The experimentwas conducted to determine the energy values of 12 feeds for Japanese quails.Two hundred and eighty quails averaging 19 weeks old were submitted to the methodof total feces collection as a randomized block design, with ten quails perexperimental unit. The experimental period lasted 32 days, divided into fourtrials of eight days each, where two groups of feeds were studied (protein andenergetic), with five replicates each: protein of animal origin (meat and bonemeal, fish meal and feather and viscera meal) and plant (soybean meals 1 and2), as well as energetic feeds of plant origin (millet, sorghum and whole ricebran) and oil and fats (refined soybean oil, poultry fat, beef tallow and swinefat). The feeds replaced the reference diet (corn, soybean meal-based diet),as-fed, in 20% (protein of animal origin), 30% (protein of plant origin), 40%(energetic of plant origin) and 10% (oil and fats). The values of apparent metabolizableenergy (AME), true (TME), AME and TME corrected by nitrogen balance (AMEn andTMEn), as well as the metabolization coefficients of gross energy (MGEC) werethe analyzed variables. The protein sources, with the exception of feather andviscera meal, had values of AMEn higher than those of the Brazilian tables forpoultry and swine, meat and bone meal showed the greatest MGEC (74.06%), whilefeather and viscera meal, the lowest (56.24%). The energetic feeds, with exceptionof sorghum, showed higher values of AMEn than those cited by the Brazilian tablesfor poultry and swine, and both refined soybean oil and swine fat had the highestMGEC (95.81% and 93.32%, respectively), while whole rice bran, the lowest (61.13%).
