Volume: 5, 2026
5th International PhD Students’ Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: A039
DOI: https://doi.org/10.24326/ICDSUPL5.A039
Published online: 22 April 2026
Analysis of the effect of laying hen housing systems on the content of selected bioactive components in eggs
Renata Zdun*1, Natalia Wolska1, Karolina Wengerska2, Justyna Batkowska2 and Kamil Drabik2
1 Students Research Group of Poultry Biology, Breeding, and Husbandry, University of Life Science in Lublin, 13 Akademicka St., 20-950 Lublin, Poland
2 Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, 13 Akademicka St., 20-950 Lublin, Poland
* Corresponding author: zdun.renata.anna@gmail.com
Currently, on the national market of table eggs, eggs originating from 4 different poultry housing systems can be found, differing in the degree of production intensification. According to literature data, the housing system can modify both the quality of whole eggs and their individual components. Unfortunately, relatively few articles focus on the influence of laying hen housing on the content of biologically active components in the eggs obtained from them.
The aim of the study was to analyze the effect of the poultry housing system on the content of selected active components in the eggs obtained from them.
The research material consisted of a total of 120 fresh table chicken eggs (30 from each housing system). During the quality analysis, samples of thick albumen and yolk were collected for further analyses. In the yolks, cholesterol content, fat-soluble vitamins (A, D, E) content, and the content of selected minerals were determined, while in the albumen, the hydrolytic activity of lysozyme was assessed. The data were subjected to statistical analysis using one-way analysis of variance with Tukey’s post-hoc test.
Cholesterol, vitamin D and E contents were higher in eggs from both systems where laying hens were kept with outdoor access, which may be due to the inclusion of green fodder in their diet. The highest lysozyme activity was found in egg albumens from organic farming.
Keywords: cholesterol; egg quality; fat-soluble vitamins; minerals
How to cite
Zdun R., Wolska N., Wengerska K., Batkowska J., Drabik K., 2026. Analysis of the effect of laying hen housing systems on the content of selected bioactive components in eggs. In: 5th International PhD Students’ Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL5.A039