Dong Rongrong, Liu Hao, Zhang Huan, Wu Fengyang, Xiu Haidong, Chen Shiwei, Yin Xinxiang, Zhou Xiaohui
School of Food and Biology, Hebei University of Science and Technology, Shijiazhuang 050000, PR China.
Department of Asset and Laboratory Management, Hebei University of Science and Technology, Shijiazhuang 050000, PR China.
Poult Sci. 2025 Apr 1;104(7):105120. doi: 10.1016/j.psj.2025.105120.
To evaluate the effects of Bacillus subtilis ZY1 supplementation, production performance, egg quality, serum parameters, and intestinal health in laying hens were investigated. A total of 240 healthy 59-week-old Hy-Line Brown laying hens were randomly assigned to four groups: a control group (Con) fed a basal diet and three treatment groups supplemented with Bacillus subtilis ZY1 at levels of 0.05 % (LG), 0.1 % (MG), and 0.2 % (HG). The duration of trial lasted eleven weeks, including a one-week pre-feeding phase. The results indicated that dietary supplementation with ZY1 increased the egg laying rate in the LG and HG groups (P < 0.05) as well as improved the qualified egg rate in the LG and MG groups (P < 0.05). Moreover, the LG group also demonstrated superior egg quality and enhanced antioxidant capacity and immune function by decreasing the level of MDA (42.47 %) and improving the content of T-AOC, GSH-Px, CAT, SOD, IgM and IgG (34.31 %, 23.92 %, 37.68 %, 31.64 %, 14.01 %, and 17.84 %, respectively) in serum samples (P < 0.05). The changes in biochemical parameters such as AST, LDH, TG (12.40 %, 13.79 %, and 32.13 % decreased, respectively) and Ca (41.35 % increased) were particularly pronounced in LG groups (P < 0.05), indicating that ZY1 supplementation enhanced metabolic capacity of laying hens (P < 0.05). Furthermore, laying hens in the treatment groups exhibited significantly increased villus height (VH) and an elevated villus height-to-crypt depth ratio (VH/CD) within their duodenal tissues (P < 0.05). These findings suggest that dietary supplementation with ZY1 effectively improves production performance, egg quality, serum parameters, and intestinal health in laying hens; notably, a dosage of 0.05 % ZY1 was identified as the optimal level for these improvements. This study provides valuable insights into optimizing the application of Bacillus subtilis ZY1 in laying hen management practices.
为评估添加枯草芽孢杆菌ZY1的效果，对蛋鸡的生产性能、蛋品质、血清参数和肠道健康进行了研究。将240只健康的59周龄海兰褐蛋鸡随机分为四组：对照组（Con）饲喂基础日粮，三个处理组分别添加0.05%（LG）、0.1%（MG）和0.2%（HG）的枯草芽孢杆菌ZY1。试验持续11周，包括一周的预饲期。结果表明，日粮中添加ZY1提高了LG组和HG组的产蛋率（P<0.05），并改善了LG组和MG组的合格蛋率（P<0.05）。此外，LG组还表现出更好的蛋品质，通过降低血清中MDA水平（42.47%）和提高T-AOC、GSH-Px、CAT、SOD、IgM和IgG含量（分别为34.31%、23.92%、37.68%、31.64%、14.01%和17.84%）增强了抗氧化能力和免疫功能（P<0.05）。LG组中AST、LDH、TG等生化参数的变化（分别下降12.40%、13.79%和32.13%）以及Ca的变化（增加41.35%）尤为显著（P<0.05），表明添加ZY1增强了蛋鸡的代谢能力（P<0.05）。此外，处理组蛋鸡十二指肠组织中的绒毛高度（VH）显著增加，绒毛高度与隐窝深度之比（VH/CD）升高（P<0.05）。这些发现表明，日粮中添加ZY1可有效提高蛋鸡的生产性能、蛋品质、血清参数和肠道健康；值得注意的是，0.05%的ZY1剂量被确定为实现这些改善的最佳水平。本研究为优化枯草芽孢杆菌ZY1在蛋鸡养殖管理实践中的应用提供了有价值的见解。
