Hengyong Xu, Yuxiang Lu, Dan Li, Chaoyang Yan, Yuru Jiang, Zhi Hu, Zhipeng Zhang, Ranran Du, Xiaoling Zhao, Yao Zhang, Yaofu Tian, Qing Zhu, Yiping Liu, and Yan Wang
In order to investigate the effects of dietary probiotics supplementation on laying performance, egg quality, serum hormone levels, immunity, antioxidant, and gut microbiota of layers at different laying stages, a total of 168 Tianfu green shell laying hens (28-day-old) were randomly divided into 2 treatments: a non-supplemented control diet (NC), and diet supplemented with 10 g/kg of probiotics, respectively. Each treatment had 6 replicates with 14 hens per replicate. The feeding trial lasted for 54 weeks. The results showed that the supplementation of probiotics significantly increased the average egg weight, improved egg quality (p