EFFECT OF DAILY WEIGHT GAIN ON AGE AT FIRST CALVING AND SUBSEQUENT MILK YIELD OF HOLSTEIN HEIFERS IN EGYPT

Document Type : Original Article

Authors

• Rabie Sadek ¹
• Gamal Ashour ¹
• Mohamed A. Ibrahim ²
• A. M. Samoul ³

¹ Department of Animal Production, Faculty of Agriculture, Cairo University

² Department of Animal production, Faculty of Agriculture, Cairo University, Giza, Egypt

³ Department of Animal Production, Faculty of Agriculture, University of Cairo, Giza, Egypt

Keywords

• Average daily gain
• age at first calving
• 305-day milk yield
• days open
• Holstein
• Egypt