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Initial assessment of protein and amino acid digestive dynamics in protein-rich feedstuffs for broiler chickens.
Toghyani, M; McQuade, L R; Mclnerney, B V; Moss, A F; Selle, P H; Liu, S Y.
Afiliación
  • Toghyani M; School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW, Australia.
  • McQuade LR; Poultry Research Foundation, The University of Sydney, Camden, NSW, Australia.
  • Mclnerney BV; Australian Proteome Analysis Facility, Macquarie University, Sydney, NSW, Australia.
  • Moss AF; Australian Proteome Analysis Facility, Macquarie University, Sydney, NSW, Australia.
  • Selle PH; School of Environmental and Rural Science, University of New England, Armidale, NSW, Australia.
  • Liu SY; Poultry Research Foundation, The University of Sydney, Camden, NSW, Australia.
PLoS One ; 15(9): e0239156, 2020.
Article en En | MEDLINE | ID: mdl-32970742
A study evaluating apparent digestibilities of protein and amino acids and their corresponding digestion rates in four small intestinal sites in broiler chickens was completed to further investigate dietary optimisation via synchronised nutrient digestion and absorption. A total of 288 male Ross 308 broiler chickens were offered semi-purified diets with eight protein-rich feedstuffs, including; blood meal (BM), plasma protein meal (PPM), cold pressed (CCM) and expeller-pressed (ECM) canola meal, high (SBM HCP) and low (SBM LCP) crude protein soybean meals, lupins and peas. Diets were iso-caloric, iso-nitrogenous and the test ingredient was the sole source of dietary nitrogen. Each diet was offered to 6 bioassay cages with 6 birds per cage from day 21 to 28 post hatch. On day 28, all birds were euthanized and digesta samples were collected from the proximal jejunum, distal jejunum, proximal ileum and distal ileum to determine apparent protein and amino acids digestibility coefficients, digestion rates and potential digestible protein and amino acids. Dietary protein source significantly influenced energy utilisation, nitrogen retention, apparent protein (N) digestibilities, digestion rates and potential digestible protein along the small intestine. Diets containing BM and SBM LCP exhibited the highest protein digestion rate and potential digestible protein, respectively. Digestibility coefficients and disappearance rates of the majority of amino acids in four sections of the small intestine were influenced by dietary protein source (P < 0.01) and blood meal had the fastest protein digestion rate. In general, jejunal amino acid and protein digestibilities were more variable in comparison to ileal digestibilities, and the differences in protein and amino acid disappearance rates were more pronounced between types of feedstuffs than sources of similar feedstuffs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas en la Dieta / Pollos / Aminoácidos / Alimentación Animal / Crianza de Animales Domésticos Límite: Animals Idioma: En Revista: PLoS One Asunto de la revista: CIENCIA / MEDICINA Año: 2020 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas en la Dieta / Pollos / Aminoácidos / Alimentación Animal / Crianza de Animales Domésticos Límite: Animals Idioma: En Revista: PLoS One Asunto de la revista: CIENCIA / MEDICINA Año: 2020 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos