{"id":441,"date":"2014-12-23T05:00:00","date_gmt":"2014-12-23T10:00:00","guid":{"rendered":"https:\/\/maizex.com\/nouveaux-hybrides-evitez-les-pieges\/"},"modified":"2022-08-02T09:21:55","modified_gmt":"2022-08-02T13:21:55","slug":"nouveaux-hybrides-evitez-les-pieges","status":"publish","type":"post","link":"https:\/\/maizex.com\/fr\/nouveaux-hybrides-evitez-les-pieges\/","title":{"rendered":"Nouveaux hybrides \u2013 \u00c9vitez les pi\u00e8ges!"},"content":{"rendered":"<p>Que faites-vous, lorsque vous &laquo;&nbsp;essayez&nbsp;&raquo; pour la 1<sup>&egrave;re<\/sup> fois&nbsp;un nouvel hybride ou un nouveau fournisseur de semences? Souvent, on n&rsquo;ach&egrave;te que quelques sacs de semences, destin&eacute;s &agrave; la moiti&eacute; de votre semoir, et pour semer juste &agrave;-c&ocirc;t&eacute; d&rsquo;un autre hybride. Les producteurs ont certainement de bonnes intentions en semant en m&ecirc;me temps des hybrides diff&eacute;rents; toutefois, cela fausse souvent la performance attendue d&rsquo;un hybride, tout en compliquant la r&eacute;colte.<\/p>\n\n<p>Les nouveaux hybrides sont &eacute;valu&eacute;s avec rigueur durant plusieurs ann&eacute;es avant d&rsquo;&ecirc;tre introduits sur le march&eacute;. La cl&eacute; du succ&egrave;s d&rsquo;un nouvel hybride r&eacute;side dans la compr&eacute;hension des strat&eacute;gies de gestion auxquelles il faut recourir. Le semis regroup&eacute; par bloc homog&egrave;ne permet plusieurs modes d&rsquo;&eacute;valuation, sous des strat&eacute;gies particuli&egrave;res de gestion par le producteur. Par exemple, ces strat&eacute;gies particuli&egrave;res de gestion pour les hybrides peuvent comprendre la population des plants, la fertilit&eacute; et l&rsquo;application de fongicide.&nbsp;&nbsp;<\/p>\n\n<p>Selon le sc&eacute;nario qui s&rsquo;offre avec un semoir divis&eacute;, la performance pourra &ecirc;tre g&ecirc;n&eacute;e pour l&rsquo;un ou l&rsquo;autre des hybrides, &agrave; cause de caract&eacute;ristiques antagonistes; ces caract&eacute;ristiques antagonistes peuvent &ecirc;tre le r&eacute;sultat de diff&eacute;rences entre la vigueur &agrave; l&rsquo;&eacute;mergence, la croissance en d&eacute;but de saison, la date de floraison ou la hauteur du plant. La caract&eacute;ristique antagoniste la plus courante est la hauteur du plant, puisque les hybrides de taille r&eacute;duite sont d&eacute;savantag&eacute;s par rapport aux hybrides plus grands, &agrave; cause des &laquo;&nbsp;effets d&rsquo;ombrage&nbsp;&raquo;. Les r&eacute;sultats d&rsquo;une recherche effectu&eacute;e en Ontario d&eacute;montrent une diminution de rendement pouvant aller jusqu&rsquo;&agrave; 32 %, pour un hybride de taille r&eacute;duite qui c&ocirc;toie un hybride plus grand. La date de floraison peut &eacute;galement avoir des cons&eacute;quences similaires, si des stress d&rsquo;humidit&eacute; ou de chaleur se manifestent durant la pollinisation.&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<\/p>\n\n<p>Pour replacer cette situation dans un contexte pratique, les producteurs qui s&egrave;ment un hybride A (de petite taille) sur 8 rangs, c&ocirc;toyant un hybride B (de grande taille), verront une diminution de rendement de 10 % sur les 2 rangs de chaque c&ocirc;t&eacute; de leur semis de l&rsquo;hybride A. En se basant sur un rendement moyen de 175 boisseaux\/acre et un prix de 4 $\/boisseau, la perte de rendement sur ces 4 rangs qui subissent les &laquo;&nbsp;effets d&rsquo;ombrage&nbsp;&raquo; se chiffrera &agrave; 35 $\/acre pour l&rsquo;hybride A.&nbsp;&nbsp;&nbsp;<\/p>\n\n<p>Tous les hybrides de ma&iuml;s poss&egrave;dent des caract&eacute;ristiques physiques particuli&egrave;res et ce sont souvent les conditions de production qui am&egrave;nent ces caract&eacute;ristiques &agrave; changer. L&rsquo;objectif poursuivi par un semis comportant de multiples hybrides sur une m&ecirc;me exploitation agricole est de r&eacute;duire les risques du producteur. La performance d&rsquo;un hybride d&eacute;pend beaucoup de son environnement et le but recherch&eacute; devrait &ecirc;tre de g&eacute;rer les hybrides en fonction de leurs caract&eacute;ristiques particuli&egrave;res, pour limiter les effets des conditions de production.&nbsp; &nbsp;&nbsp;<\/p>\n\n<p><em>Shawn Winter, CCA-ON,<\/em><br \/>\n<em>Directeur du d&eacute;veloppement de produit chez Maizex<\/em><br \/>\n<em>Twitter<\/em> : <em>@SWinter_Maiz<\/em>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Que faites-vous, lorsque vous &laquo;&nbsp;essayez&nbsp;&raquo; pour la 1&egrave;re fois&nbsp;un nouvel hybride ou un nouveau fournisseur de semences? Souvent, on n&rsquo;ach&egrave;te que quelques sacs de semences, destin&eacute;s &agrave; la moiti&eacute; de&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":"","_tec_slr_enabled":"","_tec_slr_layout":""},"categories":[63],"tags":[440],"class_list":["post-441","post","type-post","status-publish","format-standard","hentry","category-agronomie","tag-tips-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nouveaux hybrides \u2013 \u00c9vitez les pi\u00e8ges! - Maizex Seeds Inc.<\/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:\/\/maizex.com\/fr\/nouveaux-hybrides-evitez-les-pieges\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nouveaux hybrides \u2013 \u00c9vitez les pi\u00e8ges! - Maizex Seeds Inc.\" \/>\n<meta property=\"og:description\" content=\"Que faites-vous, lorsque vous &laquo;&nbsp;essayez&nbsp;&raquo; pour la 1&egrave;re fois&nbsp;un nouvel hybride ou un nouveau fournisseur de semences? 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