Section

Physical geography and biogeography, soil geography and landscape geochemistry

Title

MIGRATION POOL OF NITRATE NYTROGEN IN VERTICAL PROFILE OF THE UPPER VOLGA REGION SOIL

Сontributors

I. M. Shchukin, Junior Research Fellow at the Department of Soil Agrophysics, This email address is being protected from spambots. You need JavaScript enabled to view it.,

S.I. Zinchenko, Ph. D. (Agriculture), Dr. Habil., Deputy Director of Research, Vladimir Agricultural Research Institute, zinchenkosergei@. mail.ru

Abstract

Nitrogen migration in soil cross section based on the level of anthropogenic impact has been investigated in the Upper Volga agricultural ecosystems with sod-podzolic and gray forest soils. The stationary field experiment with gray forest soil has revealed that increasing antropogenic impact from the zero level of intensive technology to the high organic and mineral level brings about a decrease in N—NO3 migration activity in lower layers to the level of biocenosis. The concentration of N—NO3 in the layer of 20—300 cm decreases in the following way: zero background-intensive — highly intensive mineral — highly intensive organic and mineral. In comparison with the ecosystem, the N—NO3 content in agricultural ecosystems was higher by a factor of 4.5, 2.1 and 1.6 respectively. The nitrate content in an agricultural ecosystem with highly intensive organic and mineral anthropogenic load corresponds to that of the ecosystem. Comparable results were observed in the experiments on sod-podzolic soil. The use of moldboardplowing on sod-podzolic soil increases the migration of nitrate down the profile as compared to the moldboardless plowing. The mineral-nitrogen migration pool in the soil profile of the Upper Volga Region reflects the specific nature of its operation, which is determined by the level of anthropogenic impact on agricultural ecosystems.

Keywords

agricultural ecosystem, ecosystem, nitrate migration, gray forest soil, sod-podzolic soil, levels of technology intensification, mineral fertilizers, organic fertilizers, anthropogenic load.

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