Composição tecidual e análise econômica de cortes especiais de ovinos suplementados com blocos multinutricionais.

Abstract

The objective of this work was to compare the tissue composition of the main special cuts of sheep supplemented with multinutrient blocks (MBs) with and without purging potato meal (O. macrocarpa) in its composition and analyze the financial and economic viability these special courts. The research was conducted at the Center for Research and Education Semi-Arid (NUPEÁRIDO) of the Federal University of Campina Grande (UFCG) in the meat processing sector Mocó Agricultural Ltda. the Tamanduá Farm, Santa Terezinha-PB. MBs were produced by the State Enterprise for Agricultural Research of Paraíba SA (EMEPA-PB). We used 24 sheep type Santa Ines, males, with an average age of 6 months, average weight of 26.5 kg. The animals were divided into 4 treatments: Treatment 1 (T1) received only MBs (positive control); Treatment 2 (T2) were added with MBs purge potato meal at a dose of 1 g / kg / bw; in treatment 3 (T3) blocks added with the same meal at 0.5 g / kg / bw, 50% of the dose of T2; and Treatment 4 (T4) and MBs separately by a chemical anthelmintic subcutaneously (Moxidectin 1%) in a single dose of 1 mL / 50 kg (negative control). At the end of the experimental period, the animals were slaughtered. From left carcass were conducted in nine special courts: Sliced neck, shoulder, loin discovered, covered loin, rib, sirloin, filet mignon, steak and leg. These were dissected and their constituent tissues were separated and weighed. The cost structure and revenue used in the economic analysis was the Effective Operating Cost, Total Operating Cost, Fixed Cost, Variable Cost, Total Cost of Production, Gross Revenues and Gross Margin. Depreciation was calculated using the straight line method. The cash flow was formed by values of the entry and exit of resources and products per unit of time that make up the investment proposal. Was considered the time horizon of 10 years. We considered three indicators of economic viability: Net Present Value, Internal Rate of Return and the simple payback. The Return Attractiveness Minimum Rate was the profitability of savings accounts (6%). There were no differences in the consumption of MBs between treatments. In relation to tissue constituents of special cuts, there was a significant difference (P <0.05) in total income of muscle and muscle relationship / cut bone "leg" of T2. In carré cut cover of T2 dorsi muscle Longuissimus was heavier. Cutting "palette" was no difference in intermuscular fat T4 and T2. In cut prime rib was subcutaneous fat T4 that was superior to the others. The rest of the special courts did not differ from their constituents between treatments. The average cost of production of kilogram live weight was R $ 5.23 per animal slaughtered and R $ 136.58. The gross and net margins were positive. Earnings and profitability had incipient results. The Net Present Value (NPV) was negative and the Internal Rate of Return (IRR) was higher in the live animal sales model. However, in both cases, there is inability return on investment (payback) over the next ten years. It can be concluded that the use of compounds of MBs purge potato meal as a nutritional supplement provides gains in ovine muscle and fat composition of special cuts carcass when consumed in an amount permitting intake of 1g / kg / PV . As regards the economic analysis, one can conclude that it is not feasible to implement special cuts of the carcass of lambs within the Paraíba, in view of the low values of financial indicators that point to a capital return inability invested over ten, making it unaffordable model economically.