不同光照节律对AA肉鸡生产性能、胴体性能和福利的影响
发布时间：2018-12-20 11:08
【摘要】：试验以爱拔益加(AA)肉鸡为对象,旨在研究不同光照节律对白羽肉鸡生产性能、胴体性能和福利的影响。选用480只1日龄AA肉鸡,随机分成4组,每组4个重复,网上平养。4个处理组从第二周分别采用4种光照节律,即连续光照(23L∶1D)、模拟自然光照(16L∶8D)、模拟自然+夜间补光2h光照(16L+2L∶6D)和变程光照(光照时间随日龄先减少后增加)。光照强度为5lx。结果显示,4组平均体增重无显著差异(P0.05);连续光照在各阶段料重比高于其他三组(1~3周:P=0.01,4~6周:P=0.0004)。连续光照在4~6周和1~6周龄阶段的死亡率高于其他三组(P=0.01,P=0.004)。变程光照和模拟自然+夜间补光2h光照的胸肌重和胸肌率高于其他两组(P=0.01,P=0.0001)。模拟自然+夜间补光2h光照的腹脂重和腹脂率最低(P=0.03,P=0.0001)。四种光照节律在屠体重、屠宰率和全净膛重、全净膛率上无显著差异(P0.05)。连续光照组步态评分值≤1的个体比例最小,腿部健康最差。这些结果说明,在AA肉鸡生产中可以考虑采用模拟自然+夜间补光2h光照代替连续光照,以提高胴体质量和动物福利,同时降低能耗。
[Abstract]:The effects of different light rhythms on the performance, carcass performance and welfare of white feather broilers were studied. Four hundred and eighty 1-day-old AA broilers were randomly divided into 4 groups, each group with 4 repeats, which were cultured on the net. From the second week, the four treatment groups were treated with four light rhythms, i.e. continuous illumination (23L:1D), and simulated natural light (16L:8D). Simulated natural night light supplementation for 2 h (16L 2L:6D) and variable program illumination (light time decreased first with the age of the day and then increased). The light intensity is 5lx. The results showed that there was no significant difference in average body weight gain among the four groups (P0.05), and the ratio of feed to weight in each stage of continuous illumination was higher than that in the other three groups (1 ~ 3 weeks: P ~ (0.01) 1 ~ 4 ~ 4 ~ 6 weeks: P ~ (0.0004). The mortality rate of continuous illumination at the age of 4 weeks and 1 week was higher than that of the other three groups (P0. 01 and P0. 004). The weight of pectoralis muscle and the rate of pectoralis muscle in the two groups were higher than those in the other two groups (P0. 01 and P0. 0001). The weight of abdominal fat and the rate of abdominal fat were the lowest (P0. 03 and P0. 0001). There were no significant differences among the four light rhythms (P0.05) in body weight, slaughter rate, weight of whole bore, and total rate of evisceration (P0.05). The proportion of individuals with gait score 鈮，
本文编号：2387911
[Abstract]:The effects of different light rhythms on the performance, carcass performance and welfare of white feather broilers were studied. Four hundred and eighty 1-day-old AA broilers were randomly divided into 4 groups, each group with 4 repeats, which were cultured on the net. From the second week, the four treatment groups were treated with four light rhythms, i.e. continuous illumination (23L:1D), and simulated natural light (16L:8D). Simulated natural night light supplementation for 2 h (16L 2L:6D) and variable program illumination (light time decreased first with the age of the day and then increased). The light intensity is 5lx. The results showed that there was no significant difference in average body weight gain among the four groups (P0.05), and the ratio of feed to weight in each stage of continuous illumination was higher than that in the other three groups (1 ~ 3 weeks: P ~ (0.01) 1 ~ 4 ~ 4 ~ 6 weeks: P ~ (0.0004). The mortality rate of continuous illumination at the age of 4 weeks and 1 week was higher than that of the other three groups (P0. 01 and P0. 004). The weight of pectoralis muscle and the rate of pectoralis muscle in the two groups were higher than those in the other two groups (P0. 01 and P0. 0001). The weight of abdominal fat and the rate of abdominal fat were the lowest (P0. 03 and P0. 0001). There were no significant differences among the four light rhythms (P0.05) in body weight, slaughter rate, weight of whole bore, and total rate of evisceration (P0.05). The proportion of individuals with gait score 鈮，
本文编号：2387911
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