Table 2. Effects of the plane of nutrition on growth performance of the grower pigs
Item | HP | MP | LP | SEM | p-value |
Phase I1) |
Initial Wt (kg) | 23.5b | 24.7a | 23.2b | 0.35 | 0.01 |
Days on feed | 29 | 30 | 32 | - | - |
Final Wt (kg) | 42.6 | 43.5 | 42.7 | 0.45 | 0.44 |
ADG (g) | 663 | 632 | 612 | 15 | 0.25 |
ADFI (g) | 1,172 | 1,307 | 1,293 | 31 | 0.15 |
Gain:feed | 0.566a | 0.483b | 0.474b | 0.009 | < 0.01 |
ME intake (Mcal/d) | 3.91 | 4.31 | 4.21 | 0.10 | 0.19 |
Gain:ME (g/Mcal) | 169.5a | 146.4b | 145.3b | 2.7 | < 0.01 |
Lys intake (g/d) | 14.06 | 14.37 | 12.93 | 0.34 | 0.16 |
Gain:Lys (g/g) | 47.17a | 43.93b | 47.37a | 0.86 | 0.04 |
Phase II2) |
Initial Wt (kg) | 43.1 ± 0.9 | 43.6 ± 0.8 | 43.0 ± 0.9 | - | 0.83 |
Days on feed | 28 | 30 | 31 | - | - |
Final Wt (kg) | 70.8 ± 1.1 | 71.0 ± 1.1 | 73.1 ± 1.1 | - | 0.26 |
ADG (g) | 990 ± 16a | 907 ± 15b | 969 ± 16a | - | < 0.01 |
ADFI (g) | 2,262 | 2,244 | 2,348 | 159 | 0.63 |
Gain:feed | 0.438 | 0.398 | 0.413 | 0.010 | 0.20 |
ME intake (Mcal/d) | 7.56 | 7.47 | 7.63 | 0.53 | 0.90 |
Gain:ME (g/Mcal) | 130.8 | 119.4 | 127.0 | 3.0 | 0.21 |
Lys intake (g/d) | 24.88 | 22.89 | 21.84 | 1.61 | 0.18 |
Gain:Lys (g/g) | 39.78 | 38.97 | 44.36 | 0.99 | 0.10 |
Data are least squares means (LSM) of two replicates (pens) of 34 pigs.
Data are LSM or LSM ± SEM of two replicates of 26 to 34 pigs.
Means with no common superscript within a row differ (p < 0.05).
HP, high plane; MP, medium plane; LP, low plane; SEM, standard error of mean; Wt, weight; ADG, average daily gain; ADFI, average daily feed intake; ME, metabolizable energy.