Impact of phase-feeding on the growth performance of broilers subjected to high environmental temperatures

摘要: Experiments were conducted to evaluate the effects of phase feeding (PF) on broilers subjected heat stress during grower and finisher periods. Birds fed diets containing lysine, sulfur amino acid (SAA), or threonine levels based NRC (1994) recommendations predictions from linear regression equations (PF). With PF, switched every other day, resulting in steadily decreasing SAA, levels. In Experiment 1 (42 56 d), growth performance was unaffected (P > 0.05) by diet, cost per kilogram weight gain did not differ between treatments. 2 (23 42 d) 3 63 birds housed environmental chambers high (15 h at 35 C, 9 23.9 C) normal (23.9 temperatures. both experiments, reduced PF relative NRC-based diets, with exception feed efficiency, which < under temperatures 2. Data indicated that dietary may be day a program without adversely affecting carcass yield exposed Cost analysis savings might available temperature conditions.