Resumo -O objetivo deste trabalho foi o de avaliar o efeito de doses do paraquat e do glyphosate na dessecação da forrageira Brachiaria ruziziensis, na capacidade de rebrota e na formação de biomassa para o sistema de Integração Agricultura-pecuária. O delineamento experimental foi de blocos casualizados com quatro repetições. As doses do glyphosate foram 0, 90, 180, 360, 720 e 1440 g ha -1 e do paraquat foram 0, 50, 100, 200, 400 e 800 g ha -1 . Com base nos resultados obtidos pode-se concluir que o paraquat foi ineficiente na dessecação da B. ruziziensis e que o glyphosate foi eficiente apenas nas doses de 720 e 1440 g ha -1 . Não houve emissão de novos perfilhos após a dessecação com glyphosate das plantas da forrageira que permitisse utilização prática para manejo no sistema Integração Agricultura-pecuária. Palavras-chaves: herbicida, plantio direto, sistemas de integraçãoAbstract -The objective of this study was to evaluate the effect of doses of paraquat and glyphosate on desiccation Brachiaria ruziziensis, the ability of regrowth and formation of biomass for the integration of crop-livestock system. The experimental design was randomized blocks with four replications. The rates glyphosate were 0, 90, 180, 360, 720 and 1440 g ha -1 and paraquat were 0, 50, 100, 200, 400 and 800 g ha -1 . Based on the results obtained it can be concluded that paraquat was ineffective in desiccation B. ruziziensis and the glyphosate was only effective at rates of 720 and 1440g ha -1 . There was no issuance of new tillers after desiccation with glyphosate plant forage to allow practical use for management in integration of croplivestock system.
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