Nitrogen regime of peat-gley soil and its influence on accumulation 137Cs in plants and the productivity of perennial cereal grasses

Abstract

A significant relationship (r = 0,50-0,66) was established between the content of N_min in the soil in the early spring period and after the first mowing and the activity of ¹³⁷Cs in the hay of perennial grasses of the first and second mowing. With an increase in the content of mineral nitrogen compounds in the soil, an increase in the specific activity of radionuclide in plants is observed. Strong correlations were found between the content of mineral nitrogen in the soil in the early spring period and after the first mowing of grasses and the hay yield of the first and second mowing. The correlation coefficients (r) were 0,83 and 0,73, respectively. With an increase of N_min reserves in the soil, a significant increase in productivity was observed.