Table 3.
The body weight in grams (BW) at d 1, 14, 28, 35, and 42, and feed conversion ratio (FCR), daily feed intake (DFI), and daily weight gain (DWG) measured at 4 time intervals, for animals fed a control diet or a diet supplemented with guar gum, either with or without β-mannanase supplementation at 330 g/ton feed.
| Parameter and period | Control |
GG |
GG + E |
Control vs. GG |
Control vs. GG + E |
GG vs. GG + E |
|---|---|---|---|---|---|---|
| Mean ± standard deviation | Adjusted P value | |||||
| BW 1 d | 42.04 ± 1.10 | 42.31 ± 0.85 | 42.07 ± 0.35 | 0.8103 | 0.9978 | 0.8441 |
| BW 14 d | 490.80 ± 13.23 | 457.60 ± 15.09 | 497.90 ± 12.34 | <0.0001 | 0.4186 | <0.0001 |
| BW 21 d | 961.50 ± 27.68 | 901.20 ± 22.38 | 960.60 ± 29.12 | <0.0001 | 0.9967 | <0.0001 |
| BW 28 d | 1,551 ± 54.27 | 1,428 ± 51.13 | 1,544 ± 12.20 | <0.0001 | 0.9364 | <0.0001 |
| BW 35 d | 2,320 ± 138.30 | 2,038 ± 75.62 | 2,302 ± 112.30 | <0.0001 | 0.9203 | <0.0001 |
| Period 1–14 d | ||||||
| DFI (g/bird) | 35.74 ± 0.96 | 34.66 ± 1.20 | 36.06 ± 1.51 | 0.0997 | 0.8081 | 0.0252 |
| ADG (g/d/bird) | 31.86 ± 0.89 | 29.35 ± 1.22 | 32.43 ± 0.88 | <0.0001 | 0.3721 | <0.0001 |
| FCR | 1.12 ± 0.02 | 1.18 ± 0.03 | 1.11 ± 0.03 | 0.0001 | 0.7025 | <0.0001 |
| Period 15–21 d | ||||||
| DFI (g/bird) | 86.97 ± 3.08 | 85.34 ± 3.07 | 86.09 ± 3.38 | 0.4319 | 0.7808 | 0.8323 |
| ADG (g/d/bird) | 67.16 ± 2.80 | 63.01 ± 2.17 | 65.46 ± 4.76 | 0.0150 | 0.4519 | 0.2028 |
| FCR | 1.29 ± 0.02 | 1.35 ± 0.03 | 1.32 ± 0.05 | 0.0020 | 0.3052 | 0.0782 |
| Period 22–27 d | ||||||
| DFI (g/bird) | 123.80 ± 3.45 | 123.20 ± 7.33 | 124.80 ± 3.68 | 0.9616 | 0.8805 | 0.7368 |
| ADG (g/d/bird) | 84.13 ± 5.17 | 74.90 ± 4.48 | 81.86 ± 3.29 | <0.0001 | 0.4237 | 0.0013 |
| FCR | 1.47 ± 0.06 | 1.64 ± 0.08 | 1.52 ± 0.05 | <0.0001 | 0.1504 | 0.0003 |
| Period 28–35 d | ||||||
| DFI (g/bird) | 165.90 ± 8.06 | 157.30 ± 5.32 | 168.90 ± 8.50 | 0.0202 | 0.5812 | 0.0015 |
| ADG (g/d/bird) | 108.10 ± 12.81 | 85.29 ± 9.53 | 106.10 ± 11.95 | <0.0001 | 0.9115 | 0.0003 |
| FCR | 1.55 ± 0.15 | 1.86 ± 0.160 | 1.60 ± 0.14 | <0.0001 | 0.6454 | 0.0006 |
| Overall 0–35 d | ||||||
| DFI (g/bird) | 83.63 ± 2.46 | 81.24 ± 2.54 | 84.10 ± 2.69 | 0.0720 | 0.8960 | 0.0264 |
| ADG (g/d/bird) | 61.15 ± 3.35 | 53.84 ± 2.51 | 60.22 ± 3.01 | <0.0001 | 0.7248 | <0.0001 |
| FCR | 1.37 ± 0.04 | 1.51 ± 0.04 | 1.39 ± 0.03 | <0.0001 | 0.2643 | <0.0001 |
Values are the means for 12 pens of 21 chickens ± standard deviation of the mean. ANOVA, followed by Tukey multiple comparison test, was used to determine statistical differences among groups.
GG, guar gum; GG + E, guar gum + β-mannanase.