{"id":1217,"date":"2023-04-25T16:24:00","date_gmt":"2023-04-25T14:24:00","guid":{"rendered":"https:\/\/www.elicit-plant.com\/?p=1217"},"modified":"2024-10-02T09:38:53","modified_gmt":"2024-10-02T07:38:53","slug":"comment-adapter-la-culture-de-mais-au-stress-hydrique","status":"publish","type":"post","link":"https:\/\/www.elicit-plant.com\/fr\/blog\/stress-hydrique\/comment-adapter-la-culture-de-mais-au-stress-hydrique\/","title":{"rendered":"Comment adapter la culture de ma\u00efs au stress hydrique ?"},"content":{"rendered":"<section class=\"cbo-picture picture--contained\">\n\t<div class=\"picture-inner cbo-container container--small\">\n\t\t<div class=\"picture-element cbo-picture-cover\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/a605f0cb-0-comment-adapter-la-culture-de-mais-au-stress-hydrique-1000x562-1.jpg\" srcset=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/a605f0cb-0-comment-adapter-la-culture-de-mais-au-stress-hydrique-1000x562-1-320x180.jpg 320w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/a605f0cb-0-comment-adapter-la-culture-de-mais-au-stress-hydrique-1000x562-1-768x432.jpg 840w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/a605f0cb-0-comment-adapter-la-culture-de-mais-au-stress-hydrique-1000x562-1.jpg 1024w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/a605f0cb-0-comment-adapter-la-culture-de-mais-au-stress-hydrique-1000x562-1.jpg 1400w\" class=\"\" alt=\"echelle niveau niveau d&#039;eau\" width=\"1000\" height=\"562\" sizes=\"auto, 100vw\" loading=\"lazy\" \/>\t\t<\/div>\n\n\t\t\t<\/div>\n<\/section>\n\n<section class=\"cbo-text cbo-margin-container\">\n    <div class=\"\n        text-inner\n                cbo-container\n        container--small        \"\n    >\n        <div class=\"text-content cbo-cms cms--large\">\n            <p>En France, l\u2019hiver 2022-2023 a battu des records en mati\u00e8re de m\u00e9t\u00e9o. De douceur tout d\u2019abord, avec des temp\u00e9ratures moyennes sup\u00e9rieures de 0,8\u2009\u00b0C par rapport aux normales de la p\u00e9riode 1991-2020. Mais, c\u2019est surtout le manque d\u2019eau qui reste pr\u00e9occupant en ce d\u00e9but d\u2019ann\u00e9e\u2026 Cet hiver, le niveau des pr\u00e9cipitations, pluies et neige, a \u00e9t\u00e9 d\u00e9ficitaire d\u2019environ 25 % en moyenne sur le pays, un d\u00e9ficit qui a m\u00eame atteint 75 % en f\u00e9vrier. La France a, d\u2019ailleurs, entre le 21 janvier et le 21 f\u00e9vrier, enregistr\u00e9 32 jours cons\u00e9cutifs sans une goutte de pluie : un record, toutes saisons confondues. Cette absence de pr\u00e9cipitations significative a aggrav\u00e9 le niveau d\u2019ass\u00e8chement des sols apr\u00e8s un \u00e9t\u00e9 2022 d\u00e9j\u00e0 marqu\u00e9 par la s\u00e9cheresse.<\/p>\n<h2 class=\"wp-block-heading\">Le d\u00e9r\u00e8glement climatique s\u2019intensifie en France<\/h2>\n<p>Cette situation de s\u00e9cheresse exceptionnelle n\u2019a pas permis aux nappes phr\u00e9atiques d\u2019atteindre des niveaux de recharge corrects. Ainsi, au 1<sup>er<\/sup>\u00a0mars, le BRGM (Bureau des recherches g\u00e9ologiques et mini\u00e8res), \u00e0 propos de l\u2019\u00e9tat des nappes en France, indiquait que 80 % d\u2019entre elles affichaient des niveaux mod\u00e9r\u00e9ment bas \u00e0 tr\u00e8s bas. De cette situation d\u00e9coulent de grandes incertitudes pour les possibilit\u00e9s d\u2019irrigation des cultures pour les mois \u00e0 venir.<\/p>\n<p>Les pluies ont heureusement fait leur retour au mois de mars dans la plupart des r\u00e9gions pour assurer la recharge en eau des sols en surface, ce qui devrait assurer de bonnes conditions d\u2019implantation aux cultures de printemps. La reprise de la v\u00e9g\u00e9tation absorbera, en revanche, probablement en partie, cette eau. D\u2019o\u00f9 une inqui\u00e9tude quant au risque li\u00e9 \u00e0 la s\u00e9cheresse sur la croissance des cultures de printemps. Quoi qu\u2019il en soit, l\u2019intensification du d\u00e9r\u00e8glement climatique et les al\u00e9as m\u00e9t\u00e9o qu\u2019il engendre imposent aux agriculteurs de faire \u00e9voluer leurs pratiques pour pr\u00e9server la culture.