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Supplements for Beef Cows

Supplements for Beef Cows. Example forage analysis. Supplements for Beef Cows. Estimate DM intake DMI, %BW = (120/%NDF) DMI, %BW = (120/65) = 1.85% BW 1,200 lb cow x 0.0185 = 22.2 lb DMI. Supplements for Beef Cows. Estimate CP intake 22.2 lb DMI x 0.085 = 1.89 lb CP.

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Supplements for Beef Cows

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  1. Supplements for Beef Cows • Example forage analysis

  2. Supplements for Beef Cows • Estimate DM intake • DMI, %BW = (120/%NDF) • DMI, %BW = (120/65) = 1.85% BW • 1,200 lb cow x 0.0185 = 22.2 lb DMI

  3. Supplements for Beef Cows • Estimate CP intake • 22.2 lb DMI x 0.085 = 1.89 lb CP

  4. Supplements for Beef Cows • Estimate TDN intake • TDN, % = 88.9 – (0.779 x %ADF) • TDN, % = 88.9 – (0.779 x 36) • TDN, % = 60.9% • 22.2 lb DMI x 0.609 = 13.5 lb TDN intake

  5. Supplements for Beef Cows • Are requirements being met? • Late gestation requirements CP TDN

  6. Supplements for Beef Cows • Are requirements being met? • Lactation – superior requirements CP TDN

  7. Supplements for Beef Cows • Do I need a protein or energy supplement? • Both contain CP and energy • Difference is relative concentration of CP

  8. Supplements for Beef Cows • Protein supplements usually have 25% CP or higher • Energy supplements usually have less than 15% CP • Calculate first limiting nutrient

  9. Late Gestation • CP supplied/CP required • 1.89 lb/2.0 lb = 0.95 or 95% • TDN supplied/TDN required • 13.5 lb/12.6 lb = 1.07 or 107% • First limiting nutrient is CP

  10. Late Gestation • CP needed = 0.11 lb • Corn gluten feed • 22% CP, 80% TDN • 0.11 lb/0.22 = 0.5 lb corn gluten feed

  11. Lactation – Superior • CP supplied/CP required • 1.89 lb/2.9 lb = 0.65 or 65% • TDN supplied/TDN required • 13.5 lb/15.7 lb = 0.86 or 86% • First limiting nutrient is CP

  12. Lactation – Superior • CP needed = 1.01 lb • Corn gluten feed • 22% CP, 80% TDN • 1.01 lb/0.22 = 4.6 lb corn gluten feed • 4.6 lb x 0.80 = 3.7 lb TDN added

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