Table 2.
The effect of butyric acid and α-monolaurin, with and without the inclusion of an antibiotic growth promoter, on weekly and overall feed intake of broilers (± standard error of the mean).
| Period | Treatment | Without AGP α | With AGP α | Mean |
|---|---|---|---|---|
| Day 0–7 | No additives | 152.73 (±1.96) | 154.59 (±1.96) | 153.66 (±1.38) |
| Butyric acid # | 156.41 (±1.96) | 157.87 (±1.96) | 157.14 (±1.38) | |
| Monolaurin * | 155.21 (±1.96) | 153.72 (±1.96) | 154.46 (±1.38) | |
| Butyric acid # + Monolaurin * | 158.11 (±1.96) | 155.86 (±1.96) | 156.98 (±1.38) | |
| Mean | 155.61 (±0.98) | 155.51 (±0.98) | ||
| Day 8–14 | No additives | 390.54 b (±3.75) | 391.51 (±3.75) | 391.02 b (±2.65) |
| Butyric acid # | 402.14 a (±3.75) | 397.64 (±3.75) | 399.89 a (±2.65) | |
| Monolaurin * | 397.66 ab (±3.75) | 393.10 (±3.75) | 395.38 ab (±2.65) | |
| Butyric acid # + Monolaurin * | 388.34 b (±3.75) | 394.10 (±3.75) | 391.22 b (±2.65) | |
| Mean | 394.67 (±1.87) | 394.09 (±1.87) | ||
| Day 15–21 | No additives | 858.25 (±15.24) | 828.90 (±15.24) | 843.57 (±10.78) |
| Butyric acid # | 844.12 (±15.24) | 832.51 (±15.24) | 838.31 (±10.78) | |
| Monolaurin * | 836.34 (±15.24) | 843.22 (±15.24) | 839.78 (±10.78) | |
| Butyric acid # + Monolaurin * | 841.23 (±15.24) | 812.37 (±15.24) | 826.80 (±10.78) | |
| Mean | 844.98 (±7.62) | 829.25 (±7.62) | ||
| Day 22–28 | No additives | 967.05 (±14.99) | 978.38 (±14.99) | 972.72 (±10.60) |
| Butyric acid # | 983.43 (±14.99) | 969.90 (±14.99) | 976.67 (±10.60) | |
| Monolaurin * | 966.10 (±14.99) | 967.47 (±14.99) | 966.79 (±10.60) | |
| Butyric acid # + Monolaurin * | 946.50 1 (±14.99) | 992.65 2 (±14.99) | 969.58 (±10.60) | |
| Mean | 965.77 (±7.50) | 977.10 (±7.50) | ||
| Day 29–35 | No additives | 1360.77 b (±25.76) | 1409.19 (±25.76) | 1384.98 ab (±18.21) |
| Butyric acid # | 1443.41 a (±25.76) | 1422.01 (±25.76) | 1432.71 a (±18.21) | |
| Monolaurin * | 1372.37 ab (±25.76) | 1376.30 (±25.76) | 1374.33 b (±18.21) | |
| Butyric acid # + Monolaurin * | 1370.85 b1 (±25.76) | 1438.91 2 (±25.76) | 1404.88 ab (±18.21) | |
| Mean | 1386.85 (±12.88) | 1411.60 (±12.88) | ||
| Day 0–35 | No additives | 3729.33 b (±34.36) | 3762.56 (±34.36) | 3745.95 ab (±24.30) |
| Butyric acid # | 3829.50 a (±34.36) | 3782.28 (±34.36) | 3805.89 a (±24.30) | |
| Monolaurin * | 3727.68 b (±34.36) | 3733.81 (±34.36) | 3730.74 b (±24.30) | |
| Butyric acid # + Monolaurin * | 3705.03 b (±34.36) | 3792.82 (±34.36) | 3748.92 ab (±24.30) | |
| Mean | 3747.89 (±17.18) | 3767.87 (±17.18) |
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 period with a distinctive superscript differ significantly (p < 0.05); 1,2 row means with a distinctive superscript differ significantly (p < 0.05).