Nutrient and Heavy Metal Concentration and Distribution in Corn, Sunflower, and Turnip Cultivated in a Soil under Wastewater Irrigation

To study the potential uptake and accumulati on of some essential elements and cadmi um, a field experi ment was conducted using three plants (sunflower, turni p, and forage corn in a randomized complete bl ock design (RCBD) with three replicati ons in a soil classified as Typic Haplog ypsids under wastewater irrigation. The experi ment site was selected i n the farmfiel ds located i n Varamin region in southern Tehran, Iran (2005). The results showed that maximum concentrati ons of nitrogen, phosphorus, zinc, copper, and cadmi um in sunflower were 6.05% , 1.27%, 97.27, 22.84 and 0.54 mgkg -1 respecti vel y. The highest accumulati on of nitrogen, phosphorus, zinc, and copper occurred in grain and cadmium in sunfl ower leaves. The maxi mum concentration of potassium and nitrate occurred in turni p leaves, while the maxi mum concentrations of iron and mang anese were recorded in the root and leaves of forage corn, res pecti vel y.