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.