Individual feed intake and performance of finishing steers on ryegrass pasture supplemented with increasing amounts of corn using an automated feeding system

•Beef production in subtropical areas is mainly based in extensive grazing systems.•What is the impact of increasing levels of corn on performance in finishing steers?•Highest forage intake was observed in steers supplemented at 0.4% BW.•Lowest average daily gain was observed in steers supplemented at 0.1% BW.•Corn supplementation from 0.6% to 0.8% BW improves performance and carcass variables.