ArticleAnimals : an open access journal from MDPI2022
Effects of Energy and Protein Levels on Laying Performance, Egg Quality, Blood Parameters, Blood Biochemistry, and Apparent Total Tract Digestibility on Laying Hens in an Aviary System.
Article in Animals : an open access journal from MDPI, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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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.
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Who cites it
16 citing papers in PubMed, 28 citations in OpenAlex.
- Spatiotemporal screening and functional analysis of gut microbiota associated with abdominal fat deposition in breeder broiler hens.Poultry science · 2026Article
- Feasibility of rice bran-based diet for the performance of laying hens.Veterinary and animal science · 2026Article
- Dietary biological silage from tambaqui by products affect performance, physiology, and egg quality of young and old laying hens.Tropical animal health and production · 2026Article
- The Systematic Study on the Effects of Adding Bile Acids and Zinc to Laying Hens' Diets: From Production Performance to Egg Quality, Trace Element Content, and Intestinal Microorganisms.Biological trace element research · 2026Article
- Effect of polyphosphates on productivity and physiological characteristics in laying hens.Journal of animal science and technology · 2026Article
- Probiotic-enzyme complex improves laying performance in laying hens fed low-protein diets by modulating gut microbiota and host metabolism.Frontiers in veterinary science · 2026Article
- Study on energy requirement of Wenshui Luhua Green-Shelled laying hens during the late laying period.Poultry science · 2026Article
- Dietary protein level in response to nitrogen balance along with production performance of laying hens.Journal of animal science and technology · 2025Article
- Establishment of an Amino Acid Nutrition Prediction Model for Laying Hens During the Brooding and Early-Growing Period.Animals : an open access journal from MDPI · 2025Article
- Improving Egg Quality in Tropical Environments: Assessing the Maize Meal Replacement by Wheat Bran and Soybean Oil in Laying Hen Diets.Veterinary medicine and science · 2025Article
- Optimizing low crude protein diet: Evaluating Glycine as a conditionally essential Amino Acid.Poultry science · 2025Review
- Effects of dietary metabolizable energy and crude protein levels on laying performance, egg quality and fecal microbiota of Taihe Silky Fowl during the peak laying period.Animal bioscience · 2025Article
- Effects of Fish Bone Meal Supplementation on Growth Performance, Blood Immunity, Intestinal Morphology, and Gut Microbiota in Laying Hens.Animals : an open access journal from MDPI · 2025Article
- Utilization of soft pistachio hulls in Japanese quail diets for enhanced egg quality and yolk pigmentation.PeerJ · 2025Article
- Dietary energy levels alter production performance, egg quality, and intestinal health of Wenshui green-shell layers in the peak laying period.Frontiers in veterinary science · 2025Article
- Enriching Eggs with Bioactive Compounds through the Inclusion of Grape Pomace in Laying Hens Diet: Effect on Internal and External Egg Quality Parameters.Foods (Basel, Switzerland) · 2024Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
This study was performed to investigate the effects of apparent metabolizable energy (AMEn) and protein levels on laying performance, egg quality, blood parameters, blood biochemistry, and apparent total tract digestibility of energy and nutrients in diets fed to laying hens in an aviary system. A total of 560 Hy-Line Brown laying hens (age = 30 week) were distributed in a completely randomized experimental design in 2 × 2 factorial arrangements with 2 metabolizable energy levels (2700 and 2800 kcal AMEn/kg) and 2 protein levels (16.5 and 14.5% CP). Four treatments and four replicates of 40 birds each (stocking density = 15 birds/m2) were prepared. Results revealed no significant interaction between AMEn and CP in the diet in terms of egg production, floor eggs, broken and dirty egg production, egg mass, feed intake, and feed conversion ratio of laying hens. However, egg weight was affected. As dietary energy and CP levels (2800 kcal of AMEn/kg and 16.5% CP) increased, egg weight increased (p < 0.05). Egg weight, feed intake, and feed conversion ratio significantly differed (p < 0.05) as the energy content in the feed increased. Ether extract significantly varied (p < 0.05) as the energy content in the feed increased. In conclusion, laying performance and egg quality of Hy-Line Brown laying hens in the middle stage of egg production (30 to 50 weeks) were not affected by different dietary energy and protein levels, but feed intake decreased with an increasing level of AMEn in diets. Ether extract significantly varied as the energy content in the feed increased.
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Registered trials
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