[Phosphorus to dairy cows. Metabolism and requirements in the light of the wish of reduced phosphorus content in faeces and urine]

abonos absorption aliment pour animaux besoin nutritionnel blood plasma bovin laitier brebis calcio calcium cows dairy cattle engrais organique ewes feeds fosforo ganado de leche hormonas hormone hormones lait leche metabolism metabolisme metabolismo milk milk yield muscle muscles necesidades de nutrientes nutritional requirements orina oveja phosphore phosphorus piensos plasma sanguin rendement laitier rendimiento lechero urine vaca vache vitamin d vitamina d vitamine d