[Productive age (longevity) of dairy cows and economical parameters of milk production]

affection podale age aptitud al ordeno bavaria body weight boeuf bovine spongiform encephalopathy breeds (animals) buey bullocks bulls calves complicaciones del parto complication du part contenido proteico culling czech republic dairy cows digestive system diseases edad encefalopatia espongiforme bovina enfermedades de las articulaciones enfermedades de los pies enfermedades del sistema digestivo enfermedades respiratorias esterilidad facteur de production foot diseases heifers infertility intervalle entre parturition intervalo entre partos joint diseases lactation number lipid content longevidad longevity maladie de l'appareil digestif maladie des articulations maladie des glandes mammaires maladie respiratoire mammary gland diseases milk yield milkability novilla parturition complications parturition interval performance de reproduction peso corporal poids corporel precio al productor producer prices production factors protein content race (animal) razas (animales) rendement laitier rendimiento lechero reproductive performance reproductividad respiratory diseases taureau teneur en lipides ternero toro vacas lecheras veau