Table 1. Ingredients proportion and chemical composition of the experimental diets.
| Item | Inclusion of canola oil | ||
|---|---|---|---|
| Control | 3% | 6% | |
| Ingredient g/kg of DM | |||
| Ground corn | 297.30 | 261.40 | 225.30 |
| 46%CP Soybean meal | 174.70 | 180.60 | 186.70 |
| NaCl | 5.00 | 4.90 | 4.90 |
| Mineral mixture1 | 13.80 | 13.80 | 13.80 |
| Dicalcium phosphate | 1.10 | 1.40 | 1.40 |
| Urea | 5.00 | 4.90 | 4.90 |
| Limestone | 2.30 | 2.40 | 2.40 |
| Canola oil | - | 30.00 | 60.00 |
| Maize silage | 500.20 | 500.00 | 500.00 |
| Chemical composition, g/kg of DM | |||
| DM | 638.50 | 638.50 | 641.30 |
| MM | 39.00 | 38.80 | 38.60 |
| OM | 960.09 | 961.10 | 961.30 |
| NDF | 299.00 | 296.30 | 293.70 |
| ADF | 184.20 | 183.50 | 182.80 |
| iADF | 69.00 | 68.70 | 68.30 |
| ADL | 35.90 | 35.80 | 35.60 |
| EE | 31.90 | 60.10 | 88.20 |
| CP | 170.50 | 170.20 | 169.90 |
| TC2 | 758.40 | 730.80 | 703.10 |
| NFC3 | 459.30 | 434.40 | 409.40 |
| TDN4 | 669.30 | 691.40 | 727.80 |
| NEl, Mcal/Kg5 | 15.20 | 15.70 | 16.60 |
1Mineral mixture composition per kilogram: 242 g of Ca [minimum (min)], 30 mg of Co (min), 1,008 mg of Cu (min), 80 g of S (min), 390 mg of Fl (max), 39 g of P (min), 60 mg of I (min), 20 g of Mg (min), 2,998 mg of Mn (min), 1,100 mg of monensin sodium (min), 30 mg of Se (min), 4,032 mg of Zn (min), 400,000 IU of vitamin A (min), 40,000 IU of vitamin D3 (min), and 1,450 IU of vitamin E (min). MM = mineral matter; OM = organic matter; NDF = neutral detergent fiber ADF = acid detergent fiber; iADF = indigestible ADF; ADL = acid detergent lignin; EE = ether extract; CP = crude protein
2TC = total carbohydrates [12]
3NFC = no fibrous carbohydrates [13]
4TDN = total digestible nutrients [12]
5NEl = net energy for lactation [11].