Effects of dietary protein supply on caseins, whey proteins, proteolysis and renneting properties in milk from cows grazing clover or N fertilized grass

alimentation amino acids azote bovin calidad casein caseina cattle chemical composition composition chimique cows cuajo feeding ganado bovino grazing lait leche lolium milk milk protein milk yield nitrogen nonprotein nitrogen pastoreo proteine proteins proteolisis proteolyse proteolysis proteosas proteose proteoses quality rendement laitier rendimiento lechero rennet seasonal variation suplementos supplements urea uree vaca vache whey protein