Performance of broilers submitted to different intensities and duration of thermal stress

The performance of broilers submitted to thermal discomfort in the first weeks of life may be impaired, since the thermoregulatory system of the bird is not fully developed. The objective of this study was to analyze the effects of different thermal challenges on the performance of broilers. Two hun...

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Published inDyna (Medellín, Colombia) Vol. 86; no. 211; pp. 131 - 137
Main Authors Abreu, Lucas Henrique Pedrozo, Yanagi Junior, Tadayuki, Bahuti, Marcelo, De Lima, Renato Ribeiro, Lourençoni, Dian, Fassani, Édison José
Format Journal Article
LanguageEnglish
Published Universidad Nacional de Colombia 01.10.2019
Subjects
animal environment
poultry farming
productive responses
thermal comfort
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Summary:The performance of broilers submitted to thermal discomfort in the first weeks of life may be impaired, since the thermoregulatory system of the bird is not fully developed. The objective of this study was to analyze the effects of different thermal challenges on the performance of broilers. Two hundred and forty broilers were submitted to different desired dry-bulb temperatures (tdb: 24, 27, 30 and 33°C) and stress duration (SD: 1, 2, 3 and 4 days) in the second week of life. Feed intake (FI), weight gain (WG) and feed conversion (FC) were evaluated at 21 days of age. Although differences were verified for FI (p <0.05), none were observed for WG (p> 0.05). Reductions of FC for the 24, 27 and 33°C tdb were 14.8, 8.6 and 10.1%, respectively. The smallest FC was observed at 30°C, indicating comfort condition.
ISSN:0012-7353
2346-2183
DOI:10.15446/dyna.v86n211.79465