Early age thermal manipulation on the performance and physiological response of broiler chickens under hot humid tropical climate.

Autor: Oke OE; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria; Laboratory of Poultry Production Techniques, Center of Excellent in Poultry Sciences, University of Lome, Lome, Togo. Electronic address: emaoke7@yahoo.co.uk., Alo ET; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Oke FO; Department of Agricultural Economics and Farm Management, Federal University of Agriculture, Abeokuta, Nigeria., Oyebamiji YA; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Ijaiya MA; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Odefemi MA; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Kazeem RY; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Soyode AA; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Aruwajoye OM; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Ojo RT; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Adeosun SM; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria., Onagbesan OM; Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria.
Jazyk: angličtina
Zdroj: Journal of thermal biology [J Therm Biol] 2020 Feb; Vol. 88, pp. 102517. Date of Electronic Publication: 2020 Jan 09.
DOI: 10.1016/j.jtherbio.2020.102517
Abstrakt: Initial brooding temperature is critical for post-hatch growth of broiler chickens. A study was conducted to investigate the early age thermal manipulation (EATM) on the performance and physiological responses broiler chickens under hot humid tropical climate. A total of 260 unsexed day-old Arbor-acre broiler chicks were assigned to five thermal treatments of brooding temperature regimens having 4 replicates of thirteen birds each. The heat treatments were: initial brooding temperature of 35 °C for the first 2 days, and then decreased subsequently, gradually to 22 °C at 21 d of age (CT), initial temperature of 35 °C, sustained for the first 4 days and then decreased gradually (conventionally) (FD), initial temperature of 35 °C for the first 7 days (SD), the birds in CT, but the brooding temperature was raised to 35 °C again for another 3 days from day 7 (SD3), initial brooding temperature of 35 °C for the first 10 days (TD). Data were collected on daily feed intake and weekly body weights. Blood samples were collected from 8 birds per treatment weekly for the determination of plasma uric acid, triglycerides, triiodothyronine (T 3 ) and creatinine kinase. Data obtained were laid out in a Completely Randomized Design (CRD). Results showed that the final weights of the birds in FD were higher (P < 0.05) than those of the other treatments at the finisher phase. Feed intake of the birds in FD was higher than those of SD3 and TD. FCR of broiler chickens in CT, SD, SD3 and TD was higher than that of FD. The rectal temperature, plasma MDA and blood glucose of the thermally challenged birds in FD was generally better (P < 0.05) than those of the other treatments. It was concluded that EATM can be used to improve performance and also protect broiler chickens from acute heat stress at market age.
Competing Interests: Declaration of competing interest The authors declare no conflict of interest.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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