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O objetivo deste trabalho foi avaliar características morfogenéticas e taxa de acúmulo de forragem em pastos de capim-Mombaça submetidos a três intervalos de pastejo (28, 38 e 48 dias) entre outubro de 1995 e setembro de 1996. O delineamento experimental foi de blocos ao acaso com arranjo em parcelas subdivididas no tempo. Foram avaliadas as taxas de alongamento e senescência foliar, a taxa de alongamento das hastes, a densidade populacional de perfilhos e a altura do pasto. Essas informações permitiram estimar a taxa de acúmulo líquido de matéria seca. A taxa de alongamento de hastes e folhas seguiu comportamento estacional, sendo mais elevada nos meses de maior temperatura e precipitação. A taxa de senescência foliar foi maior com 48 dias de intervalo de pastejo e praticamente nula entre maio e setembro. O cultivar Mombaça deve ser pastejado com, aproximadamente, 28 dias no período de outubro a maio e 48 dias entre maio e setembro. O manejo do capim-Mombaça não pode ser orientado apenas pelos valores de taxa de acúmulo de matéria seca, sendo necessários estudos sobre as perdas de pastejo e os efeitos da presença das hastes na eficiência de pastejo, consumo e qualidade de forragem, a fim de se determinar melhor o manejo deste capim. The aim of this study was to evaluate morphogenetic characteristics and net herbage accumulation rate in Mombaçagrass pastures under three grazing intervals (28, 38 and 48 days) from October 1995 to September 1996. Trials were set in a split plot randomized block experimental design, with grazing intervals as main plots and periods as subplots. Leaf and stem elongation rates, leaf senescence rate, tiller density and pasture height were evaluated. Net herbage accumulation rate was estimated using tissue turnover data. Leaf and stem elongation rates were higher during the summer and early autumn. Leaf senescence rate was higher on the 48 days grazing interval treatment. There was almost no leaf senescence from May to September. Grazing intervals for Mombaçagrass should be around 28 days from October to May (late spring to early autumn) and 48 days from May to September (late autumn to winter). Mombaça grass management should not be based just on net herbage accumulation rates. Grazing losses due to poor management and excessive stem production which reduces the grazing efficiency, animal intake and forage quality are factors that must be taken into account to improve Mombaçagrass management

Características morfogenéticas e taxa de acúmulo de forragem do capim-Mombaça submetido a três intervalos de pastejo