This work was carried out with the objective to evaluate the effect of the nutrition plane (NP) and sex (S) on carcass yield of 576 meat type quails, distributed in the completely randomized design in factorial arrangement 9 X 2 (NP X S), that resulted in 18 treatments with four replicates of eight quails. The NP evaluating from 1 to 21 and from 22 to 42 days of age were: NP1 = 28% CP, 1.5% of lysine (L) and 1.1% of metionine+cystine (MC), and 24% of CP, 1.3% L and 0.9% MC; NP2 = 25.2% CP, 1.23% L and 0.83% MC, and 21.6% CP, 1.0% L and 0.74% MC; NP3 = 22,4% CP, 1.2% L and 0.71% MC, and 19.2% PB, 0.95% L, 0.64% MC; NP4 = NP2+L; NP5 = NP3+L; NP6 = NP2+MC; NP7 = NP3+MC; NP8 = NP2+L+MC and NP9 = NP3+L+MC. The supplementations with industrial sources of Lys and Met+Cys were donne to guarantee levels similar of these amino acids in the diets when the protein was reduced (from NP4 to NP9). There were interactions of NP with the sex for the live weight, carcass weight, breast and drumstick. From 1 to 21 days of age recommended 22.4% of CP, 1.2% of lysine and 1.1% of sulfurous amino acids (SAA), and from 22 to 42 days old should be 19.2% of PB, 0.95% of lysine and 0.9% of SAA.
carcass evaluation; european quails; nutritional requirements
