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Energy and the Performance Horse
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Dietary energy considerations
Dietary energy for horses is usually expressed in terms of megacalories (Mcal) or megajoules (MJ) of digestible energy. Digestible energy (DE) refers to the amount of energy in the diet that is absorbed by the horse. Digestible energy requirements are calculated based on the horse’s maintenance DE requirement plus the additional energy expended during exercise. Basically, DE can be provided by four different dietary energy sources: starch, fat, protein and fiber.
Starch
Starch, a carbohydrate composed of a large number of glucose molecules, is the primary component of cereal grains, making up 50 to 70% of the grain’s dry matter. Of the grains commonly fed to horses, corn has the highest starch content. Starch is a versatile energy source for the performance horse. Horses break down starch into glucose units in the small intestine, where it is absorbed into the blood. […]
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