ORIGINAL RESEARCH article
Front. Anim. Sci.
Sec. Animal Nutrition
Volume 6 - 2025 | doi: 10.3389/fanim.2025.1638293
This article is part of the Research TopicBioactive-Enriched Foods: A Present, and Future Perspective on Sustainability and NutritionView all articles
Dietary metabolic energy/ lysine ratios improve yolk color and Hastelloy unit without affecting egg performance of brown laying hens
Provisionally accepted
- Linyi University, Linyi, China
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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. 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.
Keywords: Metabolic energy, Lysine, egg quality, egg production, laying hens
Received: 30 May 2025; Accepted: 13 Jun 2025.
Copyright: © 2025 Zhang, Du, Zhuang, Zhang, Wang, Liu and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Jian Ying Zhang, Linyi University, Linyi, China
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