{"id":8877,"date":"2014-09-25T07:56:06","date_gmt":"2014-09-25T12:56:06","guid":{"rendered":"https:\/\/www.insta-pro.com\/2014\/09\/25\/lecons-tirees-de-la-prediction-de-la-qualite-des-ddgs-1re-partie-premieres-observations\/"},"modified":"2019-07-22T03:29:14","modified_gmt":"2019-07-22T08:29:14","slug":"lecons-tirees-de-la-prediction-de-la-qualite-des-ddgs-1re-partie-premieres-observations","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/lecons-tirees-de-la-prediction-de-la-qualite-des-ddgs-1re-partie-premieres-observations\/","title":{"rendered":"LE\u00c7ONS TIR\u00c9ES DE LA PR\u00c9DICTION DE LA QUALIT\u00c9 DES DDGS, 1RE PARTIE : \u00c9QUATION DE PR\u00c9DICTION"},"content":{"rendered":"<p>Une <a href=\"http:\/\/www.ddgs.umn.edu\/prod\/groups\/cfans\/@pub\/@cfans\/@ansci\/documents\/asset\/cfans_asset_475460.pdf\">r\u00e9cente publication<\/a> sur les variations de qualit\u00e9 des DDGS (dr\u00eaches de distillerie avec solubles), comportant des tentatives de sa pr\u00e9vision \u00e0 l\u2019aide d\u2019\u00e9quations, a une fois de plus mis en avant les probl\u00e8mes inh\u00e9rents \u00e0 l\u2019utilisation de cet ingr\u00e9dient pour soutenir les performances des animaux.<\/p>\n<p>Les dr\u00eaches de distillerie avec solubles, ou DDGS (Distillers Dried Grains with Solubles), sont un sous-produit de l\u2019industrie florissante du biocarburant issu du ma\u00efs (\u00e9thanol).\u00a0 De ce fait, les DDGS se trouvent facilement \u00e0 un prix modique\u00a0; c\u2019est la raison pour laquelle elles sont utilis\u00e9es dans l\u2019alimentation des animaux d\u2019\u00e9levage.\u00a0 Ce produit est souvent utilis\u00e9 pour remplacer une partie du ma\u00efs, du tourteau de soja et \u00e9ventuellement du phosphore, dans un aliment complet.\u00a0 Ceci implique une contrainte car les DDGS sont sujettes \u00e0 des variations quant \u00e0 la teneur et la qualit\u00e9 de leurs nutriments\u00a0; c\u2019est ce qui a pouss\u00e9 \u00e0 <a href=\"http:\/\/www.ddgs.umn.edu\/prod\/groups\/cfans\/@pub\/@cfans\/@ansci\/documents\/asset\/cfans_asset_475460.pdf\">\u00e9laborer des \u00e9quations de pr\u00e9diction<\/a> afin de d\u00e9terminer la qualit\u00e9 de chaque lot.\u00a0 Pour les raisons expliqu\u00e9es plus bas, l\u2019\u00e9nergie contenue dans les DDGS peut varier consid\u00e9rablement, et pr\u00e9voir la quantit\u00e9 d\u2019\u00e9nergie des DDGS est important <a href=\"https:\/\/www.insta-pro.com\/fr\/2013\/06\/18\/energy-in-performance-out\/\">pour soutenir et maximiser les performances des animaux<\/a>.<\/p>\n<p>Comme expliqu\u00e9 dans l\u2019article, il est important de faire ressortir les plages de variation existantes.\u00a0 Les auteurs se sont procur\u00e9 15 \u00e9chantillons de DDGS provenant d\u2019usine d\u2019\u00e9thanol du Midwest aux \u00c9tats-Unis\u00a0; ils ont mesur\u00e9 les diff\u00e9rentes teneurs en nutriments et ont men\u00e9 des exp\u00e9riences sur les poussins en vue de d\u00e9terminer l\u2019\u00e9nergie m\u00e9tabolisable disponible (utilisable \u00e0 des fins de productivit\u00e9, comme le gain de masse musculaire des poulets pour la viande) \u2013 tout ceci pour donner une indication de la qualit\u00e9.<\/p>\n<p>La premi\u00e8re figure illustre la quantit\u00e9 totale des \u00e9nergies (\u00e9nergies brutes, ou EB) dans les 15\u00a0\u00e9chantillons de DDGS, avec les \u00e9nergies m\u00e9tabolisables r\u00e9sultantes (AMEn) mesur\u00e9es lors des exp\u00e9riences faites par rapport \u00e0 l\u2019alimentation.\u00a0 L\u2019\u00e9nergie brute mesure simplement la chaleur totale (<a href=\"http:\/\/en.wikipedia.org\/wiki\/Calorie\">kilocalories<\/a>) lib\u00e9r\u00e9e lorsque les \u00e9chantillons \u00e9taient br\u00fbl\u00e9s, alors que l\u2019\u00e9nergie m\u00e9tabolisable tient compte de ce qui se passe lorsqu\u2019elle est apport\u00e9e aux poussins.<\/p>\n<p>Comme on peut le voir ci-dessous, les valeurs d\u2019EB ont \u00e9t\u00e9 tr\u00e8s variables dans les \u00e9chantillons des DDGS.