<\/p>\n<p>&nbsp;<\/p>\n<h2 class=\"wp-block-heading\">Adapter la conduite culturale<\/h2>\n<p>En r\u00e9action au stress hydrique, les ma\u00efs enroulent leurs feuilles pour limiter la photosynth\u00e8se avec, comme incidence, un impact sur le rendement final. Pour cette culture, le stade de sensibilit\u00e9 maximale \u00e0 la s\u00e9cheresse se situe entre 10 jours avant la floraison et trois semaines apr\u00e8s. Tout l\u2019enjeu est donc de mettre en place des strat\u00e9gies d\u2019\u00e9vitement pour pr\u00e9server la rentabilit\u00e9 de la culture. Ainsi, face \u00e0 ces al\u00e9as m\u00e9t\u00e9o \u00e0 r\u00e9p\u00e9tition, les agriculteurs multiplient les leviers d\u2019action pour contourner, en particulier, le d\u00e9ficit de pluie. Le choix de vari\u00e9t\u00e9s moins sensibles \u00e0 la s\u00e9cheresse constitue le premier. Des semis pr\u00e9coces, quand les conditions m\u00e9t\u00e9o le permettent, concourent \u00e9galement \u00e0 mieux appr\u00e9hender les p\u00e9riodes estivales les plus chaudes, en pleine floraison du ma\u00efs, stade tr\u00e8s sensible. Bien \u00e9videmment, la gestion de la ressource en eau, quand l\u2019agriculteur dispose d\u2019irrigation, permet aussi, via des outils de pilotage, d\u2019apporter le bon niveau au moment le plus opportun.<\/p>\n<p>&nbsp;<\/p>\n<h2 class=\"wp-block-heading\">Pr\u00e9parer les plantes \u00e0 l\u2019arriv\u00e9e d\u2019un stress hydrique<\/h2>\n<p>Autre option mise \u00e0 disposition des ma\u00efsiculteurs, une nouvelle g\u00e9n\u00e9ration de\u00a0<strong>biosolutions<\/strong>\u00a0qui ouvre des perspectives en agriculture pour\u00a0<strong>lutter contre le stress hydrique<\/strong>, \u00e0 l\u2019image du BEST-a, compos\u00e9 de phytost\u00e9rols. Cette biosolution aide la culture \u00e0 limiter les p\u00e9riodes de stress d\u00fb \u00e0 un d\u00e9ficit en eau. En effet, les phytost\u00e9rols g\u00e9n\u00e8rent au sein de la plante des r\u00e9actions m\u00e9taboliques de r\u00e9sistance et d\u00e9clenchent une diminution de sa consommation d\u2019eau et le d\u00e9veloppement de ses racines. Ainsi par\u00e9e, la plante acc\u00e8de \u00e0 une r\u00e9serve en eau plus grande, ce qui pr\u00e9serve les ressources sur une p\u00e9riode plus longue. Cela retarde la p\u00e9riode o\u00f9 le ma\u00efs peut manquer d\u2019eau et subir un stress hydrique.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><strong>En vid\u00e9o : D\u00e9couvrez le mode d\u2019action des phytost\u00e9rols sur le stress hydrique des plantes<\/strong><\/p>\n\n            <div style=\"clear: both;\"><\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n<section class=\"cbo-video video--normal video--titlebefore cbo-margin-container\">\n\t<div class=\"video-inner cbo-container container--small\">\n\n\t\t\t\t<h2 class=\"video-title\">\n\t\t\tBEST-a : Mode d&rsquo;action des phytost\u00e9rols sur le stress hydrique des plantes\t\t<\/h2>\n\t\t\n\t\t<div class=\"video-player\" data-player-ancestor>\n\n\t\t\t<div class=\"player-inner\">\n\t\t\t\t<div class=\"cbo-youtube\">\n\t<div class=\"youtube-inner\">\n\n\t\t\t\t<div\n\t\t\tclass=\"youtube-player\"\n\t\t\tdata-id=\"Nqv3PQomtUo\"\n\t\t\tid=\"yt_OTNuVopKrL\"\n\t\t><\/div>\n\t\t\n\t\t<div class=\"youtube-cover cbo-picture-cover\">\n\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/maxresdefault-2-1-1024x576.jpg\"  sizes=\"100vw\" class=\"\" alt=\"\"  loading=\"lazy\" \/>\n\t\t\t<button type=\"button\" class=\"cover-button cbo-youtube-button\">\n\t\t\t\t<i class=\"icon icon-play\"><\/i>\n\t\t\t\t<div class=\"button-spinner