Effects of a high level of phytase on broiler performance, bone ash, phosphorus utilization, and phytate dephosphorylation to inositol

Poultry Science
A E GautierR N Dilger

Abstract

An experiment was conducted to evaluate how the addition of microbial phytase influenced growth performance, bone mineralization, tissue P content, apparent digestibility and retention, and inositol phosphate (IP) concentrations in broilers fed diets with varying mineral matrices from 2 to 23 d of age. At 2 d of age, chicks were randomly allotted to receive 1 of 6 experimental diets arranged as a 3 × 2 factorial of mineral matrix [control diet with 1.0% Ca and 0.5% non-phytate phosphorus (NPP); mineral matrix 1 with 0.84% Ca and 0.35% NPP; and mineral matrix 2 with 0.77% Ca and 0.29% NPP] and phytase supplementation (0 or 1,500 FTU/kg). Feed intake was influenced (quadratic, P = 0.012) by the mineral matrix, but no interaction or main effect of phytase were observed. Phytase increased (P = 0.011) BW gain regardless of the mineral matrix applied. Feed efficiency was not influenced (P > 0.05) by mineral matrix, phytase, or their interaction. Phytase increased bone ash content differentially across matrices (interaction, P < 0.01), and tibia P content was lowest in birds fed matrix 2 and highest in the control (linear, P < 0.05). Concentrations of P in muscle, spleen, and liver were not affected by treatment. An interactive effect...Continue Reading

References

Sep 1, 1990·The British Journal of Nutrition·P C SimonsG J Verschoor
Apr 25, 2003·Poultry Science·R B Shirley, H M Edwards
Jun 23, 2004·Poultry Science·R N DilgerO Adeola
Jun 23, 2004·Poultry Science·F G SilversidesM R Bedford
Dec 1, 2000·Nutrition Research Reviews·P H SelleW L Bryden
Oct 27, 2012·Archives of Animal Nutrition·Katrine PontoppidanAnn-Sofie Sandberg
Feb 26, 2013·Poultry Science·C L WalkA P McElroy
Jul 23, 2013·Poultry Science·O A OlukosiO Adeola

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Citations

Oct 16, 2019·Animal : an International Journal of Animal Bioscience·F Gonzalez-UarquinK Huber
Feb 11, 2020·Poultry Science·Fernando Gonzalez-UarquinKorinna Huber

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