Table 1. Nutrient analysis of the experimental diets1.
| Group (% Ca in DM) | |||||||
|---|---|---|---|---|---|---|---|
| Analysed composition | 0.6 | 0.8 | 1.5 | 1.9 | 2.2 | 2.4 | |
| Dry matter | g/kg | 904 | 917 | 926 | 931 | 921 | 959 |
| Crude protein | g/kg DM | 339 | 352 | 354 | 344 | 342 | 329 |
| Crude fat | g/kg DM | 174 | 166 | 122 | 158 | 173 | 122 |
| Crude fiber | g/kg DM | 12.9 | 15.1 | 7.11 | 7.30 | 5.73 | 13.7 |
| Crude ash | g/kg DM | 44.8 | 49.1 | 73.0 | 87.4 | 98.4 | 107 |
| Calcium | g/kg DM | 6.23 | 7.77 | 15.0 | 19.0 | 22.2 | 24.3 |
| Phosphorus | g/kg DM | 6.02 | 7.56 | 12.7 | 17.3 | 19.9 | 21.6 |
| Calcium:Phosphorus-ratio | 1.03:1 | 1.03:1 | 1.18:1 | 1.10:1 | 1.12:1 | 1.13:1 | |
| Sodium | g/kg DM | 4.08 | 3.88 | 3.75 | 3.69 | 3.53 | 3.52 |
| Potassium | g/kg DM | 6.57 | 5.78 | 6.00 | 6.24 | 5.97 | 5.62 |
| Magnesium | g/kg DM | 0.85 | 0.84 | 0.76 | 0.74 | 0.70 | 0.86 |
| Chloride | g/kg DM | 8.45 | 8.48 | 8.41 | 8.43 | 9.09 | 6.50 |
| Methionine | g/kg DM | 7.34 | 7.64 | 8.01 | 8.21 | 7.71 | 6.77 |
| Cysteine | g/kg DM | 9.40 | 9.76 | 9.82 | 9.38 | 9.47 | 9.29 |
| Metabolizable energy2 | MJ/kg DM | 18.8 | 18.5 | 17.3 | 17.8 | 18.0 | 16.5 |
| Base excess3 | mmol/kg DM | -155 | -218 | -200 | -297 | -332 | -246 |
1Ingredients list: corn (whole grain), wheat (whole grain), dried greaves, corn gluten, animal fat, poultry meal, dried beet pulp, dicalcium phosphate, other minerals, vitamins and digest (hydrolysed meat, dried); The vitamin D3 concentration was 1650 IU/kg diet (according to the manufacturer)
2Calculated according to NRC [11]
3Calculated as follows [20]: Base excess (mmol/kg DM) = 49.9*Ca (g/kg DM) + 82.3*magnesium (Mg) (g/kg DM) + 43.5*sodium (Na) (g/kg DM) + 25.6*potassium (K) (g/kg DM) - 64.6*P (g/kg DM) - 13.4*methionine (g/kg DM) - 16.6*cysteine (g/kg DM) - 28.2*ch1oride (Cl) (mg/kg DM).