Table 1.
Chemical composition (g/kg DM) of individual feedstuffs and lipid supplements used in the experimental diets.
| Parameters 1 | Grass Hay | Grass Silage | Sorghum Grain | Canola Meal | Linseed | Sunflower Seed | Megalac-R® |
|---|---|---|---|---|---|---|---|
| Dry matter | 899 | 279 | 895 | 940 | 945 | 946 | 950 |
| Organic matter | 907 | 912 | 984 | 900 | 966 | 968 | 908 |
| Crude protein | 113 | 124 | 83 | 348 | 194 | 153 | 0 |
| RDP | 50 | 80 | 21 | 209 | 116 | 122 | 0 |
| Ether extract | 18 | 30 | 35 | 32 | 270 | 325 | 824 |
| Starch | 3 | 10 | 683 | 50 | 100 | 15 | 0 |
| NFC | 100 | 248 | 718 | 165 | 0 | 0 | 0 |
| NDF | 676 | 510 | 148 | 355 | 586 | 648 | 0 |
| ADF | 317 | 284 | 45 | 165 | 349 | 397 | 0 |
| ADL | 42 | 43 | 89 | 67 | 213 | 156 | 0 |
| Ca | 2.5 | 5 | 0.5 | 9 | 2 | 3 | 88 |
| P | 2.5 | 3 | 5 | 12 | 7 | 12 | 0 |
| ME(Mcal/kg DM) 2 | 2.1 | 2.1 | 3.0 | 2.6 | 2.7 | 2.1 | 6.0 |
| NEl(Mcal/kg DM) 2 | 1.3 | 1.3 | 1.9 | 1.6 | 1.7 | 1.3 | 5.3 |
| Fatty acids g/100 g fat | |||||||
| C16:0 | 23.0 | 21.0 | 13.0 | 6.1 | 6.6 | 5.8 | 48.0 |
| C18:0 | 3.9 | 4.0 | 2.6 | 1.7 | 4.4 | 3.2 | 5.0 |
| C18:1 | 12.3 | 11.0 | 33.9 | 62.0 | 18.5 | 48.1 | 36.0 |
| C18:2 | 15.7 | 16.8 | 49.5 | 24.0 | 17.2 | 40.1 | 9.0 |
| C18:3 | 32.7 | 30.7 | 0.9 | 5.9 | 53.2 | 0.18 | 0.00 |
1 Dry matter = expressed as fresh matter; RDP = rumen degradable protein; NFC = non-fiber carbohydrates calculated as 100 − (ash + crude protein + ether extract + NDF); NDF = neutral detergent fiber; ADF = acid detergent fiber, ADL = acid detergent lignin; ME = metabolizable energy (Mcal/kg DM); Net energy lactation = NEl (Mcal/kg DM). 2 Calculated from NRC [13].