[Nitrogen contribution of Desmodium ovalifolium CIAT 350 to its perspective mixture with Brachiaria decumbens]

abonos nitrogenados brachiaria decumbens consommation alimentaire consumo de alimentos contenido de materia seca crop yield desmodium ovalifolium dry matter content feuille fixation de l'azote food consumption grasslands grazing herbage hojas leaves nitrogen fertilizers nitrogen fixation pastoreo peru praderas rendement des cultures rendimiento de cultivos