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Effects of Color Lights on Performance, Immune Response and Hematological Indices of Broilers
Authors: Sobhan Firouzi
Number of views: 381
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) and the birds in blue light house showed an insignificant
reduction in serum triglyceride, glucose and BUN concentrations (P>0.05).