The Light Environment Effect on Growth and Leg Disorders of Broilers

• Main Authors: Wei-Jen Chen, 陳維仁
• Other Authors: 盛中德
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/11866996226775569815

博士 === 國立中興大學 === 生物產業機電工程學系所 === 101 === Wavelengths play an important role in the behavior and psychology of chickens. This study examines the influence that different wavelengths and daily wavelength conversions have on chickens. The chicks, all of which were Arbor Acres, were randomly assigned to six experiments, with each experiment making use of 10 birds over a course of three repeated trials. The light source made use of LEDs. The wavelength conversion groupings of each test group were as follows: Group A: After being given green light for their first 10 days, from the 11th day onward this group was given blue light; Group B: Given a cycle consisting of green light for 3 hours, followed by red light for 1 hour and blue light for 3 hours; Group C: Given a cycle consisting of 3 hours of green light and 3 hours of blue light; Group D: Given 11 hours of green light, followed by 12 hours of blue light; Group E: After being given green light for 10 days, from the 11th day onward they were given a cycle consisting of 3 hours of blue light, and 1 hour of red light; Group F: Given a cycle consisting of 11 hours of green light, 1 hour of red light and 11 hours of blue light. Records were made of BW and feed consumption. On the 35th day, assessments of leg weakness were made when ability to walk and gait scoring were measured. Observations were also made to determine whether or not the chickens were at risk of footpad dermatitis or ankle injuries. Results indicated that using wavelength conversion stimulation could induce chickens to undertake more locomotive activity. It had a positive effect in terms of incidence of leg lesions, which decreased and therefore raised the overall well-being of the chickens.