Table 3.
The effect of dietary ME level on sow body weight change in lactation (Exp. 1)
| Item | Parity | No. | ME level, Mcal/kg | P-value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.06 | 3.16 | 3.20 | 3.25 | 3.30 | 3.40 | Mean13 | SEM | Treat | Linear | Quadratic | |||
| Initial sow body weight, kg | 1 | 36 | 202.6 | 208.9 | 205.8 | 209.4 | 201.6 | 214.3 | 206.8x | 6.0 | 0.70 | -- | -- |
| 2 | 36 | 235.3 | 231.9 | 222.6 | 224.2 | 239.0 | 214.1 | 227.3y | 7.7 | 0.19 | -- | -- | |
| 3+ | 113 | 273.8 | 264.1 | 277.6 | 274.6 | 274.2 | 279.9 | 274.0z | 5.8 | 0.51 | -- | -- | |
| Overall2 | 185 | 255.9 | 252.7 | 256.6 | 255.9 | 257.5 | 258.5 | 256.2 | 6.5 | 0.91 | -- | -- | |
| Sow body weight at weaning, kg | 1 | 36 | 178.5 | 185.3 | 188.4 | 190.5 | 181.9 | 194.3 | 186.3x | 6.1 | 0.48 | 0.12 | 0.87 |
| 2 | 36 | 217.2 | 211.8 | 207.7 | 210.2 | 223.5 | 196.0 | 210.7y | 7.8 | 0.19 | 0.20 | 0.39 | |
| 3+ | 113 | 258.6 | 250.2 | 264.1 | 260.7 | 260.0 | 264.4 | 259.6z | 6.0 | 0.61 | 0.32 | 0.73 | |
| Overall2 | 185 | 238.7 | 236.4 | 242.3 | 241.3 | 242.3 | 241.9 | 240.5 | 6.9 | 0.83 | 0.80 | 0.91 | |
| Sow body weight change, kg1 | 1 | 36 | -24.3a | -23.5ac | -17.5b | -18.8bc | -20.0ab | -19.7ab | -19.7x | 1.9 | 0.06 | 0.07 | 0.08 |
| 2 | 36 | -18.0ab | -20.0a | -14.9bc | -14.0bc | -15.4bc | -18.2ab | -16.2y | 1.6 | 0.07 | 0.51 | 0.07 | |
| 3+ | 113 | -15.2 | -13.6 | -13.6 | -13.9 | -14.2 | -15.7 | -14.8y | 1.0 | 0.65 | 0.80 | 0.10 | |
| Overall2 | 185 | -17.2a | -16.3ab | -14.3b | -14.6bc | -15.2ab | -16.6ac | -15.7 | 0.9 | 0.06 | 0.56 | 0.01 | |
1Initial sow body weight was used as a covariate in the analysis
2Parity effect was included in the model
3Parity effect; treatment effect was included in the model
a, b, cWithin a row, values with no common superscript differ significantly (P < 0.05)
x, y, zWithin a column, values with no common superscript differ significantly (P < 0.05)