{"id":13506,"date":"2019-11-14T04:00:04","date_gmt":"2019-11-14T10:00:04","guid":{"rendered":"https:\/\/www.insta-pro.com\/?p=13506"},"modified":"2019-11-14T04:00:04","modified_gmt":"2019-11-14T10:00:04","slug":"tourteaux-de-soja-extrude-a-sec-avec-haut-cisaillement-pour-vaches-laitieres-quel-est-leffet-sur-le-gras-du-lait","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/nutrition-et-technologies\/tourteaux-de-soja-extrude-a-sec-avec-haut-cisaillement-pour-vaches-laitieres-quel-est-leffet-sur-le-gras-du-lait\/","title":{"rendered":"Tourteaux de soja extrud\u00e9 \u00e0 sec avec haut cisaillement pour vaches laiti\u00e8res\u00a0: quel est l\u2019effet sur le gras du lait\u00a0?"},"content":{"rendered":"<p>Dans la production de lait de vache, la quantit\u00e9 totale de lait produit quotidiennement pour chaque animal a son importance, mais l\u2019essentiel, c\u2019est sa <a href=\"https:\/\/extension.psu.edu\/milk-components-understanding-milk-fat-and-protein-variation-in-your-dairy-herd\">composition<\/a>, notamment sa teneur en gras et en prot\u00e9ines.\u00a0 Les nutritionnistes formulant les rations des vaches laiti\u00e8res ont souvent pour objectif de maximiser la quantit\u00e9 de graisses pr\u00e9sentes dans le lait produit au quotidien.<\/p>\n<p>Souvent, des ingr\u00e9dients soja by-pass sont utilis\u00e9s pour ajouter davantage de <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/quality-ingredients-for-dairy-producers-results-in-improved-efficiency\/\">prot\u00e9ines by-pass<\/a> (digestibles dans l\u2019intestin gr\u00eale) au r\u00e9gime de la vache, afin de stimuler la production de lait.\u00a0 Ces ingr\u00e9dients contiennent souvent de l\u2019huile r\u00e9siduelle, et d\u2019autres ingr\u00e9dients apportent des mati\u00e8res grasses (y compris des graisses ou huiles isol\u00e9es)\u00a0; la quantit\u00e9 totale de ces mati\u00e8res grasses dans l\u2019alimentation est calcul\u00e9e et contr\u00f4l\u00e9e.<\/p>\n<p>Il est important de comprendre les m\u00e9canismes par lesquels les graisses et huiles ajout\u00e9es, y compris celles pr\u00e9sentes dans les ingr\u00e9dients soja by-pass, impactent la production de gras dans le lait des vaches laiti\u00e8res.<\/p>\n<p>J\u2019ai \u00e9tudi\u00e9 des donn\u00e9es tir\u00e9es d\u2019\u00e9tudes soigneusement contr\u00f4l\u00e9es (voir <a href=\"https:\/\/www.researchgate.net\/scientific-contributions\/2054356917_Mike_Socha\">ici<\/a>, <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0022030215005044\">ici<\/a> et Dhiman, 2001) consistant \u00e0 donner \u00e0 des vaches laiti\u00e8res du tourteau de <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/using-dry-extruded-whole-soybeans-extruded-full-fat-in-formulations\/\">soja non d\u00e9shuil\u00e9 extrud\u00e9 \u00e0 sec avec cisaillement \u00e9lev\u00e9<\/a> ou du tourteau de soja <a href=\"https:\/\/www.insta-pro.com\/en\/blog\/nutritionandtechnologies\/properly-processed-express-soy-meal-maintains-high-digestibility-greater-metabolizable-energy\/\">ExPress\u00ae<\/a> (obtenu par extrusion \u00e0 sec avec pressage pour une extraction partielle de l\u2019huile), afin de d\u00e9terminer comment cela\u00a0:<\/p>\n<ul>\n<li>enrichissait en mati\u00e8res grasses le r\u00e9gime des vaches<\/li>\n<li>affectait le pourcentage de mati\u00e8res grasses dans le lait<\/li>\n<li>affectait la quantit\u00e9 totale de gras dans le lait produit chaque jour<\/li>\n<\/ul>\n<p>Les donn\u00e9es sont r\u00e9sum\u00e9es ci-dessous\u00a0:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13488\" src=\"https:\/\/www.insta-pro.com\/wp-content\/uploads\/2019\/11\/chart1.png\" alt=\"Mati\u00e8res grasses issues du soja extrud\u00e9 \u00e0 sec avec fort cisaillement dans le r\u00e9gime alimentaire\" width=\"774\" height=\"453\" srcset=\"https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart1.png 774w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart1-300x176.png 300w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart1-768x449.png 768w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart1-615x360.png 615w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart1-750x439.png 750w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart1-564x330.png 564w\" sizes=\"auto, (max-width: 774px) 100vw, 774px\" \/><\/p>\n<p><strong>Figure 1.