Protein efficiency Energy Efficiency Performance Index   0-3 weeks 0-5 weeks 0-3 weeks 0-5 weeks 0-5 weeks Interaction effect (MExEAA) 2700, 85 0.515 0.609 6.79 8.03 46.97ef 2700, 100 0.542 0.688 6.31 8.01 50.41de 2700, 115 0.592 0.775 6.21 8.12 50.14de 2900, 85 0.521 0.594 7.30 8.33 45.50f 2900, 100 0.513 0.646 6.36 8.01 53.44cd 2900, 115 0.562 0.715 6.26 7.97 56.50bc 3100, 85 0.486 0.545 7.28 8.16 51.35d 3100, 100 0.508 0.596 6.80 7.97 57.18b 3100, 115 0.525 0.657 6.32 7.90 60.82a Pooled SEM 0.006 0.012 0.083 0.051 0.867 Main Effects AMEn, kcal/kg 2700 kcal 0.550p 0.691p 6.44q 8.05 49.17r 2900 kcal 0.532p 0.652q 6.64pq 8.10 51.82q 3100 kcal 0.507q 0.599r 6.80p 8.01 56.45p EAA levels 85% AA 0.507x 0.583y 7.12w 8.17 47.94y 100% AA 0.521x 0.643x 6.49x 8.00 53.68x 115% AA 0.560w 0.716w 6.26x 8.00 55.82w Probability ME x EAA NS NS NS NS P<0.029 ME levels P<0.001 P<0.0001 P<0.025 NS P<0.0001 EAA levels P<0.0001 P<0.0001 P<0.0001 NS P<0.0001

pqr(energy level), wxy(EAA levels) Values bearing different superscripts differ significantly(P<0.05). NS=Non-significant (P>0.05). The values are means.

Table 4: Protein (g/g gain) and energy (kcal/g gain) efficiency of growing quails at different growth phases.