Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon S7N 5A8 SK, Canada.
Department of Mechanical Engineering, University of Saskatchewan, Saskatoon S7N 5A9 SK, Canada.
Poult Sci. 2022 Jul;101(7):101937. doi: 10.1016/j.psj.2022.101937. Epub 2022 Apr 30.
Light color during brooding and rearing may impact broiler production; however, literature results are inconsistent. To address this, the effects of 3 wavelength spectra on broiler performance in 2 sex and 2 genotypes (Ross YPMx708 and EPMx708) were studied. Broilers were raised (d 0-35) under wavelength programs provided by LED light bulbs (blue (455 nm), green (510 nm) or white) under similar intensities (clux). Two trials were conducted (total number of birds = 14,256; 6 room replications per lighting treatment; 18 replicate pens per light × sex × genotype). Data were analyzed as a 3 × 2 × 2 (wavelength × sex × genotype) factorial design, with trial as a random variable block and wavelength nested within rooms (Proc Mixed, SAS 9.4). Birds raised under white light were heavier than under blue or green light at d7 (P = 0.004), and green at d14 (P = 0.03). Feed intake, gain-to-feed efficiency and flock uniformity (d15, 28) did not differ. Mortality only differed at wk 5, when broilers raised under white light had higher mortality than those raised under blue (P = 0.03). YPM-708 were heavier at 21 d (P = 0.007), 28 d (P = 0.001), and 35 d (P < 0.0001), had a better total feed conversion rate (P < 0.0001), higher mortality for wk 1 (P = 0.001), lower mortality during the last wk (P = 0.02) and better uniformity at 28 d (P = 0.01) than EPM-708 broilers. Males were heavier at all measured ages except d0 (d7-P = 0.03, other weeks P < 0.0001), had better total feed conversion (P < 0.0001), increased weekly mortality except for wk 1 (wk2-P = 0.04, wk3-P = 0.002, wk4, 5, and total-P = 0.0001) and were less uniform (P = 0.0002) than females. YPM-708 and EPM-708 males had higher total feed intake (P < 0.0001), and males raised under white light had higher mortality than females raised under white or blue light (P = 0.01). To conclude, the use of specific light colors (blue and green) had only minor impacts on broiler production when light intensity was equalized and balanced for bird spectral sensitivity, and its use to improve productivity does not appear to be advantageous for broilers in a commercial setting.
育雏和饲养期间的浅色可能会影响肉鸡生产；然而，文献结果并不一致。为了解决这个问题，研究了 3 种波长光谱对 2 种性别和 2 种基因型（罗斯 YPMx708 和 EPMx708）肉鸡生产性能的影响。肉鸡在 LED 灯泡（蓝色（455nm）、绿色（510nm）或白色）提供的波长方案下饲养（d0-35），强度相似（通量）。进行了两项试验（总鸟类数量=14256；每个光照处理 6 个房间重复；每个光×性别×基因型有 18 个重复笼）。数据作为 3×2×2（波长×性别×基因型）析因设计进行分析，试验作为随机变量块，波长嵌套在房间内（Proc Mixed，SAS 9.4）。在 d7 时，在白光下饲养的鸡比在蓝光或绿光下饲养的鸡重（P=0.004），在 d14 时在绿光下饲养的鸡比在绿光下饲养的鸡重（P=0.03）。采食量、增重与饲料效率和鸡群均匀度（d15、28）没有差异。死亡率仅在第 5 周时有所不同，在白光下饲养的肉鸡死亡率高于蓝光下饲养的肉鸡（P=0.03）。YPM-708 鸡在 21 日龄（P=0.007）、28 日龄（P=0.001）和 35 日龄（P<0.0001）时体重较重，总饲料转化率较好（P<0.0001），第 1 周死亡率较高（P=0.001），最后一周死亡率较低（P=0.02），28 日龄均匀度较好（P=0.01）。雄性鸡在所有测量的年龄中都比雌性鸡重，除了 d0 时（d7-P=0.03，其他周 P<0.0001），雄性鸡的总饲料转化率更好（P<0.0001），每周死亡率增加，除了第 1 周（P=0.04，第 3 周 P=0.002，第 4、5 周和总 P=0.0001），均匀度较低（P=0.0002）。YPM-708 和 EPM-708 雄性鸡的总采食量较高（P<0.0001），在白光下饲养的雄性鸡的死亡率高于在白光或蓝光下饲养的雌性鸡（P=0.01）。总之，当光强度相等并平衡鸟类光谱敏感性时，使用特定的光颜色（蓝色和绿色）对肉鸡生产的影响很小，其在商业环境中提高生产力的用途似乎对肉鸡没有优势。
