True ileal calcium digestibility in soybean meal and canola meal, and true ileal phosphorous digestibility in maize-soybean meal and maize-canola meal diets, without and with microbial phytase, for broiler growers and finishers

British Poultry Science
V RavindranMichael R Bedford

Abstract

1. Published data on the ileal Ca digestibility in soybean meal (SBM) and canola meal (CM), and the effect of microbial phytase on the Ca digestibility of these ingredients are limited. Therefore, two experiments were conducted, with the primary objective of determining the true ileal digestibility of calcium (Ca) in SBM and CM, without and with microbial phytase, during broiler grower (Experiment 1) and finisher (Experiment 2) periods. A secondary objective was to investigate the influence of microbial phytase on the true ileal digestibility of phosphorus (P), apparent digestibility of nitrogen (N) and minerals, and phytate disappearance in maize-SBM and maize-CM diets. Six experimental diets based on SBM and CM, with three phytase doses (0, 500 and 2000 FTU/kg), were fed to broilers from day 18 to 21 (Experiment 1) or 39 to 42 (Experiment 2) post-hatch. A Ca- and P- free diet, with no added phytase, was also developed to determine the endogenous Ca and P losses. Titanium dioxide was incorporated in all diets as an indigestible indicator. Each experimental diet was randomly allocated to six replicate cages (eight birds per cage). Apparent ileal digestibility was calculated using the indicator method and the true ileal digestib...Continue Reading

References

Apr 25, 2003·Poultry Science·R B Shirley, H M Edwards
Dec 1, 2000·Nutrition Research Reviews·P H SelleW L Bryden
Dec 22, 2009·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·K BlaabjergH D Poulsen
Nov 5, 2014·Journal of Animal Science·R K MutucumaranaA J Cowieson
Oct 17, 2015·Journal of Animal Science and Technology·Samiru Sudharaka WickramasuriyaJung Min Heo

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