

{"id":56771,"date":"2019-06-13T22:00:49","date_gmt":"2019-06-13T22:00:49","guid":{"rendered":"https:\/\/www.zinpro.com\/heat-stress-management-critical-in-poultry-production\/"},"modified":"2023-07-19T13:09:53","modified_gmt":"2023-07-19T18:09:53","slug":"heat-stress-management-critical-in-poultry-production","status":"publish","type":"post","link":"https:\/\/www.zinpro.com\/fr\/resource-center\/blog\/heat-stress-management-critical-in-poultry-production\/","title":{"rendered":"La gestion du stress thermique est essentielle dans la production avicole"},"content":{"rendered":"<p>Le stress thermique peut contribuer \u00e0 de nombreux probl\u00e8mes de production et peut s'av\u00e9rer co\u00fbteux pour les producteurs de volailles. En cas de stress thermique, les oiseaux mangent moins qu'ils ne le devraient pour r\u00e9duire leur temp\u00e9rature corporelle, ce qui entra\u00eene une r\u00e9duction de la consommation d'\u00e9nergie m\u00e9tabolisable. Les effets n\u00e9fastes du stress thermique sur les poulets de chair et les poules pondeuses vont de la r\u00e9duction de la croissance et de la production d'\u0153ufs \u00e0 la diminution de la qualit\u00e9 de la viande et des \u0153ufs, en passant par le bien-\u00eatre.&nbsp;<\/p>\n\n\n\n<p>La dur\u00e9e de vie productive des volailles est beaucoup plus courte que celle des autres animaux : environ 47 jours pour les poulets de chair et jusqu'\u00e0 un an pour les poules pondeuses. C'est pourquoi la marge d'erreur dans la gestion du stress thermique est beaucoup plus faible que chez les animaux plus grands, car ils ont moins de temps pour se r\u00e9tablir.&nbsp;<\/p>\n\n\n\n<p>Les probl\u00e8mes de production li\u00e9s au stress thermique peuvent \u00eatre observ\u00e9s au cours de la premi\u00e8re semaine de vie de l'oiseau, car les jeunes poussins ne d\u00e9veloppent pas compl\u00e8tement leur capacit\u00e9 \u00e0 r\u00e9guler leur temp\u00e9rature corporelle. Le tube digestif montre des signes de faiblesse et acc\u00e9l\u00e8re le transit des aliments, ce qui entra\u00eene une r\u00e9duction consid\u00e9rable de la digestion et de l'absorption des nutriments.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-do-chickens-dissipate-body-heat\">Comment les poulets dissipent-ils leur chaleur corporelle ? <\/h3>\n\n\n\n<p>Contrairement aux autres animaux, les oiseaux n'ont pas de glandes sudoripares qui les aident \u00e0 perdre de la chaleur. Les oiseaux \u00e9liminent l'exc\u00e8s de chaleur corporelle de quatre mani\u00e8res principales : par rayonnement, par conduction, par convection et, lorsque ces trois mani\u00e8res ne suffisent pas, par \u00e9vaporation.&nbsp;<\/p>\n\n\n\n<p>Le rayonnement se produit lorsque l'oiseau transf\u00e8re la chaleur de la surface de sa peau, \u00e0 travers l'air, vers un autre objet, y compris d'autres oiseaux. C'est l\u00e0 que les fortes densit\u00e9s de volailles deviennent un d\u00e9fi pendant les mois chauds de l'\u00e9t\u00e9.&nbsp;<\/p>\n\n\n\n<p>Les oiseaux dissipent leur chaleur corporelle par conduction en la transf\u00e9rant \u00e0 des objets plus froids avec lesquels ils entrent en contact, comme les mangeoires, les lattes ou l'eau des arroseurs. Cela aussi peut devenir un d\u00e9fi, car les arroseurs augmentent l'humidit\u00e9, ce qui accro\u00eet la sensation thermique due \u00e0 la chaleur.&nbsp;<\/p>\n\n\n\n<p>La convection se produit lorsque le vent entre en contact avec la peau et \u00e9vacue la chaleur. Les poulets soul\u00e8vent souvent leurs ailes pour exposer leur peau l\u00e9g\u00e8rement plum\u00e9e et augmenter la surface de dissipation de la chaleur corporelle.&nbsp;<\/p>\n\n\n\n<p>Lorsque la temp\u00e9rature corporelle d'un oiseau atteint 41\u00b0C, l'efficacit\u00e9 de la radiation, de la conduction et de la convection est r\u00e9duite, et l'\u00e9vaporation de l'eau des voies respiratoires par le hal\u00e8tement devient le principal m\u00e9canisme de perte de chaleur. L'\u00e9vaporation d'un gramme d'eau est capable de dissiper 540 calories d'\u00e9nergie de maintien. En outre, les cavit\u00e9s nasales des oiseaux filtrent la poussi\u00e8re et les bact\u00e9ries de l'air qui p\u00e9n\u00e8tre dans les voies respiratoires. L'utilisation du syst\u00e8me respiratoire pour la perte de chaleur par \u00e9vaporation peut entra\u00eener une augmentation de l'incidence des secondes infections bact\u00e9riennes. Finalement, sans soulagement de la chaleur, les oiseaux s'\u00e9puisent souvent \u00e0 cause de la chaleur.