Department of Animal Science, Agricultural Faculty, Ondokuz Mayis University, 55139, Samsun, Turkey.
National High Institute of Sciences and Techniques, Institut National Supérieur des Sciences et Techniques d'Abéché (INSTA), 40823, Abeche, Chad.
Trop Anim Health Prod. 2021 May 13;53(2):320. doi: 10.1007/s11250-021-02765-5.
The present study aimed to determine the effects of varying light intensity (high 121.8, medium 57.4 and low 11.9 lux) and stocking density (high 552.3, medium 736.3, and low 1104.5 cm cage floor area per hen) treatments on the performance, egg quality, and certain feather condition traits of Lohmann-Brown hens reared in a battery cage system between 20 and 40 weeks of age. Body weight was determined individually at 19 weeks and at 50% yield age (sexual maturity). Feed intake, egg yield, egg weight, and feed conversion ratio were determined weekly. Feather condition was also evaluated individually at 40 weeks of age. Hens reared under high light intensity and low stocking density reached sexual maturity and peak yield earlier than others. The highest body weight was determined for hens reared under high light intensity (1536.6 g), while the lowest in the medium light intensity group (1461.2 g). Hens reared under high and medium light intensity showed higher egg yield than those reared in low intensity (120.5, 120.0 and 112.8 eggs, respectively). In addition, hens reared at low and medium stocking density had higher egg yield than high density (119.7, 120.7, and 112.9 eggs, respectively). Hens reared under low (61.6 g) and medium (61.0 g) light intensity produced heavier eggs than hens in high light intensity (59.6 g). While feed intake was not affected in any treatment, hens reared at low and medium stocking density had a better feed conversion ratio than hens at high density (2.19, 2.20, and 2.40, respectively). Our study results showed that a sustainable production is possible by maintaining the welfare-performance balance when 50-60 lux light intensity and 700-800 cm cage floor area per hen are provided.
本研究旨在确定不同光照强度（高 121.8、中 57.4 和低 11.9 勒克斯）和饲养密度（高 552.3、中 736.3 和低 1104.5 平方厘米每只母鸡笼底面积）处理对 20 至 40 周龄饲养在笼养系统中的洛曼-布朗母鸡的性能、蛋品质和某些羽毛状况特征的影响。在 19 周龄和产蛋率达到 50%（性成熟）时分别测定体重。每周测定采食量、产蛋量、蛋重和饲料转化率。在 40 周龄时还单独评估羽毛状况。在高光照强度和低饲养密度下饲养的母鸡比其他母鸡更早达到性成熟和产蛋高峰期。在高光照强度下饲养的母鸡体重最高（1536.6 克），而在中光照强度组中体重最低（1461.2 克）。在高光照强度和中光照强度下饲养的母鸡产蛋量高于在低光照强度下饲养的母鸡（分别为 120.5、120.0 和 112.8 个蛋）。此外，低和中饲养密度下饲养的母鸡产蛋量高于高密度下饲养的母鸡（分别为 119.7、120.7 和 112.9 个蛋）。在低光照强度（61.6 克）和中光照强度（61.0 克）下饲养的母鸡产的蛋比高光照强度下饲养的母鸡重（59.6 克）。虽然在任何处理中，采食量都不受影响，但低和中饲养密度下饲养的母鸡的饲料转化率优于高密度下饲养的母鸡（分别为 2.19、2.20 和 2.40）。我们的研究结果表明，当提供 50-60 勒克斯光照强度和每只母鸡 700-800 平方厘米笼底面积时，可以维持福利-性能平衡，实现可持续生产。
