IODINE DEFICIENCY IN AGRICULTURAL LANDSCAPES OF THE BRYANSK REGION

Abstract

Bryansk region is one of the regions of Russia which is characterized by a deficiency of a number of elements in soils and biogeochemical food chain, including iodine. Environmental contamination of the areas with natural iodine deficit by radioiodine isotopes can cause additional risk of negative biological reaction of the thyroid gland. The study shows the results of the analysis ofthe iodine content in 156 potato samples and 208 soil samples of agricultural landscapes, from 113 settlements of the Bryansk region. There are first results of the influence of natural iodine deficiency in agricultural soils and potatoes on the risk of adverse biological reactions of the thyroid gland. One of the results is different contents of iodine in potatoes and soils of landscapes of the three classes of water migration due to differences in the type of parent rocks and by class of water migration of chemical elements in soils. It is confirmed, that in typical landscapes of the H+-Ca2+ class there are highest content of iodine in soil, water and potatoes.

Keywords

• bryansk region
• iodine deficiency
• thyroid
• agrolandscape
• potatoes
• soil