Features of the intake of trace elements with flood sediments on reclaimed lands of the floodplain agricultural landscape under conditions of technogenesis

The aim of the research was to study the features of the influx of trace elements with flood sediments onto reclaimed lands of the floodplain agricultural landscape under technogenesis conditions. Long-term studies were carried out on arable floodplain reclaimed lands located near the city of Ryazan. Sediments were collected according to the author’s method using sediment traps. Laboratory analysis of the selected samples of flood sediments and alluvial soil to determine the content of microelements was carried out according to generally accepted methods for determining chemical indicators: microelements of boron, molybdenum – by the photometric method; zinc, manganese, copper, cobalt – by the atomic absorption method. The alluvial soil of the research site is characterized by a high content of boron, copper, cobalt and an average content of manganese, zinc, molybdenum. According to the results of research in 2022-2024. The sediment load level on the site territory was established (11.9-15.8 t/ha). The input of microelements into the floodplain agricultural landscape varies in the range: boron 11.69-12.73 g/ha; molybdenum 1.07-1.54; zinc 109.49-203.49; manganese 640.22-1215.06; copper 174.93-200.66; cobalt 42.25-52.93 g/ha. Based on the obtained experimental data, the content of microelements in sediments and underlying alluvial soil was assessed, and empirical dependencies of the content of microelements in flood sediments on the level of sediment load were established. The information obtained during the research on the features of the influx of microelements with flood sediments onto reclaimed lands of the floodplain agricultural landscape is necessary when studying the migration flows of microelements in agroecosystems of floodplain reclaimed lands and will serve as a basis for developing highly effective adaptive measures aimed at maintaining fertility and increasing the productivity of alluvial soil of agricultural lands using complex agro- and biomelioration techniques of nature-like technologies.

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20. Patent for invention 2815978 Russian Federation, IPC G01N33/24 (2006.01); A01G 20/20 (2018.01). Method for monitoring the input of heavy metals and arsenic as part of the sediment load onto arable reclaimed lands of the flood­plain agricultural landscape, authors: Ilyinsky A.V., Evsen­kin K.N., Pavlov A.A., Golubenko M.I. Applicant and patent holder FSBSI VNIIGiM named after A.N. Kostyakov (RU). Application, No. 2023119944; declared 28.07.2023; published 25.03.2024, Bulletin, No. 9, 11 p.: ill.