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-heat-stress-in-poultry-leads-to-inflammation\">Le stress thermique chez les volailles entra\u00eene une inflammation<\/h3>\n\n\n\n<p>Lorsque l'apport alimentaire est r\u00e9duit en cas de stress thermique, les oiseaux ont \u00e9galement un flux sanguin r\u00e9duit dans le tractus gastro-intestinal, ce qui entra\u00eene une r\u00e9duction de la quantit\u00e9 d'oxyg\u00e8ne (hypoxie) et un stress oxydatif dans les tissus intestinaux. En cons\u00e9quence, les jonctions serr\u00e9es qui maintiennent les cellules \u00e9pith\u00e9liales (ent\u00e9rocytes) ensemble s'affaiblissent, ce qui augmente la perm\u00e9abilit\u00e9 et permet aux agents pathog\u00e8nes et \u00e0 leurs toxines de p\u00e9n\u00e9trer dans le tractus gastro-intestinal. C'est ce qu'on appelle l'intestin perm\u00e9able, qui peut entra\u00eener une inflammation chronique. Cette inflammation incite le syst\u00e8me immunitaire \u00e0 consommer des quantit\u00e9s importantes de nutriments pour faire face \u00e0 l'inflammation, ce qui r\u00e9duit la quantit\u00e9 de nutriments disponibles pour la croissance musculaire ou la production d'\u0153ufs.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-heat-stress-impacts-eggshell-formation\">Le stress thermique a un impact sur la formation de la coquille d'\u0153uf<\/h3>\n\n\n\n<p>Lorsque les poulets hal\u00e8tent, ils perdent du CO2 par la respiration, ce qui rend le pH du sang plus alcalin et r\u00e9duit la quantit\u00e9 de calcium ionis\u00e9 dans le sang, ce qui peut entra\u00eener des probl\u00e8mes osseux.&nbsp;<\/p>\n\n\n\n<p>Pour les poules pondeuses, \u00e9tant donn\u00e9 qu'elles ont besoin d'une grande quantit\u00e9 de calcium pour la formation de la coquille de l'\u0153uf, cela se traduit souvent par le d\u00e9veloppement d'\u0153ufs \u00e0 coquille fine ou plus petits et\/ou une diminution de la production d'\u0153ufs. Pour les poulets de chair, les producteurs constatent souvent une diminution suppl\u00e9mentaire de la consommation d'aliments, de l'efficacit\u00e9 de l'alimentation et du taux de croissance.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-performance-trace-mineral-nutrition-for-heat-stress-management\">Nutrition en oligo-\u00e9l\u00e9ments pour la gestion du stress thermique<\/h3>\n\n\n\n<p>La gestion des probl\u00e8mes de production li\u00e9s au stress thermique dans l'\u00e9levage de volailles peut \u00eatre att\u00e9nu\u00e9e en adaptant le programme de nutrition des volailles. Les changements majeurs apport\u00e9s au r\u00e9gime alimentaire pendant les mois d'\u00e9t\u00e9 doivent toujours viser \u00e0 r\u00e9duire le stress oxydatif, \u00e0 pr\u00e9server l'int\u00e9grit\u00e9 des tissus \u00e9pith\u00e9liaux du tractus gastro-intestinal et \u00e0 augmenter la tol\u00e9rance \u00e0 la chaleur.&nbsp;<\/p>\n\n\n\n<p>Les principaux changements nutritionnels que les producteurs de volailles et les nutritionnistes doivent prendre en compte pendant les mois chauds de l'\u00e9t\u00e9 sont les suivants :&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Alimentation plus dense en nutriments pour compenser la r\u00e9duction de l'apport alimentaire&nbsp;<\/li>\n\n\n\n<li>Inclure des oligo-\u00e9l\u00e9ments de performance dans les r\u00e9gimes alimentaires, afin d'augmenter la capacit\u00e9 antioxydante et la tol\u00e9rance thermique de l'organisme des oiseaux.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-reducing-oxidative-stress-increasing-thermal-tolerance\">R\u00e9duction du stress oxydatif, augmentation de la tol\u00e9rance thermique<\/h3>\n\n\n\n<p>Pendant les mois chauds de l'\u00e9t\u00e9, l'utilisation d'oligo-\u00e9l\u00e9ments performants est cruciale. Les syst\u00e8mes antioxydants les plus importants dans l'organisme animal d\u00e9pendent du zinc, du mangan\u00e8se, du cuivre et du s\u00e9l\u00e9nium. Ils servent de cofacteurs aux mol\u00e9cules et \u00e0 l'activation des enzymes, comme le syst\u00e8me SOD (Superoxyde dismutase) et la glutathion peroxydase (GPx). Le stress oxydatif survient lorsque les radicaux libres et les antioxydants sont en d\u00e9s\u00e9quilibre. Ces syst\u00e8mes antioxydants agissent en \u00e9liminant les radicaux libres et en prot\u00e9geant les membranes cellulaires du stress oxydatif.