Desempenho técnico e econômico de distintos sistemas de produção para terminação de gado de corte em confinamento

Abstract

Feedlot performances of 20,355 animals from seven different farms during 2003, 2004 and 2005 years were used to evaluate technical and economic efficiencies of 15 genetic groups. Performance results, cost, income and profit were analyzed according to a model including fixed effects of genetic group/animal category and initial live body weight as a covariate. Means were compared using SNK test (p<.05). Profit sensitivity analyses of price variation for animal selling and purchasing prices, forages and the main foodstuff of the concentrate diet were performed. All farms showed positive net profit and farms 2 and 3 during 2003 year, and farms 4, 5 and 6, showed favorable economic profit. The best genetic groups/animal category were Nellore males for farm 1, males with high genetic percentage of Nellore breed ( Nellorado) in 2003 and Nellorado castrate animal in 2004 for farm 2, Nellore cows for farm 3 during 2003 year, Nellorado cows during 2004 year, and males from crosses between different zebu males and Holstein females for farm 4. And ½ Red Angus ½ Nelore bulls for farm 7. All the early mature genetic groups for farms 5 and 6 showed similar performances and economic efficiencies. Less sensitivity to price variation was observed for genetic groups showing higher economic or net profit.