Summary
This comparative field trial evaluated the productive and economic performance of different laying hen genotypes under free-range management from 21 to 44 weeks of age. The study assessed both biological performance indicators and egg quality attributes alongside production costs, providing data relevant to assessing breed suitability for alternative (non-cage) production systems. Such genotype comparisons contribute evidence on which genetic lines may be most appropriate for welfare-focused or resource-constrained free-range operations.
UK applicability
The findings are moderately applicable to UK free-range egg production, where similar housing regulations and consumer interest in alternative systems exist; however, differences in climate, feed availability, and specific welfare standards between Turkey and the UK may limit direct transferability of economic and performance conclusions.
Key measures
Egg production performance, egg quality traits (shell strength, yolk colour, Haugh unit), body weight gain, feed intake, feed conversion ratio, economic metrics (cost per egg, cost per kilogramme of eggs)
Outcomes reported
The study compared performance metrics, egg quality parameters, and economic costs across different laying hen genotypes reared in a free-range system over a 24-week production period (21–44 weeks of age). Measurements likely included egg production rate, egg weight, shell quality, yolk colour, feed conversion efficiency, and cost per dozen eggs produced.
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