Table 5.
Increased lysine and energy feeding duration prior to parturition on colostrum quality and yield within parity category
| Gilts | Sows | |||||||
|---|---|---|---|---|---|---|---|---|
| Response | Control | Day 113 | Day 107 | SEM | Control | Day 113 | Day 107 | SEM |
| Count, n | 46 | 46 | 45 | — | 113 | 110 | 112 | — |
| Fat,2 % | 5.4 | 5.4 | 5.3 | 0.21 | 4.7a | 4.6ab | 4.4b | 0.13 |
| Protein,% | 14.8 | 14.9 | 15.1 | 0.27 | 15.3 | 14.9 | 15.1 | 0.17 |
| Solids,2 % | 24.7 | 25.3 | 25.1 | 0.36 | 24.6a | 24.1ab | 24.0b | 0.22 |
| Lactose, % | 3.2 | 3.1 | 3.2 | 0.05 | 3.1 | 3.2 | 3.2 | 0.03 |
| IgG,3 mg/mL | 107 | 125 | 105 | 1.6 | 114 | 131 | 126 | 1.3 |
| Colostrum yield,4,6 kg | 5.35 | 5.37 | 5.28 | 0.23 | 5.99 | 6.13 | 6.02 | 0.13 |
| Colostrum intake,5,6 g | 445 | 437 | 436 | 17.0 | 461 | 480 | 460 | 11.0 |
1A total of 467 sows were used from day 106 of gestation until weaning Regimens consisted of: 1) Control: 2.0 kg/d gestation feed (12.5 g SID Lys and 6.5 Mcal ME) until day 113 of gestation, then 2.7 kg/d lactation feed (28 g SID Lys and 9.4 Mcal ME) until parturition; 2) 2.0 kg/d gestation feed (12.5 g SID Lys and 6.5 Mcal ME) until day 113 of gestation, then 3.8 kg/d lactation feed (40 g SID Lys and 13.3 Mcal ME) until parturition; or 3) 3.8 kg/d lactation feed (40 g SID Lys and 13.3 Mcal ME) from day 107 of gestation until parturition. Movement from gestation to farrowing occurred at day 113 (± 2 d) of gestation. Weaning occurred at day 18 to 24 of lactation; 50 mL of colostrum was collected within 3 h from the onset of parturition from multiple teats. Samples were sent to a commercial laboratory (Stearns DHIA Lab, Sauk Centre, MN) and analyzed in duplicate for fat, protein, lactose, and total solids (Combi-Foss milk analyzer, Foss Analytics, Denmark). Immunoglobulin G concentration was analyzed in duplicate using the porcine colostrum IgG ELISA Quantitation Kit (Bethyl Laboratories, Montgomery, TX).
2Significant regimen within parity differences. Values within the parity category without a common superscript differ (P < 0.05).
3Main effect of regimen: control vs. day 113 (P < 0.05).
4Total colostrum intake for the litter.
5Average colostrum intake of a piglet calculated as: −106 + 2.26 WG + 200 BWB + 0.111 D − 1,414 WG/D + 0.0182 WG/BWB, where WG is 24 h piglet weight gain in grams, D is the duration of colostrum suckling in minutes, and BWB is body weight at birth.
6Pig:teat ratio used as a covariate.