Item | CG | AL | AM | AH | SEM | P-value |
Intake-N (kg/d) | 0.58b | 0.58b | 0.53a | 0.53a | 0.01 | <0.01 |
Milk-N (kg/d) | 0.17ab | 0.17a | 0.17a | 0.15b | 0.01 | 0.12 |
Fecal N (kg/d) | 0.22 | 0.20 | 0.21 | 0.21 | 0.01 | 0.80 |
Urine N (kg/d) | 0.18 | 0.19 | 0.17 | 0.16 | <0.01 | 0.17 |
Urine N + Fecal N (kg/d) | 0.39 | 0.39 | 0.39 | 0.38 | 0.01 | 0.85 |
N balance | 0.60 | 0.65 | 0.60 | 0.60 | 0.01 | 0.23 |
Ratio to intake N |
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Milk-N | 0.29 | 0.30 | 0.32 | 0.29 | 0.01 | 0.12 |
Urine N | 0.31 | 0.34 | 0.32 | 0.31 | 0.02 | 0.59 |
Fecal N | 0.37 | 0.35 | 0.39 | 0.40 | 0.02 | 0.27 |
Urine N + Fecal N | 0.68 | 0.68 | 0.72 | 0.71 | 0.01 | 0.64 |