Effects of Phytase Superdosing on Digestibility and Bone Integrity of Broilers

• DOI: 10.3382/japr/pfz001
• Publication Date: 2019-03-27T22:14:00Z
• Authors: J.I.M. Fernandes; D. Horn; E.J. Ronconi; R. Buzim; F.K. Lima; D.A. Pazdiora
• Keywords: Phytase; Completely randomized design

The effects of phytase superdosing on digestibility and bone development broilers from 1 to 21 d age were evaluated. Ninety-six male the Cobb Slow lineage housed in metaboilic cages, distributed a completely randomized design with 4 treatments 8 replicates. positive control without phytase, negative (500 FTU), (1000 (2000 FTU). From 16 age, total excreta samples collected for analyses. To evaluate quality at 2 per experimental unit slaughtered femur tibia collected. Data analyzed by regression test. A quadratic effect inclusion diameter percentage Ca P was observed, which 1,494 1,220 FTU, respectively, showed best results. For evaluation tibia, diameter, length weight linearly increased resistance 1265 FTU inclusion. Regarding digestibility, EEDC (Ether extract coefficient), MMDC (mineral matter AME (Apparent metabolizable energy), AMEn (Nitrogen-corrected apparent energy) 1,734; 788; 1,204; 1,255 resulted highest values, respectively. Phytase improved broiler d.