\u00a0 De fa\u00e7on semblable, les AMEn des \u00e9chantillons ont montr\u00e9 encore plus de variations.\u00a0 Enfin, ce qui est peut-\u00eatre le plus \u00e9tonnant, c\u2019est \u00e0 quel point les valeurs AMEn \u00e9taient inf\u00e9rieures aux valeurs d\u2019EB.\u00a0 Les auteurs affirment que la valeur moyenne AMEn \u00e9tait de 46\u00a0% de l\u2019EB \u2013 seulement 46% de l\u2019\u00e9nergie totale dans les DDGS \u00e9taient utilisable pour la croissance et des objectifs de productivit\u00e9.<\/p>\n<p><a href=\"https:\/\/www.insta-pro.com-content\/uploads\/2014\/09\/DDGS-graph-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1781\" src=\"https:\/\/www.insta-pro.com-content\/uploads\/2014\/09\/DDGS-graph-1-300x195.png\" alt=\"Graphique DDGS 1\" width=\"400\" height=\"261\" \/><\/a><\/p>\n<p>Alors, pourquoi ces r\u00e9sultats\u00a0?\u00a0 Dans la figure suivante se trouvent les donn\u00e9es sur plusieurs nutriments des 15\u00a0\u00e9chantillons de DDGS.\u00a0 Sans surprise, les quantit\u00e9s de prot\u00e9ines brutes (PB), d\u2019amidon, de fibres (NDF) et d\u2019huile ont \u00e9t\u00e9 variables.\u00a0 Par exemple, un \u00e9chantillon avait une valeur d\u2019extrait \u00e9ther (huile) de 3,2\u00a0%, alors qu\u2019un autre donnait 13,2\u00a0%.\u00a0 L\u2019huile \u00e9tant une forme <a href=\"http:\/\/en.wikipedia.org\/wiki\/Food_energy\">d\u2019\u00e9nergie concentr\u00e9e<\/a>, ce serait probl\u00e9matique pour un nutritionniste volaille de formuler les rations alimentaires pour obtenir les meilleures performances au moindre co\u00fbt.<\/p>\n<p><a href=\"https:\/\/www.insta-pro.com-content\/uploads\/2014\/09\/DDGS-graph-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1782\" src=\"https:\/\/www.insta-pro.com-content\/uploads\/2014\/09\/DDGS-graph-2-300x235.png\" alt=\"Graphique DDGS 2\" width=\"400\" height=\"314\" \/><\/a><\/p>\n<p>Donc pour conclure, les DDGS sont abondantes et peu co\u00fbteuses, mais pr\u00e9sentent des variations consid\u00e9rables dans leur teneur en nutriments et la qualit\u00e9 de leur \u00e9nergie lorsqu\u2019elles sont ing\u00e9r\u00e9es par les poussins.\u00a0 Pour une formulation d\u2019aliment ad\u00e9quate en vue de maximiser la production de viande des poulets, il est n\u00e9cessaire de r\u00e9aliser des tests et d\u2019\u00eatre tr\u00e8s attentif pour d\u00e9terminer la valeur de chaque lot de DDGS.<\/p>\n<p>Dans la 2<sup>e<\/sup> partie, je d\u00e9taillerai la partie \u00e9quations de pr\u00e9diction de cet article, j\u2019aborderai les difficult\u00e9s rencontr\u00e9es vis-\u00e0-vis de l\u2019\u00e9laboration des \u00e9quations, et j\u2019examinerai ce que cela montre quant \u00e0 l\u2019utilisation des DDGS dans les aliments des animaux d\u2019\u00e9levage.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une r\u00e9cente publication sur les variations de qualit\u00e9 des DDGS (dr\u00eaches de distillerie avec solubles), comportant des tentatives de sa pr\u00e9vision \u00e0 l\u2019aide d\u2019\u00e9quations, a une fois de plus mis en avant les probl\u00e8mes inh\u00e9rents \u00e0 l\u2019utilisation de cet ingr\u00e9dient pour soutenir les performances des animaux. Les dr\u00eaches de distillerie avec solubles, ou DDGS (Distillers [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":10564,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7181],"tags":[637,592],"class_list":["post-8877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition-et-technologies","tag-formulation-de-lalimentation-animale","tag-transformation-pour-lalimentation-humaine-ou-animale-fr-2"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Le\u00e7ons tir\u00e9es de la pr\u00e9diction de la qualit\u00e9 des DDGS, 1re partie\u00a0: premi\u00e8res observations<\/title>\n<meta name=\"description\" content=\"Les dr\u00eaches de distillerie avec solubles, ou DDGS (Distillers Dried 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