Table 2.
Effects of different nutrient levels on backfat thickness changes, feed intake and weaning to estrus interval in sows during summer season
| Items | ST1) | HE11) | HE21) | SEM | p-value |
|---|---|---|---|---|---|
| Parity | 3.65 | 3.60 | 3.70 | 0.29 | 0.971 |
| Sow body weight (kg) | |||||
| Gestation, d 109 | 242.4 | 238.7 | 239.4 | 4.70 | 0.838 |
| Weaning (24 d old) | 218.5 | 219.1 | 218.7 | 3.87 | 0.995 |
| Body weight change | −23.93 | −19.64 | −20.67 | 1.49 | 0.119 |
| Sow Backfat thickness (mm) | |||||
| Gestation, d 109 | 20.30 | 19.45 | 20.62 | 0.68 | 0.468 |
| Weanling (24 d old) | 15.40 | 15.50 | 16.40 | 0.53 | 0.348 |
| Backfat thickness change | −4.90 | −3.95 | −4.22 | 0.31 | 0.093 |
| Daily feed intake (kg/d) | 5.04 | 5.19 | 4.91 | 0.14 | 0.395 |
| Daily ME intake (Mcal/d) | 16.64 | 17.66 | 17.20 | 0.48 | 0.342 |
| Weaning-to-estrus interval (d) | 5.05 | 4.75 | 4.85 | 0.32 | 0.798 |
SEM, standard error of means; ME, metabolizable energy.
1)
ST, standard diet, NRC [19]; HE1, high nutrient level 1, ST+3% higher energy and 16.59% protein; HE2, high nutrient level 2, ST+6% higher energy and 17.04% protein.