ANSC Feeds Practice Exam

Which nutrient is a critical factor for lactating beef cattle diets?

1. Fats

2. Carbohydrates

3. Protein

4. Vitamins

The correct answer is: Protein

The critical factor for lactating beef cattle diets is protein. During lactation, cows have increased nutritional demands to support milk production. Protein plays a vital role in the synthesis of milk, as it is a fundamental building block for the milk proteins necessary for the growth and development of calves. Adequate protein intake is essential not only for the quantity of milk produced but also for its nutritional quality. In lactating beef cattle, a high-protein diet helps to maintain body condition and support reproductive health as well. Protein is also crucial for the overall health of the cow, as it aids in tissue repair and immune function, which can be especially important during the demanding period of lactation. Therefore, ensuring sufficient protein in their diet is paramount for optimizing milk production and maintaining the health of the animal. Other nutrients, while important, do not play as central a role in lactation specifically as protein does. For instance, fats and carbohydrates provide energy but are not as directly involved in the milk composition. Vitamins are essential for overall health but serve more of a supporting role in lactation compared to protein's direct contribution to milk yield and quality.