Abstract：
BACKGROUND: This study aimed to determine the effects of a mixture of glycerol monolaurate and cinnamaldehyde (GCM) supplementation on the laying performance, egg quality, antioxidant capacity, and serum parameters of laying hens. A total of 1120 14-week-old Jingfen-1 strain laying hens with similar performance were randomly allocated to four dietary treatments: control, and GCM groups supplemented with 250, 500, or 1000 mg kg-1 for 12 weeks.
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.
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.
摘要：
背景：这项研究旨在确定补充单月桂酸甘油酯和肉桂醛（GCM）的混合物对产蛋性能的影响，鸡蛋质量,抗氧化能力，蛋鸡血清参数。共有1120只14周龄具有相似性能的Jingfen-1菌株蛋鸡被随机分配到四种日粮处理：对照，和GCM组补充250、500或1000mgkg-1，持续12周。
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。
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。
