Utilização do resíduo de etanol de batata-doce (Ipomoea batatas (Lam.)) como fonte de adubação orgânica em Brachiaria brizanth

Abstract

The use of wastes from the production of ethanol has shown significant results on productivity as a source of organic fertilizer, especially in pastures that have a greater areal extent in Brazil, and currently show up, largely in the process of degradation. The study was to evaluate the use of residual ethanol from sweet potatoes as a source of nitrogen in the management of Brachiaria brizantha cv Marandu. The treatments were T1: no fertilization (AS), T2: Chemical fertilization (AQ), T3: organic fertilization (AO): T4: fertilization organic + mineral fertilizer (AQ+O). The parameters evaluated were: number of tillers, plant height, leaf stem, percentage of leaf and stem dry weight (ton / ha) and growth rate (kg/ha.-1/dia). Means were compared by Tukey test at 5% probability. The best result was the AQ+O due to the associative effect of organic and mineral fertilizer providing better conditions for development of the plants of Brachiaria brizantha cv Marandu in closed soils in the state of Tocantins.