The effects of sward characteristics and supplement type on the herbage intake and milk production of summer-calving cows

alimentation barley beet pulp bovin cattle cebada chemical composition composition chimique cows crude protein cultivos de pasto dietary fibres energy value feed intake feeding fibra de la dieta fibre alimentaire ganado bovino gramineas graminee grasses grazing herbage crops lait leche lolium perenne milk milk production milk yield orge pastoreo plante pour herbage prise alimentaire (animaux) proteina bruta pulpa de remolacha pulpe de betterave rendement laitier rendimiento lechero stems suplementos supplements tallo tige vaca vache