Energy Utilization by Chickens Fed Various Levels of Balanced Methionine

The present study investigated the effect of various methionine and metabolisable energy (ME) levels on carcass characteristics and visceral organs of broiler chickens. A total of 400 broiler chickens (Lohman) were allocated in completely random design by arrange of factorial 2×2 (4 replicates and 25 birds in each). The levels of 1.2 and 0.45 % methionine adjusted to 2800 and 3200 kcal/kg ME in starter and 0.9, 0.33% to 2800 and 3200 kcal/kg ME in grower periods, respectively. On 21 and 42 days of age two birds were slaughter and tested. The most parameters were differently affected by all treatments. The highest carcass percentage was obtained by low levels of methionine at 42 days of age (P 0.05). The results of current study have shown that different ME and methionine interactions can reflect in external (carcass traits) and internal (visceral organs) traits.