-03T16:36:10","modified_gmt":"2015-12-03T15:36:10","slug":"semis-hatifs-pas-avant-le-10-mars","status":"publish","type":"post","link":"https:\/\/www.irbab-kbivb.be\/fr\/semis-hatifs-pas-avant-le-10-mars\/","title":{"rendered":"Semis h\u00e2tifs : pas avant le 10 mars"},"content":{"rendered":"<p><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2015\/03\/uitzaai3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"rounded alignleft wp-image-4744 size-medium\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2015\/03\/uitzaai3-300x194.png\" alt=\"uitzaai3\" width=\"300\" height=\"194\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2015\/03\/uitzaai3-300x194.png 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2015\/03\/uitzaai3-150x97.png 150w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2015\/03\/uitzaai3.png 737w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Suite au risque de mont\u00e9e \u00e0 graines selon les conditions climatiques actuelles (r\u00e9chauffement climatique g\u00e9n\u00e9ral), on recommande de ne pas effectuer de semis de betterave avant le 10 mars dans nos r\u00e9gions. Le risque de mont\u00e9e \u00e0 graine est plus important en cas de printemps froid et de semis tr\u00e8s pr\u00e9coces. Certaines vari\u00e9t\u00e9s doubles tol\u00e9rantes rhizomanie-rhizoctone sont plus sensibles \u00e0 la montaison. Un semis trop h\u00e2tif avec de telles vari\u00e9t\u00e9s engendre un risque r\u00e9el d&rsquo;observer un nombre important de betteraves mont\u00e9es par hectare. Mieux vaut attendre une climatologie plus douce (temp\u00e9ratures nocturnes sup\u00e9rieures \u00e0 5\u00b0C) et un sol r\u00e9chauff\u00e9 avant de semer ce type de vari\u00e9t\u00e9s.<br \/>\nEn cas de semis h\u00e2tif, ne d\u00e9passez pas 21 cm de distance entre graines en terre labour\u00e9e ou 20 cm en terre non labour\u00e9e.<br \/>\nEn 2011 et en 2012, les semis h\u00e2tifs effectu\u00e9s vers la mi-mars dans les essais de l&rsquo;IRBAB ont montr\u00e9 un gain significatif de rendement par rapport aux semis effectu\u00e9s vers le d\u00e9but avril. Dans ces essais, le gain moyen \u00e9tait de \u00b1 2 t de rendement sucre brut\/ha, soit \u00b1 10 t\/ha rendement racines en plus avec 20 jours de v\u00e9g\u00e9tation en plus (entre les 2 dates de semis).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Suite au risque de mont\u00e9e \u00e0 graines selon les conditions climatiques actuelles (r\u00e9chauffement climatique g\u00e9n\u00e9ral), on recommande de ne pas effectuer de semis de betterave avant le 10 mars dans nos r\u00e9gions. Le risque de mont\u00e9e \u00e0 graine est plus important en cas de printemps froid et de semis tr\u00e8s pr\u00e9coces. Certaines vari\u00e9t\u00e9s doubles tol\u00e9rantes [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":4744,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":1,"footnotes":""},"categories":[202],"tags":[243],"class_list":["post-2877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technique-de-semis","tag-messages"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Semis h\u00e2tifs : pas avant le 10 mars - IRBAB-KBIVB<\/title>\n<meta name=\"description\" content=\"Suite au risque de mont\u00e9e \u00e0 graines selon les conditions climatiques actuelles (r\u00e9chauffement climatique g\u00e9n\u00e9ral), on recommande de ne pas effectuer de semis de betterave avant le 10 mars dans nos r\u00e9gions.\" \/>\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\/semis-hatifs-pas-avant-le-10-mars\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Semis h\u00e2tifs : pas avant le 10 mars - 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