cbo-spinner\">\n\t\t\t\t\t<div><\/div>\n\t\t\t\t\t<div><\/div>\n\t\t\t\t\t<div><\/div>\n\t\t\t\t\t<div><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/button>\n\t\t<\/div>\n\n\t<\/div>\n\n\t<\/div>\t\t\t<\/div>\n\n\t\t\t\n\t\t<\/div>\n\t<\/div>\n<\/section>\n\n\n<section class=\"cbo-text cbo-margin-container\">\n    <div class=\"\n        text-inner\n                cbo-container\n        container--small        \"\n    >\n        <div class=\"text-content cbo-cms cms--large\">\n            <p><strong>Bon \u00e0 savoir :<br \/>\n<\/strong>Le ma\u00efs est une culture qui a besoin d\u2019une quantit\u00e9 suffisante d\u2019eau pour se d\u00e9velopper correctement. Les nappes phr\u00e9atiques peuvent \u00eatre une source d\u2019eau importante pour l\u2019irrigation des cultures, en particulier dans les r\u00e9gions o\u00f9 les pr\u00e9cipitations sont insuffisantes ou irr\u00e9guli\u00e8res. L\u2019\u00e9tat des nappes phr\u00e9atiques peut varier en fonction de plusieurs facteurs, tels que les pr\u00e9cipitations, la qualit\u00e9 des sols et les pratiques d\u2019utilisation des terres. Si les niveaux des nappes phr\u00e9atiques sont bas, cela peut entra\u00eener un d\u00e9ficit d\u2019eau pour l\u2019irrigation des cultures et affecter la production du ma\u00efs. Il est donc important de surveiller les rapports du BRGM sur l\u2019\u00e9tat des nappes phr\u00e9atiques. Il convient aussi de combiner les diff\u00e9rents leviers disponibles en agriculture pour une gestion responsable de la ressource en eau et la pr\u00e9vention de la s\u00e9cheresse en cultures.<\/p>\n\n            <div style=\"clear: both;\"><\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n<section class=\"cbo-text cbo-margin-container\">\n    <div class=\"\n        text-inner\n                cbo-container\n        container--small        \"\n    >\n        <div class=\"text-content cbo-cms cms--large\">\n            <h2><strong>Int\u00e9ress\u00e9 par le Best-a ?<\/strong><\/h2>\n<div class=\"hs-cta-embed hs-cta-simple-placeholder hs-cta-embed-116449368823\" style=\"max-width: 100%; max-height: 100%; width: 350px; height: 435.40625px;\" data-hubspot-wrapper-cta-id=\"116449368823\"><a href=\"https:\/\/cta-eu1.hubspot.com\/web-interactives\/public\/v1\/track\/redirect?encryptedPayload=AVxigLIQ3T3H6ISih3xFgQd%2BBJnwcmc0WUNYpyRhFVK9Xnv9s%2BgE44yFBQ2e%2FJCPOrJYyrp4%2FTGeAtPEPkn%2FRczpOLNrqmAyXTg8Stkqucd3a25yzPd%2F4PVDM0G%2BKBq6zbATZWOLgrucmXfh2RHBk%2FWaoTPcWBrvutj7hAOwy0IpQoPmAlDYDr4av0AsDY5dlT6fHFrzyHGEZS9UW7HC43qUGKMRDLZF2%2Bh8x4PYX6RKuuJoqrUnQEfzZbHd4aX%2FovupSBCwng%3D%3D&amp;webInteractiveContentId=116449368823&amp;portalId=143801506\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" style=\"height: 100%; width: 100%; object-fit: fill;\" src=\"https:\/\/hubspot-no-cache-eu1-prod.s3.amazonaws.com\/cta\/default\/143801506\/interactive-116449368823.png\" alt=\"Best-a-EliZea-Bayer-1\" \/><br \/>\n<\/a><\/div>\n\n            <div style=\"clear: both;\"><\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n<section class=\"cbo-featuredlinks featuredlinks--colorwhite\">\n\t<div class=\"featuredlinks-inner cbo-container \">\n\n\t\t\t\t\t<h2 class=\"cbo-title-2 featuredlinks-title\">\n\t\t\t\tNos autres articles autour du stress hydrique\t\t\t<\/h2>\n\t\t\n\t\t<div class=\"featuredlinks-list\" data-anim-group data-group-delay=\"100\">\n\t\t\t\n\t\t\t<div class=\"list-el\">\n\t\t\t\t<a class=\"el-inner\" href=\"https:\/\/www.elicit-plant.com\/fr\/blog\/stress-hydrique\/elicit-plant-est-en-phase-avec-le-plan-eau-du-gouvernement\/\">\n\n\t\t\t\t\t<figure class=\"inner-picture cbo-picture-cover\">\n\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/elicit-plant-est-en-phase-avec-le-plan-eau-du-gouvernement-768x432.webp\" srcset=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/elicit-plant-est-en-phase-avec-le-plan-eau-du-gouvernement-320x180.webp 