Desempenho de cordeiros em terminação alimentados com dietas contendo coproduto de caju tratado ou não quimicamente com uréia

Abstract

This study aimed to evaluate the intake (g/day, per unit metabolic size – UMS, percentages of weight alive) of dry matter (DM), organic matter (OM), crude protein (CP) and neutral detergent fiber (NDF), alimentary conversion, daily weight gain, carcass, commercial cuts and viscus yield and the economical viability of termination of lambs that received experimental isoenergetics and isoproteics diets having growing levels of cashew by-product urea amonized or not urea amonized. Twenty four lambs were distributed in randomly delineation factorial project 4 X 2 with four levels of inclusion (6; 11; 16; 21%) of treat cashew co-product (CCTQ) or not (CCNT) with urea, hay of Aruana grass (Panicum maximum cv. Aruana), maize and cottonseed cake, resulting in eight experimental treatments, with three replications for treatment. The urea amonization didn’t affect the DM, OM and NDF intakes. The diets having higher levels of cashew by-product inclusion provided a larger OM intake, in %WA and g/UMS. The CP intake, in %WA and g/UMS, was larger for animals that consumed CCTQ. The levels of inclusion and with or without cashew by-product chemical treatment didn’t interfere on the slaughter weight, daily weight gain and alimentary conversion of that animals. On the carcass and viscus properties, levels of cashew by-product inclusion affected in the loin weight and yields in leg, loin, neck, rib and breathing system. The heart yield was superior for that animals that consumed CCTQ. On the economical evaluation, the diet that contained 21% of CCTQ provided larger net value and better costbenefit relation