The effect of concentrate type and supplementary lactic acid or soya oil on milk production characteristics in dairy cows offered grass silages of contrasting fermentation type

aceite de soja acide lactique alimentation amidon chemical composition composition chimique concentrates dairy cows dietary fibres digestibilidad digestibility ensilado ensilage (produit) ensilage (traitement) ensilaje feed grasses feeding fermentation fibra de la dieta fibre alimentaire grasa de la leche huile de soja lactic acid lait leche milk milk fat milk protein milk yield piensos concentrados rendement laitier rendimiento lechero silage silage making soybean oil starch suplementos supplements vacas lecheras