Abstract: This study was carried out to investigate the use of different levels of phytase enzyme supplementation on the growth performance, carcass yield, oxidative stress, faecal phosphorus and biochemical parameters of Japanese quails. Total of 220 Japanese quails (Coturnix coturnix japonica) at three-day old age were used. The birds were randomly assigned to one control and three experimental groups based on their initial body weight, comprising five replicates with 11 birds each. They were fed a basal diet (Control) or the basal diet supplemented with either 500 FTU kg 1 (Group I), 750 FTU kg 1 (Group II) or 1000 FTU kg 1 (Group III) of microbial phytase (Peniophora lycii, containing 500 FTU kg 1 phytase activities). As a result, phytase supplementation to diets of quails didn`t affect growth performance and oxidative stress parameters (p>0.05); however, it decreased faecal phosphorus content (p< 0.05) and serum potassium level (p< 0.01) and increased triglycerides and serum VLDL levels (p< 0.05).
N. Denek , O. Kaplan , M. Avci and A. Can , 2007. Effects of Microbial Phytase on Growth Performance, Carcass Yield, Biochemical Parameters, Oxidative Stress and Faecal Phosphorus Content of Japanese Quails . Journal of Animal and Veterinary Advances, 6: 1031-1035.