Diferentes níveis nutricionais e de fitase nas dietas para codornas japonesa

Abstract

Were used 588 Japanese quail (Coturnix coturnix japonica) aged 17 to 32 weeks were used to investigate the effects of phytase overdosage on performance, egg quality, and bone mineralization. The study was developed in a factorial scheme (4 doses of phytase, 0, 500, 100 and 1500 FTU / kg of feed and 3 nutritional matrices, Matrix 1 with 100%, Matrix 2 with 95% and Matrix 3 with 90 % of nutritional recommendations), totaling 12 treatments with seven replicates with 12 birds each. Nutritional matrices influenced egg production (P<0.001), egg mass (P<0.001), conversion by egg mass (P<0.001) and conversion per dozen eggs (P<0.001). There was a significant interaction in egg production, and the nutritional reduction of 10% reduced the variable in the diet without phytase (P<0.001), whereas with phytase supplementation (500 FTU, P = 0.56, 1000 FTU, P = 0.57; 1500 FTU, P = 0.15), there was no significant effect. The matrix 1 promoted eggs with the thicker shell (P = 0.027). There was no effect of nutritional matrices on the other egg quality variables (P> 0.05). There was interaction effect (matrix x phytase) on the percentage of albumen (P = 0.0047), diets without nutritional reduction. Nutritional reduction negatively influences quails. Phytase in the diet increases the performance of birds in any evaluated matrix, with better applications in diets with 10% nutritional reduction and a dose of 1166 FTU / kg of feed.