Table 1.
The effect of butyric acid and α-monolaurin, with and without the inclusion of an antibiotic growth promoter, on weekly body weight (g) of broilers (± standard error of the mean).
| Period | Treatment | Without AGP α | With AGP α | Mean |
|---|---|---|---|---|
| Day 0 | No additives | 42.27 (±0.09) | 42.34 (±0.09) | 42.31 (±0.06) |
| Butyric acid # | 42.39 (±0.09) | 42.25 (±0.09) | 42.32 (±0.06) | |
| Monolaurin * | 42.28 (±0.09) | 42.26 (±0.09) | 42.27 (±0.06) | |
| Butyric acid # + Monolaurin * | 42.26 (±0.09) | 42.28 (±0.09) | 42.27 (±0.06) | |
| Mean | 42.30 (±0.04) | 42.28 (±0.04) | ||
| Day 7 | No additives | 186.43 b (±2.31) | 191.52 (±2.31) | 188.98 ab (±1.63) |
| Butyric acid # | 193.17 a (±2.31) | 193.69 (±2.31) | 193.43 a (±1.63) | |
| Monolaurin * | 187.96 ab (±2.31) | 189.12 (±2.31) | 188.54 b (±1.63) | |
| Butyric acid # + Monolaurin * | 190.77 ab (±2.31) | 192.16 (±2.31) | 191.47 ab (±1.63) | |
| Mean | 189.58 (±1.15) | 191.62 (±1.15) | ||
| Day 14 | No additives | 489.75 b1 (±3.91) | 501.15 2 (±3.91) | 495.45 b (±2.77) |
| Butyric acid # | 503.79 a (±3.91) | 506.45 (±3.91) | 505.12 a (±2.77) | |
| Monolaurin * | 496.69 ab (±3.91) | 503.54 (±3.91) | 500.11 ab (±2.77) | |
| Butyric acid # + Monolaurin * | 498.39 ab (±3.91) | 496.87 (±3.91) | 497.63 ab (±2.77) | |
| Mean | 497.16 (±1.96) | 502.00 (±1.96) | ||
| Day 21 | No additives | 1089.58 (±9.71) | 1092.69 (±9.71) | 1091.13 (±6.87) |
| Butyric acid # | 1090.87 (±9.71) | 1106.07 (±9.71) | 1098.47 (±6.87) | |
| Monolaurin * | 1090.74 (±9.71) | 1100.15 (±9.71) | 1095.45 (±6.87) | |
| Butyric acid # + Monolaurin * | 1095.00 (±9.71) | 1086.64 (±9.71) | 1090.82 (±6.87) | |
| Mean | 1091.55 (±4.86) | 1096.39 (±4.86) | ||
| Day 28 | No additives | 1731.80 (±13.55) | 1750.60 (±13.55) | 1741.20 b (±9.58) |
| Butyric acid # | 1742.71 (±13.55) | 1774.25 (±13.55) | 1758.48 ab (±9.58) | |
| Monolaurin * | 1764.95 (±13.55) | 1776.23 (±13.55) | 1770.59 a (±9.58) | |
| Butyric acid # + Monolaurin * | 1736.45 (±13.55) | 1748.33 (±13.55) | 1742.39 b (±9.58) | |
| Mean | 1743.98 (±6.77) | 1762.35 (±6.77) | ||
| Day 35 | No additives | 2436.13 (±22.54) | 2467.31 (±22.54) | 2451.72 (±15.94) |
| Butyric acid # | 2465.89 (±22.54) | 2491.28 (±22.54) | 2478.58 (±15.94) | |
| Monolaurin * | 2469.47 (±22.54) | 2498.76 (±22.54) | 2484.12 (±15.94) | |
| Butyric acid # + Monolaurin * | 2440.57 (±22.54) | 2447.79 (±22.54) | 2444.18 (±15.94) | |
| Mean | 2453.01 (±11.27) | 2476.28 (±11.27) |
α Antibiotic growth promoter: zinc bacitracin 15% (0.5 g/kg); # Novyrate® C (starter 1 g/kg, grower 0.75 g/kg, finisher 0.25 g/kg); * FRA® C12 Dry (1 g/kg); a,b column means per day with a distinctive superscript differ significantly (p < 0.05); 1,2 row means with a distinctive superscript differ significantly (p < 0.05).