The objective of this experiment was to evaluate the effects of dietary crude protein (CP) level reduction of ration formulated according to ideal protein concept and with supplementation of industrial amino acids on the performance and yield of noble cuts of broilers from 22 to 42 days of age kept under thermoneutral conditions. It was used 280 “Cobb” male broilers with initial weight of 856 ± 6.48 g, distributed in a completely randomized experimental design, with five treatments (21.6; 20.6; […]

Two trials were conducted to evaluate the requirements of increasing dietary digestible lysine levels, maintaining or not the amino acids relation, for broilers from 1 to 21 days old, on thermoneutral environment. A complete randomized experimental design was used in both trials. In trial 1, broilers were allotted to five treatments (0.92, 0.98, 1.04, 1.10, and 1.16% digestible lysine levels, conventional diet), with eight replicates of ten birds. In trial 2, chicks were allotted to four treatments (1.04, 1.10, 1.16, […]

ABSTRACT – This experiment was carried out to evaluate the requirement of crude protein for initial growing crossbred barrows (Landrace x Large White), from 15 to 30 kg, maintained in thermal comfort. During the experimental period, the room temperature was maintained at 23.1±1.19°C, with relative humidity at 80.6±4.59% and Black Globe Index Humidity at 69.8±1.38. Sixty crossbred barrows with initial average weight of 14.8±0.85 kg and final weight of 29.3±2.4 2kg, were used. A completely randomized blocks design, with five […]