UMM Logo

Universitas Muhammadiyah Malang


Free Download Journals Directory


International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2009 > Volume 8 Number 1 > Peter D. Lewis, Linda Caston and Steve Leeson

Influence of Rearing Photoperiod and Age and Mode of Transfer to Final Photoperiod on Performance in Egg-Type Pullets

Peter D. Lewis, Linda Caston and Steve Leeson
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada
Abstract :

Lohmann White pullets were reared on 6, 9 or 12-h photoperiods and abruptly transferred to 14
h at 16 or 18 weeks or in a series of increments from 16 weeks. Body weight at and feed intake to 16 and
18 weeks increased with photoperiod. There were no interactions of rearing photoperiod with photo
stimulation age/mode for any performance parameter. Sexual maturity was advanced by rearing on the
longer photoperiods and by photostimulating at 16 rather than 18 weeks. Birds reared on 9 or 12 h laid
significantly more eggs than 6-h birds, but neither age nor mode of photostimulation significantly affected
egg production. Egg numbers were significantly correlated with age at sexual maturity. Mean egg weight was significantly heavier for pullets reared on 9 or 12 h than on 6 h, despite the former’s earlier maturity and for birds photostimulated at 18 rather 16 weeks. Mean daily feed in the laying period was not significantly affected by rearing photoperiod or photostimulation age/method and shell quality, though significantly reduced by rearing on longer photoperiods, was minimally affected by the lighting regimens in practical terms. The trend towards rearing egg-type pullets on longer photoperiods was vindicated, irrespective of photostimulation age or method.

Keywords :
Photoperiod, photostimulation, pullets, rearing, egg production

Date Deposited : 05 Jul 2011 10:13

Last Modified : 05 Jul 2011 10:13

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 8, Number 1, - 2009 , ISSN 1682-8356

Download:
Full Text Original
Abstract : pdf doc
Home | Peta Situs | Admissions | Student Research | E-Journal
Universitas Muhammadiyah Malang © 2011
Developed by Infokom UMM
Last Update : 13 December 2016 20:46Kumpulan file jurnal