Mineral-nitrogen supplementation to finishing Nellore steers in deferred pasture.

The objective of this study was to evaluate the effects of two protein levels in mineral-protein-energy supplements on the productivity and economic performance of Nellore steers. Ninety animals weighing 382.35±32.95 kg on average, were treated with mineral-nitrogen supplements containing 30% crude proteins (CP; 75% ground maize, 8.91 % urea and 16.09% mineral) and 40% CP (66.67 % ground maize, 11.90% urea, and 21.43% mineral). The animals were housed in two paddocks of Uruchloa brizantha ?MG-5? (syn. Brachiaria brizantha) and were weighed at the beginning, at 45 days, and at 94 days of the experiment, when they were slaughtered at an average weight of 451±35.38 kg. Objetivou-se avaliar o efeito de dois teores de proteina bruta no suplemento mineralnitrogenado para terminacao de novilhos Nelore. Foram utilizados 90 animais, com peso medio inicial de 382,35±32,95 kg, submetidos a dois tratamentos: suplemento com 30% de proteina bruta (75% de milho, 8,91% ureia e 16,09% mineral) e 40% de proteina bruta (66,67% de milho, 11,90 % ureia e 21,43% mineral).