Abstract
The economic viability of finishing sheep on Tanzania grass under intermittent grazing was evaluated with four concentrate supplementation levels (0; 0.6; 1.2 and 1.8% LW), two herd separation systems (electric and net fence) and three pasture sizes (1.0; 3.0 and 5.0 ha). The analysis was carried out to determine the minimal necessary conditions to have a viable business. Net income, benefitcost ratio, net present value and internal rate of return with an interest of rate of 8.75% per year were verified. The total implantation cost and maintenance to each system was estimated according to Fortaleza/CE market. Sale price between R$ 2.60 to 3.20/kg LW was considered to estimate total budget. The pasture sized 1.0 ha was economically unviable for both kinds of system tested. The system with net fence was more expensive than the one with electric fence. For the systems with supplementation, data showed viability only for a sale price above R$ 3.00/kg LW and, in some cases, in areas above 5.0 ha. KEYWORDS: concentrate supplementation; internal rate of return; Panicum maximum; profitability analysis; production system.
Highlights
The pasture sized 1.0 ha was economically unviable for both kinds of system tested
Ainda nesse sistema de produção, a taxa interna de retorno (TIR) mostrou-se maior (13%) do que a taxa de juros de oportunidade do capital, tornando o investimento nessa atividade economicamente viável
A TIR mostrou-se maior (13%) do que a taxa de juros de oportunidade do capital, tornando o investimento nessa atividade rentável
Summary
Os dados experimentais foram coletados na Fazenda Experimental do Vale do Curú, situada no município de Pentecoste – Ceará – e no Departamento de Zootecnia do Centro de Ciências Agrárias (CCA) da Universidade Federal do Ceará (UFC). Para a análise econômica foi considerada a terminação de ovinos machos castrados com peso vivo inicial de 20 kg e com o ganho médio diário (GMD), taxa de lotação (TLO) e rendimento de peso vivo (RPV) estimados pela equação de regressão para cada tratamento. Foi calculada a taxa interna de retorno (TIR), que é o percentual de retorno obtido sobre o saldo investido e ainda não recuperado em um projeto de investimento, ou seja, é o percentual que expressa a rentabilidade (retorno) anual média do capital alocado no projeto, durante todo o horizonte de análise do projeto. A avaliação dos dados foi realizada por meio de análises descritivas
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