Rendimiento y digestibilidad de la materia seca de variedades de Lolium perenne L. con tres presiones de pastoreo

摘要: An experiment was conducted to evaluate dry matter yield (DMY) from three ryegrass cultivars (Lolium perenne L.)(Barlatra, Talbot and Cropper) under grazing pressures: 3 (high), 6 (medium) 9 (low) kg DM/100 body weight (BW)/day, four periods of one month each (from May August) using Holstein heifers (150 180 kg, initial BW). The experimental design completely randomized with a split-plot arrangement treatments replicates; results were analyzed separately for period. Dry lower (p