Development of nitrogen and methane losses in the first eight weeks of lactation in Holstein cows subjected to deficiency of utilisable crude protein under restrictive feeding conditions
Cattle - metabolism, Dietary Proteins - administration & dosage, Nitrogen - metabolism, Lactation, Methane - metabolism, Random Allocation, Diet, Protein-Restricted - veterinary, Animals, Animal Feed - analysis, Milk - secretion, Female, Nitrogen - urine, Diet - veterinary