Determinação da altura de entrada no amendoim forrageiro (Arachis pintoi cv. Amarillo) em pastejo rotacionado

Abstract

To work around the problem of smaller quality of forage available during summer period, the introduction of legumes in to production system is an alternative. In this context stands out the perennial peanut by having good productivity and quality of forage beyond to contribute to nitrogen fixation for the pastoral ecosystem. The objective for this work was studied the productive profile for the perennial peanut (Arachis pintoi cv. Amarillo) grazing for sheep for different entry criteria grazed in environment rotated. The experiment was carried out at the Palma Agricultural Center, Capão do Leão, Rio Grande do Sul (31º 52' S e 52º 29' W). The treatment corresponded of the pre-grazing heights of 14 and 18 cm or 95% of light interception allocated completely randomized design six repetitions. The studied variables were forage mass, percentage of structural components (leaf, stem, dead material and other species), and density of forage mass and for the structural components in the lower and upper strata of the canopy. The data was subject to analysis of variance and the averages ware compared by Duncan test (p<0,05). The entry criterion 18 cm in height despite having a greater forage mass, present lower percent of stems and forage losses. In every criterion, in the upper stratum were find largest leaf density, while in the lower largest stem density. The criteria of entry for animals than grazing 95%IL and 14 cm of height presented the best productive performances, being equivalent. In function of the structural alterations, the extent to which grazing cycles increase the interception of 95% light incident for perineal peanut occurs in lower heights.