Effects of dietary dimethylglycine supplementation on laying performance, egg quality, and tissue index of hens during late laying period

文献类型： 外文期刊

第一作者： Yao, Hong

作者： Yao, Hong;Hu, Yan;Wang, Qiang;Zhang, Yijian;Shi, Shourong;Yao, Hong;Hu, Yan;Wang, Qiang;Zhang, Yijian;Shi, Shourong;Yao, Hong;Rao, Kaiqing

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关键词： dimethylglycine; laying performance; egg quality; late laying period

期刊名称：POULTRY SCIENCE （ 影响因子：4.014； 五年影响因子：4.192 ）

ISSN：

年卷期： 2022 年 101 卷 2 期

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收录情况： SCI

摘要： In this study, the effects of 5 graded dietary levels (0.025, 0.05, 0.075, 0.1, and 0.125%) of dimethylglycine (DMG) were studied in laying hens during the late laying period (71-78 wk). Graded doses of DMG from 0.025 to 0.125% in the diet produced quadratic positive (P < 0.05) responses in the laying rate, egg-feed ratio, yolk color, grade follicular weight, and the number of large white follicles and linear positive (P < 0.05) responses in average egg weight, and the number of large white follicles. With 0.1% DMG, the laying rate and egg-feed ratio improved (P < 0.05), and the abdominal fat percentage decreased. Considering the laying performance under the conditions used in this study, the best -fit model for the DMG requirements of laying hens was estimated to range from 0.049 to 0.065% DMG during the late laying period based on a regression analysis. The addition of DMG did not affect the total cholesterol (TCH) and triglyceride (TG) contents in the plasma of laying hens; however, it signifi-cantly reduced the abdominal fat rate. DMG may change the course of lipid deposition in laying hens during the late laying period. In conclusion, supplementation with DMG can improve the laying rate and follicles development of laying hens.

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