Table 3.
Effects of TM plus Met and lowering Lys dietary treatments provided (90 d) to rearing gilts (from 58.0 ± 11.1 kg to 151 ± 14.1 kg of BW) on lameness during rearing and sow productive phases
| Control1 | TM plus Met1 | P-value | ||||||
|---|---|---|---|---|---|---|---|---|
| Standard Lys2 |
Low Lys2 |
Standard Lys2 |
Low Lys2 |
SEM | Min Met |
Lys | MinMet × Lys |
|
| Gilts, n | 59 | 58 | 56 | 57 | ||||
| BW at lameness, kg | 120.2 | 119.8 | 134.2 | 144.4 | 7.75 | 0.016 | 0.515 | 0.456 |
| Age at lameness, d | 173.8 | 175.8 | 185.3 | 198.2 | 6.92 | 0.034 | 0.346 | 0.462 |
| Lameness, % | ||||||||
| During rearing3 | 6.67 | 8.33 | 10.0 | 6.67 | 19.530 | 0.775 | 0.834 | 0.456 |
| Early gestation4 | 15.5 | 22.6 | 14.1 | 17.6 | 14.98 | 0.587 | 0.309 | 0.746 |
| Late gestation5 | 15.6 | 12.1 | 7.10 | 10.6 | 17.76 | 0.246 | 0.859 | 0.421 |
| Lactation6 | 17.1 | 19.1 | 8.88 | 15.8 | 16.04 | 0.211 | 0.304 | 0.503 |
| Overall | 20.5 | 32.8 | 19.6 | 24.0 | 13.49 | 0.447 | 0.532 | 0.625 |
| Gait score, 0–2 | ||||||||
| During rearing | 0.15 | 0.13 | 0.15 | 0.15 | 0.052 | 0.854 | 0.789 | 0.152 |
| Early gestation | 0.22 | 0.29 | 0.19 | 0.18 | 0.124 | 0.272 | 0.763 | 0.486 |
| Late gestation | 0.19 | 0.17 | 0.09 | 0.12 | 0.057 | 0.140 | 0.742 | 0.587 |
| Lactation | 0.24 | 0.26 | 0.11 | 0.21 | 0.096 | 0.108 | 0.222 | 0.344 |
| Overall | 0.19 | 0.23 | 0.14 | 0.15 | 0.046 | 0.284 | 0.681 | 0.871 |
| Severity, % | ||||||||
| During rearing | – | – | – | – | – | – | – | – |
| Early gestation | 39.1 | 31.2 | 21.5 | 7.76 | 16.40 | 0.185 | 0.439 | 0.792 |
| Late gestation | 24.4 | 54.3 | 25.0 | 16.7 | 21.26 | 0.364 | 0.956 | 0.630 |
| Lactation | 47.0 | 67.7 | 42.9 | 32.8 | 22.90 | 0.410 | 0.607 | 0.793 |
| Overall | 66.7 | 53.8 | 46.1 | 38.8 | 17.01 | 0.360 | 0.716 | 0.534 |
| All severe cases, % | 13.7 | 17.3 | 8.88 | 10.6 | 21.80 | 0.726 | 0.449 | 0.449 |
1Control, basal diet and TM plus Met (MinMet), with additional 10, 20, and 50 mg/kg of chelated cooper, manganese, and zinc, respectively (0.1%; Aplomotec Plus, Tecnología & Vitaminas, S.L., Alforja, Spain) and increased Met:Lys ratio as 1.01.
2Standard Lys provided 165 CP/kg with 10.0 g Lys/kg between 119 and 163 d of age and 140 g CP/kg with 8.0 g Lys/kg between 164 to 209 d of age; or low Lys, set first to 155 g CP/kg with 8.1 g Lys/kg and second phase to 140 g CP/kg with 6.5 g Lys/kg.
3During the rearing phase, lameness was evaluated for 60 gilts per dietary treatment; for other measurements, it is indicated in the table.
4Evaluated at service and at 28 d of gestation.
5Evaluated at 109 d of gestation.
6Evaluated at weaning.