Effects of Different Light Sources on Growth Performance,Slaughter Performance and Sexual Development of Beijing-You Chicken
[Objective]This experiment was aimed to explore the optimal light source for Beijing-You chickens by comparing the growth performance,slaughter performance,and sex development-related indicators under four different light sources.[Method]A total of 720 1-day-old commercial Beijing-You chickens with similar body weights were randomly assigned to four light treatment groups:Incandescent lamp,fluorescent lamp,warm white LED lamp and cool white LED lamp.Each treatment group was divided into 5 replicates,with 36 chickens per replicate.At the end of the 4th,8th and 13th weeks of age,production performance was measured for each replicate.One chicken was randomly selected from each replicate,and a total of 5 chickens in each treatment group were measured for sex hormone-related indexes.At the end of 13 weeks of age,3 chickens with body weight close to the average of each replicate were selected from each replicate,and a total of 15 chickens were collected per treatment group,for the measurement of slaughter performance and sexual organ index.[Result]The results showed that throughout the growth period,the feed intake of chickens in incandescent lamp and cool white LED lamp groups were significantly higher than that of fluorescent lamp group and warm white LED lamp group(P＜0.05),the feed to gain ratio in warm white LED lamp group was significantly lower than that of cool white LED lamp and fluorescent lamp groups(P＜0.05),and incandescent lamp group had the highest feed to gain ratio among the four groups(P＜0.05).The four light sources had no significant effect on the slaughter performance of Beijing-You chicken(P＞0.05).In terms of sexual development,the secretion of testosterone in the incandescent lamp and the cool white LED lamp groups were significantly higher than that of fluorescent lamp group(P＜0.05),and it was at an intermediate level in warm white LED lamp group.The secretion of melatonin in incandescent lamp,cool white LED lamp and warm white LED lamp groups were significantly higher than that of fluorescent lamp group(P＜0.05).There was no significant difference in testicular organ index and cockscomb thickness of roosters among the four light sources groups(P＞0.05),the length of chicken comb in warm white LED and fluorescent lamp groups were significantly greater than that in incandescent lamp group(P＜0.05),and it was at an intermediate level in cool white LED lamp group.Similarly,the cockscomb height was the highest in warm white LED lamp group,and it was significantly larger than that in incandescent lamp group(P＜0.05),and it was at an intermediate level in fluorescent lamp and cool white LED lamp groups.[Conclusion]Using LED lamps in the lighting system for Beijing-You chickens could significantly improve the growth performance.Moreover,LED lamps could also promote the secretion of sex development-related hormones,indirectly facilitating sexual development.
Beijing-You chickenlight sourcesgrowth performanceslaughter performancesexual development
万方数据
维普
