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Engenharia Agrícola

versão impressa ISSN 0100-6916


MENDES, Angélica S.; MOURA, Daniella J. de; NAAS, Irenilza de A.  e  SONODA, Lília T.. Activating temperatures of ventilation systems for turkeys in low humidity periods. Eng. Agríc. [online]. 2010, vol.30, n.5, pp.788-798. ISSN 0100-6916.

This study aimed to evaluate different turn on systems of climatization (fans and fogging sprinklers) to improve the internal environment and the birds' welfare, avoiding productive losses and expensive wastes in electrical energy. The study was conducted in a commercial property with two poultry houses, located in Uberlândia, MG, Brazil, during the phase of low relative humidity of the air (June to December). The poultry houses were compared under the parameters of concentration of CO2, temperature and relative humidity, surface temperature of the litter and production indexes. The climatic data were subjected to analysis of variance and productive data submitted to chi-square, using the software Minitab, V.14. The results showed in treatments one and two that concentrations of CO2 in the air (372,70 and 379,46 ppm, respectively) were below the internationally recommended limits for both systems. The internal temperatures (26,23 e 26,56 ºC, respectively) were always above the recommended for birds, and the levels of relative humidity (69,73 e 70,42, respectively) were on average in the recommended range for both systems. The conclusion is that the poultry house programmed to trigger the air-conditioning later, consumed less electricity, had better feed conversion, lower incidence of arthritis, but a higher percentage of mortality.

Palavras-chave : fans; fogging sprinklers; thermal comfort; electric power consumption.

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