Table 5.
Effect of PCA on growth performance of 1- to 52-day-old Chinese Yellow broilers.
| Variable | CK | ER | P300 | P600 | SEM | P-value |
|---|---|---|---|---|---|---|
| 1 to 21 D | ||||||
| BW at day 21 (g) | 536.52 | 536.63 | 541.07 | 521.99 | 3.386 | 0.21 |
| ADFI (g/d) | 39.80 | 39.31 | 38.85 | 38.20 | 0.392 | 0.51 |
| ADG (g/d) | 25.90 | 25.77 | 25.99 | 25.04 | 0.167 | 0.18 |
| F:G (g:g) | 1.60 | 1.63 | 1.59 | 1.62 | 0.007 | 0.24 |
| Mortality (%) | 2.22 | 1.11 | 1.11 | 1.67 | 0.491 | 0.85 |
| 22 to 52 D | ||||||
| BW at day 52 (g) | 2,312.06a | 2,413.61b | 2,421.49b | 2,301.73a,b | 23.252 | 0.04 |
| ADFI (g/d) | 159.18a | 132.69b | 143.14a,b | 152.00a,b | 4.085 | 0.04 |
| ADG (g/d) | 59.16 | 62.02 | 62.18 | 59.43 | 0.672 | 0.23 |
| F:G (g:g) | 2.69a | 2.16b | 2.16b | 2.64a | 0.075 | <0.01 |
| Mortality (%) | 10.00 | 11.67 | 11.67 | 9.44 | 1.220 | 0.90 |
| 1 to 52 D | ||||||
| ADFI (g/d) | 109.60 | 97.95 | 105.60 | 108.75 | 1.978 | 0.01 |
| ADG (g/d) | 45.46 | 46.42 | 46.57 | 44.36 | 0.426 | 0.10 |
| F:G (g:g) | 2.455a | 2.132b | 2.245b | 2.462a | 0.046 | 0.01 |
| Mortality (%) | 12.22 | 12.78 | 12.78 | 11.11 | 1.310 | 0.97 |
a,bMeans with common letters within a main effect do not differ significantly (P < 0.05).
Each value is the mean of 6 replicates.
SEM = standard error of the mean; BW = body weight; ADFI = average daily feed intake; ADG = average daily gain; F: G = feed: gain ratio.