Effects of phytase on the performance and availability of phosphorus in corn-soybean meal diets by young Japanese quails

An one experiment were conducted to evaluate of the effect of supplementing microbial phytase to corn + soybean meal based diets containing different levels of available phosphorus (AP) on the performance and utilization of phosphorus in young Japanese quail. Nine treatments consisting of three levels of AP (0.25, 0.35, 0.45%) and three levels of phytase (0, 0.05, 0.1%) ill 3x3 factorial arrangement were used with ten quails replications per treatment. The research was terminated on 30(th) days old. Phytase supplementation at 0.1% level of diets containing 0.45 and 0.35% AP were significantly increased body weight (p < 0.05), and decreased feed:gain ratio and also improved tibia ash and breaking strength in comparation with control group fed 0.45% AP without phytase. But differences in groups weren't found to be significant. When the diet with 0.25 AF was supplemented phytase, growth rate of quails were positively effected and the results were found to be similar or slightly high than control group, and also feed : gain ratio were improved but differences in groups didn't significant. Bone ash was decreased with 0.25% AP with 0.1% phytase (p < 0.05) but breaking strength of tibia wasn't significantly effected with phytase.