{"id":12792,"date":"2026-08-28T13:28:06","date_gmt":"2026-08-28T11:28:06","guid":{"rendered":"https:\/\/tethys.farm\/?p=12792"},"modified":"2026-08-28T13:28:09","modified_gmt":"2026-08-28T11:28:09","slug":"gestion-de-leau-en-agriculture-en-cas-de-secheresse-due-a-la-chaleur","status":"publish","type":"post","link":"https:\/\/tethys.farm\/fr\/gestion-de-leau-en-agriculture-en-cas-de-secheresse-due-a-la-chaleur\/","title":{"rendered":"Chaleur et s\u00e9cheresse en agriculture : g\u00e9rer l&#039;eau au-del\u00e0 de l&#039;urgence"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"12792\" class=\"elementor elementor-12792\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7dd5430e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7dd5430e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3a718e95\" data-id=\"3a718e95\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-353ef5b3 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"353ef5b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L\u2019\u00e9t\u00e9 2026 ram\u00e8ne avec force au centre de l\u2019attention un th\u00e8me d\u00e9sormais structurel pour l\u2019agriculture\u00a0: <strong>gestion des cultures en conditions de temp\u00e9ratures \u00e9lev\u00e9es<\/strong>, des pr\u00e9cipitations irr\u00e9guli\u00e8res et une disponibilit\u00e9 en eau de plus en plus rare.<\/p><h2>\u00c9t\u00e9 2026\u00a0: La chaleur et la s\u00e9cheresse mettront l\u2019agriculture \u00e0 rude \u00e9preuve.<\/h2><p>LE <a href=\"https:\/\/climate.copernicus.eu\/surface-air-temperature-june-2026\">donn\u00e9es disponibles pour juin<\/a>\u00a0et le mois de juillet offrent un tableau particuli\u00e8rement significatif. Selon le service Copernicus sur les changements climatiques, <strong>Juin 2026<\/strong> Il s&#039;agissait du deuxi\u00e8me mois de juin le plus chaud jamais enregistr\u00e9 en Europe depuis 1979 et <strong>la plus forte chaleur jamais enregistr\u00e9e en Europe occidentale<\/strong>. Dans cette r\u00e9gion, la temp\u00e9rature moyenne a atteint 20,7 \u00b0C, soit une anomalie de +3,1 \u00b0C par rapport \u00e0 la moyenne 1991-2020. En Italie, comme dans une grande partie de l&#039;Europe occidentale continentale, le mois a \u00e9t\u00e9 caract\u00e9ris\u00e9 par des conditions plus s\u00e8ches que la moyenne.<\/p><p>\u00c0 <a href=\"https:\/\/climate.copernicus.eu\/precipitation-relative-humidity-soil-moisture-and-river-flow-july-2026\">Juillet<\/a> Le temps chaud s&#039;est maintenu dans une grande partie de l&#039;Europe occidentale. Sur les mois de juin et juillet, la temp\u00e9rature moyenne a atteint 21,6 \u00b0C, soit 2,8 \u00b0C de plus que la moyenne 1991-2020, la valeur la plus \u00e9lev\u00e9e enregistr\u00e9e pour cette p\u00e9riode de deux mois depuis 1979. Durant cette m\u00eame p\u00e9riode, la s\u00e9cheresse d\u00e9j\u00e0 pr\u00e9sente dans plusieurs r\u00e9gions a persist\u00e9, voire s&#039;est aggrav\u00e9e\u00a0: en juillet, une grande partie de l&#039;Europe occidentale et une grande partie de l&#039;Europe centrale ont connu des conditions plus s\u00e8ches que la moyenne et, dans certaines r\u00e9gions, des niveaux d&#039;humidit\u00e9 du sol en surface exceptionnellement bas.<\/p><p>Il est important de souligner qu&#039;au moment de la r\u00e9daction de ce document, le mois d&#039;ao\u00fbt n&#039;est pas encore termin\u00e9 et qu&#039;un bilan climatique d\u00e9finitif pour l&#039;ensemble de l&#039;\u00e9t\u00e9 2026 n&#039;est donc pas disponible. Cependant, les donn\u00e9es consolid\u00e9es de juin et juillet suffisent \u00e0 mettre en \u00e9vidence certains points. <strong>une condition \u00e0 laquelle l&#039;agriculture doit faire face de plus en plus fr\u00e9quemment<\/strong>.<\/p><h2>S\u00e9cheresse en agriculture : de la gestion des urgences \u00e0 la planification<\/h2><p>En agriculture, la s\u00e9cheresse, \u00e0 l&#039;instar des vagues de chaleur, ne peut plus \u00eatre consid\u00e9r\u00e9e comme une simple urgence saisonni\u00e8re. Les temp\u00e9ratures \u00e9lev\u00e9es et l&#039;irr\u00e9gularit\u00e9 des pr\u00e9cipitations influent directement sur les besoins en eau des cultures et compliquent la d\u00e9termination du moment et de la quantit\u00e9 d&#039;eau \u00e0 irriguer.<\/p><p>La question devient alors <strong>gestion<\/strong>N\u2019attendez pas que le stress soit \u00e9vident, mais ayez les informations n\u00e9cessaires pour intervenir plus t\u00f4t.