Desempenho, custos de produção e características de carcaça de cordeiros em pastagens tropicais recebendo suplementação concentrada

Abstract

The study aimed to evaluate the effect of concentrate supplementation level on grass Panicum maximum cv. Aruana and Brachiaria brizantha cv. Marandu on performance, economic analysis and carcass characteristics of lambs. Thirty-six Suffolk lambs uncastrated male animals were used, with average body weight of 22.54 ± 2.72 kg, spread over three levels of concentrate (0, 1.5 and 3%) and two types of pasture (Aruana and Marandu). The supplement used comprised ground beans of soybean, oats and maize. The data variance analysis did not show a significant interaction between the levels of supplementation and type of pasture on the mass of forage production. There was interaction between supplementation levels and type of pasture on the total consumption of dry matter and crude protein intake. It was observed that the lambs were supplemented showed higher weight gain and better feed conversion in both pastures. Supplementation allowed reaching slaughter weight earlier with higher gross profit for lambs with 1.5% concentrate for Aruana grass. It was found that the lambs were supplemented showed higher weights and yields of carcass cuts. It is concluded that termination of lambs on tropical pasture with supplementation has improved production and economic results regardless of pasture.