Dietary ractopamine promotes growth, feed efficiency and carcass responses over a wide range of available lysine levels in finisher boars and gilts.

The article discusses the results of a study on the effect of the level of lysine and dietary ractopamine hydrochloride (RAC) on the growth, feed efficiency and carcass responses in finisher boars and gilts. The study reveals that 0.56 gram of lysine is sufficient to maximize average daily gain (ADG), feed conversion ratio (FCR) and carcass weight in gilts while ADG and FCR in boars were not limited by the lysine energy ratios. It also explains the responses of dietary RAC in ADG and FCR.