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-df811b6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"df811b6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ec7b1c3\" data-id=\"ec7b1c3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-95185b2 elementor-widget elementor-widget-image\" data-id=\"95185b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"512\" src=\"https:\/\/tethys.farm\/wp-content\/uploads\/xstore\/xstore-placeholder-768x768.png\" class=\"attachment-medium_large size-medium_large wp-image-12798 lazyload lazyload-simple et-lazyload-fadeIn\" alt=\"\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" data-src=\"https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-768x512.jpg\" data-srcset=\"https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-768x512.jpg 768w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-300x200.jpg 300w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-1024x683.jpg 1024w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-1536x1024.jpg 1536w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-2048x1365.jpg 2048w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-18x12.jpg 18w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-1x1.jpg 1w, https:\/\/tethys.farm\/wp-content\/uploads\/2026\/08\/campi-coltivati-10x7.jpg 10w\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89022fb elementor-widget elementor-widget-text-editor\" data-id=\"89022fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Que deviennent les cultures pendant les vagues de chaleur ?<\/h2><p>Lorsque les temp\u00e9ratures restent \u00e9lev\u00e9es pendant des p\u00e9riodes prolong\u00e9es, <strong>augmente la demande d&#039;\u00e9vaporation<\/strong> de l&#039;atmosph\u00e8re et, par cons\u00e9quent, de la quantit\u00e9 d&#039;eau perdue par le syst\u00e8me sol-plante par \u00e9vapotranspiration.<\/p><p>Si le <strong>disponibilit\u00e9 de l&#039;eau<\/strong> L&#039;apport en nutriments du sol \u00e9tant insuffisant pour compenser ces pertes, la plante met en \u0153uvre une s\u00e9rie de m\u00e9canismes de d\u00e9fense. Parmi ceux-ci figure\u2026 <strong>fermeture des stomates<\/strong>, ce qui limite la transpiration et donc la perte d&#039;eau.<br \/>Cette r\u00e9action permet \u00e0 la plante de se prot\u00e9ger de la d\u00e9shydratation, mais implique \u00e9galement une <strong>r\u00e9duction des \u00e9changes gazeux et de l&#039;activit\u00e9 photosynth\u00e9tique<\/strong>. Si la situation perdure, les effets peuvent affecter le d\u00e9veloppement v\u00e9g\u00e9tatif, l&#039;accumulation de biomasse et, selon la culture et le stade ph\u00e9nologique, la quantit\u00e9 et la qualit\u00e9 de la production.<\/p><p>Le <strong>relation entre la disponibilit\u00e9 de chaleur et d&#039;eau<\/strong> Ceci est particuli\u00e8rement important. Copernic souligne que les temp\u00e9ratures \u00e9lev\u00e9es augmentent la perte d&#039;eau du sol et de la v\u00e9g\u00e9tation par \u00e9vapotranspiration\u00a0; \u00e0 mesure que l&#039;humidit\u00e9 du sol diminue progressivement, le refroidissement par \u00e9vaporation diminue \u00e9galement, contribuant ainsi \u00e0 l&#039;augmentation des temp\u00e9ratures.<\/p><p>Dans ces conditions, donc, <strong>Augmenter sans discernement les volumes d&#039;irrigation n&#039;est pas n\u00e9cessairement la r\u00e9ponse la plus efficace.<\/strong>. Il devient alors essentiel de conna\u00eetre l&#039;\u00e9tat de la culture et le bilan hydrique afin de d\u00e9terminer les p\u00e9riodes et les quantit\u00e9s d&#039;irrigation en fonction des besoins r\u00e9els.<\/p><h2>Pourquoi les mod\u00e8les d&#039;irrigation traditionnels montrent leurs limites<\/h2><p>Pendant de nombreuses ann\u00e9es, les d\u00e9cisions en mati\u00e8re d&#039;irrigation reposaient principalement sur l&#039;exp\u00e9rience de l&#039;agriculteur, l&#039;observation directe du terrain et des rotations pr\u00e9d\u00e9finies.<br \/><strong>L&#039;exp\u00e9rience demeure un \u00e9l\u00e9ment essentiel de la gestion agronomique<\/strong>, mais en pr\u00e9sence de conditions m\u00e9t\u00e9orologiques tr\u00e8s variables, cela peut ne pas suffire \u00e0 comprendre ce qui se passe dans l&#039;ensemble de la situation.<br \/>Deux zones d&#039;un m\u00eame champ peuvent en fait r\u00e9agir diff\u00e9remment aux m\u00eames conditions m\u00e9t\u00e9orologiques en raison des caract\u00e9ristiques du sol, du d\u00e9veloppement de la v\u00e9g\u00e9tation, de la disponibilit\u00e9 en eau ou d&#039;autres facteurs agronomiques.<br \/>Il y a ensuite un autre probl\u00e8me\u00a0: <strong>lorsque les souffrances de la r\u00e9colte deviennent clairement visibles, le stress est d\u00e9j\u00e0 en cours.