An trial was conducted to determine the best electrolyte balance (EB) for broilers from 1 to 42 days old. In the first phase of the experiment 2,112 Ross chicks male were reared in the floor covered with shaving woods and fed two corn-soybean meal based diet: one with 20 and one with 23% of crude protein (CP) combined with 0; 50; 100; 150; 200; 250; 300 and 350 mEq/kg of EB. In the growing phase, 1,728 broilers of the total, […]

Two experiments were conducted with the objective of evaluating the lysine requirements for Ross broilers, males, from 22 to 42 and 43 to 49 days old, maintaining 71% met + cys:lys ratio. Nine hundred broilers averaging initial body weight of 780 g at 22 days old and 2.556 g at 43 days old were used in each experiment and allotted to a completely randomized experimental design, with six treatments, six replicates and 25 birds by experimental unit. The treatments consisted […]

Two hundred and forty male broilers of Ross strain, with initial weight of 43 ± 0.2 g, from 1 to 49 days of age, were maintained under thermal comfort (24.2 ± 3.52oC). A completely randomized design with four nutrition plans was used: NP1 (1.1, 1.0, and 0.85% de total lysine); NP2 (1.2, 1.1, and 0.95% de total lysine); NP3 (1.3, 1.2, and 1.05% of total lysine); and NP4 (1.4, 1.3, and 1.15% de total lysine), respectively for the periods from […]