Effect of Fly Ash Combination with Inorganic Fertilizer and FYM on Micronutrient Availability and Heavy Metal Accumulation in Entisol

摘要

Field experiment were conducted in farmer field around National Thermal Power Corporation (NTPC) Tilda, Raipur (Chhattisgarh) during kharif season of 2013 to evaluate different doses of fly ash (20, 40, 601 ha~(-1)) combination with and without organic fertilizer on micronutrient (Zn, Cu, Mn, Fe) and heavy metal (Co, Pb, Ni, Cr) content in soil. Application of increasing doses fly ash with FYM was found to increase micronutrient availability and the highest recorded under application of 75% GRD +401ha~(-1) fly ash + 5 t FYM ha~(-1) and tended to marginal decrease micronutrient content 601 fly ash ha'. Increasing trend of micronutrients in soil due to application of fly ash were recorded, the permissible limits. Metal content in soil increased withincrease application of ash that the concentrations of trace elements of crops. Higher soil heavy metal content of soil recorded in fly ash applied without organic fertilizer. Concentration of heavy metals in soils increased due to application of fly ash@ 601 ha~(-1). However, the combined application of fly ash 201 fly ash ha~(-1) with FYM resulted inlower concentration. The analysis of fly ash amendment soils and the produce rice grown, the concentration level of heavy metal element are well within the permissible and safe limit even after the application of fly ash at higher dose 401 ha~(-1) to thesoil.