Effect of cage density and metabolizable energy level of the diet on performance of Japanese quails

Abstract

This experiment was conducted to evaluate the effect of cage density and metabolizable energy levels on the diets on Japanese quails (Coturnix coturnix japonica) performance and egg characteristics. Three hundred and twelve Japanese quails were raised in cages (33 x 23 x 16 cm) and were used a completely randomized design with twelve treatments and four replicates, respectively. A 4 x 3 factorial arrangement was used with four cage densities (94, 9; 108, 4; 126, 5 e 151, 8 cm2/bird) and three energy levels (2,750; 2,900 and 3,050 kcal ME/kg). Cage density and the interaction between the two factors did not affect significantly the performance of birds or egg characteristics. However, diet with the highest level of metabolizable energy significantly reduced feed intake and increased egg density and egg shell percentage. The other variables related to bird performance and egg characteristics were not affected by dietary energy levels used. A cage density of 94.89 cm2/bird and diets containing 2,750 kcal ME/kg can be recommended for Japanese quails during the laying period. There were no adverse effects on bird performance or egg characteristics.