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.