Table 6. Effects of dietary Ca concentration and source on growth performance in pig (experiment 2)1)
Ca level/Ca source | Low | Standard | SEM | Ca level | Ca source | Ca level × source |
CaCO3 | CaCl2 | CaCO3 | CaCl2 |
BW (kg) |
Initial | 10.32 | 10.24 | 10.24 | 10.39 | 0.01 | 0.812 | 0.812 | 0.999 |
Final | 26.05c | 27.37b | 27.72b | 29.12a | 0.26 | 0.016 | 0.020 | 0.861 |
Phase 1 (1–14 d) |
ADG (g) | 435c | 468b | 476b | 502a | 5.19 | 0.064 | 0.080 | 0.222 |
ADFI (g) | 696 | 695 | 702 | 698 | 2.28 | 0.182 | 0.258 | 0.795 |
G/F | 0.62 | 0.67 | 0.68 | 0.72 | 0.01 | 0.056 | 0.062 | 0.219 |
Phase 2 (15–28 d) |
ADG (g) | 689c | 755b | 773b | 837a | 13.65 | 0.010 | 0.013 | 0.938 |
ADFI (g) | 1,330 | 1,336 | 1,354 | 1,331 | 9.56 | 0.619 | 0.673 | 0.488 |
G/F | 0.52 | 0.57 | 0.57 | 0.63 | 0.01 | 0.055 | 0.061 | 0.753 |
Overall (1–28 d) |
ADG (g) | 562c | 612b | 624b | 669a | 8.97 | 0.027 | 0.034 | 0.774 |
ADFI (g) | 1,013 | 1,015 | 1,028 | 1,014 | 4.75 | 0.533 | 0.608 | 0.443 |
G/F | 0.55c | 0.60b | 0.61b | 0.66a | 0.01 | 0.023 | 0.025 | 0.858 |
Phase 1: Low, 0.50%; Standard, 0.60%, phase 2: Low, 0.40%; Standard, 0.50%.
Means with different superscripts within a row differ (p < 0.05).
BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; G/F, gain feed ratio.