Na microrregião de Viçosa - MG, a criação de frango de corte via contratos de integração com a PIF-PAF S/A Indústria e Comércio tornou-se fonte adicional de renda para as propriedades rurais de pequeno e médio porte. Assim, este trabalho visou verificar a viabilidade de contratos de integração nessa região; especificamente, pretendeu-se elaborar e analisar um projeto de implantação de um aviário, determinar a rentabilidade do investimento, mensurar os riscos da atividade sob o ponto de vista do integrado e auxiliar a tomada de decisão. Para isso, calcularam-se indicadores de viabilidade econômica do projeto, como Valor Presente Líquido, Taxa Interna de Retorno e Razão Benefício/Custo; além disso, foi feita uma análise de sensibilidade para posterior análise de risco. Os resultados apontaram para a viabilidade econômica do projeto; ademais constatou-se que a sua lucratividade é mais sensível aos componentes da receita do que dos custos, sendo o preço recebido por ave a variável de maior sensibilidade. Percebeu-se também que os contratos de integração não eliminam totalmente o risco da atividade e que a integradora transfere parte do risco de preços ao produtor.
The chicken production in Viçosa area is done by integration agreement with Pif Paf Company and it is an important option for increasing the income of small farmers. The objective of this paper is to check the viability of integration agreements. A project of a plant for chicken production was drawn and observed in order to determine its profitability and risks, with the purpose of helping the decision making. The Net Present Value, Internal Rate of Return, Cost/Benefit Ratio, Risk Sensitivity and Risk Analysis were calculated. The results show that the project is feasible and the profitability is more sensitive to changes in production price than changes in production costs. This study also points out that the integration agreement does not eliminate the risk of the production, in other words, the company transfers part of the price risk to the producers

O presente trabalho teve o objetivo de avaliar o ambiente térmico no interior de modelos físicos de galpões avícolas construídos em escala reduzida (1:10). O conforto térmico foi avaliado por meio do Índice de Temperatura do Globo Negro e Umidade (ITGU), Carga Térmica de Radiação (CTR) e efetividade das coberturas em reduzir o ITGU em relação à cobertura construída com telhas de alumínio (épsilon). Quatro modelos construídos com telhas cerâmicas e equipados com ventilação natural ou forçada foram comparados a dois modelos construídos com telhas cerâmicas e de alumínio, respectivamente, sem lanternim. Pode-se concluir que as coberturas com câmaras de ventilação artificial (B30CVF) ou natural (B30CVN) proporcionaram melhores ambientes térmicos no interior dos modelos reduzidos, no qual o último tem a vantagem de não requerer gasto de energia elétrica.

The aim of this study was to determine the coefficients of the Goettingen model for Redbro birds and estimate the digestible lysine requirements. To determine the model parameters, three nitrogen balance trials were performed in Periods I (14–28 days), II (42–56 days) and III (70–84 days), using 42 birds per trial. The birds were individually housed and subjected to six diets with increasing levels of nitrogen, with lysine as the limiting amino acid (deficient by 20% in relation to other amino acids). Dietary nitrogen concentrations were 8, 16, 24, 32, 40 and 48 g/kg. A control diet was added to confirm lysine as the first limiting amino acid. Nitrogen balance trials were divided into 5 days of adaptation and two periods of excreta collection, each one of 5 days. The response of the birds to a control diet confirmed that lysine was the first limiting amino acid. The adjustment of the exponential functions between nitrogen retention or excretion and nitrogen intake allowed estimation of parameters of the Goettingen model. The maximum potential for nitrogen retention was 3276, 2585 and 2603 mg/BWkg0.67.day, nitrogen maintenance requirement was 225, 135 and 122 mg/BWkg0.67.day and efficiency of nitrogen utilisation was 313 × 10−6, 406 × 10−6 and 415 × 10−6 in the phases of 14–28, 42–56 and 70–84 days. The digestible lysine intake for Periods I, II and III, based on 60% of the maximum potential for nitrogen retention, was 711, 989 and 1272 mg/day (1.225%, 1.137% and 1.09% of lysine in the diet for a daily feed intake of 58, 87and 117 g/day), respectively.

An experiment was carried out to evaluate the effect of environmental enrichment in a free-range chicken production system on live performance as a function of microclimate, physiological parameters, and performance parameters. Four production modules were divided into four pens with 10 birds each, totaling 60 birds. The following treatments were applied: access to a paddock (TEST), access to a paddock with perches (PER), access to a paddock with artificial shade (SHA), and access to the paddock with perches and artificial shade (PESH). The PESH production module presented the best globe temperature (Tbg,°C) and enthalpy (h, kJ/kg), and thereby, the best thermal environmental conditions, which ensured the longest permanence time of the birds in the paddock. The SHA and PESH modules promoted the lowest respiratory rate and shank and comb temperatures. Live performance was influenced by the presence of environmental enrichment (modules SHA and PESH), with the highest live weight (LW) and weight gain (WG) and the lowest feed conversion ratio (FCR) and metabolizable energy intake (MEI). Parts yield, such as giblets, were not influenced by production modules, except for PESH, which promoted higher offal weight. In general, chickens reared in enriched production modules presented greatest performance and comfort results and were considered close to optimal rearing conditions.