Author/Authors :
Gaafar، H.M.A نويسنده Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt Gaafar, H.M.A , Abdel-Raouf، E.M نويسنده Department of Animal Production, Faculty of Agriculture, Kafrelsheikh University, Egypt Abdel-Raouf, E.M , Bendary، M.M نويسنده Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt Bendary, M.M , Ghanem، G.H.A نويسنده Animal Production Research Institute, Agriculture Research Center, Dokki, Egypt Ghanem, G.H.A , El-Riedy، K.F.A نويسنده Animal Production Research Institute, Agriculture Research Center, Dokki, Egypt El-Riedy, K.F.A
Abstract :
Twenty eight lactating buffaloes were used in a completely randomized design with 2×2 factorial arrange-ment of four experimental diets including low protein-low energy (LP-LE), low protein-high energy (LP-HE), high protein-low energy (HP-LE) and high protein-high energy (HP-HE). Results showed that the HP-HE diet recorded the highest digestibility coefficients of CP, EE, NFE, nutritive values, TDN and DCP in-take, while HP-LE diet had the highest CF digestibility (P < 0.05). The HP-HE diet had the highest (P < 0.05) actual milk and 7% FCM yield and the contents of protein, lactose, SNF and TS in milk, HP-LE diet had the highest fat content (P < 0.05). The HP-HE diet showed the lowest amounts of DM and TDN per kg, 7% FCM, while LP-HE diet had the lowest amount of DCP per kg 7% FCM (P < 0.05). The LP-HE diet re-corded the lowest average daily feed cost, while HP-HE diet showed the lowest feed cost/kg 7% FCM and the highest total revenue and economic efficiency (P < 0.05). Buffaloes fed HP-HE diet showed short periods from parturition to first estrus and first service, service period, days open, the lowest number of services per conception and the highest conception rate (P < 0.05).
