The effect of dietary calcium inclusion on broiler gastrointestinal pH: quantification and method optimization

Morgan, N.K., Walk, C.L., Bedford, M.R. and Burton, E.J. ORCID: 0000-0003-2784-6922, 2014. The effect of dietary calcium inclusion on broiler gastrointestinal pH: quantification and method optimization. Poultry Science, 93 (2), pp. 354-363. ISSN 0032-5791

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Abstract

There is little consensus as to the most appropriate methodology for the measurement of gastrointestinal pH in chickens. An experiment was conducted to establish the optimum sampling method for the determination of broiler digesta pH in birds fed differing levels of dietary calcium. Ross 308 broilers (n = 60) were fed one of two experimental diets, one containing 0.8% monocalcium phosphate and 2% limestone and one containing 0.4% monocalcium phosphate and 1% limestone. Four factors were investigated to determine the most appropriate method of measuring broiler gastrointestinal digesta pH: removal from the tract, prolonged air exposure, altering the temperature of the assay, and controlling the water content of the digesta. The conditions were assessed at bird ages from 7 to 42 d post hatch. Dietary Ca content had no significant effect on in situ pH, but it contributed towards variance in ex situ pH of both gizzard and duodenum digesta.

Item Type:	Journal article
Publication Title:	Poultry Science
Creators:	Morgan, N.K., Walk, C.L., Bedford, M.R. and Burton, E.J.
Publisher:	Oxford University Press on behalf of the Poultry Science Association
Date:	2014
Volume:	93
Number:	2
ISSN:	0032-5791
Identifiers:	Number Type 10.3382/ps.2013-03305 DOI
Divisions:	Schools > School of Animal, Rural and Environmental Sciences
Record created by:	EPrints Services
Date Added:	09 Oct 2015 10:59
Last Modified:	09 Jun 2017 13:46
URI:	https://irep.ntu.ac.uk/id/eprint/21226

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