Sun Yanyan, Li Yunlei, Ma Shumei, Shi Lei, Chen Chao, Li Dongli, Guo Jiangpeng, Ma Hui, Yuan Jingwei, Chen Jilan
Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Pingliang Academy of Agricultural Sciences, Pingliang 744000, China.
Animals (Basel). 2023 Feb 9;13(4):616. doi: 10.3390/ani13040616.
Light presents an important exogenous factor for poultry. This study examined effects of LED lights with different defined spectrums on growth and reproduction of indigenous Beijing-You chickens. A total of 576 one-day old female chicks were divided into 16 rooms, and each were exposed to four different lights: LED A (21% green light, 30% blue light, 24% yellow light, and 25% red light), B (35%, 35%, 18%, and 12%), C (27%, 30%, 22%, and 21%), or compact fluorescent lamps (CFL, 15%, 28%, 41%, and 16%). Results showed that feed intake and feed conversion ratio were comparable among treatments throughout the 17 week rearing period ( > 0.05). LED C showed similar body weight gain with CFL, but higher than LED A and B. The CFL birds start to lay on 132.25 d, while LED B did not lay until 148.25 d. The age at 50% egg production did not vary among groups ( = 0.12). Total egg number until 43 week of LED B was higher than others ( < 0.05). Therefore, LED lights with defined spectral proportion have different effects on chickens' growth and reproduction. The LED C promotes the prepubertal growth, and the LED B provides proper sexual maturation age and better egg-laying persistence.
光照是家禽重要的外源因素。本研究考察了不同光谱的LED灯对北京油鸡生长和繁殖的影响。总共576只1日龄雌性雏鸡被分为16个房间，每个房间接受四种不同的光照：LED A（21%绿光、30%蓝光、24%黄光和25%红光）、B（35%、35%、18%和12%）、C（27%、30%、22%和21%），或紧凑型荧光灯（CFL，15%、28%、41%和16%）。结果显示，在整个17周的饲养期内，各处理组的采食量和饲料转化率相当（P>0.05）。LED C组的体重增加与CFL组相似，但高于LED A组和B组。CFL组的鸡在132.25日龄开始产蛋，而LED B组直到148.25日龄才开始产蛋。各实验组50%蛋产量时的日龄没有差异（P=0.12）。直到43周龄时，LED B组的总产蛋数高于其他组（P<0.05）。因此，光谱比例确定的LED灯对鸡的生长和繁殖有不同影响。LED C促进青春期前生长，LED B提供合适的性成熟年龄和更好的产蛋持续性。
