Green and Blue Monochromatic Lights Promote Growth and Development of Broilers Via Stimulating Testosterone Secretion and Myofiber Growth

Methods of light treatment such as light schedule, intensity or illuminance, and color are important factors that influence avian productivity. Therefore, artificial illumination has been widely used in modern poultry husbandry. Although progress had been made in understanding of the effects of light schedule and intensity on avian growth, effects of light color on avian growth are not clear. In this study, 276 male Arbor broilers were reared under white, red, green, and blue lights from light-emitting diode lamps as light sources. Broilers' growth and productive performance were increased under green light during the early period (0 to 26 d of age) or blue light during the later period (27 to 49 d of age). Furthermore, both blue and green lights were more effective to stimulate testosterone secretion and myofiber growth that led to increased body growth. These results indicate that light-emitting diode lamps have value in the modern broiler husbandry.