Protein digestive dynamics of meat and bone meals in broiler chickens.

Autor:	Macelline SP; School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW, 2006, Australia.; Poultry Research Foundation, The University of Sydney, Camden, NSW, 2570, Australia., McQuade LR; Australian Proteome Analysis Facility, Macquarie University, Sydney, NSW, 2109, Australia., Mclnerney BV; Australian Proteome Analysis Facility, Macquarie University, Sydney, NSW, 2109, Australia., Moss AF; School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia., Selle PH; Poultry Research Foundation, The University of Sydney, Camden, NSW, 2570, Australia., Liu SY; School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW, 2006, Australia.; Poultry Research Foundation, The University of Sydney, Camden, NSW, 2570, Australia.
Jazyk:	angličtina
Zdroj:	Animal nutrition (Zhongguo xu mu shou yi xue hui) [Anim Nutr] 2020 Dec; Vol. 6 (4), pp. 521-528. Date of Electronic Publication: 2020 Jul 09.
DOI:	10.1016/j.aninu.2020.04.005
Abstrakt:	This study determined the variations in protein digestibilities and digestion rates in broiler chickens offered diets containing 7 different meat and bone meals (MBM). A total of 252 male Ross 308 broiler chickens were offered 7 atypical diets largely based on maize and MBM from 24 to 28 d post-hatch. Each experimental diet was offered to 6 replicates with 6 birds per replicate cage. Excreta were collected in their entirety from 25 to 27 d post-hatch and on 28 d post-hatch. Digesta samples were collected from the proximal jejunum, distal jejunum, proximal ileum and distal ileum. Apparent digestibilities of protein were determined in each segment and apparent digestibilities of amino acids were measured in the distal ileum. There were significant differences in apparent protein digestibility coefficients in the proximal jejunum ( P  = 0.006), where broiler chickens offered the high ash beef meal (diet 7) generated the lowest protein digestibility in the proximal jejunum (0.318). Similarly, there were significant differences in apparent digestibility coefficients in the distal jejunum ( P <  0.001) and distal ileum ( P <  0.001) but not in the proximal ileum. More pronounced differences were found in the disappearance rate of protein and there were significant differences in all 4 segments of the small intestine ( P <  0.001). Broiler chickens offered the high ash beef meal had the lowest protein disappearance rate ( P <  0.001). No difference was observed in the predicted protein digestion rate ( P  = 0.486) but chickens offered the high ash beef meal had the lowest potential digestible protein (0.662, P  = 0.034) whereas the highest potential digestible protein (0.739) was detected in diet 5 (containing a beef meal). This study contributed to the establishment of a preliminary database to include digestion rates of starch and protein into practical diet formulation. Competing Interests: We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the content of this paper. (© 2020 Chinese Association of Animal Science and Veterinary Medicine. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.)
Databáze:	MEDLINE
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