Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens
This experiment evaluated the impact of varying ratios of dietary metabolic energy: lysine (ME: Lys) in the diet on egg production, egg quality, and feed intake of laying hens. A total of 432 Hy-line brown laying hens, aged 55 wk, were reared over a period of 11 weeks. Hens were individually assigne...
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Frontiers Media S.A.
2025-08-01
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| Series: | Frontiers in Animal Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fanim.2025.1638293/full |
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| author | Jiagang Du Jiagang Du Rufei Zhuang Yuanju Zhang Yan Wang Yunguo Liu Qianqian Zhang Jianying Zhang |
| author_facet | Jiagang Du Jiagang Du Rufei Zhuang Yuanju Zhang Yan Wang Yunguo Liu Qianqian Zhang Jianying Zhang |
| author_sort | Jiagang Du |
| collection | DOAJ |
| description | This experiment evaluated the impact of varying ratios of dietary metabolic energy: lysine (ME: Lys) in the diet on egg production, egg quality, and feed intake of laying hens. A total of 432 Hy-line brown laying hens, aged 55 wk, were reared over a period of 11 weeks. Hens were individually assigned to a basal standard diet with a ME to Lys ratio of 275:64 kcal/mg, along with five additional ratio types: 270:74 kcal/mg, 275:74 kcal/mg, 280:74 kcal/mg, 285:74 kcal/mg, and 290:74 kcal/mg. Feed and fecal digestibility were determined and egg quality were assayed on wk 1, 5, 9 and 11. The results indicated that an ME/Lys ratio of 285:74 kcal/mg improved yolk color pigment during weeks 9 and 11. Additionally, a ratio of 290:74 kcal/mg contributed to higher Hastelloy unit measurements during weeks 5, 9, and 11. In summary, while different ME/Lys ratios had no impact on overall egg production, both the 285:74 and 290:74 kcal/mg ratios demonstrated positive effects on deeper yolk color pigment and higher Hastelloy unit values. |
| format | Article |
| id | doaj-art-81ce2cda1a834304b0195aed3df34476 |
| institution | Kabale University |
| issn | 2673-6225 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Animal Science |
| spelling | doaj-art-81ce2cda1a834304b0195aed3df344762025-08-20T03:45:14ZengFrontiers Media S.A.Frontiers in Animal Science2673-62252025-08-01610.3389/fanim.2025.16382931638293Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hensJiagang Du0Jiagang Du1Rufei Zhuang2Yuanju Zhang3Yan Wang4Yunguo Liu5Qianqian Zhang6Jianying Zhang7College of Life Science, Linyi University, Linyi, Shandong, ChinaAgricultural Comprehensive Law Enforcement Team, Agricultural and Rural Affairs Bureau of Lanshan District, Linyi, Shandong, ChinaLinyi Vocational University of Science and Technology, Linyi, Shandong, ChinaCollege of Life Science, Linyi University, Linyi, Shandong, ChinaCollege of Life Science, Linyi University, Linyi, Shandong, ChinaCollege of Life Science, Linyi University, Linyi, Shandong, ChinaCollege of Life Science, Linyi University, Linyi, Shandong, ChinaCollege of Life Science, Linyi University, Linyi, Shandong, ChinaThis experiment evaluated the impact of varying ratios of dietary metabolic energy: lysine (ME: Lys) in the diet on egg production, egg quality, and feed intake of laying hens. A total of 432 Hy-line brown laying hens, aged 55 wk, were reared over a period of 11 weeks. Hens were individually assigned to a basal standard diet with a ME to Lys ratio of 275:64 kcal/mg, along with five additional ratio types: 270:74 kcal/mg, 275:74 kcal/mg, 280:74 kcal/mg, 285:74 kcal/mg, and 290:74 kcal/mg. Feed and fecal digestibility were determined and egg quality were assayed on wk 1, 5, 9 and 11. The results indicated that an ME/Lys ratio of 285:74 kcal/mg improved yolk color pigment during weeks 9 and 11. Additionally, a ratio of 290:74 kcal/mg contributed to higher Hastelloy unit measurements during weeks 5, 9, and 11. In summary, while different ME/Lys ratios had no impact on overall egg production, both the 285:74 and 290:74 kcal/mg ratios demonstrated positive effects on deeper yolk color pigment and higher Hastelloy unit values.https://www.frontiersin.org/articles/10.3389/fanim.2025.1638293/fullmetabolic energylysineegg qualityegg productionlaying hens |
| spellingShingle | Jiagang Du Jiagang Du Rufei Zhuang Yuanju Zhang Yan Wang Yunguo Liu Qianqian Zhang Jianying Zhang Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens Frontiers in Animal Science metabolic energy lysine egg quality egg production laying hens |
| title | Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens |
| title_full | Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens |
| title_fullStr | Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens |
| title_full_unstemmed | Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens |
| title_short | Dietary metabolic energy/lysine ratios improve the yolk color and Hastelloy unit without affecting the egg performance of brown laying hens |
| title_sort | dietary metabolic energy lysine ratios improve the yolk color and hastelloy unit without affecting the egg performance of brown laying hens |
| topic | metabolic energy lysine egg quality egg production laying hens |
| url | https://www.frontiersin.org/articles/10.3389/fanim.2025.1638293/full |
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