Uso de águas residuais na produção de Heliconias em casa de vegetação

Abstract

The use of wastewater in agriculture is shown an alternative with great economic and environmental attractions, since its use in irrigation enables better water resources may be available to the population to more noble uses, in addition, the effluents have proven effective as a source of nutrients to plants. This study aimed to evaluate the feasibility of using treated wastewater of domestic origin for irrigation of Heliconia psittacorum L. cultivar Golden Torch Adrian, evaluating the development and nutritional status of plants and the soil properties. The experiment was conducted in a greenhouse in the trial of the Center for Soil and Water Engineering, Federal University of Bahia Recôncavo (NEAS / UFRB). We used plants of H. Golden adrian with three months of age. The experiment was installed in 5x3 +1 factorial scheme consisting of five levels of irrigation water applied (60, 80, 100, 120 and 140% of class A pan evaporation (ECA)), three types of water (wastewater (AR ) rainwater (AP) and a mixture of 50% AR + 50% PA) and control (soil without fertilizer and 100% receiving ECA rainwater). The experimental design was randomized blocks with five blocks and one repetition per block. The use of AR provided increases in parameters of growth analysis evaluated. The levels of macronutrients in the leaves of plants irrigated with AR behaved similarly to plants that received AP and resulted in increases of micronutrients in the leaves mainly Fe and Mn concentrations above the recommended for the cultivation of heliconia. Irrigation with AR caused an increase in the concentration of sodium in soil and PST, but did not affect the pH and soil acidity when compared with the AP, as well as other chemical attributes evaluated.