Table 2. Effect of supplementing dietary protease to low CP diet on growth performance in weanling pigs.
| Items | CON1) | LP | PLP1 | PLP2 | SEM | p-value |
|---|---|---|---|---|---|---|
| Body weight (kg) | ||||||
| Initial | 7.17 | 7.17 | 7.17 | 7.17 | 0.003 | 0.887 |
| Phase 1 | 11.74a | 11.38b | 11.61ab | 11.34b | 0.100 | 0.046 |
| Phase 2 | 21.66 | 21.17 | 21.54 | 21.39 | 0.220 | 0.463 |
| Phase 1 (0–14 days) | ||||||
| ADG (g) | 326a | 300b | 317ab | 297b | 7.0 | 0.049 |
| ADFI (g) | 413 | 385 | 405 | 385 | 8.0 | 0.053 |
| FCR | 1.266b | 1.284ab | 1.279ab | 1.296a | 0.006 | 0.039 |
| Phase 2 (15–35 days) | ||||||
| ADG (g) | 472 | 466 | 473 | 479 | 11.0 | 0.867 |
| ADFI (g) | 718 | 724 | 724 | 742 | 15.0 | 0.717 |
| FCR | 1.521 | 1.553 | 1.530 | 1.550 | 0.014 | 0.312 |
| Overall | ||||||
| ADG (g) | 414 | 400 | 410 | 406 | 6.0 | 0.476 |
| ADFI (g) | 596 | 588 | 596 | 599 | 6.0 | 0.858 |
| FCR | 1.441 | 1.472 | 1.453 | 1.475 | 0.010 | 0.076 |
1)
CON, basal diet; LP, CON − 0.3% CP; PLP1, LP + 0.05% protease; PLP2, (CON − 0.50% CP) + 0.05% protease.
a,b
Means groups that have different superscripts in the same row are distinct (p < 0.05).
CP, crude protein; LP, low protein; ADG, average daily gain; ADFI, average daily feed intake; FCR, feed conversion ratio.