EFFECT OF FREE-RANGE PRODUCTION SYSTEM ON EGG QUALITY OF NATIVE GREENLEG PARTRIDGE HENS

The aim of the study was to determine the effect of free-range production system on the quality of eggs from Greenleg Partridge hens. Free-range layers laid eggs with darker shells. Eggshells from free-range hens were characterized by greater weight and thickness and lower strength. Eggs from free-range hens had lower albumen height and Haugh units, greater yolk weight and more intense yolk colour compared to hens having no access to free range. The crude protein content of eggs from free-range hens was lower than in eggs from confined hens, while vitamin A and E content was greater. The housing system had no significant effect on the fat and cholesterol content of egg yolk.

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EFFECTS OF BREEDING AND HOUSING SYSTEMS OF LAYERS ON EGG QUALITY AND THE ACTIVITY OF CYSTATIN AND LYSOZYME

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.