Possibility of using technogenically polluted floodplain landscapes

A. L. Silaev; E. V. Smolsky; G. V. Chekin; V. Yu. Simonov; A. Novikov

doi:10.46925//rdluz.32.08

A. L. Silaev Bryansk State Agrarian University,
E. V. Smolsky Bryansk State Agrarian University
G. V. Chekin Bryansk State Agrarian University
V. Yu. Simonov Bryansk State Agrarian University
A. Novikov Bryansk State Agrarian University

DOI: https://doi.org/10.46925//rdluz.32.08

Keywords: radioactive contamination, floodplain meadow, alluvial soil, indicators of soil fertility, specific activity of 137Cs, correlation, soil pollution, feed, productivity, radioactivity, soil fertility

Abstract

The article provides a modern assessment of technogenically polluted floodplain landscapes of various rivers of the Polesian Lowland. The carried out ecological monitoring of productivity, radioactivity of perennial grasses and fertility of floodplain soils revealed the following results, tendencies and regularities: the most favorable set of conditions for obtaining an air-dry mass of grasses with the highest productivity up to 5 t / ha was found on the floodplain of the Iput River, possibly used as hayfields floodplain lands at present, with a ¹³⁷Cs pollution density below 555 kBq / m² obtained after the Chernobyl accident, the use of floodplains as hayfields with a ¹³⁷Cs pollution density above 555 kBq / m² is impossible, coarse fodder from the floodplains of the Iput and Besed rivers is 6.4 and 6.6 times higher than the permissible level of ¹³⁷Cs content in products, the content of organic matter, calcium and magnesium grew in the landscape of the floodplain by subsystems: near-river → central → near-terrace landscape, a high content of mobile phosphorus and exchangeable potassium, respectively, from 227 to 362 and 122 to 266 mg / kg were found in the near-terrace subsystem of the studied floodplains, the effect of fertility on an increase in productivity is positive, with the exception of the effect of acidity and negative on an increase in specific activity ¹³⁷Cs, established an average role (0.30 ˂ r ˂ 0.70) of fertility indicators in increasing productivity, the correlation coefficient (r) ranged from 0.41 to 0.64 and -0.38, revealed a strong role (r ˃ 0.70) of the content of phosphorus available for a plant in a decrease in the specific activity of ¹³⁷Cs in the air-dry mass of grasses, the correlation coefficient (r) was –0.70.

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Author Biographies

A. L. Silaev, Bryansk State Agrarian University,

Candidate of Agricultural Sciences, Associate Professor, Head of the Department of Agrochemistry, Soil Science and Ecology, Bryansk State Agrarian University, 2A, Sovetskaya street.

E. V. Smolsky, Bryansk State Agrarian University

Candidate of Agricultural Sciences, Associate Professor of the Department of Agrochemistry, Soil Science and Ecology, Bryansk State Agrarian University, 2A, Sovetskaya street.

G. V. Chekin, Bryansk State Agrarian University

Candidate of Agricultural Sciences, Associate Professor, Department of Agrochemistry, Soil Science and Ecology, Bryansk State Agrarian University, 2A, Sovetskaya street.

V. Yu. Simonov, Bryansk State Agrarian University

Candidate of Agricultural Sciences, Associate Professor of the Department of Agronomy, Breeding and Seed Production, Bryansk State Agrarian University, 2A, Sovetskaya street.

A. Novikov, Bryansk State Agrarian University

Student Bryansk State Agrarian University, 2A, Sovetskaya street, village of Kokkino, Vygonichsky district, Bryansk region, Russia,243365

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