Table 3 Requirement and supply of energy and protein for different feed groups and diets either as calculated at a nutritional audit on the 29th of January (Metabolisable Energy and Protein) or as calculated during subsequent investigation of poor performance (Net Energy/Protein Digestible in the Small Intestine) on an Irish dairy farm.
From: An investigation into reduced milk production following dietary alteration on an Irish dairy farm
| Â | Â | Metabolisable Energy/Protein3 | Net Energy/Protein Digestible in the Small Intestine4 | |||
|---|---|---|---|---|---|---|
Feed Group | Requirements/Diet | ME (MJ/day) | MP (g/day) | NE (UFL/day) | PDIE (g/day) | PDIN (g/day) |
Early lactation cows1 (estimated yield 32 L2) | Required | 239 | 1849 | 19.38 | 1970 | 1970 |
| Â | Used up to nutritional assessment | 5306 | 2706 | 22.57 | 2543 | 2647 |
| Â | Advised at nutritional assessment5 | 238 | 2177 | 17.13 | 1971 | 2123 |
Late lactation cows1 (estimated yield 16 L2) | Required | 153 | 1039 | 12.34 | 1195 | 1195 |
| Â | Used up to nutritional assessment5 | 234 | 1609 | 17.43 | 1720 | 1625 |
| Â | Advised at nutritional assessment5 | 154 | 1006 | 11.10 | 1028 | 1060 |
Dry cows1 (more than two weeks from calving) | Required | 88 | 436 | NA | NA | NA |
| Â | Used up to nutritional assessment5 | 82 | 479 | NA | NA | NA |
| Â | Advised at nutritional assessment5 | 82 | 479 | NA | NA | NA |
Dry cow1 (within two weeks of calving) | Required | 104 | 501 | NA | NA | NA |
| Â | Used up to nutritional assessment5 | 82 | 479 | NA | NA | NA |
| Â | Advised at nutritional assessment5 | 103 | 581 | NA | NA | NA |