Table 2.
Effects of different levels of capsaicin on the growth performance of broilers.
| Item | Control | Dietary capsaicin level (mg/kg) | SEM | P -value | ||||
|---|---|---|---|---|---|---|---|---|
| 2 | 4 | 6 | ANOVA | Linear | Quadratic | |||
| Days 1–21 | ||||||||
| ADG (g/bird per day) | 36.08 | 35.01 | 35.36 | 35.00 | 0.164 | 0.060 | 0.043 | 0.251 |
| ADFI (g/bird per day) | 45.80 | 44.04 | 45.33 | 44.02 | 0.313 | 0.091 | 0.133 | 0.701 |
| F/G (g/g) | 1.27 | 1.26 | 1.28 | 1.26 | 0.006 | 0.407 | 0.786 | 0.597 |
| Days 22–42 | ||||||||
| ADG (g/bird per day) | 90.82 | 92.08 | 96.81 | 87.49 | 1.377 | 0.111 | 0.653 | 0.052 |
| ADFI (g/bird per day) | 151.71 | 144.41 | 147.80 | 140.51 | 1.815 | 0.156 | 0.063 | 0.999 |
| F/G (g/g) | 1.68a | 1.57ab | 1.53b | 1.61ab | 0.016 | 0.006 | 0.057 | 0.002 |
| Days 1–42 | ||||||||
| ADG (g/bird per day) | 63.45 | 63.55 | 66.07 | 61.24 | 0.706 | 0.112 | 0.498 | 0.076 |
| ADFI (g/bird per day) | 99.94 | 95.51 | 98.07 | 93.34 | 1.152 | 0.194 | 0.095 | 0.949 |
| F/G (g/g) | 1.57a | 1.50b | 1.49b | 1.52ab | 0.010 | 0.007 | 0.038 | 0.004 |
ADG, average daily gain; ADFI, average daily feed intake; F/G, feed to gain ratio. Values are presented as the mean with SEM (n = 8). Means with unlike superscript letters in the same row are significantly different (P < 0.05).