Comparison of the Effect of Monochromatic Light Types with White Light on the Productive Performance and Testosterone of Ross 308 Male Broilers

The study was carried out from September 22 to October 27, 2024, in the poultry field at the Department of Animal Production, College of Agriculture / University of Kufa. The study aimed to investigate the effects of monochromatic light on broilers (Ross 308) and their productive characteristics. 180 one-day-old male Ross308 crossbred broiler chicks , were used. Each chick weighed an average of 42.5 grams. The chicks were fed three different diets: From one to ten days of age they were fed a starter diet, from eleven to twenty-four days, they were fed a grower diet; and from twenty-five to thirty-five days, they were fed a finisher diet. The three diets' respective energy contents were determined to be 2975, 3050, and 3100 kcal/kg. In that order, the protein content was also determined to be 23, 21.50, and 20.08 %. By employing a random distribution method, the one-day-old chicks were divided into four treatments. Each treatment consisted of 45 chicks, with three replicates. Each duplicate had 15 males. The treatments that were given were T1 (control, white light), T2 (blue light), T3 (red light), and T4 (green light). The study's findings revealed a statistically significant increase (P ≤ 0.05) in the ultimate live body weight, total feed consumption, testosterone, and overall weight increase (day 35) of the avian subjects in the T2 ( blue light ) in comparison to the control group, T1 and the other groups. The feed conversion ratio for the birds experienced a substantial enhancemen.