{"id":26164,"date":"2024-04-30T15:23:24","date_gmt":"2024-04-30T15:23:24","guid":{"rendered":"https:\/\/prograin.ca\/ca\/?p=26164"},"modified":"2025-08-13T14:28:12","modified_gmt":"2025-08-13T14:28:12","slug":"les-impacts-des-precipitations-sur-le-soya","status":"publish","type":"post","link":"https:\/\/prograin.ca\/ca\/fr\/2024\/04\/30\/les-impacts-des-precipitations-sur-le-soya\/","title":{"rendered":"Les impacts des pr\u00e9cipitations sur le soya"},"content":{"rendered":"\n<p>Au printemps et \u00e0 l\u2019automne, il est courant de recevoir des pr\u00e9cipitations qui parfois engendrent une saturation voire une inondation des champs de soya. Les plants sont alors susceptibles de connaitre des retards d\u2019<a href=\"https:\/\/prograin.ca\/ca\/fr\/2023\/06\/08\/levaluation-de-lemergence-du-soya\/\">\u00e9mergence<\/a>, de croissance tout en \u00e9tant plus \u00e0 risque de d\u00e9velopper certaines maladies.<\/p>\n\n\n\n<p>Dans cet article, nous explorerons les facteurs qui influencent les impacts des pr\u00e9cipitations sur le soya, ainsi que les diff\u00e9rentes strat\u00e9gies pour minimiser les dommages !<\/p>\n\n\n\n<h2>La dur\u00e9e<\/h2>\n\n\n\n<p>Les cultures de soya subissent moins de dommages lors d&#8217;inondations de courte dur\u00e9e comparativement \u00e0 celles qui persistent plusieurs jours. Voici les diff\u00e9rents impacts possibles selon la dur\u00e9e&nbsp;:<\/p>\n\n\n\n<ul><li><strong>Moins 48 heures&nbsp;<\/strong><\/li><\/ul>\n\n\n\n<p>Habituellement, il n\u2019y a pas de pertes de rendement.<\/p>\n\n\n\n<ul><li><strong>4 jours<\/strong><\/li><\/ul>\n\n\n\n<p>Les plants peuvent connaitre des retards de croissance, comme \u00eatre plus courts et avoir moins de n\u0153uds. &nbsp;<\/p>\n\n\n\n<ul><li><strong>6 jours&nbsp;<\/strong><\/li><\/ul>\n\n\n\n<p>Il y a un risque de pertes de rendement.<\/p>\n\n\n\n<ul><li><strong>7 jours et plus&nbsp;<\/strong><\/li><\/ul>\n\n\n\n<p>Il y a un risque de pertes consid\u00e9rables, voire totales, des cultures.<\/p>\n\n\n\n<h2>La temp\u00e9rature<\/h2>\n\n\n\n<p>La temp\u00e9rature est un \u00e9l\u00e9ment qui joue un r\u00f4le crucial dans la survie des champs de soya qui ont re\u00e7u trop de pr\u00e9cipitations. Plus elle est \u00e9lev\u00e9e plus elle stimule la respiration des plants et celle des micro-organismes pr\u00e9sents dans le sol. Cela entraine une diminution rapide de l\u2019oxyg\u00e8ne favorisant des niveaux \u00e9lev\u00e9s de CO2, auxquels le soya est particuli\u00e8rement sensible.<\/p>\n\n\n\n<p>Dans le cas contraire, les temp\u00e9ratures fraiches et nuageuses am\u00e9liorent la capacit\u00e9 de survie du soya en raison d\u2019une plus faible d\u00e9pense d\u2019\u00e9nergie et d\u2019oxyg\u00e8ne.<\/p>\n\n\n\n<h2>Capacit\u00e9 de drainage et composition du sol <\/h2>\n\n\n\n<p>Sur une m\u00eame p\u00e9riode d\u2019inondation, les chercheurs mentionnent que les pertes de rendement sont plus importantes dans les champs avec un sol argileux que ceux avec un sol loameux. En effet, au stade V4, les pertes s\u2019\u00e9l\u00e8vent \u00e0 1,8 bu\/ac&nbsp;par jour pour les sols argileux, tandis qu\u2019elles s\u2019\u00e9l\u00e8vent \u00e0 0,8 bu\/ac pour les sols loameux.<\/p>\n\n\n\n<h2>Stades de croissance<\/h2>\n\n\n\n<p>Les effets des inondations sur le soya tendent \u00e0 \u00eatre plus significatifs lorsque le soya est au <a href=\"https:\/\/prograin.ca\/ca\/fr\/2021\/02\/22\/les-differents-stades-de-croissance-du-soya\/\">stade de reproduction<\/a>. Plus on se rapproche du moment des r\u00e9coltes plus les dommages potentiels sont importants. Ces dommages peuvent se manifester par la rupture des tiges, le ph\u00e9nom\u00e8ne de verse, la germination pr\u00e9matur\u00e9e ou la rupture des grains.<\/p>\n\n\n\n<h2>Options de gestion<\/h2>\n\n\n\n<p>\u00c0 la suite des p\u00e9riodes d\u2019inondation, on recommande de faire le bilan de l\u2019\u00e9tat des champs dans les 3 \u00e0 5 jours suivant le retrait de l\u2019eau. Plus pr\u00e9cis\u00e9ment, il convient d\u2019examiner l\u2019\u00e9tat des bourgeons auxiliaires pour voir s\u2019il y a des points de croissance, mais aussi de v\u00e9rifier la densit\u00e9 des plants survivants et la pr\u00e9sence de maladies des semis comme le <em><a href=\"https:\/\/prograin.ca\/ca\/fr\/2023\/08\/03\/senescence-en-cours-de-saison-a-quelle-maladie-a-t-on-affaire\/\">Phytophtora<\/a><\/em>.<\/p>\n\n\n\n<p>Lorsque les peuplements sont pauvres, replanter peut s\u2019av\u00e9rer \u00eatre une bonne option. Toutefois, il est important de garder \u00e0 l\u2019esprit que les plants peuvent aussi rester rabougris et jaunes jusqu\u2019\u00e0 ce que la nodulation s\u2019intensifie. De plus, les conditions peuvent aussi \u00e9voluer rapidement avec plusieurs jours de beau temps.<\/p>\n\n\n\n<p>Et voil\u00e0 ! Maintenant, vous en savez un peu plus sur les impacts des pr\u00e9cipitations sur le rendement du soya. Nous esp\u00e9rons que vous avez appr\u00e9ci\u00e9 la lecture de cet article !<\/p>\n\n\n\n<p class=\"has-small-font-size\"><strong>Sources&nbsp;:<\/strong><\/p>\n\n\n\n<p class=\"has-small-font-size\">University of Minnesota. (2018). <em>Field drying and soil type<\/em>. <a href=\"https:\/\/extension.umn.edu\/growing-soybean\/flooded-soybean#field-drying-and-soil-type-542762\">https:\/\/extension.umn.edu\/growing-soybean\/flooded-soybean#field-drying-and-soil-type-542762<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size\">Informa markets. (2019).<em> Early-season flooding impact on corn and soybeans<\/em><em>. <\/em><a href=\"https:\/\/www.farmprogress.com\/crops\/early-season-flooding-impact-on-corn-and-soybeans\">Early-season flooding impact on corn and soybeans (farmprogress.com)<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size\">RAP. Grandes cultures. (2023). <em>Grandes cultures avertissements No 12<\/em>. <a href=\"https:\/\/www.agrireseau.net\/rap\/documents\/111423\/grandes-cultures-avertissement-no-12-14-juillet-2023\">https:\/\/www.agrireseau.net\/rap\/documents\/111423\/grandes-cultures-avertissement-no-12-14-juillet-2023<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size\">Bohner, H. (2016). <em>Flood damaged soybeans<\/em>. <a href=\"https:\/\/fieldcropnews.com\/2015\/06\/flood-damaged-soybeans\/\">https:\/\/fieldcropnews.com\/2015\/06\/flood-damaged-soybeans\/<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Au printemps et \u00e0 l\u2019automne, il est courant de recevoir des pr\u00e9cipitations qui parfois engendrent une saturation voire une inondation des champs de soya. Les plants sont alors susceptibles de connaitre des retards d\u2019\u00e9mergence, de croissance tout en \u00e9tant plus \u00e0 risque de d\u00e9velopper certaines maladies. Dans cet article, nous explorerons les facteurs qui influencent [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":26166,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":""},"categories":[272],"tags":[],"author_meta":{"display_name":"anouk","author_link":"https:\/\/prograin.ca\/ca\/author\/anouk\/"},"featured_img":"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-300x200.jpg","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.11 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les impacts des pr\u00e9cipitations sur le soya - Prograin - Canada<\/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:\/\/prograin.ca\/ca\/fr\/2024\/04\/30\/les-impacts-des-precipitations-sur-le-soya\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les impacts des pr\u00e9cipitations sur le soya - Prograin - Canada\" \/>\n<meta property=\"og:description\" content=\"Au printemps et \u00e0 l\u2019automne, il est courant de recevoir des pr\u00e9cipitations qui parfois engendrent une saturation voire une inondation des champs de soya. 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Les plants sont alors susceptibles de connaitre des retards d\u2019\u00e9mergence, de croissance tout en \u00e9tant plus \u00e0 risque de d\u00e9velopper certaines maladies. Dans cet article, nous explorerons les facteurs qui influencent les impacts des pr\u00e9cipitations sur le soya, ainsi que les diff\u00e9rentes strat\u00e9gies pour minimiser les dommages ! La dur\u00e9e Les cultures de soya subissent moins de dommages lors d&#8217;inondations de courte dur\u00e9e comparativement \u00e0 celles qui persistent plusieurs jours. Voici les diff\u00e9rents impacts possibles selon&hellip;<\/p>\n","category_list":"<a href=\"https:\/\/prograin.ca\/ca\/fr\/category\/non-classe-fr\/\" rel=\"category tag\">Non class\u00e9<\/a>","author_info":{"name":"anouk","url":"https:\/\/prograin.ca\/ca\/author\/anouk\/"},"comments_num":"0 comments","featured_image_urls_v2":{"full":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre.jpg",1253,835,false],"thumbnail":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-150x150.jpg",150,150,true],"medium":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-300x200.jpg",300,200,true],"medium_large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-768x512.jpg",768,512,true],"large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre.jpg",1253,835,false],"1536x1536":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre.jpg",1253,835,false],"2048x2048":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre.jpg",1253,835,false],"menu-24x24":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-24x16.jpg",24,16,true],"menu-36x36":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-36x24.jpg",36,24,true],"menu-48x48":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2024\/04\/Creation-sans-titre-48x32.jpg",48,32,true]},"post_excerpt_stackable_v2":"<p>Au printemps et \u00e0 l\u2019automne, il est courant de recevoir des pr\u00e9cipitations qui parfois engendrent une saturation voire une inondation des champs de soya. Les plants sont alors susceptibles de connaitre des retards d\u2019\u00e9mergence, de croissance tout en \u00e9tant plus \u00e0 risque de d\u00e9velopper certaines maladies. Dans cet article, nous explorerons les facteurs qui influencent les impacts des pr\u00e9cipitations sur le soya, ainsi que les diff\u00e9rentes strat\u00e9gies pour minimiser les dommages ! La dur\u00e9e Les cultures de soya subissent moins de dommages lors d&#8217;inondations de courte dur\u00e9e comparativement \u00e0 celles qui persistent plusieurs jours. 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