Effects of Color Lights on Performance, Immune Response and Hematological Indices of Broilers

Many studies have been shown the effects of light wave length on broilers performance in experimental assay, but we decided to evaluate the effects of different color lights on broiler performance, immune response and hematological parameters in filed study. For this purpose, 40000 day-old broiler chickens were placed in four houses as follow: green, sunny yellow, blue and red light. All light sources were equalized at the intensity of 25 lux, with light period of 23 hours daily. In days 8, 18, 30 and 42 from each house, 25 samples of serum were obtained to evaluate the ND-antibody responses. At 42 days of age, 25 blood samples were taken from each house to evaluate HDL, LDL, VLDL, triglyceride, cholesterol, total protein, creatinine, BUN and glucose of serum. The live body weight and feed intake were recorded weekly and Feed Conversion Ratio (FCR) was calculated. The results indicated that the birds reared under yellow and blue light had the best and weakest performance, respectively. The decrease of maternal antibody in group which reared under green light was the slowest and at the end of experiment the birds which were exposed to green and blue light had the highest ND antibody titers among all groups but it was insignificant (P>0.05). The birds in yellow light house showed a significant increase in total serum protein (P 0.05).