{"id":8876,"date":"2014-10-02T07:55:26","date_gmt":"2014-10-02T12:55:26","guid":{"rendered":"https:\/\/www.insta-pro.com\/2014\/10\/02\/lecons-tirees-de-la-prediction-de-la-qualite-des-ddgs-2e-partie-equation-de-prediction\/"},"modified":"2017-03-31T14:17:27","modified_gmt":"2017-03-31T19:17:27","slug":"lecons-tirees-de-la-prediction-de-la-qualite-des-ddgs-2e-partie-equation-de-prediction","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/lecons-tirees-de-la-prediction-de-la-qualite-des-ddgs-2e-partie-equation-de-prediction\/","title":{"rendered":"Le\u00e7ons tir\u00e9es de la pr\u00e9diction de la qualit\u00e9 des DDGS, 2e partie\u00a0: \u00c9quation de pr\u00e9diction"},"content":{"rendered":"

Dans mon pr\u00e9c\u00e9dent article<\/a>, j\u2019ai parl\u00e9 des donn\u00e9es issues d\u2019une r\u00e9cente publication<\/a> portant sur les variations de qualit\u00e9 des DDGS (dr\u00eaches de distillerie avec solubles), un sous-produit de l\u2019industrie de l\u2019\u00e9thanol provenant du ma\u00efs.\u00a0 Ceci a de l\u2019importance car les DDGS sont utilis\u00e9es pour remplacer d\u2019autres ingr\u00e9dients dans les aliments des animaux d\u2019\u00e9levage –\u00a0\u00e0 savoir le ma\u00efs, le soja et les sources de phosphore\u00a0– et montre une qualit\u00e9 tellement variable que les auteurs ont \u00e9labor\u00e9 une \u00e9quation de pr\u00e9diction pour d\u00e9terminer la valeur de chaque lot de DDGS.<\/p>\n

Tout d\u2019abord, ce n\u2019est pas rien quand plusieurs chercheurs en viennent \u00e0 \u00e9laborer et r\u00e9viser une \u00e9quation de pr\u00e9diction complexe (voir le d\u00e9bat dans l\u2019article<\/a> sur les diff\u00e9rentes \u00e9quations) pour un ingr\u00e9dient.\u00a0 Cela d\u00e9note assur\u00e9ment un manque de standardisation des proc\u00e9dures dans les usines de production d\u2019\u00e9thanol, qui consid\u00e8rent les DDGS comme un sous-produit.<\/p>\n

Pour \u00e9laborer l\u2019\u00e9quation de pr\u00e9diction la plus pr\u00e9cise, les auteurs ont \u00e9tudi\u00e9 toutes les donn\u00e9es sur les nutriments (dont certaines que j\u2019ai pr\u00e9sent\u00e9es dans la 1re partie<\/a>), et ont d\u00e9termin\u00e9 quels ensembles de donn\u00e9es, lorsque combin\u00e9s, pouvaient permettre de pr\u00e9voir l\u2019\u00e9nergie disponible pour la croissance des poussins.\u00a0 En r\u00e9sum\u00e9, ils ont r\u00e9pondu \u00e0 des questions comme celles qui suivent\u00a0: Si j\u2019inclus des donn\u00e9es sur les teneurs en prot\u00e9ines brutes, en extrait \u00e0 l\u2019\u00e9ther (huile), et en amidon des \u00e9chantillons DDGS, quelle amplitude de la variation d\u2019\u00e9nergie cela pourra-t-il expliquer\u00a0?\u00a0 Donc, d\u2019un point de vue pratique, si quelqu\u2019un ach\u00e8te un wagon de DDGS et conna\u00eet les teneurs en prot\u00e9ines brutes, en extrait \u00e0 l\u2019\u00e9ther (huile), et en amidon, pourra-t-il se servir de l\u2019\u00e9quation et avoir une id\u00e9e correcte de ce que ce lot pourra apporter dans la croissance des poussins\u00a0?<\/p>\n

Par t\u00e2tonnement, les auteurs ont conclu qu\u2019une \u00e9quation incluant l\u2019\u00e9nergie brute<\/a>, les prot\u00e9ines brutes<\/a>, les fibres (NDF<\/a>), et l\u2019amidon<\/a> offrirait la meilleure pr\u00e9diction quant \u00e0 l\u2019\u00e9nergie disponible pour soutenir les performances du poussin. \u00a0L\u2019\u00e9nergie brute (l\u2019\u00e9nergie totale dans chaque \u00e9chantillon de DDGS) et l\u2019amidon (une source d\u2019\u00e9nergie facilement assimilable) semblent s\u2019av\u00e9rer des indicateurs utiles quant \u00e0 l\u2019\u00e9nergie disponible pour le poussin.\u00a0 Les fibres, ou NDF, ne sont pas facilement dig\u00e9r\u00e9es par les poussins, et donc cela semble constituer un \u00e9l\u00e9ment important de l\u2019\u00e9quation de pr\u00e9diction.\u00a0 Les prot\u00e9ines brutes sont un composant majeur des DDGS, et montrent des variations\u00a0; c\u2019est donc aussi un facteur important pour les pr\u00e9visions.<\/p>\n

