Item | Diet form | Meal | Pellet | SEMb | Contrast P-value | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Corn particle size, μm | 700 | 500 | 300 | 700 | 500 | 300 | Diet form | Particle sizec | Interaction | ||
Intake | |||||||||||
Feed intake, kg/d | 2.72 | 2.62 | 2.73 | 2.66 | 2.61 | 2.60 | 0.18 | 0.254 | 0.684 | 0.197 | |
Orts, kg/d | 0.08 | 0.08 | 0.09 | 0.04 | 0.03 | 0.04 | 0.01 | < 0.001 | 0.328 | < 0.001 | |
GE intake, Mcal/d | 10.66 | 10.15 | 10.69 | 10.53 | 10.36 | 10.28 | 0.72 | 0.628 | 0.693 | 0.340 | |
Fecal excretion | |||||||||||
Dry feces output, kg/d | 0.27 | 0.23 | 0.23 | 0.23 | 0.20 | 0.22 | 0.02 | 0.001 | 0.010 | 0.002 | |
GE in feces, kcal/kg | 4,539 | 4,568 | 4,147 | 4,087 | 3,988 | 3,905 | 61 | < 0.001 | < 0.001 | < 0.001 | |
Fecal GE output, kcal/d | 1,244 | 1,032 | 962 | 924 | 807 | 840 | 60 | < 0.001 | < 0.001 | < 0.001 | |
ATTD of DM, % | 89.87 | 91.25 | 91.39 | 91.38 | 92.23 | 91.69 | 0.38 | 0.004 | 0.019 | 0.019 | |
ATTD of GE, % | 88.26 | 89.70 | 90.89 | 91.08 | 92.22 | 91.79 | 0.45 | < 0.001 | < 0.001 | < 0.001 | |
Urine excretion | |||||||||||
Urine output, kg/d | 6.11 | 5.90 | 6.81 | 4.87 | 5.22 | 5.68 | 0.56 | 0.001 | 0.034 | 0.002 | |
GE in urine, kcal/kg | 33.23 | 33.01 | 29.19 | 34.91 | 35.23 | 35.05 | 2.27 | 0.049 | 0.318 | 0.061 | |
Urine GE output, kcal/d | 206 | 197 | 194 | 170 | 183 | 194 | 22 | 0.075 | 0.583 | 0.108 | |
Heat incrementd | |||||||||||
ME intake, kcal/BW0.6/d | 755 | 725 | 778 | 757 | 763 | 749 | 43 | 0.814 | 0.727 | 0.537 | |
O2 consumption, L/d | 35.64 | 34.65 | 34.81 | 35.74 | 35.55 | 35.38 | 1.90 | 0.239 | 0.275 | 0.530 | |
CO2 production, L/d | 35.62 | 35.55 | 34.87 | 36.36 | 35.90 | 35.96 | 2.97 | 0.091 | 0.266 | 0.083 | |
CH4 production, L/d | -0.05 | -0.04 | -0.07 | -0.06 | -0.08 | -0.04 | 0.05 | 0.479 | 0.942 | 0.839 | |
THP, kcal/d | 4,314 | 4,216 | 4,218 | 4,346 | 4,315 | 4,299 | 254 | 0.166 | 0.250 | 0.361 | |
THP, kcal/BW0.6/d | 358 | 342 | 345 | 350 | 356 | 355 | 23 | 0.182 | 0.440 | 0.759 | |
FHP, kcal/ BW0.6/d | 212 | 201 | 203 | 207 | 218 | 221 | 16 | 0.019 | 0.588 | 0.196 | |
Retained energy, kcal/d | 4,892 | 4,710 | 5,313 | 5,090 | 5,053 | 4,946 | 477 | 0.782 | 0.593 | 0.744 | |
Respiratory quotient, fasted | 0.65 | 0.69 | 0.67 | 0.69 | 0.67 | 0.71 | 0.04 | 0.129 | 0.293 | 0.022 | |
Respiratory quotient, fed | 1.01 | 1.03 | 1.00 | 1.02 | 1.03 | 1.03 | 0.05 | 0.469 | 0.868 | 0.306 | |
Energy in diets, kcal/kg | |||||||||||
DE | 3,459 | 3,477 | 3,560 | 3,599 | 3,667 | 3,633 | 18 | < 0.001 | < 0.001 | < 0.001 | |
ME | 3,385 | 3,402 | 3,488 | 3,535 | 3,596 | 3,559 | 18 | < 0.001 | < 0.001 | < 0.001 | |
NE | 2,735 | 2,739 | 2,838 | 2,857 | 2,957 | 2,926 | 60 | < 0.001 | 0.015 | 0.004 | |
Energy utilization, % | |||||||||||
ME:DE | 97.85 | 97.87 | 97.98 | 98.23 | 98.06 | 97.98 | 0.15 | 0.045 | 0.601 | 0.098 | |
NE:ME | 80.79 | 80.50 | 81.35 | 80.81 | 82.24 | 82.19 | 1.57 | 0.165 | 0.200 | 0.564 |