Abstract

The aim of this research was to investigate the effects of lysine and methionine supplements in corn-soybean meal diets for finisher broilers, by comparing their combined and sole effects on performance and carcass characteristics of the birds. Parameters measured were performance (body weight, weight gain, feed intake, feed conversion ratio and mortality), dressed weight, dressing percentage, carcass cuts and internal organs. The experimental diets were: T1 (control) = lysine + Methionine, T2 (sole lysine) and T3 (sole methionine) supplements. Final body weight, weight gain, carcass and carcass cuts were significantly higher in the control (lysine + methionine) than in the sole supplemented diets, while sole supplementation with methionine (T3) produced significant higher values than sole lysine (T2) in the above mentioned parameters The liver was significantly enlarged in the birds that received the sole supplemented diets. Due to the enlarged liver of the birds fed the sole supplemented diets, it was concluded that supplementation with both lysine and methionine is indispensable in corn- soybean meal based diets for finisher broilers. © 2021. All Rights Reserved.