[Correct preparative feeding of dairy cows - the key for optimal fertility]

alimentation des animaux animal feeding besoin nutritionnel calcio calcium cetose cetosis dairy cows dry period energia energie energy fatty degeneration feed intake fosforo hipocalcemia hypocalcaemia ketosis necesidades de nutrientes nutritional requirements oligoelementos phosphore phosphorus prise alimentaire (animaux) trace elements vacas lecheras vitaminas vitamine vitamins