Go to Top Go to Bottom
Anim Biosci > Accepted Articles
https://doi.org/10.5713/ab.21.0183    [Accepted] Published online October 29, 2021.
Effect of feed restriction on the maintenance energy requirement of broiler breeders
Guilherme Ferreira da Silva Teofilo1  , Rony Riveiros Lizana1  , Rosiane de Souza Camargos1  , Bruno Balbino Leme1  , Freddy Alexander Horna Morillo1  , Raully Lucas Silva1  , João Batista Kochenborger Fernandes1  , Nilva Kazue Sakomura1,* 
Department of Animal Science, Faculty of Agricultural and Veterinarian Sciences of São Paulo State University – UNESP, Jaboticabal-SP, 14884-900, Brazil
Correspondence:  Nilva Kazue Sakomura, Tel: +55-16-99709-5757, Fax: +55-16-3209-7503, Email: nilva.sakomura@unesp.br
Received: 19 April 2021   • Revised: 11 June 2021   • Accepted: 21 September 2021
Abstract
Objective
This study aimed to evaluate the effect of the ad libitum and restricted feeding regimen on fasting heat production (FHP) and body composition.
Methods
Twelve Hubbard broilers breeders were selected with the same body weight (BW) and submitted in two feeding regimes: Restricted (T1) with feed intake of 150 g/bird/day and ad libitum (T2). The birds were randomly distributed on the treatments in two runs with three replications per treatment (per run). The birds were adapted to the feed regimens for ten days. After that, they were allocated in the open-circuit chambers and kept for three days for adaptation. On the last day, oxygen consumption – VO2 and carbon dioxide production – VCO2 were measured by 30 h under fasting. The respiratory quotient (RQ) was calculated as the VCO2/VO2 ratio, and the HP was obtained using the Brower equation (1985). The FHP was estimated throughout the plateau of HP 12 hours after the feed deprivation. The body composition was analyzed by DEXA scanning at the end of each period. Data were analyzed for one-way ANOVA using the Minitab software.
Results
The daily feed intake was 30 g higher to T2 (P<0.01) than the T1. Also, the birds of the T2 had significatively (P<0.05) more oxygen consumption (+3.1 L/kg0.75/d) and CO2 production (+2.2 L/kg0.75/d). That resulted in a higher FHP 359±14 kJ/kg0.75/d for T2 than T1 296±17.23 kJ/kg0.75/d. In contrast, the RQ was not different between treatments, with an average of 0.77 for the fasting condition. In addition, protein and fat composition were not affected by the treatment, while a tendency (P<0.1) was shown to higher bone mineral content on the T1.

Conclusion

The birds under ad libitum feeding had a higher maintenance energy requirement but their body composition was not affected compared to restricted feeding.
Keywords: Basal Metabolic Rate; Fasting Heat Production; Feed Regimen


Editorial Office
Asian-Australasian Association of Animal Production Societies(AAAP)
Room 708 Sammo Sporex, 23, Sillim-ro 59-gil, Gwanak-gu, Seoul 08776, Korea   
TEL : +82-2-888-6558    FAX : +82-2-888-6559   
E-mail : animbiosci@gmail.com               

Copyright © 2021 by Animal Bioscience.

Developed in M2PI

Close layer
prev next