Table 12.
The effect of dietary SID-Lys:ME ratio on the weaning-to-estrus interval of sows1 (Exp. 2)
| Item | Parity | No. | SID-Lys:ME ratio, g/Mcal | P-value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.1 | 2.4 | 2.7 | 3.0 | 3.3 | Mean3 | SEM | Treat | Linear | Quadratic | |||
| Weaning to estrus interval, d | 1 | 24 | 7.00b | 6.80b | 5.75a | 5.60a | 5.60a | 6.16x | 0.42 | < 0.01 | < 0.01 | 0.29 |
| 2 | 26 | 6.80 | 6.33 | 5.80 | 5.60 | 5.60 | 6.03x | 0.45 | 0.14 | 0.01 | 0.37 | |
| 3+ | 79 | 5.86c | 5.75bc | 5.41abc | 5.19a | 5.25ab | 5.50y | 0.20 | 0.06 | < 0.01 | 0.51 | |
| Total2 | 129 | 6.44b | 6.23b | 5.73a | 5.51a | 5.55a | 5.89 | 0.17 | < 0.01 | < 0.01 | 0.15 | |
1Data on 129 sows. Sows which did not exhibit estrus within 20 days were excluded (not induced by the treatment effect). The sows were washed out largely caused by other factors (such as leg problems, mastitis)
2Parity effect was included in the model
3Parity effect and treatment effect was included in the model
a, b, cWithin a row, values with no common superscript differ significantly (P < 0.05)
x, yWithin a column, values with no common superscript differ significantly (P < 0.05)