ArticleVeterinary medicine and science2026
Effects of AM/PM Feeding Regimen on Productive Performance, Egg Quality, Bone Properties, Blood Metabolites and Nutrient Utilization in the Aged Laying Hens.
Article in Veterinary medicine and science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Daily behavioral patterns of laying hens kept in a multi-tier system across different microclimatic conditions.Veterinary and animal science · 2026Article
- Effects of AM/PM Feeding Regimen on Productive Performance, Egg Quality, Bone Properties, Blood Metabolites and Nutrient Utilization in the Aged Laying Hens.Veterinary medicine and science · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
backgroundThe nutrient requirements of laying hens are not static but dynamic, changing throughout the day in response to the cyclic nature of egg formation.
objectivesThe current study aimed to evaluate the impact of the AM/PM feeding regimen (AM/PM-FR), which involved higher levels of protein, amino acids and available phosphorus, and lower levels of Ca in the morning diet, with the converse in the afternoon diet, on aged laying hens.
methodsA total of 300, 74-week-old Hy-Line W36 laying hens were randomly assigned to a completely randomized design with 5 treatments, 6 replicates, and 10 hens per replicate. Experimental treatments included offering AM/PM-FR at 0% (control), 10%, 20%, 30% and 40% changing nutrient levels (CNL) between the morning (5:00 AM-2:00 PM) and evening (2:00 PM-5:00 AM) diets. The exposure program consisted of continuous lighting from 5:00 AM to 9:00 PM and darkness from 9:00 PM to 5:00 AM.
resultsThe feed conversion ratio (FCR) and economic profit, income minus feed cost (IMFC), improved with a quadratic trend in response to increased CNL of AM/PM-FR. Throughout the entire experimental period, birds fed AM/PM-FR at 30% CNL showed improvements of 4.57% in FCR and 17.55% in IMFC compared to the control group. A lower incidence of egg fractures and a higher yolk crude protein concentration were observed with a linear trend in response to increased CNL of AM/PM-FR. By increasing CNL of AM/PM-FR, the total tract apparent mineral (Ca and phosphorus) and ether extract retention improved with quadratic and linear trends, respectively. Non-significant effects of the treatments were noted on egg quality, blood metabolites, bone mechanical properties and mineral contents.
conclusionsIt was concluded that the use of AM/PM-FR at 30% CNL in aged laying hens may facilitate the precision nutrition and thus improve production and economic performance.
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