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O objetivo deste trabalho foi avaliar a estrutura do dossel, em pastagens de Brachiaria brizantha cultivar Marandu submetidas a quatro ofertas de lâminas foliares. A espécie forrageira foi semeada em janeiro de 2001, na área experimental da Embrapa Agropecuária Oeste, Dourados, MS, e as pastagens foram submetidas às ofertas de forragem de 4, 8, 12 e 16% (quilogramas de lâminas foliares verdes por 100 kg de peso vivo por dia). O delineamento experimental foi o de blocos ao acaso, com duas repetições. As unidades experimentais foram avaliadas mensalmente, de outubro de 2002 a maio de 2003, de outubro de 2003 a junho de 2004 e de novembro de 2004 a junho de 2005. As ofertas de forragem foram mantidas sob regime de lotação contínua. A massa de lâminas foliares verdes e a altura do dossel apresentaram aumento linear com o aumento das ofertas de lâminas. As regressões oferta de lâminas foliares, taxa de acúmulo de lâminas foliares e matéria seca de raízes não foram significativas. A massa de lâminas foliares e altura do dossel aumentam com a oferta. The objective of this work was to evaluate the sward structure of Brachiaria brizantha cultivar Marandu pastures in response to leaf blade allowance. The forage grass was sown in January 2001, at Embrapa Agropecuária Oeste, Dourados, MS, Brazil and the allowances were 4, 8, 12 and 16% (kilograms of leaf blade per 100 kg of live weight per day). The experimental design was complete randomized blocks, with two replicates. The pasture was monthly evaluated during from October 2002 to May 2003, October 2003 to June 2004 and November of 2004 to June of 2005. The allowances were kept constant with put-and-take animals and continuous stocking grazing. The leaf blade mass and sward height increased linearly as a function of leaf blade allowance. The leaf blade accumulation rate and the root dry matter did not respond to the increase of allowance. The leaf blade mass and sward height vary with leaf blade allowance

Estrutura do dossel em pastagens de capim-marandu submetidas a quatro ofertas de lâminas foliares