The current investigation was designed to evaluate the effect of light regimens on broilers performance, carcass parameters, lymphoid organs, blood constituents, health parameters of Sasso broiler chicks. Two hundred and seventy chicks were randomly divided into 3 equal groups 90 chicks each (24hr continues light, C; 12hr continues light plus 12hr flash light, CF and 24hr flash light, F). All experimental chicks were housed in floor pens from one day till six weeks of age. All environmental and administrative provisions were the equivalent during the trial time. The obtained results showed that lighting regimens significantly affected growth performance, abdominal fat, plasma constituents, antioxidant markers, health parameters and performance evaluation. However, there were no significant effect on feed consumption and lymphoid organs. In addition, birds raised under continues+flash lighting program had the highest performance. Therefore, the continuous plus flash lighting program is highly recommended for Sasso broiler chicks during fattening period.
he present study was designed to investigate the effect of light regimens and vitamin D3 levels on growth performance and some carcass traits of broiler chickens. Two hundred and seventy birds were randomly assigned in factorial design (3x3). Three light regimens (24 hrs continues light, 12 hrs continues with 12 hrs flashlight and 24 hrs flashlight) and three vitamin D3 levels (0, 200 and 400 IU). Nine treatments of 30 birds each (three replicates of 10 birds each). The birds were housed in floor pens from day one till six weeks of age. Feed and water were available ad lib. and all conditions were the same during the experimental period. The results showed that significantly affected body weight, daily weight gain and feed conversion ratio. In addition, birds reared under continuous with flashlight and feed with 200 IU Vit. D3 had significantly (P≤0.05) better body weight, daily weight gain , feed conversion and some carcass traits compared to the other groups. Finally, birds reared under continuous with flashlight and feed with 200 IU Vit. D3 was better than the other groups and was recommended to the poultry producer.
SUMMARRYhe present study was designed to investigate the effect of light regimens and vitamin D3 levels on growth performance and some carcass traits of broiler chickens. Two hundred and seventy birds were randomly assigned in factorial design (3x3). Three light regimens (24 hrs continues light, 12 hrs continues with 12 hrs flash light and 24 hrs flash light) and three vitamin D3 levels (0 IU Vit. D3, 200IU Vit. D3 and 400IU Vit. D3). Nine treatments of 30 birds each (three replicates of 10 birds each). The results showed that significantly affected body weight, daily weight gain and feed conversion ratio. In addition, birds reared under continuous with flash light and feed with 200 IU Vit. D3 had significantly (P≤0.05) highest in body weight, daily weight gain and feed conversion and some plasma constituents as compared to the other groups. Finally, birds were reared under continuous with flash light and feed with 200IU Vit. D3 was better than the other groups and was recommended to the poultry producer.
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