Item | Protein source | Protein level | SEM | P | ||||
---|---|---|---|---|---|---|---|---|
Cottonseed meal | Soybean meal | 12 % | 14 % | Source | Level | Source × Level | ||
Initial body weight, kg | 90.30 | 88.80 | 90.30 | 88.70 | 1.86 | 0.58 | 0.56 | 0.93 |
Final body weight, kg | 115.40 | 112.30 | 114.50 | 113.10 | 1.87 | 0.16 | 0.48 | 0.90 |
Average daily feed intake, kg/d | 3.04 | 2.87 | 3.02 | 2.89 | 0.05 | 0.03 | 0.09 | 0.11 |
Gain-to-feed ratio | 0.29 | 0.28 | 0.28 | 0.29 | 0.01 | 0.30 | 0.63 | 0.77 |
Average daily gain, kg/d | 0.90 | 0.81 | 0.86 | 0.85 | 0.03 | 0.08 | 0.80 | 0.66 |
Total protein depositiona, kg | 17.90 | 17.30 | 17.70 | 17.50 | 0.26 | 0.15 | 0.48 | 0.90 |
Serum urea nitrogen, mmol/L | 7.54 | 7.19 | 6.50 | 8.23 | 0.45 | 0.59 | 0.01 | 0.24 |
Daily N intake, g/d | 64.63 | 61.18 | 58.28 | 67.54 | 1.15 | 0.04 | <0.01 | 0.91 |
Daily N deposition, g/d | 20.43 | 20.87 | 20.53 | 20.76 | 0.22 | 0.17 | 0.47 | 0.91 |
Daily N excretion, g/d | 44.20 | 40.30 | 37.70 | 46.8 | 1.31 | 0.05 | <0.01 | 0.93 |
N efficiencyb, kg/kg | 0.32 | 0.35 | 0.35 | 0.31 | 0.01 | 0.06 | <0.01 | 0.90 |