ANSC Feeds Practice Exam

What happens to the energy requirement of a cow during lactation compared to non-lactating?

1. It decreases significantly

2. It increases significantly

3. It remains the same

4. It fluctuates based on feed availability

The correct answer is: It increases significantly

During lactation, a cow's energy requirements increase significantly in order to support the production of milk. The process of lactation is energetically demanding, as a substantial amount of energy is needed to synthesize milk and sustain overall health and productivity. This increase in energy requirement is directly proportional to the amount of milk the cow is expected to produce; therefore, lactating cows require a carefully balanced diet that provides adequate energy, protein, vitamins, and minerals to meet their nutritional needs. The other options are less applicable to the context: - A decrease in energy needs during lactation is not accurate, as the cow's body is working harder to produce milk. - The energy requirements do not remain the same, given the physiological changes and demands associated with milk production. - While feed availability can affect the diet's quality and quantity, the fundamental increase in energy requirements during lactation remains consistent regardless of fluctuations in feed availability.