Desempenho Produtivo de Bovinos Machos Mestiços de Origem Leiteira ou Nelore Submetidos a Diferentes Condições Ambientais: Aspectos Econômicos.

Abstract

The objective of this study was to evaluate economically the viability of production system the dairy crossbreds male bulls or Nellore finished in feedlot with under shade and full sun. Thirty-two bulls: sixteen crossbred and sixteen Nellore, with the average 325 kg de live weight. The animals were kept in feedlot during eighty-four days with the diet ad libitum, the diets were composed with concentrate and roughage (Elephant grass silage – Pennisetum purpureum Schum and sugar cane). For economic analysis was considered the animals of the sun treatment were kept in feedlot with the full sun, for animals of the treatment with under shade the feedlot was under with artificial shade. For estimated the cost were considered the costs with: animal purchasing price, animal health, labor, technical assistance, feed, working capital, depreciation of facilities and cost of land opportunity. The indicators of profitability calculated were: gross margin, net margin and profit. The revenues obtained in commercialization the animals finished were bigger for the Nellore (R$ 2.299,53 and R$ 2.366,13 treatments with under shade and full sun, respectively). The gross margin was positive for all treatments, therefore the net margin was negative for the group Nellore kept in feedlot with under shade, and this group didn't pay all costs with the depreciation of facilities. The profit obtained was positive only for the treatments crossbred-kept under shade (R$ 8,90) and crossbred- full sun (R$ 102,75). The more representative costs showed in the descending order were: animal purchasing price, feed and technical assistance. The genetic groups data when compared showed if the only production system with dairy crossbred bulls obtained economic viability. When observed the environments, the feedlot with artificial shade showed viability only the short- time.