\u00a0 Une quantit\u00e9 de mati\u00e8res grasses sup\u00e9rieure dans les tourteaux de soja extrud\u00e9 \u00e0 sec avec haut cisaillement n\u2019affectait que tr\u00e8s peu le rendement quotidien en gras du lait.<\/strong><\/p>\n<p>Comme le montre la figure 1, l\u2019ajout de tourteaux de soja extrud\u00e9 \u00e0 sec avec cisaillement \u00e9lev\u00e9 dans les rations de vaches laiti\u00e8res, dans des quantit\u00e9s standard \u00e0 \u00e9lev\u00e9es, n\u2019avait que peu \u2013 voire pas \u2013 d\u2019effet sur la production de gras dans le lait.\u00a0 Dans ces \u00e9tudes, les pourcentages de gras dans le lait se situaient entre 2,91\u00a0% et 3,42\u00a0%.<\/p>\n<p>Il est \u00e9galement important, lorsque l\u2019on augmente les quantit\u00e9s totales de graisses dans l\u2019alimentation (y compris les apports des tourteaux de soja extrud\u00e9) de prendre en compte l\u2019effet sur le gras du lait.\u00a0 Que se passe-t-il lorsqu\u2019on accro\u00eet la quantit\u00e9 totale de mati\u00e8res grasses dans l\u2019alimentation\u00a0?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13492\" src=\"https:\/\/www.insta-pro.com\/wp-content\/uploads\/2019\/11\/chart2.png\" alt=\"Quantit\u00e9 totale de mati\u00e8res grasses dans l\u2019alimentation\" width=\"774\" height=\"453\" srcset=\"https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart2.png 774w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart2-300x176.png 300w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart2-768x449.png 768w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart2-615x360.png 615w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart2-750x439.png 750w, https:\/\/instapro.spinuhost.com\/wp-content\/uploads\/2019\/11\/chart2-564x330.png 564w\" sizes=\"auto, (max-width: 774px) 100vw, 774px\" \/><\/p>\n<p><strong>Figure 2.\u00a0 En augmentant la quantit\u00e9 totale de mati\u00e8res grasses dans l\u2019alimentation, au-del\u00e0 du seuil d\u2019environ 1,5\u00a0kg\/vache\/jour, le rendement en gras du lait diminue.<\/strong><\/p>\n<p>Comme l\u2019indiquent les donn\u00e9es de la figure 2, si l\u2019on accro\u00eet la quantit\u00e9 totale de mati\u00e8res grasses dans l\u2019alimentation, il s\u2019av\u00e8re que cela fera baisser la production de mati\u00e8res grasses dans le lait.<\/p>\n<p>Par cons\u00e9quent, comme l\u2019indiquent les donn\u00e9es de ces trois \u00e9tudes soigneusement contr\u00f4l\u00e9es, les tourteaux de soja extrud\u00e9 \u00e0 sec avec haut cisaillement peuvent \u00eatre int\u00e9gr\u00e9s avec beaucoup de succ\u00e8s aux r\u00e9gimes alimentaires des vaches laiti\u00e8res.\u00a0 En parall\u00e8le, il convient de contr\u00f4ler la quantit\u00e9 totale de mati\u00e8res grasses dans l\u2019alimentation afin d\u2019\u00e9viter une baisse de la production de gras du lait.<\/p>\n<p><strong><em>R\u00e9f\u00e9rence<\/em><\/strong><\/p>\n<p>Dhiman, T.R., 2001. Influence des techniques de production du tourteau de soja sur le rendement des vaches.\u00a0 Rapport de recherche de l\u2019Universit\u00e9 d\u2019\u00c9tat de l\u2019Utah<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans la production de lait de vache, la quantit\u00e9 totale de lait produit quotidiennement pour chaque animal a son importance, mais l\u2019essentiel, c\u2019est sa composition, notamment sa teneur en gras et en prot\u00e9ines.\u00a0 Les nutritionnistes formulant les rations des vaches laiti\u00e8res ont souvent pour objectif de maximiser la quantit\u00e9 de graisses pr\u00e9sentes dans le lait [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":12398,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7181],"tags":[5843,8199,774],"class_list":["post-13506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition-et-technologies","tag-production-de-lait-de-la-vache-laitiere","tag-gras-du-lait","tag-extruded-soy-fr"],"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>Tourteaux de soja extrud\u00e9 \u00e0 sec avec haut cisaillement pour vaches laiti\u00e8res\u00a0: quel est l\u2019effet sur le gras du lait\u00a0? - Insta-Pro<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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