The effects of adding tallow (T), poultry visceral oil (PVO), degummed soybean oil (DSO), and a mixture of T + PVO and T + DSO in different proportions in diets for broiler chickens were evaluated. The treatments were defined according to the lipid sources (LS) and their mixtures added to the diets and also according to the proportion of metabolizable energy (ME) originated from each LS (25, 50, and 75% of ME for each LS added to the feed). The experimental design was completely randomized. There were no differences (P>0.05) between treatments for body weight and food intake. Feed conversion (CA) of birds fed diets containing DSO and DSO + T (75 and 25% of ME) were lower than those chickens that were fed the diets with PVO and T (50 and 50% of ME); but showed similar results (P>0.05) to chickens of other treatments. The values found for abdominal fat and yield and composition of carcass were not affected by LS (P>0.05). It was concluded that the use of different lipid sources in diets for broiler chickens has no effect on performance and yield and carcass composition.
broiler chicken; lipid source; performance; yield; carcass composition
