Accumulation of heavy metals in the soil and agricultural crops

¹ Karshi Engineering and Economic Institute, Uzbekistan
² Karshi Branch of the Tashkent University of Information Technologies named after Muhammad Al- Khwarizmi, Uzbekistan

^* Corresponding author: uzakovzafar40@gmail.com

Abstract

This article presents the results of studies of the accumulation of heavy metals in irrigated soils and crops grown in fields contaminated with heavy metals in a territory that has not previously been studied and its ecological state has not been assessed. The accumulation of heavy metals in irrigated soils and crops Panicum L-millet, Solanum lycopersicum - tomato, Citrullus lanatus - watermelon, Cucumis melo - melon, Capsicum annuum - bell pepper was determined. Based on the amount of accumulated elements of heavy metals Cr, Ni, Cd, Pb, Mn, Cu, As in soil and crops, an assessment of their ecological state was carried out. The following accumulation of heavy metals in soil incisions is established: the cadmium (Cd) element accumulates in a small amount, lead (Pb) - 15.2 mg/kg, nickel (Ni) - 34.2 mg/kg, chromium (Cr) - 43.3 mg/kg. From agricultural crops in the ears of millet manganese (Mn) accumulates in the amount of 12.63 mg/kg, copper (Cu) - 9.79 mg/kg, cadmium (Cd) - 0.068 mg/kg, lead (Pb) - 0.48 mg/kg, chromium (Cr) - 0.99 mg/kg, nickel (Ni) -2.92 mg/kg, arsenic (As) - 0.98 mg/kg; from vegetable and melon crops in the fruit of bell pepper cadmium (Cd) is contained in an amount of 0.077 mg/kg, lead (Pb) - 0.35 mg/kg, nickel (Ni) - 3.26 mg/kg, arsenic (As) -5.33 mg/kg. Since the content of heavy metal elements Ni, Cr, Cd and As in the studied crops exceed the maximum allowable concentrations, it is not recommended to grow vegetables and melons in such fields.