A COMPARATIVE STUDY OF COMMERCIAL FARMS SYSTEMS FOR TABLE-EGG PRODUCTION IN EGYPT

Abstract

MOHAMED MAHMOUD EZZ EL-ARAB ABD EL-AZIZ ASKORA: A comparative study of commercial farms systems for table-egg production in Egypt. Unpublished Ph.D. Thesis, Department of Poultry Production, Faculty of Agriculture, Ain Shams University, 2017. This study was conducted to evaluate the productive and economical performance of three commercial layer strains (Hy-Line Brown, Lohman Brown and Bovans Brown) kept under two different production systems (semi-closed and closed) in AL-Sharkia and AL-Gharbia governorates. Productive data were weekly obtained all over the production periods and analyzed to 52 weeks of production and also at the end of production cycles for each farm. While, economical data were measured and analyzed at the end of production cycles after sealing the flocks. Under semi-closed system, results indicated that Bovans Brown and Hy-Line Brown layers had significantly better age (day) at 50% of production, mortality percentages, feed conversion (g /egg), hen day egg production percentages (HD), hen housed egg production percentages (HH) and numbers and finally production efficiency coefficient compared to Lohman Brown layers to 52 weeks and the end of production cycles. On the other hand, Lohman Brown layers kept under closed system recorded the best age (day) at 50% of production, mortality percentage, hen day percentage, hen housed egg number, and of co