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Study Of Comfort Temperature For Broilers Up To 21 Days Of Age

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2012 IX International Livestock Environment Symposium (ILES IX)  ILES12-0708.(doi:10.13031/2013.41641)
Authors:   Déborah Cunha Cassuce, Ilda de Fátima Ferreira Tinôco, Fernando Costa Baêta, Fernanda Campos Sousa, Diogo Rezende Coelho
Keywords:   thermal stress, aviculture, performance

Due to changes in genetics and nutrition, as well in climatization of broiler chickens to Brazil climate, temperature values currently accepted as optimal may be outdated. The objective of this research was to update the environment temperature that characterize the thermal comfort for broilers chickens from 01 to 21 days of age, under Brazilian production conditions. This research was conducted with 600 COBB birds, which were distributed in five growth chambers maintained at different temperatures during the first three weeks of age. During the experimental period, temperature values were progressively reduced, constituting of five treatments: T2724-21, T3027-24, T3330-27, T3633-30, T3936-33. It was observed that the birds maintained in the T3027-24 treatment presented better performance compared to other environment conditions. Based on the obtained regression models, the environment temperature values that provide the greater weighing gain for the broiler chicken grow in the initial period were 31.3, 25.5 and 21.8C, respectively for the first, second and third week of age.

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