Estimation of microbial N flow from purine derivative urinary excretion in heep and goats fed diets with different alfalfa hay:concentrate ratios

1. Cantalapiedra-Hijar, G.
2. Molina-Alcaide, E.
3. Ramos, S.
4. Tejido, M.L.
5. Yáñez-Ruiz, D.R.
6. Carro, M.D.