Calculations for Ration Balancing Step 1. Determine horse’s diet (weigh feed, kg

Question

Calculations for Ration Balancing
Step 1. Determine horse’s diet (weigh feed, kg = lbs / 2.2):
Example: 7.5 kg timothy hay and 6.5 kg commercial grain
Step 2. Determine nutrient concentration of feedstuffs (Appendix Table 6)

Step 3. Calculate quantity of energy in horse’s diet
7.5 kg timothy hay X 1.77 Mcal DE/kg = 13.275 Mcal
6.5 kg grain X 4.08 Mcal DE/kg = 26.52 Mcal
Total DE intake = 13.275 + 26.52 = 39.785 Mcal/day

Step 4. Calculate quantity of protein in horse’s diet
(7.5 kg timothy hay X (8.6/100)) X 1000 = 645 g protein
(6.5 kg grain X (12/100)) X 1000 = 780 g protein
Total protein intake = 645 + 780 = 1425 g protein

Step 5. Calculate quantity of calcium in horse’s diet
(7.5 X 0.0043) X 1000 = 32.25 g calcium
(6.5 X 0.01) X 1000 = 65 g calcium
Total calcium intake = 32.25 + 65 g = 97.25 g calcium/day

Step 6. Compare to horse’s nutrient requirements from Appendix Table 4 (divide diet nutrient by requirement and multiply by 100)

Conclusions:
1)Diet is excess in energy
2)Diet is adequate in crude protein
3)Diet is highly excess in calcium – assume moderate availability as most of calcium coming from grain (no alfalfa hay in diet)

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