The Effect of Different Amendments on some Soil Properties, Biomass and Accumulation of Elements in Corn under Industrial Wastewater Irrigation

The aim of this study was to investigate the effect of different amendments on soil properties, mass and accumulation of elements in corn (Zea mays) grown on irrigated soil with wastewater of Bu-Ali industrial region. The green house experiment was conducted with treatments of Gypsum, Citric Acid, farmyard manure and compost separately and as complex, in a completely randomized design with four replicates in Bu-Ali Sina University at 2013. Obtained results showed that the applied different amendments under wastewater irrigated, changed significantly chemical characteristics in the studied soil i.e. pH, EC, CEC, organic matter, CCE, soluble cations. The results also showed that the applied different amendments increased significantly dry and wet mass of corn, in which the maximum and minimum (350.50 and 42.75mg/kg respectively) was in farmyard manure treatment and those amount (74.87 and 10.54mg/kg respectively) observed for control treatment. Applied amendments on irrigated soil with wastewater was effected on heavy metal concentration of shoot corn plants, however it was much less than background in which was not adverse effect on plants. But on root corn plant concentration of Zn and Cd was above background in which was adverse effect on plants. The results showed that maximum and minimum heavy metal concentration in corn plant (root + aerial part) was related to Fe and Cd, respectively. The application of amendments (particularly compost and farmyard manure) and wastewater in soil coincidently, not only increased dry and wet mass of corn via nutrition of plant but also prevented salt and sodic conditions in soil for longer time.