The objective was to establish the tolerance to drought and flooding in the production of leaves and stems of three B. brizantha cultivars in Fluvisol. The experiment was conducted in a greenhouse, where the experimental units were plastic pots with capacity of 4.2 dm3. The experimental design was completely randomized in a factorial 3 x 3 with three cultivars of Brachiaria brizantha (Marandu, Piatã and Xaraés) and three water availability, and, waterlogged soil (0 kPa), field capacity (10 kPa, control) and water deficit (50 kPa) with 5 repetitions. The soil used was Entisol. Three cuttings were performed which were evaluated for dry mass of leaves, dry mass of stems and leaf/stem ratio. Data were subjected to analysis of variance by F test, and when significant Tukey test at 0.05 probability was used. The cultivars of Brachiaria brizantha (Marandu, Piata and Xaraés) were susceptible to drought, being the Marandu the only resistant to flooding, with significant development in the three cuttings.
water deficit; Marandu; Piatã; flooded soil; Xaraés
