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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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