Table 3. Effect of protease dietary supplementation on growth performance in broilers1)
Items (%) | CON | T1 | T2 | T3 | SEM | p-value |
Linear | Quadratic |
1–18 d | | | | | | | |
BWG (g) | 760b | 782b | 797ab | 815a | 6.62 | 0.0311 | 0.5891 |
FI (g) | 1,056 | 1,077 | 1,085 | 1,105 | 11.18 | 0.7483 | 0.3516 |
FCR | 1.389 | 1.377 | 1.361 | 1.356 | 0.01 | 0.2280 | 0.7339 |
19–35 d | | | | | | | |
BWG (g) | 943b | 990ab | 1,015ab | 1,043a | 10.75 | 0.0234 | 0.9615 |
FI (g) | 1,635 | 1,660 | 1,650 | 1,676 | 18.79 | 0.2314 | 0.6973 |
FCR | 1.734a | 1.677ab | 1.626b | 1.607b | 0.02 | 0.0286 | 0.7306 |
1–35 d | | | | | | | |
BWG (g) | 1,703b | 1,772b | 1,812ab | 1,858a | 13.25 | 0.0005 | 0.6645 |
FI (g) | 2,691 | 2,737 | 2,735 | 2,781 | 21.27 | 0.3329 | 0.4320 |
FCR | 1.580a | 1.545ab | 1.509ab | 1.497b | 0.02 | 0.0131 | 0.6685 |
Treatment groups: CON, basal diet; T1, basal diet + 0.03% protease; T2, basal diet + 0.06% protease; T3, basal diet + 0.09% protease.
Means in the same row with different superscripts differ (p < 0.05).
BWG, body weight gain; FI, feed intake; FCR, feed conversion ratio.