Table 4.
Subsequent lactation performance of primiparous sows fed diets containing 0.29% or 0.92% standardized ileal digestible sulfur amino acids between d90 of gestation and farrowing.
| Item | Dietary Treatment 1 | SEM 2 | p-Value 3 | |
|---|---|---|---|---|
| 0.29 | 0.92 | |||
| No. of sows | 15 | 12 | - | - |
| Sow body weight at farrowing, kg | 197.9 | 193.7 | 3.34 | 0.221 |
| Sow body weight at weaning, kg | 177.1 | 174.0 | 4.36 | 0.488 |
| Sow body weight change, kg 4 | −20.8 | −19.7 | 3.09 | 0.717 |
| Sow average daily feed intake, kg | 4.85 | 4.66 | 0.22 | 0.406 |
| Sow backfat change from late gestation to farrowing 4 | −4.13 | −3.33 | 0.91 | 0.470 |
| Sow backfat change from farrowing to weaning 4 | −1.20 | −1.08 | 0.87 | 0.911 |
| Piglets | ||||
| Born alive, no. | 14.0 | 13.9 | 1.05 | 0.942 |
| Stillborn, no. | 1.33 | 2.00 | 0.71 | 0.357 |
| Mummies, no. | 0.20 | 0.69 | 0.31 | 0.122 |
| Litter size after standardization | 12.7 | 13.0 | 0.93 | 0.709 |
| Litter size at weaning | 11.1 | 10.9 | 0.94 | 0.821 |
| Body weight at birth, kg | 1.49 | 1.44 | 0.08 | 0.476 |
| Body weight at weaning, kg | 6.79 | 6.64 | 0.38 | 0.689 |
| Litter overall average daily gain, kg | 0.260 | 0.266 | 0.02 | 0.720 |
1 Dietary treatments were as follows: 0.29% and 0.92% standardized ileal digestible sulfur AAs, which correspond to 63 or 200% of the estimated SID SAAs requirement for primiparous sows in late gestation (requirements from d 90 to d 114 of gestation, 145 kg of body weight at breeding, expected litter size of 15, and piglet birth weight of 1.35 kg). 2 Maximum value for the standard error of the means. 3 p-values for the t-test procedure between the treatments. 4 Differences refer to the final vs. initial values.