Table 4.
Effect of dietary treatment and period on starter pig performance
| Treatmenta | ||||||
|---|---|---|---|---|---|---|
| Item | NC | BZA | BC50 | AGP | SEMb | P-value |
| Initial BW, kg | 8.53 | 9.11 | 8.55 | 8.71 | 0.41 | 0.74 |
| Period 1 BW, kg | 9.77 | 10.41 | 9.87 | 10.48 | 0.41 | 0.52 |
| Period 2 BW, kg | 17.14 | 17.81 | 17.78 | 19.14 | 0.61 | 0.15 |
| Period 1a | ||||||
| ADG, g/d | 178† | 179† | 185† | 253* | 17 | 0.012 |
| ADFI, g/d | 295† | 310† | 300† | 373* | 21 | 0.006 |
| G:F, g/g | 0.60 | 0.58 | 0.60 | 0.68 | 0.05 | 0.33 |
| Period 2a | ||||||
| ADG, g/d | 534† | 533† | 562*,† | 620* | 31 | 0.009 |
| ADFI, g/d | 801† | 859*,† | 846*,† | 940* | 27 | 0.010 |
| G:F, g/g | 0.67* | 0.62† | 0.66* | 0.66* | 0.03 | 0.04 |
| Period 1 + Period 2a | ||||||
| ADG, g/d | 401† | 398† | 420† | 482* | 23 | 0.002 |
| ADFI, g/d | 612† | 648*,† | 639† | 728* | 23 | 0.007 |
| G:F, g/g | 0.66* | 0.62† | 0.66* | 0.66* | 0.03 | 0.007 |
aPigs were fed experimental diets at weaning (28 d age) for 21 d. Treatments: NC: negative control (no additive); BZA: benzoic acid (0.60%); BC50: Benzocal-50 (0.20%); AGP: antibiotic growth promoter (Carbadox, 50 ppm). Period: period 1 = 7 d; period 2 = 14 d.
bMaximum value for the standard error of the mean.
*,†Means without a common superscript differ after Tukey multiple comparison test, P < 0.05.
Abbreviations: G:F: gain-to-feed.