<\/strong>.<br \/>Pour cette raison, la gestion de l&#039;irrigation peut b\u00e9n\u00e9ficier de <strong>des outils capables d&#039;observer l&#039;\u00e9volution des cultures au fil du temps<\/strong> et fournir des informations exploitables avant qu&#039;un probl\u00e8me critique ne devienne visible et n&#039;entra\u00eene potentiellement une perte de production.<\/p><h2>Des donn\u00e9es satellitaires \u00e0 la gestion de l&#039;irrigation<\/h2><p>C\u2019est dans cette transition de la r\u00e9action \u00e0 la pr\u00e9vention que l\u2019Agriculture 4.0 peut apporter une contribution concr\u00e8te.<br \/>En traitant les donn\u00e9es acquises \u00e0 partir de <strong>Satellites Sentinel-2 et Landsat 8 et 9<\/strong>, TETHYS vous permet de surveiller les parcelles tout au long de leur cycle de croissance sans n\u00e9cessiter l&#039;installation de capteurs ou d&#039;autres \u00e9quipements sur le terrain.<br \/>Les images satellites nous permettent d&#039;observer syst\u00e9matiquement de vastes zones et de comparer \u00e0 la fois diff\u00e9rentes zones d&#039;une m\u00eame parcelle et l&#039;\u00e9volution de la v\u00e9g\u00e9tation au fil du temps.<\/p><p><strong>Les donn\u00e9es deviennent ainsi un outil d&#039;aide \u00e0 la d\u00e9cision en mati\u00e8re d&#039;agronomie.<\/strong>Cela ne remplace pas l&#039;exp\u00e9rience d&#039;une personne connaissant le domaine, mais cela apporte un niveau d&#039;information qu&#039;il serait difficile d&#039;obtenir par la seule observation directe.<\/p><h2>TETHYS WATCH et AQUA pour la surveillance et la planification<\/h2><p>\u00c0 l&#039;int\u00e9rieur du quai, <a href=\"https:\/\/tethys.farm\/fr\/watch\/\">T\u00c9THYS WATCH<\/a> Il permet de surveiller l&#039;\u00e9tat v\u00e9g\u00e9tatif des cultures gr\u00e2ce au traitement des donn\u00e9es satellitaires.<br \/>Le <strong>indices de v\u00e9g\u00e9tation<\/strong> Elles permettent d&#039;analyser les param\u00e8tres li\u00e9s \u00e0 la vigueur et au d\u00e9veloppement de la culture et de mettre en \u00e9vidence les diff\u00e9rences au sein de la parcelle. L&#039;analyse des s\u00e9ries temporelles permet \u00e9galement de comparer l&#039;\u00e9volution des diff\u00e9rentes zones et de <strong>identifier les anomalies<\/strong> qui m\u00e9ritent des recherches plus approfondies sur le terrain.<\/p><p>La surveillance est prise en charge par <a href=\"https:\/\/tethys.farm\/fr\/aqua\/\">T\u00c9THYS AQUA<\/a>, le module d\u00e9di\u00e9 \u00e0 la gestion de l&#039;irrigation.<br \/>AQUA acquiert des informations sur les conditions des cultures et les conditions m\u00e9t\u00e9orologiques pour<strong> pr\u00e9parer un \u00e9quilibre hydrique quotidien<\/strong> et donc fournir <strong>indications sur la quantit\u00e9 d&#039;eau n\u00e9cessaire et le meilleur moment pour irriguer<\/strong>, avec un programme pour les quatre prochains jours.<br \/>De cette mani\u00e8re, l&#039;irrigation peut \u00eatre programm\u00e9e en fonction de <strong>besoins r\u00e9els des cultures<\/strong>, en \u00e9vitant \u00e0 la fois les contributions insuffisantes et les distributions sup\u00e9rieures aux besoins.<br \/>L&#039;utilisation de TETHYS AQUA peut permettre un <strong>\u00c9conomies d&#039;eau sup\u00e9rieures \u00e0 celles du mod\u00e8le 40%<\/strong>, transformant l&#039;eau d&#039;une ressource g\u00e9r\u00e9e principalement en r\u00e9ponse aux situations d&#039;urgence en une variable qui peut \u00eatre surveill\u00e9e et planifi\u00e9e dans le temps.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>La chaleur et la s\u00e9cheresse ne sont plus des situations d&#039;urgence. Les donn\u00e9es satellitaires permettent de surveiller les cultures et de planifier l&#039;irrigation plus efficacement.<\/p>","protected":false},"featured_media":12799,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[83],"tags":[74,64,62,69,73,63,65,79],"class_list":["post-12792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agricoltura-di-precisione","tag-acqua","tag-agricoltura-4-0","tag-agricoltura-di-precisione","tag-cambiamento-climatico","tag-irrigazione","tag-precision-farming","tag-satelliti","tag-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Caldo e siccit\u00e0 in agricoltura: gestire l\u2019acqua oltre l\u2019emergenza<\/title>\n<meta name=\"description\" content=\"Caldo e siccit\u00e0 in agricoltura richiedono nuove strategie. 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