An experiment was conducted to investigate
the effects of phytase and 2 levels of fructooligosaccharide
(FOS) supplementation on growth
performance, bone mineralization, and P utilization of
broiler chickens. A total of 210 day-old male broiler
chickens (Ross)were randomly placed into 7 dietary
treatments consisting of 6 replicates with 5 birds per
pen.The experiment was designed as an augmented
2 × 3 factorial arrangement with 0 or 500 U/kg of phytase
and 0, 0.5% or 1% of FOS added to a reduced Ca
(0.8%) and available P (0.25%) negative control diet
(NC). A positive control diet (PC) that contained 1%
Ca and 0.45% available P was also included. During the
entire experimental period, phytase supplementation
significantly improved