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Physiological study shows metabolizable energy requirements increase 75% at term in dairy cows, indicating substantial escalation in late-gestation nutritional demands.
Energy balance measurements related the amount of metabolizable energy required by the pregnant cow to the stage of pregnancy. The amount of metabolizable energy required at term was 75% above that of a nonpregnant animal of equal weight. The increase in metabolizable energy requirement during the course of pregnancy was described by the equation y --100.8 + 0.567 e .0zTat where y is kcal ME/kg3/a/day, and t is number of days pregnant.
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Moe et al. (1972) studied this question.
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