TABLE A-15. RECOMMENDED NUTRIENT CONTENT OF DIETS FOR DAIRY HEIFERS (DRY MATTER BASIS)
|
| |
Calf
milk
replacer |
Growing heifers
|
Maximum
tolerable
levels |
Calf
starter |
months of age
|
| 3-6 |
6-12 |
>12 |
|
| Energy |
|
| NEm, Mcal/lb |
1.09 |
0.86 |
0.77 |
0.72 |
0.63 |
| NEg, Mcal/lb |
0.70 |
0.54 |
0.49 |
0.44 |
0.37 |
| ME, Mcal/lb |
1.71 |
1.41 |
1.18 |
1.12 |
1.03 |
| DE, Mcal/lb |
1.90 |
1.60 |
1.37 |
1.31 |
1.22 |
| TDN, % of DM |
95 |
80 |
69 |
66 |
61 |
| Protein equivalent |
| Crude protein, % |
22 |
18 |
16 |
14 |
12 |
| Fiber content (minimum) |
| Crude fiber, % |
|
|
13 |
15 |
15 |
| ADF, % |
— |
— |
16 |
19 |
19 |
| NDF, % |
— |
— |
23 |
25 |
25 |
| NDF, % in DM from fiber |
— |
— |
17 |
19 |
19 |
| Ether extract (minimum), % |
10 |
3 |
3 |
3 |
3 |
| Minerals |
| Calcium, % |
0.70 |
0.60 |
0.52 |
0.41 |
0.29 |
2.00 |
| Phosphorus, % |
0.60 |
0.40 |
0.31 |
0.30 |
0.23 |
1.00 |
| Magnesium, % |
0.07 |
0.10 |
0.16 |
0.16 |
0.16 |
0.50 |
| Potassium, % |
0.65 |
0.65 |
0.65 |
0.65 |
0.65 |
3.00 |
| Sodium, % |
0.10 |
0.10 |
0.10 |
0.10 |
0.10 |
|
| Chloride, % |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
|
| Sulfur, % |
0.29 |
0.20 |
0.16 |
0.16 |
0.16 |
0.40 |
| Iron, ppm |
100 |
50 |
50 |
50 |
50 |
1000 |
| Cobalt, ppm |
0.10 |
0.10 |
0.10 |
0.10 |
0.10 |
10 |
| Copper, ppm |
10 |
10 |
10 |
10 |
10 |
100 |
| Manganese, ppm |
40 |
40 |
40 |
40 |
40 |
1000 |
| Zinc, ppm |
40 |
40 |
40 |
40 |
40 |
500 |
| Iodine, ppm |
0.25 |
0.25 |
0.25 |
0.25 |
0.25 |
50 |
| Selenium, ppm |
0.30 |
0.30 |
0.30 |
0.30 |
0.30 |
2.00 |
| Vitamins |
| Vitamin A, IU/lb |
1700 |
1000 |
1000 |
1000 |
1000 |
30000 |
| Vitamin D, IU/lb |
270 |
140 |
140 |
140 |
140 |
4500 |
| Vitamin E, IU/lb |
18 |
11 |
11 |
11 |
11 |
900 |
|
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Minnesota Extension.
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