ANSC Feeds Practice Exam

What is a key factor influencing the net energy requirements for lactation in beef cattle?

1. Age

2. Amount of milk produced

3. Breed type

4. Time of year

The correct answer is: Amount of milk produced

The amount of milk produced is a critical factor influencing the net energy requirements for lactation in beef cattle because lactation is a highly energy-demanding phase for the animal. Increased milk production directly correlates with higher energy needs, as the cow must mobilize energy reserves and consume sufficient nutrients to support not only her own maintenance but also the nutritional needs of her calves. In practical terms, as milk production rises, the lactating cow requires more energy from her diet to maintain optimal health and body condition, as well as to ensure that the calves receive adequate nutrition through her milk. This dynamic is essential for effectively managing beef cattle nutrition during the lactation period, highlighting the importance of monitoring milk yield when formulating feeding programs. While factors such as age, breed type, and time of year can influence overall energy needs, they do not have as direct or significant an effect on energy requirements specifically during lactation as does the amount of milk produced.