Starch digestion rates in multiple samples of commonly used feed grains in diets for broiler chickens

Peter H Selle; Amy F Moss; Ali Khoddami; Peter V Chrystal; Sonia Yun Liu

doi:10.1016/j.aninu.2020.12.006

Starch digestion rates in multiple samples of commonly used feed grains in diets for broiler chickens

Anim Nutr. 2021 Jun;7(2):450-459. doi: 10.1016/j.aninu.2020.12.006. Epub 2021 Mar 27.

Authors

Peter H Selle^{1

2}, Amy F Moss³, Ali Khoddami^{1

4}, Peter V Chrystal^{1

5}, Sonia Yun Liu^{1

6}

Affiliations

¹ Poultry Research Foundation, The University of Sydney, Camden, NSW, 2570, Australia.
² Sydney School of Veterinary Science, The University of Sydney, Sydney, NSW, 2006, Australia.
³ School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia.
⁴ Sydney Institute of Agriculture, Faculty of Science, The University of Sydney, Sydney, NSW, 2006, Australia.
⁵ Baiada Poultry Pty Limited, Pendle Hill, NSW, 2145, Australia.
⁶ School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW, 2006, Australia.

Abstract

In this study the starch digestion rates in broiler chickens from 18 samples of 5 commonly used feed grains (sorghum, wheat, maize, barley, triticale) were determined. The methodology to determine starch digestion rates in poultry is detailed herein. Starch digestion rates were not significantly different (P = 0.128) across the 18 feed grains, which reflects the wide variations that were observed within a given feedstuff. Nevertheless, starch digestion rates in broiler chickens offered wheat-based diets were significantly more rapid by 56.0% (0.117 versus 0.075 min^-1; P = 0.012) than their sorghum-based counterparts on the basis of a pair-wise comparison. In descending order, the following starch digestion rates were observed: wheat (0.117 min^-1), barley (0.104 min^-1), triticale (0.093 min^-1), maize (0.086 min^-1), sorghum (0.075 min^-1). The implications of these findings are discussed as they almost certainly have implications for poultry nutrition and the development of reduced crude protein diets for broiler chickens.

Keywords: Broiler chicken; Digestive dynamics; Feed grain; Starch.