
{"id":24116,"date":"2021-02-22T20:53:57","date_gmt":"2021-02-22T20:53:57","guid":{"rendered":"https:\/\/prograin.ca\/ca\/?p=24116"},"modified":"2025-08-13T15:53:34","modified_gmt":"2025-08-13T15:53:34","slug":"les-differents-stades-de-croissance-du-soya","status":"publish","type":"post","link":"https:\/\/prograin.ca\/ca\/fr\/2021\/02\/22\/les-differents-stades-de-croissance-du-soya\/","title":{"rendered":"Les diff\u00e9rents stades de croissance du soya"},"content":{"rendered":"\n<p>\u00c0 l\u2019approche de la nouvelle saison des semis, on a cru bon d\u00e9poser ici un guide facile sur les stades de croissance du soya. Vous pourrez vous y r\u00e9f\u00e9rer pendant votre culture.<\/p>\n\n\n\n<p>La <strong>germination<\/strong> d\u00e9bute alors que le grain de soya absorbe 50&nbsp;% de son poids en eau. C&#8217;est ce qu&#8217;on appelle l&#8217;imbibition. Par la suite viennent les stades <strong>v\u00e9g\u00e9tatifs<\/strong> (V) puis <strong>reproductifs<\/strong> (R).&nbsp;<\/p>\n\n\n\n<p><strong>VE Lev\u00e9e<\/strong><\/p>\n\n\n\n<p>Apparition des cotyl\u00e9dons \u00e0 la surface du sol.<\/p>\n\n\n\n<p><strong>VC Premi\u00e8res feuilles unifoli\u00e9es d\u00e9roul\u00e9es<\/strong>&nbsp;<\/p>\n\n\n\n<p>Les deux premi\u00e8res feuilles sont unifoli\u00e9es et oppos\u00e9es sur la tige. Elles sont compt\u00e9es comme le premier n\u0153ud foliaire.<\/p>\n\n\n\n<p><strong>V1 Premi\u00e8res feuilles trifoli\u00e9es d\u00e9roul\u00e9es<\/strong><\/p>\n\n\n\n<p>Des nodules racinaires fixateurs d&#8217;azote commencent \u00e0 se former sur les racines. \u00c0 cette \u00e9tape, il importe d\u2019\u00e9valuer la population pour d\u00e9terminer si un resemis est n\u00e9cessaire. Vous devez le faire visuellement, mais aussi de fa\u00e7on concr\u00e8te pour un bon diagnostic. Sortez votre pelle pour trouver les plantules !<\/p>\n\n\n\n<p><strong>V2-V3 Deuxi\u00e8me et troisi\u00e8me feuilles trifoli\u00e9es d\u00e9roul\u00e9es<\/strong><\/p>\n\n\n\n<p>La fixation active de l&#8217;azote par les nodules pr\u00e9sents sur les racines a probablement d\u00e9but\u00e9. La couleur ros\u00e9e \u00e0 l\u2019int\u00e9rieur d\u2019un nodule coup\u00e9 en deux est signe de sa bonne sant\u00e9 et de son activit\u00e9 fixatrice. D\u00e9terrez des plants \u00e0 l\u2019aide d\u2019une pelle pour valider la nodulation active.<\/p>\n\n\n\n<p><strong>V4-V5 Quatri\u00e8me et cinqui\u00e8me feuilles trifoli\u00e9es d\u00e9roul\u00e9es<\/strong><\/p>\n\n\n\n<p>Les boutons floraux commencent \u00e0 se d\u00e9velopper entre V4-V6. Les plants peuvent se remettre d&#8217;une d\u00e9foliation \u00e0 100&nbsp;% \u00e0 ce stade avec un risque minimal de perte de rendement.&nbsp;<\/p>\n\n\n\n<p><strong>R1 D\u00e9but de la floraison<\/strong><\/p>\n\n\n\n<p>Pr\u00e9sence d\u2019au moins une fleur \u00e9panouie (mauve ou blanche) sur les 3<sup>e<\/sup> au 6<sup>e<\/sup> n\u0153ud de la tige principale.&nbsp;<\/p>\n\n\n\n<p><strong>R2 Pleine floraison<\/strong><\/p>\n\n\n\n<p>Pr\u00e9sence d\u2019une fleur \u00e9panouie \u00e0 l\u2019un des deux n\u0153uds sup\u00e9rieurs de la tige principale. La floraison se poursuivra pendant 3 \u00e0 5 semaines. 20 \u00e0 80&nbsp;% des fleurs produites avorteront.<\/p>\n\n\n\n<p><strong>R3 Premi\u00e8res gousses<\/strong><\/p>\n\n\n\n<p>Pr\u00e9sence de gousses d\u2019environ 6 mm de long (1\/4&nbsp;\u2018\u2019) \u00e0 l\u2019un des quatre n\u0153uds sup\u00e9rieurs de la tige principale. Les taux d&#8217;absorption de potassium culminent peu apr\u00e8s R2.&nbsp;<\/p>\n\n\n\n<p><strong>R4 Remplissage des gousses<\/strong><\/p>\n\n\n\n<p>Pr\u00e9sence de gousses d\u2019environ 20 mm de long (3\/4\u2019\u2019) \u00e0 l\u2019un des quatre n\u0153uds sup\u00e9rieurs de la tige principale. Les grains commencent \u00e0 se d\u00e9velopper et la floraison continue. Les pics d&#8217;absorption d&#8217;azote se produisent entre R4-R5.