Archives → 2020 → V. 60. № 1. → pp. 82-88
Article
Features of 90Sr Accumulation and Distribution in the Root System of Pinus Sylvestris in the Remote Period after the Chernobyl Fallout
O. B. Tsvetnova, A. I. Shcheglov and S. R. Besaeva
M.V. Lomonosov Moscow State University, Moscow, Russia
Abstract
The article deals with the features of 90Sr accumulation and distribution in the roots of Pinus sylvestris (L.) under the conditions of radioactively contaminated pine forests of Bryansk Polesie. It was found that the specific activity of 90Sr in pine roots varies depending on their diameter and depth of distribution: the maximum value is observed in fractions <3 mm, the minimum – > 20 mm; the specific activity of 90Sr in the corresponding fractions of roots is significantly reduced with the depth. It is shown that radionuclide transfer by root systems of plants is most significant for 90Sr compared to 137Cs, the contribution of roots to the total contamination of 90Sr 0–30 cm soil layer of pine forest is 3 times higher than 137Cs (3 and 1%, respectively). It is determined that the relative distribution of the total amount of 90Sr in the roots in the forest ecosystems of Bryansk Polesie is currently not similar to the distribution of the total accumulation of its chemical analogue – calcium.
Keywords
roots, Scots pine, 90Sr, specific activity, Ca, the total amount, the contribution, Bryansk Polesie
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