P values (polynomial contrasts) | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Low protein quality | High protein quality | SEM | Interaction | Low protein quality | High protein quality | Protein concentration | Protein quality | ||||||||
36.7% | 45.0% | 56.1% | 36.2% | 43.3% | 54.9% | Lin. | Quadr. | Lin. | Quadr. | Lin. | Quadr. | ||||
Amount of faeces (g/kg body weight/day) | 2.85 | 3.86 | 3.58 | 2.79 | 2.83 | 3.77 | 0.17 | 0.054 | – | – | – | – | 0.026 | 0.688 | 0.206 |
DM of the faeces (%) | 33.8 | 33.5 | 35.1 | 40.9 | 37.5 | 36.0 | 0.98 | 0.796 | – | – | – | – | 0.339 | 0.984 | 0.012 |
Amount of faeces (g DM/kg body weight/day) | 0.93 | 1.22 | 1.20 | 1.01 | 1.03 | 1.30 | 0.04 | 0.143 | – | – | – | – | 0.023 | 0.767 | 0.907 |
Faecal concentration (mg/g DM) | |||||||||||||||
CP | 453 | 495 | 460 | 407 | 445 | 480 | 6.27 | 0.111 | – | – | – | – | 0.001 | 0.407 | 0.084 |
Ca | 80.0 | 74.3 | 91.1 | 91.6 | 91.1 | 89.0 | 2.52 | 0.496 | – | – | – | – | 0.195 | 0.640 | 0.339 |
P | 35.9 | 36.1 | 40.0 | 42.5 | 43.3 | 42.0 | 0.88 | 0.441 | – | – | – | – | 0.262 | 0.885 | 0.013 |
Mg | 3.81 | 3.78 | 3.48 | 4.06 | 4.07 | 3.79 | 0.06 | 0.792 | – | – | – | – | 0.042 | 0.161 | 0.010 |
K | 3.40 | 3.22 | 2.56 | 3.06 | 2.47 | 2.46 | 0.11 | 0.460 | – | – | – | – | 0.020 | 0.249 | 0.049 |
Na | 3.30 | 3.28 | 3.20 | 2.26 | 2.62 | 2.87 | 0.14 | 0.978 | – | – | – | – | 0.160 | 0.944 | 0.002 |
Ox | 0.84 | 0.78 | 0.79 | 0.96 | 0.83 | 0.75 | 0.02 | 0.141 | – | – | – | – | <0.001 | 0.518 | 0.217 |