[Evaluation of the guinea grass (Panicum maximum Jacq.) under different stocking density levels and food supplementation]

carga ganadera cows crossbreds enriquecimiento de los alimentos experimentation food enrichment grazing nutritive value panicum maximum pastoreo productos del cruzamiento produit de croisement rendement rendimiento stocking density taux de charge tropical forests vaca vache valeur nutritive valor nutritivo yields zulia (venezuela)