Impact of Municipal Waste Leachate Application on Soil Properties and Accumulation of Heavy Metals in Wheat (Triticum aestivum L)

Making use of any organic matter sources, including municipal waste leachate (MWL) in arid and semi-arid regions like central Iran is very important. The goal of the study was to investigate the effects of municipal waste leachate (MWL) application on soil properties and accumulation of heavy metals in wheat. The treatments consisted of 0 (T1), 150 (T2) and 300 of MWL Ton.Ha-1 (T3). Wheat seedlings were transferred to 4*4m plots. Municipal waste leachate was applied at tillering and panicle stages. In this study, the concentrations of extractable Fe, Mn, Cd and Ni (ppm) in soil under T1 were 2.19, 1.31, 0.06 and 0.30, they (ppm) in soil under T2 were 3.92, 1.99, 0.06 and 0.35, and they (ppm) in soil under T3 were 4.29, 2.18, 0.06 and 0.38, respectively. In the wheat under the treatments, the concentrations of extractable Fe, Mn, Cd and Ni (ppm) in roots under T1 were 1.78, 0.73, 0.007 and 0.007, they (ppm) in roots under T2 were 2.47, 0.97, 0.007 and 0.009, and they (ppm) in roots under T3 were 3.04, 1.10, 0.008 and 0.009, respectively. These results showed that the MWL caused increase of electrical conductivity, total nitrogen, phosphorus, available potassium, DTPA-extractable iron, manganese, cadmium and nickel in soil, and it caused increase of heavy metals in wheat.