&nbsp;<\/p>\n\n\n\n<p><strong>R5 Premiers grains<\/strong><\/p>\n\n\n\n<p>Pr\u00e9sence de grains d\u2019environ 3 mm de long (1\/8\u2019\u2019) dans une gousse \u00e0 l\u2019un des quatre n\u0153uds sup\u00e9rieurs de la tige principale. Le remplissage rapide des grains commence, tandis que la croissance des racines ralentit.&nbsp;<\/p>\n\n\n\n<p><strong>R6 Grossissement des grains<\/strong><\/p>\n\n\n\n<p>Des grains verts remplissent la cavit\u00e9 d\u2019une gousse \u00e0 l\u2019un des quatre n\u0153uds sup\u00e9rieurs de la tige principale. De grandes quantit\u00e9s d&#8217;azote sont encore accumul\u00e9es dans le sol et remobilis\u00e9es vers les grains de soya.&nbsp;<\/p>\n\n\n\n<p><strong>R7 D\u00e9but \u2013 p\u00e9riode de maturit\u00e9<\/strong><\/p>\n\n\n\n<p>La plupart des gousses sont jaunes et au moins une gousse de la tige principale atteint sa couleur \u00e0 maturit\u00e9 (brun roux). Les grains au stade de croissance R7 sont \u00e0 environ 60&nbsp;% d&#8217;humidit\u00e9.&nbsp;<\/p>\n\n\n\n<p><strong>R8 Pleine maturit\u00e9<\/strong><\/p>\n\n\n\n<p>95&nbsp;% des gousses ont atteint leur couleur \u00e0 maturit\u00e9 (brun-roux). 5 \u00e0 10 jours de temps de s\u00e9chage sont g\u00e9n\u00e9ralement n\u00e9cessaires apr\u00e8s R8 pour que l&#8217;humidit\u00e9 du soya soit inf\u00e9rieure \u00e0 15&nbsp;%.&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/www.agrireseau.net\/grandescultures\/documents\/96058\/guide-sur-les-stades-de-croissance-du-soya\">\u00c0 titre de r\u00e9f\u00e9rences visuelles, nous vous invitons \u00e0 consulter ce tableau propos\u00e9 par Agri-R\u00e9seau.<\/a>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c0 l\u2019approche de la nouvelle saison des semis, on a cru bon d\u00e9poser ici un guide facile sur les stades de croissance du soya. Vous pourrez vous y r\u00e9f\u00e9rer pendant votre culture. La germination d\u00e9bute alors que le grain de soya absorbe 50&nbsp;% de son poids en eau. C&#8217;est ce qu&#8217;on appelle l&#8217;imbibition. Par la [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":24115,"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":"devmxo","author_link":"https:\/\/prograin.ca\/ca\/author\/devmxo\/"},"featured_img":"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-300x200.jpg","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.11 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les diff\u00e9rents stades de croissance du 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\/2021\/02\/22\/les-differents-stades-de-croissance-du-soya\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les diff\u00e9rents stades de croissance du soya - Prograin - Canada\" \/>\n<meta property=\"og:description\" content=\"\u00c0 l\u2019approche de la nouvelle saison des semis, on a cru bon d\u00e9poser ici un guide facile sur les stades de croissance du soya. Vous pourrez vous y r\u00e9f\u00e9rer pendant votre culture. La germination d\u00e9bute alors que le grain de soya absorbe 50&nbsp;% de son poids en eau. C&#8217;est ce qu&#8217;on appelle l&#8217;imbibition. 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Vous pourrez vous y r\u00e9f\u00e9rer pendant votre culture. La germination d\u00e9bute alors que le grain de soya absorbe 50&nbsp;% de son poids en eau. C&#8217;est ce qu&#8217;on appelle l&#8217;imbibition. Par la suite viennent les stades v\u00e9g\u00e9tatifs (V) puis reproductifs (R).