Table 9.
Growth performance and tibia ash content for chicks in Experiment 31.
| Dietary treatment | Weight gain (g/chick) | Feed intake (g/chick) | Gain:feed (g/kg) | Bone ash3 (mg/tibia) |
|---|---|---|---|---|
| 1. P deficient diet | 263f,g | 409e | 644c,d,e | 296g |
| 2. As 1 + 0.05% KH2PO4 | 290d,e | 447b,c,d | 651b,c,d | 360d,e |
| 3. As 1 + 0.10% KH2PO4 | 313b,c | 486a | 644c,d,e | 440b |
| 4. As 2 + 0.10% Ca from limestone | 279e,f,g | 443b,c,d,e | 630c,d,e | 356d,e,f |
| 5. As 3 + 0.20% Ca from limestone | 299c,d | 459a,b,c | 650b,c,d | 405c |
| 6. As 1 + 12.5% SBM2 | 265e,f,g | 430d,e | 616d,e | 343e,f |
| 7. As 1 + 25% SBM2 | 278f,g | 419b,c,d,e | 663b,c | 360d,e |
| 8. As 1 + 5.0% SDPP2 | 318b | 463a,b | 686b | 406c |
| 9. As 1 + 10.0% SDPP2 | 353a | 486a | 726a | 507a |
| 10. As 1 + 1.0% MBM2 | 261g | 428c,d,e | 612e | 331f |
| 11. As 1 + 2.0% MBM2 | 281d,e,f | 428b,c,d,e | 656b,c | 377d |
| Pooled SEM | 6.7 | 12.3 | 13.7 | 9.7 |
a-gMeans within a column with no common superscript differ significantly (P < 0.05).
1
Values are means of 5 pens consisting of 5 chicks.
2
Abbreviations: SBM = soybean meal, SDPP = spray-dried plasma protein, MBM = meat and bone meal.
3
Multiple regression of tibia ash (Y; mg) on supplemental P intake (g) from KH2PO4 (X1), KH2PO4 + Ca (X2), SBM (X3), SDPP (X4), and MBM (X5) yielded the equation: Y = 299.9 + 285.5 ± 22.1X1 + 234.5 + 23.2X2 + 103.9 ± 16.8X3 + 357.4 ± 18.2X4 + 177.1 ± 25.3X5 (R2 = 0.89). The (±) values are SE of the regression coefficients.