137Cs migration activity in the link “soil - plant” in the Krasnoyarsk region central areas agrarian landscape

The purpose of the study is to assess the intensity of 137Cs migration in the “soil-plant” link in the central areas of the Krasnoyarsk Region in agricultural landscapes with additional radiation load; to establish the accumulation coefficient of 137Cs for soils of agricultural landscapes of the forest-steppe zone of the Krasnoyarsk Region; to assess the correlation between the content of 137Cs in soils and feeds, describe the identified dependence using linear regression equations. An extensive literature review is provided on the characteristics of the migration activity of 137Cs from various types of soils into plants in agrobiocenoses contaminated as a result of radiation accidents. The author, based on a radioecological survey of the territory of the central areas of the region, identified agricultural landscapes with anthropogenic pollution. Data on the specific activity of 137Cs in soils and feed produced in agricultural landscapes with additional technogenic load are presented. The ambient dose equivalent rate (ADR) in the tested agricultural landscapes corresponds to the value characteristic of the territory of the Krasnoyarsk Region. The specific activity of 137Cs in soils of agricultural landscapes with doses of 1.33 and 1.55 mGy/year exceeds the average for the Krasnoyarsk Region. The specific activity of 137Cs in feed of agricultural landscapes with absorbed doses of 1.33 and 1.55 mGy/year does not exceed the values of control levels; accordingly, radiation-safe feed is produced in the Krasnoyarsk Region. The accumulation coefficient of 137Cs for the “soil-plant” link for agricultural landscapes with absorbed doses of 1.33 and 1.55 mGy/year is 0.02, which indicates the availability of only 2 % of soil 137Cs during its migration into plants. In the tested agricultural landscapes, a linear correlation was determined between the specific activity of 137Cs in soils and feeds. A linear dependence of the 137Cs content in forb hay on the 137Cs concentration in soils was revealed; on this basis, linear regression equations were derived that make it possible to determine the radiation safety of feed based on 137Cs at a certain 137Cs concentration in soils.