Effect of Strain and Finisher Diet Non-Phytate Phosphorus Level on Performance and Litter Composition in Large Tom Production
Abstract:
Sustainable practices relative to manure nutrient content are
essential to commercial turkey production due to the perception that land application
of poultry manure is a primary contributor to watershed eutrophication. The
objective of our research was to determine the effect of finisher diet non-phytate
phosphorus (nPP) levels on large tom performance and litter composition. Two
experiments of similar concept were conducted and each experiment was a 2x2
factorial arrangement of treatments utilizing two commercial strains and two
levels of dietary nPP (normal and low). In Experiment 1, dietary nPP was reduced
during the last finisher diet [Normal (0.37) and Low (0.31)]. In Experiment
2, dietary nPP was reduced in the last 2 finisher diets [Normal (0.58) and Low
(0.55) in the Finisher 1 diet and Normal (0.40) and Low (0.38) in the Finisher
2 diet]. Performance measurements were recorded from d 1-136 and d 1-126 in
Exp 1 and 2, respectively and litter phosphorus (P) levels were determined.
In Exp 1, both strains had similar ending weight (EW) and Strain B had an improved
feed conversion ratio (FCR). There were no differences in performance or litter
P due to nPP level, indicating the potential to decrease feed cost but not environmental
impact. In Exp 2, Strain A had greater EW but increased FCR compared to Strain
B. Regression equations that standardized strain EW predicted a decreased time
of production and FCR for Strain A. The lower nPP level applied in both finisher
diets decreased total litter P (p<0.065).
How to cite this article
A.M. Evans, B.N. Swiger, K.P. Blemings, M.S. Lilburn and J.S. Moritz, 2014. Effect of Strain and Finisher Diet Non-Phytate Phosphorus Level on Performance and Litter Composition in Large Tom Production. International Journal of Poultry Science, 13: 246-252.
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