320w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/elicit-plant-est-en-phase-avec-le-plan-eau-du-gouvernement-768x432.webp 840w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/elicit-plant-est-en-phase-avec-le-plan-eau-du-gouvernement-768x432.webp 1024w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/elicit-plant-est-en-phase-avec-le-plan-eau-du-gouvernement-768x432.webp 1400w\" class=\"\" alt=\"Elicit Plant est en phase avec le plan eau du Gouvernement\" width=\"768\" height=\"432\" sizes=\"auto, 100vw\" loading=\"lazy\" \/>\t\t\t\t\t<\/figure>\n\n\t\t\t\t\t<h3 class=\"inner-title cbo-title-3\">\n\t\t\t\t\t\tElicit Plant est en phase avec le plan eau du Gouvernement\t\t\t\t\t<\/h3>\n\n\t\t\t\t\t<span class=\"inner-button cbo-buttonmore\">\n\t\t\t\t\t\t<i class=\"icon icon-cross\"><\/i>\n\t\t\t\t\t<\/span>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\n\t\t\t\n\t\t\t<div class=\"list-el\">\n\t\t\t\t<a class=\"el-inner\" href=\"https:\/\/www.elicit-plant.com\/fr\/blog\/stress-hydrique\/contre-le-stress-hydrique-du-mais-vantez-les-merites-du-preventif\/\">\n\n\t\t\t\t\t<figure class=\"inner-picture cbo-picture-cover\">\n\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/fiches_agir_en_preventif_contre_le_stress_hydrique_du_mais-1000x562-1-768x432.jpg\" srcset=\"https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/fiches_agir_en_preventif_contre_le_stress_hydrique_du_mais-1000x562-1-320x180.jpg 320w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/fiches_agir_en_preventif_contre_le_stress_hydrique_du_mais-1000x562-1-768x432.jpg 840w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/fiches_agir_en_preventif_contre_le_stress_hydrique_du_mais-1000x562-1-768x432.jpg 1024w, https:\/\/www.elicit-plant.com\/app\/uploads\/sites\/1\/2023\/07\/fiches_agir_en_preventif_contre_le_stress_hydrique_du_mais-1000x562-1-768x432.jpg 1400w\" class=\"\" alt=\"Contre le stress hydrique du ma\u00efs, vantez les m\u00e9rites du pr\u00e9ventif !\" width=\"768\" height=\"432\" sizes=\"auto, 100vw\" loading=\"lazy\" \/>\t\t\t\t\t<\/figure>\n\n\t\t\t\t\t<h3 class=\"inner-title cbo-title-3\">\n\t\t\t\t\t\tContre le stress hydrique du ma\u00efs, vantez les m\u00e9rites du pr\u00e9ventif !\t\t\t\t\t<\/h3>\n\n\t\t\t\t\t<span class=\"inner-button cbo-buttonmore\">\n\t\t\t\t\t\t<i class=\"icon icon-cross\"><\/i>\n\t\t\t\t\t<\/span>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\n\t\t\t\t\t<\/div>\n\n\t<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s une m\u00e9t\u00e9o hivernale marqu\u00e9e par l\u2019absence de pluies en France, les sols sont en situation de s\u00e9cheresse et le BRGM alerte sur des niveaux de recharge des nappes insuffisants. Une situation qui inqui\u00e8te les agriculteurs cultivant du ma\u00efs. Pour \u00e9viter ou contourner le stress li\u00e9 au d\u00e9ficit d\u2019eau en culture, diff\u00e9rents leviers d\u2019action existent. Parmi eux, le recours \u00e0 des biosolutions.<\/p>\n","protected":false},"author":3,"featured_media":1220,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"class_list":["post-1217","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stress-hydrique"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Comment adapter la culture de ma\u00efs au stress hydrique ? - Elicit Plant France<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s une m\u00e9t\u00e9o hivernale marqu\u00e9e par l\u2019absence de pluies en France, les sols sont en situation de s\u00e9cheresse et le BRGM alerte sur des niveaux de recharge des nappes insuffisants.\" \/>\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.elicit-plant.com\/fr\/blog\/stress-hydrique\/comment-adapter-la-culture-de-mais-au-stress-hydrique\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment adapter la culture de ma\u00efs au stress hydrique ? 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