QUALIDADE AMBIENTAL EM ÁREAS DE FUMO IRRIGADO

The environmental quality of the irrigated areas changes with their time of use, being mainly caused by the quality and management of irrigation water. The objective of this work was to evaluate soil chemical attributes in irrigated tobacco cultivation areas based on soil environmental quality index in the city of Pilões / RN. Samples composed of 6 irrigated areas and 20 simple samples were collected in the native forest area. The values of pH, EC, P, Ca, Mg, Al and H+Al were determined. The averages and standard deviation for the native forest data were calculated, which were used as reference values to obtain the environmental quality index of the irrigated areas. It was concluded that the greatest changes in relation to the native forest were to the EC, with increased salinity of the soil in the irrigated areas, followed by the increase of pH and H+Al.