Effect of treated wastewater on Soil and Corn Crop in the Tunisian Area

摘要

The reuse of treated wastewater (TWW) led to some consequences on soil, water and plants such as contamination by the toxic traces elements and salts. For this reason, we have carried out an experiment with three small parcels irrigated with TWW and three others irrigated with freshwater (FW). The effect of the TWW on both soil and corn (Zea mays) components is considered. The results showed that the irrigation with TWW increased significantly (P≤0.05) the soil ECe, majors elements contents as Na, Cl, Ca, Mg and fertilizer elements as N, P and K and heavy metals such as Cu, Zn, Co, Cd, Pb and Ni and decreased significantly (P≤0.05) the soil pH. The results on corn plant (Zea mays) showed that irrigation with TWW led to significant increase of these elements on different organs of corn.