RESULTS: Compared with the control group, GCM-supplemented groups significantly reduced (P < 0.05) the rate of unqualified eggs of laying hens aged 17-24 weeks. Supplementation of GCM significantly increased (P < 0.05) yolk color and serum glutathione peroxidase (GSH-Px) activity but decreased (P < 0.05) the hydrogen peroxide (H2 O2 ) content in the serum of laying hens at the age of 20 weeks. Furthermore, groups supplemented with GCM showed a significant increase (P < 0.05) in Haugh unit, yolk color, activities of total superoxide dismutase and GSH-Px, and the glucose content in serum, and a decrease (P < 0.05) in the content of urea nitrogen and H2 O2 and malondialdehyde in serum of laying hens at the age of 24 weeks. 500 mg kg-1 GCM supplementation significantly increased (P < 0.05) the number of large white follicles and 1000 mg kg-1 GCM supplementation decreased the number of large yellow follicles in 28-week-old laying hens.
CONCLUSIONS: These results indicated that GCM supplementation has positive effects on reducing egg loss and improving egg quality in the early laying period of laying hens. © 2023 Society of Chemical Industry.
结果:与对照组相比,添加GCM组显著降低(P<0.05)17~24周龄蛋鸡的蛋不合格率。在20周龄时,补充GCM显着提高了蛋鸡的蛋黄颜色和血清谷胱甘肽过氧化物酶(GSH-Px)活性(P<0.05),但降低了血清中过氧化氢(H2O2)含量(P<0.05)。此外,添加GCM的组Haugh单位显着增加(P<0.05),蛋黄颜色,总超氧化物歧化酶和GSH-Px的活性,和血清中的葡萄糖含量,24周龄蛋鸡血清尿素氮、H2O2和丙二醛含量降低(P<0.05)。在28周龄蛋鸡中,添加500mgkg-1GCM显着增加(P<0.05)大的白色卵泡数量,添加1000mgkg-1GCM减少大的黄色卵泡数量。
结论:这些结果表明,在蛋鸡产蛋早期,添加GCM对减少蛋损失和提高蛋品质具有积极作用。©2023化学工业学会。