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Table 2 Effect of dietary crude protein source and level on growth performance, protein deposition, and N balance of finishing gilts (90–113 kg, n = 6)

From: Influences of dietary protein sources and crude protein levels on intracellular free amino acid profile in the longissimus dorsi muscle of finishing gilts

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
  1. aCalculated from Eq.2 and Eq.6
  2. bComputed as (daily N deposition / daily N intake)