Turkish Journal of Veterinary & Animal Sciences






In this study, the effects of different lighting schedules on the performance and electricity use of broilers were compared. The study was undertaken in controlled chambers and a total of 1900 broilers were divided into 10 groups consisting of 190 broilers (12.85 chicks/m^2). Each group was housed in the pens of 3.65X4.05 m (14.78 m^2). In each pen the lighting density of 3 lux was supplied using a 40 watts of lamp. Broilers subjected to different daylight (9, 11, 15 hours) and an intermittent lighting (IL) regime consisting of 1 hr of light (L): 1hr of darkness (D), 1L:2D, 1L:3D and 23L:1D (control group) were compared from 0 to 42 days. All groups reared from 1 to 10 days with same lighting schedule as control group. Birds were provided ad libitum access to feed and water. Starter ration (23% CP and 3000 kcal ME/kg of feed), grower ration (20% CP and 3100kcal ME/kg of feed), and finisher ration (18.5 CP and 3150 kcal ME/kg of feed) were provided from 0 to 14, from 15 to 35, from 36-42 days of age respectively. The values of live weight, feed efficiency and mortality were determined on 10., 21. and 42. days of age in all groups. The mean live weights of all groups on 10^{th} days of age were 191.03±0.74 g and there were no statistically significant differences between the groups. Statistically significant differences (P

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