Estimates for Nutrient Requirements

The National Research Council of the National Academies provides documents on nutrient requirements of animals. The estimates provided in the tables in this Fact Sheet are based on recommendations from the National Research Council. Tables 1 through 5 display how nutrient requirements are expected to change with differences in body size or production. The tables display estimates for requirements of digestible energy, crude protein, and several minerals and vitamins.

Size of HorseDigestible Energy (Mcal/day)Crude Protein (pounds)Calcium (grams)Phosphorus (grams)
Maintenance (1,000 pounds)151.21813
Maintenance (1,100 pounds)16.51.42014
Maintenance (1,200 pounds)181.52215

Nutrient requirements are estimated from the National Research Council’s Recommendations for Nutrient Requirements of Horses (2007). Mcal is megacalories (1,000 Calories), a unit of energy potential.

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