Item | Treatment1 | SEM | P-value | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
CON | FUM | NPD | FN | Week | FUM | NPD | F × N | F × week | N × week | ||
DMI, kg | 1.70 | 1.70 | 1.81 | 1.70 | 0.080 | 0.005 | 0.465 | 0.511 | 0.495 | 0.190 | 0.958 |
DMP, kg | 1.24 | 1.29 | 1.61 | 1.52 | 0.127 | 0.010 | 0.887 | 0.035 | 0.607 | 0.736 | 0.235 |
FCM, kg | 1.30 | 1.19 | 1.59 | 1.37 | 0.125 | 0.207 | 0.213 | 0.085 | 0.662 | 0.569 | 0.259 |
DMP/DMI | 0.73 | 0.74 | 0.89 | 0.90 | 0.063 | 0.001 | 0.862 | 0.021 | 0.974 | 0.915 | 0.128 |
FCM/DMI | 0.76 | 0.69 | 0.87 | 0.81 | 0.065 | 0.046 | 0.310 | 0.091 | 0.912 | 0.713 | 0.160 |
NEL, MJ/d | 3.77 | 3.41 | 4.45 | 3.84 | 0.349 | 0.171 | 0.183 | 0.131 | 0.724 | 0.628 | 0.213 |
Milk composition, % | |||||||||||
 Fat | 3.90 | 3.24 | 3.41 | 2.91 | 0.189 | 0.001 | 0.008 | 0.045 | 0.683 | 0.505 | 0.208 |
 Protein | 3.87 | 3.65 | 3.26 | 3.20 | 0.168 | 0.001 | 0.412 | 0.007 | 0.633 | 0.963 | 0.029 |
 Lactose | 4.15 | 3.97 | 4.10 | 3.97 | 0.128 | 0.062 | 0.248 | 0.825 | 0.842 | 0.736 | 0.239 |
 MUN, mg/L | 3.92 | 3.89 | 4.03 | 3.50 | 0.172 | 0.157 | 0.125 | 0.435 | 0.161 | 0.238 | 0.997 |
Milk composition yield, g/d | |||||||||||
 Fat | 46.9 | 39.1 | 55.0 | 43.8 | 4.78 | 0.420 | 0.065 | 0.202 | 0.726 | 0.423 | 0.307 |
 Protein | 46.0 | 43.7 | 52.2 | 48.4 | 3.57 | 0.005 | 0.409 | 0.152 | 0.839 | 0.758 | 0.258 |
 Lactose | 52.0 | 52.0 | 65.7 | 60.3 | 0.91 | 0.006 | 0.642 | 0.076 | 0.651 | 0.950 | 0.115 |
Methane emissions | |||||||||||
 CH4, L/d | 32.7a | 26.4b | 28.3b | 25.9b | 0.91 | 0.031 | 0.030 | 0.036 | 0.081 | 0.142 | 0.342 |
 CH4, MJ/d | 1.30a | 1.05a | 1.12a | 1.03a | 0.036 | 0.031 | 0.030 | 0.036 | 0.081 | 0.142 | 0.342 |
 CH4/DMI, L/kg | 19.2a | 15.6b | 15.7b | 15.3b | 0.43 | 0.077 | 0.004 | 0.005 | 0.010 | 0.197 | 0.272 |
 CH4/FCM, L/kg | 26.4 | 23.7 | 18.0 | 19.0 | 2.56 | 0.296 | 0.750 | 0.043 | 0.512 | 0.845 | 0.094 |