{"id":9907,"date":"2017-09-21T03:14:54","date_gmt":"2017-09-21T08:14:54","guid":{"rendered":"https:\/\/www.insta-pro.com\/?p=9907"},"modified":"2019-07-22T02:21:49","modified_gmt":"2019-07-22T07:21:49","slug":"evaluation-des-ingredients-effet-de-la-teneur-en-matieres-grasses-dans-les-aliments-chez-les-volailles-2e-partie","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/evaluation-des-ingredients-effet-de-la-teneur-en-matieres-grasses-dans-les-aliments-chez-les-volailles-2e-partie\/","title":{"rendered":"\u00c9valuation des ingr\u00e9dients \u2013 Effet de la teneur en mati\u00e8res grasses dans les aliments chez les volailles \u2013 2e partie"},"content":{"rendered":"

Dans la 1re partie<\/a>, j\u2019ai parl\u00e9 de l\u2019effet de la teneur en fibres brutes (quantit\u00e9 de glucides non digestibles) sur le contenu en \u00e9nergie m\u00e9tabolisable dans les r\u00e9gimes alimentaires pour poulets de chair.  \u00c0 mesure que la teneur en fibres alimentaires augmente, la quantit\u00e9 d\u2019\u00e9nergie m\u00e9tabolisable, c\u2019est-\u00e0-dire en \u00e9nergie qui peut \u00eatre utilis\u00e9e pour la croissance et le d\u00e9veloppement<\/a>, diminue, parce que les volailles ont un syst\u00e8me digestif qui ne peut pas accueillir beaucoup de fibres.<\/p>\n

Ainsi, lors de l\u2019\u00e9valuation d\u2019ingr\u00e9dients, il est important que vous ayez des connaissances en nutrition et en physiologie pour vous aider \u00e0 guider votre programme de formulation.<\/p>\n

Les huiles et graisses alimentaires sont une autre grande cat\u00e9gorie d\u2019ingr\u00e9dients qui doit \u00eatre bien comprise.  Ce qui est bien connu, c\u2019est que les graisses et les huiles sont des sources d\u2019\u00e9nergie concentr\u00e9e. Elles contiennent environ 2,25 fois plus d\u2019\u00e9nergie<\/a> qu\u2019une quantit\u00e9 \u00e9quivalente de glucides.  Il est aussi presque toujours vrai que les graisses et les huiles sont co\u00fbteuses.<\/p>\n

Donc, \u00e9tant donn\u00e9 que les r\u00e9gimes alimentaires pour animaux sont formul\u00e9s de mani\u00e8re \u00e0 contenir une certaine quantit\u00e9 d\u2019\u00e9nergie<\/a> et que d\u2019autres nutriments sont li\u00e9s \u00e0 cette quantit\u00e9 d\u2019\u00e9nergie<\/a>, l\u2019ajout d\u2019ingr\u00e9dients contenant des mati\u00e8res grasses ou de l\u2019huile est tr\u00e8s courant.  Il est facile de voir pourquoi cela est vrai en examinant les donn\u00e9es de l\u2019\u00e9tude que j\u2019ai mentionn\u00e9e dans la 1re partie<\/a>, pr\u00e9sent\u00e9es ci-dessous.<\/p>\n

\"Graphique

Graphique repr\u00e9sentant le niveau d\u2019\u00e9nergie en fonction de l\u2019apport en mati\u00e8res grasses<\/p><\/div>\n

Il existe une relation claire, qui est souvent exploit\u00e9e par les nutritionnistes : ajouter un peu de graisses alimentaires augmente l\u2019\u00e9nergie m\u00e9tabolisable chez les volailles.  Cela est souvent utilis\u00e9 pour r\u00e9pondre aux besoins en \u00e9nergie \u00e0 un stade particulier de la production.  Il est par ailleurs int\u00e9ressant de noter que le gain en \u00e9nergie m\u00e9tabolisable offert par l\u2019ajout de graisses alimentaires sature \u00e0 un certain point \u2013 comme montr\u00e9 ci-dessus, lorsque la teneur en mati\u00e8res grasses augmente de 7,12 \u00e0 9,32 % .<\/p>\n

Mais il faut garder \u00e0 l\u2019esprit que la relation entre la teneur en mati\u00e8res grasses dans l\u2019aliment et le niveau d\u2019\u00e9nergie m\u00e9tabolisable n\u2019est pas toujours si \u00e9vidente.  Par exemple, le type et la qualit\u00e9 de la graisse ou de l\u2019huile peuvent avoir une grande incidence sur la quantit\u00e9 d\u2019\u00e9nergie m\u00e9tabolisable, comme je l\u2019ai \u00e9crit dans un article pr\u00e9c\u00e9dent<\/a>, surtout chez les jeunes volailles.  De mani\u00e8re g\u00e9n\u00e9rale, les huiles v\u00e9g\u00e9tales, comme l\u2019huile de soja, offrent des niveaux d\u2019\u00e9nergie m\u00e9tabolisable sup\u00e9rieurs aux graisses animales.<\/p>\n

Il est \u00e9galement important d\u2019envisager l\u2019utilisation d\u2019ingr\u00e9dients de haute qualit\u00e9 contenant de l\u2019huile r\u00e9siduelle, comme les graines de soja enti\u00e8res extrud\u00e9es \u00e0 sec (soja non d\u00e9shuil\u00e9 extrud\u00e9)<\/a> avec un cisaillement \u00e9lev\u00e9 et le tourteau de soja extrud\u00e9 et press\u00e9 (ExPress\u00ae)<\/a>.  Ces ingr\u00e9dients constituent une source d\u2019acides amin\u00e9s hautement digestibles, plus une ample source d\u2019\u00e9nergie disponible, en un seul produit.  Dans de nombreux cas, il est ainsi possible de se passer d\u2019autres sources d\u2019\u00e9nergie, telles que des huiles v\u00e9g\u00e9tales (qui sont ch\u00e8res, comme vous le savez), ce qui se traduit par une formulation moins co\u00fbteuse, qui offre un niveau de performance identique ou sup\u00e9rieur.<\/p>\n

Dans la 3e partie, je parlerai d\u2019une autre consid\u00e9ration importante pour les formulations.  Veuillez nous contacter pour plus d\u2019informations.<\/p>\n","protected":false},"excerpt":{"rendered":"

Dans la 1re partie, j\u2019ai parl\u00e9 de l\u2019effet de la teneur en fibres brutes (quantit\u00e9 de glucides non digestibles) sur le contenu en \u00e9nergie m\u00e9tabolisable dans les r\u00e9gimes alimentaires pour poulets de chair.  \u00c0 mesure que la teneur en fibres alimentaires augmente, la quantit\u00e9 d\u2019\u00e9nergie m\u00e9tabolisable, c\u2019est-\u00e0-dire en \u00e9nergie qui peut \u00eatre utilis\u00e9e pour la croissance […]<\/p>\n","protected":false},"author":13,"featured_media":10544,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7181],"tags":[637],"class_list":["post-9907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition-et-technologies","tag-formulation-de-lalimentation-animale"],"acf":[],"yoast_head":"\n\u00c9valuation des ingr\u00e9dients \u2013 Effet de la teneur en mati\u00e8res grasses dans les aliments chez les volailles \u2013 2e\u00a0partie<\/title>\n<meta name=\"description\" content=\"Ce qui est bien connu, c\u2019est que les graisses et les huiles sont des sources d\u2019\u00e9nergie concentr\u00e9e. 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