&nbsp;<\/p>\n\n\n\n<p>Le zinc joue \u00e9galement un r\u00f4le essentiel dans la formation des composants structurels des tissus, des mol\u00e9cules et des cellules \u00e9pith\u00e9liales pr\u00e9sents dans l'intestin. Les recherches montrent que l'apport de zinc provenant de <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-zn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro\u00ae Availa\u00ae Zn<\/a> renforce les liens entre les cellules \u00e9pith\u00e9liales du tractus gastro-intestinal, en aidant \u00e0 maintenir les jonctions serr\u00e9es pendant une \u00e9preuve et en r\u00e9duisant l'apparition d'une inflammation intestinale li\u00e9e \u00e0 une fuite de l'intestin.&nbsp;<\/p>\n\n\n\n<p>Chrome provenant de <a href=\"https:\/\/www.zinpro.com\/fr\/product\/zinpro-availa-cr\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro\u00ae Availa\u00ae Cr<\/a> ou <a href=\"https:\/\/www.zinpro.com\/fr\/products\/original-line\/microplex\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro\u00ae MICROPLEX\u00ae<\/a> peut augmenter la tol\u00e9rance thermique en contribuant \u00e0 r\u00e9duire le niveau de corticost\u00e9rone - impliqu\u00e9 dans la r\u00e9gulation de l'\u00e9nergie, des r\u00e9actions immunitaires et des r\u00e9ponses au stress - chez les volailles. Des niveaux \u00e9lev\u00e9s de corticost\u00e9rone entra\u00eenent chez les animaux un comportement agit\u00e9, une d\u00e9pense d'\u00e9nergie et, en fin de compte, une r\u00e9duction de la consommation d'aliments. <a href=\"https:\/\/www.zinpro.com\/fr\/performance-trace-minerals-help-mitigate-impact-of-heat-stress-in-poultry\/\" target=\"_blank\" rel=\"noreferrer noopener\">Diminution du taux de corticost\u00e9rone avec Zinpro Availa Cr ou Zinpro MICROPLEX<\/a> peut aider les animaux \u00e0 rester calmes et \u00e0 manger plus volontiers en cas de stress thermique.\u00a0<\/p>\n\n\n\n<p>Le stress thermique peut entra\u00eener des probl\u00e8mes de production qui sont co\u00fbteux pour les producteurs de volailles. En incluant des oligo-\u00e9l\u00e9ments de performance dans votre programme de nutrition des volailles, vous pouvez contribuer \u00e0 att\u00e9nuer ces d\u00e9fis et \u00e0 rendre votre exploitation plus rentable.&nbsp;<\/p>\n\n\n\n<p>Contactez un repr\u00e9sentant Zinpro d\u00e8s aujourd'hui pour en savoir plus sur l'inclusion des Min\u00e9raux de Performance Zinpro\u00ae, tels que <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-cr\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro Availa Cr<\/a>, <a href=\"https:\/\/www.zinpro.com\/fr\/products\/original-line\/microplex\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro MICROPLEX<\/a>, <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-zn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro Availa Zn<\/a>, <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-mn\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro\u00ae Availa\u00ae Mn<\/a>, <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-cu\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro\u00ae Availa\u00ae Cu<\/a> et <a href=\"https:\/\/www.zinpro.com\/fr\/products\/availa-mins\/availa-se\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zinpro\u00ae Availa\u00ae Se<\/a> dans vos programmes de nutrition du b\u00e9tail et de la volaille.&nbsp;<\/p>\n\n\n\n<p><em>Note : Tous les produits ne sont pas disponibles sur tous les march\u00e9s.<\/em>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Saviez-vous que les effets du stress thermique sont per\u00e7us plus t\u00f4t chez les volailles que chez les autres animaux parce que leur vie productive est beaucoup plus courte ? Nous expliquons pourquoi la gestion du stress thermique est essentielle et comment les oligo-\u00e9l\u00e9ments de performance peuvent aider.<\/p>","protected":false},"author":45,"featured_media":56772,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_tec_requires_first_save":true,"_eb_attr":"","_uag_custom_page_level_css":"","_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,"_tribe_blocks_recurrence_rules":"","_tribe_blocks_recurrence_description":"","_tribe_blocks_recurrence_exclusions":"","_ecp_custom_2":"","footnotes":""},"categories":[2682],"tags":[2693,2683,2692,2715,2684,2689,2686],"species":[942],"class_list":["post-56771","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-animal-husbandry","tag-animal-performance","tag-animal-welfare","tag-eggshell-quality","tag-health","tag-heat-stress","tag-inflammation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Heat Stress Management Critical in Poultry Production &#8211; Zinpro\u00ae<\/title>\n<meta name=\"description\" content=\"posts from Zinpro\u00ae about Heat Stress Management Critical in Poultry Production . 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