{"id":443,"date":"2015-01-19T05:00:00","date_gmt":"2015-01-19T10:00:00","guid":{"rendered":"https:\/\/maizex.com\/est-ce-que-vous-le-savez\/"},"modified":"2022-08-02T09:21:55","modified_gmt":"2022-08-02T13:21:55","slug":"est-ce-que-vous-le-savez","status":"publish","type":"post","link":"https:\/\/maizex.com\/fr\/est-ce-que-vous-le-savez\/","title":{"rendered":"Est-ce que vous le savez?"},"content":{"rendered":"<p>Qui peut me dire combien de phosphore (P<sub>2<\/sub>O<sub>5<\/sub>) et de potasse (K<sub>2<\/sub>O) a &eacute;t&eacute; pr&eacute;lev&eacute; par les r&eacute;coltes des trois derni&egrave;res saisons de culture? La question a &eacute;t&eacute; pos&eacute;e &agrave; l&rsquo;auditoire par Peter Johnson lors de la Conf&eacute;rence agricole du Sud-ouest, mais sans grande r&eacute;action. Les engrais constituent un investissement consid&eacute;rable pour la production, et la capacit&eacute; de surveiller leur utilisation devient de plus en plus importante, alors que les marges de man&oelig;uvre se r&eacute;tr&eacute;cissent et que la sensibilisation du public augmente.<\/p>\n\n<p>Un outil annuel pour estimer l&rsquo;application requise d&rsquo;engrais consiste &agrave; calculer le pr&eacute;l&egrave;vement de la r&eacute;colte pr&eacute;c&eacute;dente (Tableau 1). Alors que les rendements augmentent, la quantit&eacute; de P<sub>2<\/sub>O<sub>5 <\/sub>et de K<sub>2<\/sub>O retir&eacute;s du sol augmente &eacute;galement. Vous retrouvez ci-dessous une estimation du pr&eacute;l&egrave;vement occasionn&eacute; par la r&eacute;colte, tant pour le P<sub>2<\/sub>O<sub>5 <\/sub>que pour le K<sub>2<\/sub>O, pour des rendements de r&eacute;colte sous la moyenne et au-dessus de la moyenne (Exemple 1 et 2).<\/p>\n\n<p>Pour certains producteurs, les rendements ont mont&eacute; en fl&egrave;che durant ces r&eacute;centes ann&eacute;es, &agrave; un niveau similaire &agrave; ceux de notre 2<sup>e<\/sup> exemple. Les niveaux d&rsquo;analyse du sol de l&rsquo;Ontario en P<sub>2<\/sub>O<sub>5<\/sub> et K<sub>2<\/sub>O ont d&eacute;clin&eacute;, &agrave; cause des rendements plus &eacute;lev&eacute;s des r&eacute;coltes sans remplacement des &eacute;l&eacute;ments nutritifs pr&eacute;lev&eacute;s. Un accroissement de 25 &agrave; 30 % du rendement a exig&eacute; un accroissement de 25 &agrave; 30 % du pr&eacute;l&egrave;vement requis du sol en &eacute;l&eacute;ments nutritifs.<\/p>\n\n<p>Songez &agrave; calculer un budget pour compenser le pr&eacute;l&egrave;vement d&rsquo;&eacute;l&eacute;ments nutritifs, tout en le comparant aux &eacute;l&eacute;ments nutritifs d&eacute;j&agrave; apport&eacute;s. S&rsquo;il y a une grande diff&eacute;rence, on vous recommande d&rsquo;augmenter l&rsquo;apport d&rsquo;engrais pour am&eacute;liorer la fertilit&eacute;. Le contraire est &eacute;galement vrai &ndash; si les rendements de la r&eacute;colte n&rsquo;ont pas pr&eacute;lev&eacute; les &eacute;l&eacute;ments nutritifs appliqu&eacute;s, &ccedil;a serait peut-&ecirc;tre une bonne ann&eacute;e pour r&eacute;duire votre application d&rsquo;&eacute;l&eacute;ments nutritifs, tout en &eacute;conomisant &agrave; court terme.<\/p>\n\n<p><em>Shawn Winter, CCA-ON, Semences Maizex<\/em><br \/>\n<em>Directeur du d&eacute;veloppement de produit<br \/>\nTwitter: @SWinter_Maiz&nbsp;<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>Qui peut me dire combien de phosphore (P2O5) et de potasse (K2O) a &eacute;t&eacute; pr&eacute;lev&eacute; par les r&eacute;coltes des trois derni&egrave;res saisons de culture? La question a &eacute;t&eacute; pos&eacute;e &agrave;&#8230;<\/p>\n","protected":false},"author":2,"featured_media":276,"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":[452,440],"class_list":["post-443","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agronomie","tag-gestion-des-champs","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>Est-ce que vous le savez? - 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\/est-ce-que-vous-le-savez\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Est-ce que vous le savez? - Maizex Seeds Inc.\" \/>\n<meta property=\"og:description\" content=\"Qui peut me dire combien de phosphore (P2O5) et de potasse (K2O) a &eacute;t&eacute; pr&eacute;lev&eacute; par les r&eacute;coltes des trois derni&egrave;res saisons de culture? 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