Wang Chunyang, Xiao Sa, Yang Zengqi
College of Veterinary Medicine, Northwest A&F University, Yangling, China.
Front Vet Sci. 2024 Sep 23;11:1387877. doi: 10.3389/fvets.2024.1387877. eCollection 2024.
Molting is induced in commercial laying hens to rejuvenate the reproductive system and increase egg production. However, this process causes stress and reduces bird health and performance.
The experiment was conducted to study the effect of multi probiotics and vitamin additives on induced molting in 240 ISA Brown hens. Hens were randomly divided into four groups receiving probiotic and vitamin additives (I-IV) during different period of molting. During the whole molting process, the laying performance indexes such as egg laying rate, egg quality, ovary weight and oviduct lengths were measured, and the spleen index, serum immunoglobulin, immune response of NDV and AIV vaccine were monitored.
Molted hens resumed 50% egg production in just 37 days, with 1.62% mortality. Egg quality such as egg weight, yolk color, Haugh unit, eggshell strength and protein height were significantly improved. After the second production peak, the reproductive organs and immune organs returned to normal, and the immune antibody titer of NDV vaccine increased significantly.
Molting with probiotic and vitamin additives improve the laying performance and egg quality, reduce mortality, significantly improve immune function and vaccine titer, and help to enhance disease resistance and maintain production performance of aged laying hens.
对商业产蛋母鸡进行强制换羽是为了使生殖系统恢复活力并提高产蛋量。然而，这个过程会造成应激并降低鸡的健康水平和生产性能。
本试验旨在研究多种益生菌和维生素添加剂对240只艾维茵褐壳蛋鸡强制换羽的影响。母鸡被随机分为四组，在换羽的不同阶段接受益生菌和维生素添加剂（I-IV组）。在整个换羽过程中，测量产蛋性能指标，如产蛋率、蛋品质、卵巢重量和输卵管长度，并监测脾脏指数、血清免疫球蛋白、新城疫病毒（NDV）和禽流感病毒（AIV）疫苗的免疫反应。
换羽后的母鸡在短短37天内恢复了50%的产蛋量，死亡率为1.62%。蛋品质，如蛋重、蛋黄颜色、哈夫单位、蛋壳强度和蛋白高度均显著改善。在第二个产蛋高峰后，生殖器官和免疫器官恢复正常状态，新城疫病毒疫苗的免疫抗体效价显著提高。
使用益生菌和维生素添加剂进行强制换羽可提高产蛋性能和蛋品质，降低死亡率，显著改善免疫功能和疫苗效价，并有助于增强老龄产蛋母鸡的抗病能力和维持生产性能。
