不同光照周期对快速黄羽肉鸡抗应激、免疫和胫骨特性的影响

Effects of Lighting Schedules on Anti-stress Ability,Immune Function and Tibia in Yellow-feathered Broilers

旨在用岭南黄羽肉鸡进行试验,研究不同光照周期对肉鸡抗应激、免疫和胫骨特性的影响。选用360只0日龄黄羽肉公鸡,随机分成4组,每组6个重复,每个重复15只鸡。4个处理组分别为4种光照制度,即连续光照(23h光照:1h黑暗,23L:1D)、短光照(16L:8D)、短光照间歇(12L:3D:2L:3D:2L:2D)和模拟自然光照,试验期63d。结果,自然光照组63日龄鸡的总抗氧化能力(P=0.08)、新城疫抗体效价(P=0.07)和法氏囊指数(P=0.06)比其他3个组有提高的趋势;3个短光照组42日龄鸡的肌酸激酶水平比连续光照组有降低的趋势(P=0.09);短光照间歇组21日龄鸡的胸腺指数(P=0.06)、21(P=0.09)和42日龄鸡(P=0.06)的T淋巴细胞阳性率有大于其他光照组的趋势;其他指标不受光照制度的影响(P>0.05)。这些结果说明,岭南黄羽肉鸡生产中采取自然光照或短光照间歇更有利于其抗应激能力和免疫功能的发挥,从而更有利于其健康。

This experiment was conducted to investigate the effects of lighting schedules on antistress ability,immune function and tibia of Yellow-feathered broilers with a completely randomized design.A total of 360 0-day-old male Lingnan Yellow-feathered broilers were randomly allocated to 4treatments with each treatment having 6replicates of 15 birds.The lighting schedules were continuous(23L:1D),16L:8D,12L:3D:2L:3D:2L:2Dand simulated natural lighting.The experiment lasted for 63 d.The total antioxidant capacity(P=0.08),Newcastle disease antibody titer(P=0.07)and Bursa of fabricius index(P=0.06)tended to be higher in simulated natural lighting group than those in other groups on 63-day-old.Creatine kinase activity tended to be lower(P=0.09)in 3short lighting groups than that in continuous lighting group on 42-day-old.Thymus index(P=0.06)on 21-day-old and ANAE+on 21-day-old(P=0.09)and 42-day-old(P=0.06)in short intermit group tended to be higher than those in other groups.Lighting schedules didn't affect other parameters(P>0.05).These results show that natural or short intermit lighting condition are benefit to anti-stress ability and immune function of Yellow-feathered broilers and benefit to the health of broilers.