Avaliação econômica da produção de ovelhas em função de diferentes níveis nutricionais em pastos de Brachiaria brizantha cv. Marandu

Abstract

The objective was to evaluate levels of supplementation of beef sheep in pastures of Brachiaria brizantha cv. Marandu in the Brazilian Cerrado. The study included the gestation and lactation phases of the ewes, in addition to the rearing and termination of lambs. Seventy-seven ewes were used, distributed in two nutritional treatments, offering 0.2% and 0.4% of live weight (BW). In the rearing phase, 48 lambs supplemented with creep-feeding were used, and finished on pasture with supplementation at 1.6% BW. The indicators of the production system were calculated, as well as the revenues, costs and profit of the production systems. Revenues from treatments 0.2% and 0.4% of PC were R$ 6,246.40 and R$ 7,128.00, respectively. However, the effective operating cost of the 0.4% was higher, in the amount of R$ 6,206.01 vs. R$ 5,095.73 (0.2%), generated a profit of R$ 922.07, while the 0.2% was R$ 1,150.67, with profit margins of 18.42% (0.2%) and 12.94% (0.4%). Revenue per sheep of R$ 183.72 vs. 216.00, cost per sheep of R$ 149.87 vs. R$ 188.06, with a profit per sheep of R$ 33.84 and R$ 27.94, respectively for treatments 0.2% and 0.4%. The indicators for lambs, respectively for treatments 0.2% and 0.4%, were R$ 271.58 vs 258.12 revenue per lamb, R$ 221.55 vs R$ 248.24 cost per head produced, profit per head of R$ 50.03 and R$ 36.88, with the cost per kg of lamb product being R$ 6.53 vs. R$ 6.97, and profit per kg of meat produced was R$ $1.47 and R$1.03. Therefore, both production systems are bioeconomically viable, however, the use of the treatment of 0.2% of the PC, generated a greater economic return. It is concluded that the supplementation of ewes from pregnancy to lactation meeting up to 0.2% and 0.4% of live weight, together with supplementation in the rearing phase (in creep-feeding) and finishing, generated indicators positive positives. However, meeting 0.2% of BW is more economical, as it obtains a lower production cost per ewe, and consequently generates a greater economic return to the sheep production system raised on pastures of Brachiaria brizantha cv. Marandu in the Brazilian Cerrado.