Major advances in nutrition: relevance to the sustainability of the dairy industry.

@article{Vandehaar2006MajorAI,
  title={Major advances in nutrition: relevance to the sustainability of the dairy industry.},
  author={Michael J Vandehaar and Normand R. St-Pierre},
  journal={Journal of dairy science},
  year={2006},
  volume={89 4},
  pages={
          1280-91
        }
}
The typical cow has a maintenance requirement of about 10 Mcal of net energy for lactation (NEL) per day. Each kilogram of milk takes an additional 0.7 Mcal of NEL. Thus, the cow producing 45 kg of milk per day needs 4 times as much total energy as she needs for her maintenance requirement alone. The elite cow producing 90 kg/d needs 7 times as much total energy as she needs for maintenance alone. Consequently, the efficiency of using feed energy is much greater for the elite cow than it was… CONTINUE READING
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