Table 2. Growth performance of weaned pigs fed diets with positive control (PC), negative control (NC) and NC + 0.02% dietary protease (PRO) supplementation diets1)

Items Dietary treatment2) SEM p-value
PC NC PRO Diet
Day 1 to 21
  Initial BW (kg) 7.00 6.99 6.90 0.068 0.512
  Final BW (kg) 17.75a 16.00b 17.88a 0.282 < 0.05
  ADG (g/d) 511.90a 428.94b 522.83a 13.66 < 0.05
  ADFI (g/d) 649.71 643.38 644.66 30.03 0.988
  G:F (g/g) 0.796a 0.660b 0.811a 0.027 < 0.05
Day 22 to 42
  Initial BW (kg) 17.75a 16.00b 17.88a 0.282 < 0.05
  Final BW (kg) 32.50a 30.26b 32.95a 0.504 < 0.05
  ADG (g/d) 702.40 679.02 717.84 23.14 0.510
  ADFI (g/d) 1,200.68 1,201.81 1,224.98 55.01 0.941
  G:F (g/g) 0.585 0.565 0.586 0.030 0.870
Day 1 to 42
  Initial BW (kg) 7.00 6.99 6.90 0.068 0.512
  Final BW (kg) 32.50a 30.26b 32.95a 0.504 < 0.05
  ADG (g/d) 607.15a 553.98b 620.33a 11.69 < 0.05
  ADFI (g/d) 921.84 925.62 934.66 34.08 0.963
  G:F (g/g) 0.659 0.598 0.664 0.027 0.206
Each value is the mean of 5 replicates (6 pigs per pen).
PC, CP = 23.71% (phase1) and 22.36% (phase2); NC, 0.61% less CP than PC.
Means with different letters represent statistical significance (p < 0.05).
BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; G:F, gain to feed ratio.