Cinza vegetal no desenvolvimento produtivo em cultivares de Panicum maximum

Abstract

The state of Mato Grosso has the largest herd of cattle in Brazil, so the areas dedicated to pastures need correct management of grasses, avoiding losses, and obtaining a satisfactory production result. Among the forms of management, an alternative is the use of fertilizer with wood ash, aiming to use this residue safely in the environment. Thus, the objective was to verify the production and the efficiency of water use of cultivars of Panicum Maximum submitted to doses of wood ash grown in Oxisol of the Cerrado. The experimental design was in randomized blocks with a 5x2 factorial arrangement, using five doses of wood ash (0, 8, 16, 24, 32 g dm-3) and two cultivars (BRS cv. Zuri and cv. Mombaça) in six replications. The evaluations were performed every 30 days after emergence (DAE), totaling three cuts, and at 90 days the experiment was completed with the removal of the roots. Productive characteristics, water consumption, and water use efficiency of the experimental units were evaluated at each cut, the pH assessment of the soil was carried out at the beginning of the implantation and at the time of each cut of the plants. The data were submitted to analysis of variance, when significant, the quantitative factor was analyzed by the regression test and the qualitative by the F test. Vegetable ash provided positive effects in all variables analyzed, and it is recommended to use doses between 21,0 and 32,0 g dm-3.