Biological and economic performances of broiler chickens as affected by daylength and food location
1997
Zulkifli I. | Che Norma M. T.
The effects of daylength and food location on biological and economic performances were studied in broiler chickens. Commencing from 14 days of age, equal number of chicks were provided either 12h of natural lighting (12L) only or 12 natural lighting and 12h supplementary lighting (24L). For each lighting regimen the chickens were provided food either at fixed (FF) or alternated (AF) (alternated daily at 1945 h)location. Within the 12L group, FF female chicks were heavier than their AF counterparts on Days 21 and 28. On Day 35 and thereafter, regardless of treatment groups, growth of female chicks was similar. Neither lighting regimen nor food position had significant effect on body weight of males throughout the duration of study. Regardless of daylength and food location, the amount of food consumed (except from Day 14 to 20), feed conversion ratios and incidence of leg deformities were similar. Financial analysis showed a higher net profit for 12 L birds.
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