Table 2.
Means of body weight gain (BWG), feed intake (FI), feed conversion ratio (FCR) and abdominal fat (Fat) according to TSAA levels.
|
Age (wk) |
Traits | TSAA levels (%)1 |
P-value |
Maximum response (%) | R2 | SE | |||
|---|---|---|---|---|---|---|---|---|---|
| 70% | 85% | 100% | ANOVA | Regression2 | |||||
| 1–6 | BWG (g) | 289.98 | 333.813 | 341.003 | <0.0001 | 0.0013Q | 94.46 | 0.87 | 5.8413 |
| FI (g/bird/d) | 19.28 | 19.44 | 19.32 | NS | NS | - | - | 0.1000 | |
| TSAA intake (mg/bird/d) | 132.00 | 155.503 | 180.673 | <0.0001 | <0.0001L | - | 0.96 | 0.0048 | |
| FCR (g/g) | 2.80 | 2.453 | 2.383 | <0.0001 | <0.0001Q | 99.08 | 0.93 | 0.0456 | |
| 7–12 | BWG (g) | 387.42 | 460.443 | 470.123 | <0.0001 | 0.0030Q | 94.77 | 0.83 | 9.7944 |
| FI (g/bird/d) | 48.15 | 49.92 | 48.60 | NS | NS | - | - | 0.4912 | |
| TSAA intake (mg/bird/d) | 303.50 | 359.673 | 355.003 | <0.0001 | <0.0001L | - | 0.53 | 0.0069 | |
| FCR (g/g) | 4.35 | 3.803 | 3.623 | <0.0001 | 0.0359Q | 104.18 | 0.81 | 0.0840 | |
| 13–18 | BWG (g) | 422.26 | 451.333 | 447.983 | 0.0273 | 0.0266L | - | 0.25 | 5.1014 |
| FI (g/bird/d) | 64.22 | 67.14 | 64.97 | NS | 0.0243Q | 86.15 | 0.31 | 0.5407 | |
| TSAA intake (mg/bird/d) | 356.33 | 460.003 | 471.003 | <0.0001 | 0.0001Q | 96.75 | 0.95 | 0.0128 | |
| FCR (g/g) | 5.32 | 5.21 | 5.08 | NS | 0.0408L | - | 0.25 | 0.0477 | |
Abbreviations: BWG, body weight gain; FCR, feed conversion ratio; FI, feed intake; NS, Not significant; TSAA, total sulfur amino acid.
N = 6.
1
70, 85, and 100% of TSAA are correspondent to: 0.58/0.71/0.83% from 1 to 6 wk; 0.53/0.64/0.75% from 7 to 12 wk; 0.47;0.52/0.57;0.63/0.67;0.74% from 13 to 18 wk, respectively.
2
Linear (L) or Quadratic (Q).
3
Means differ from 70% of TSAA by Dunnett test (P ≤ 0.05).