ME and Amino Acid Requirements of Broiler Breeders Ceylan Intercontinental Hotel March 29-30, 2010 ASAIM/USB Craig Coon University of Arkansas Energy Components as % of Total Requirement 100% 90% 80% 70% 60% Maintenance (% of total) Growth (% of total) 50% Egg Mass (% of total) 40% 30% 20% 10% 0% 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 Age (wk) Broiler Breeder Hen Metabolizable Energy Requirements for Maintenance, Body Weight Gain and Egg Production Prediction equations for ME for broiler breeder hens • Equation 1 • ME = BW0.75[111.9 - 0.46 T ] + 5.6G + 2.45EM • Equation 2 • ME = BW0.75 [110.3 - 0.47 T °C + 0.055 (T - 22.5)2] + 5.6G + 2.45EM • ME = metabolizable energy (kcal/kg0.75) • G = metabolizable energy for body weight gain (kcal/g) • EM = metabolizable energy for egg mass synthesis (kcal/g) • T = temperature (oC) ME Requirements for Broiler Breeders ME = BW0.75 [111.02 - 0.49 T + 0.049 (T - 22.07)2] + BW∆ (1/0.77 x ERf + 1/0.38 x ERp) + ECE/0.73 x EM ME = metabolizable energy (kcal); BW = body weight (kg0.75); T = temperature (°C); EM= egg mass (kcal/g of egg): BW∆ = body weight change (g/d); ERf = energy retained as fat (kcal); ERp = energy retained as protein (kcal); ECE = energy content of eggs (kcal/g); and EM = egg mass (g). ME Requirements of Broiler Breeders as affected by Temperature 112 110 108 5 7106 . 0 g 104 k / l a c102 k E M100 98 96 94 14 16 18 20 22 24 26 28 30 Temperature C Compare ME Models for Predicting Requirements 31 Wks Cobb 500 Breeder Management Guide: BW = 3.33 kg; BW change = 2.86 g/d; and EM = 46.86 g/d 45 Wks Cobb 500 Breeder Management Guide: BW = 3.54 kg; BW change = 2.14 g/d; and EM = 43.10 g/d