&nbsp; VE Lev\u00e9e Apparition des cotyl\u00e9dons \u00e0 la surface du sol. VC Premi\u00e8res feuilles unifoli\u00e9es d\u00e9roul\u00e9es&nbsp; Les deux premi\u00e8res feuilles sont unifoli\u00e9es et oppos\u00e9es sur la tige. Elles sont compt\u00e9es comme le premier n\u0153ud foliaire. V1 Premi\u00e8res&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":"devmxo","url":"https:\/\/prograin.ca\/ca\/author\/devmxo\/"},"comments_num":"0 comments","featured_image_urls_v2":{"full":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya.jpg",1728,1152,false],"thumbnail":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-150x150.jpg",150,150,true],"medium":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-300x200.jpg",300,200,true],"medium_large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-768x512.jpg",768,512,true],"large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya.jpg",1728,1152,false],"1536x1536":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-1536x1024.jpg",1536,1024,true],"2048x2048":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya.jpg",1728,1152,false],"menu-24x24":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-24x16.jpg",24,16,true],"menu-36x36":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-36x24.jpg",36,24,true],"menu-48x48":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2021\/02\/Les-differents-stades-du-soya-48x32.jpg",48,32,true]},"post_excerpt_stackable_v2":"<p>\u00c0 l\u2019approche de la nouvelle saison des semis, on a cru bon d\u00e9poser ici un guide facile sur les stades de croissance du soya. Vous pourrez vous y r\u00e9f\u00e9rer pendant votre culture. La germination d\u00e9bute alors que le grain de soya absorbe 50&nbsp;% de son poids en eau. C&#8217;est ce qu&#8217;on appelle l&#8217;imbibition. Par la suite viennent les stades v\u00e9g\u00e9tatifs (V) puis reproductifs (R).&nbsp; VE Lev\u00e9e Apparition des cotyl\u00e9dons \u00e0 la surface du sol. VC Premi\u00e8res feuilles unifoli\u00e9es d\u00e9roul\u00e9es&nbsp; Les deux premi\u00e8res feuilles sont unifoli\u00e9es et oppos\u00e9es sur la tige. Elles sont compt\u00e9es comme le premier n\u0153ud foliaire. V1 Premi\u00e8res&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/prograin.ca\/ca\/fr\/category\/non-classe-fr\/\" rel=\"category tag\">Non class\u00e9<\/a>","author_info_v2":{"name":"devmxo","url":"https:\/\/prograin.ca\/ca\/author\/devmxo\/"},"comments_num_v2":"0 comments","coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"https:\/\/prograin.ca\/ca\/fr\/category\/non-classe-fr\/\" class=\"advgb-post-tax-term\">Non class\u00e9<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Non class\u00e9<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Posted 5 ann\u00e9es ago","modified":"Updated 8 mois ago"},"absolute_dates":{"created":"Posted on 22 f\u00e9vrier 2021","modified":"Updated on 13 ao\u00fbt 2025"},"absolute_dates_time":{"created":"Posted on 22 f\u00e9vrier 2021 20 h 53 min","modified":"Updated on 13 ao\u00fbt 2025 15 h 53 min"},"featured_img_caption":"","series_order":"","_links":{"self":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts\/24116"}],"collection":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/comments?post=24116"}],"version-history":[{"count":17,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts\/24116\/revisions"}],"predecessor-version":[{"id":27704,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts\/24116\/revisions\/27704"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/media\/24115"}],"wp:attachment":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/media?parent=24116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/categories?post=24116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/tags?post=24116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}