Irrigation by Different Levels of Wastewater and Its Effects on Soil Chemical Properties

Due to the necessity of wastewater reuse in arid regions and the necessity of investigation on the fate of added materials into the soil¡ a field experiment was carried out in 2013 at experimental farm in Kerman city. The treatments were laid out in split plot a Randomized Complete Block Design (RCBD) design with three replications. The treatments were comprised of I1: 100 percent of groundwater¡ I2: 50 percent of groundwater and 50 percent of wastewater and I3: 100 percent of wastewater. Irrigation period was 6 days and lasted for 4 months. Samplings were done for the middle part of furrows in two depths of 0-30 cm and 30-60 cm in every treatment. Results showed the reduction of pH¡ and increment of salinity¡ phosphate phosphorus¡ nitrate nitrogen and heavy metals of using wastewater compare to groundwater. Moreover¡ the results indicate the increasing of accumulation of heavy metals in soil depth applying furrow irrigation in comparison to drip irrigation.