Ce qui est tr\u00e8s surprenant et significatif, c\u2019est que l\u2019extrait \u00e0 l\u2019\u00e9ther<\/a> (huile) a \u00e9t\u00e9 consid\u00e9r\u00e9 comme n\u2019\u00e9tant PAS un indicateur important de la disponibilit\u00e9 de l\u2019\u00e9nergie pour le poussin, m\u00eame si les valeurs d\u2019extrait \u00e0 l\u2019\u00e9ther s\u2019\u00e9talaient de 3,2 \u00e0 13,2\u00a0% dans les \u00e9chantillons de DDGS<\/a>, et que l\u2019huile est une source concentr\u00e9e d\u2019\u00e9nergie<\/a>.<\/p>\n

J\u2019ai d\u00e9termin\u00e9 l\u2019apport des DDGS dans la quantit\u00e9 totale de mati\u00e8re grasse\/d\u2019huile dans les r\u00e9gimes alimentaires exp\u00e9rimentaux, en consid\u00e9rant que le ma\u00efs contenait 4,8\u00a0% d\u2019huile, le tourteau de soja extrait par solvant 1\u00a0% et que la mati\u00e8re grasse des poulets \u00e9quivalait \u00e0 100\u00a0%.\u00a0 Sachant que les \u00e9chantillons de DDGS \u00e9taient int\u00e9gr\u00e9s \u00e0 hauteur de 15\u00a0% de la ration, et aussi connaissant la plage de valeurs pour la teneur en huile r\u00e9siduelle dans les \u00e9chantillons de DDGS, les contributions des DDGS suivantes dans la quantit\u00e9 totale de mati\u00e8res grasses\/d\u2019huile ont \u00e9t\u00e9 calcul\u00e9es\u00a0:<\/p>\n

\"DDGS\"<\/a><\/p>\n

Notez que, dans les cas les plus extr\u00eames, les DDGS ont contribu\u00e9 \u00e0 hauteur d\u2019environ 45\u00a0% d\u2019huile –\u00a0riche en \u00e9nergie\u00a0– par rapport \u00e0 la quantit\u00e9 totale de mati\u00e8res grasses\/d\u2019huile dans tout l\u2019aliment, mais que cela n\u2019a PAS \u00e9t\u00e9 consid\u00e9r\u00e9 comme important dans la pr\u00e9diction de l\u2019\u00e9nergie disponible pour le poussin en croissance.<\/p>\n

Nous pouvons en conclure que l\u2019huile r\u00e9siduelle dans les DDGS issues des usines de production d\u2019\u00e9thanol de ma\u00efs est de faible valeur, et est principalement sans importance lorsqu\u2019elle est ing\u00e9r\u00e9e par les poussins.\u00a0 Les auteurs ont pris en compte un taux d\u2019int\u00e9gration des DDGS de 15\u00a0% parce que c\u2019est courant dans la fili\u00e8re des poulets de chair.<\/p>\n

Nous ne devrions peut-\u00eatre pas \u00eatre surpris parce que les sources d\u2019\u00e9nergie de haute qualit\u00e9, telles que le soja entier extrud\u00e9<\/a>, contiennent une \u00e9nergie hautement assimilable qui contribue aux performances – d\u2019autant plus quand on les compare avec les deux types de DDGS<\/a>. \u00a0N\u2019h\u00e9sitez pas \u00e0 me contacter<\/a>, ou \u00e0 contacter le Dr Nabil Said<\/a>, pour parler des avantages li\u00e9s \u00e0 l\u2019utilisation d\u2019ingr\u00e9dients de haute qualit\u00e9 comme le soja entier extrud\u00e9 et le tourteau de soja partiellement d\u00e9graiss\u00e9 (ExPress\u00ae), en opposition aux inconv\u00e9nients de l\u2019utilisation d\u2019ingr\u00e9dients de faible qualit\u00e9, comme les DDGS.<\/p>\n

En conclusion, ce que nous montrent les r\u00e9cents travaux sur les \u00e9quations de pr\u00e9diction pour les DDGS, c\u2019est qu\u2019une attention toute particuli\u00e8re est requise lors de la s\u00e9lection d\u2019ingr\u00e9dients destin\u00e9s \u00e0 soutenir les performances des animaux \u2013 en particulier ceux pour lesquels la teneur en nutriments varie significativement, et l\u2019huile r\u00e9siduelle est de mauvaise qualit\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"

Dans mon pr\u00e9c\u00e9dent article, j\u2019ai parl\u00e9 des donn\u00e9es issues d\u2019une r\u00e9cente publication portant sur les variations de qualit\u00e9 des DDGS (dr\u00eaches de distillerie avec solubles), un sous-produit de l\u2019industrie de l\u2019\u00e9thanol provenant du ma\u00efs.\u00a0 Ceci a de l\u2019importance car les DDGS sont utilis\u00e9es pour remplacer d\u2019autres ingr\u00e9dients dans les aliments des animaux d\u2019\u00e9levage –\u00a0\u00e0 savoir […]<\/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":[637,8964,8956,1647,378,626,592],"class_list":["post-8876","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition-et-technologies","tag-formulation-de-lalimentation-animale","tag-hi-gel","tag-installation-de-transformation","tag-mais-extrude","tag-solutions-de-transformation-par-extrusion-fr","tag-transformation-du-mais","tag-transformation-pour-lalimentation-humaine-ou-animale-fr-2"],"acf":[],"yoast_head":"\nLe\u00e7ons tir\u00e9es de la pr\u00e9diction de la qualit\u00e9 des DDGS, 2e partie\u00a0: \u00c9quation de pr\u00e9diction<\/title>\n<meta name=\"description\" content=\"Ceci a de l\u2019importance car les DDGS sont utilis\u00e9es pour remplacer d\u2019autres ingr\u00e9dients dans les aliments des 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