Percevyi I. Estimation of biogenic migration of 137Cs and 90Sr in the agrarian landscapes of the Bila Tserkva region Kyiv district, which was radioactive contaminated as a result of the Chernobyl accident.

In dissertation was conducted the complex estimation of biogenic migration of radionuclides of 137Cs and 90Sr in the trophyc chain soil - plant - animal on the agrarian landscapes of the radioactive contaminated and conventional clean territories of the Bila Tserkva region Kyiv district in the conditions of forest-steppe area. Is studied the contents of 137Cs and 90Sr in soils of agricultural lands, plant-growers products, cow's milk, beef, cattle's dung mass. Is conducted the estimation of the radioecological state of soils for the content of 137Cs and 90Sr, their accumulation in grain, vegetative mass of grain-crops, green mass of green crops, cow's milk, beef, cattle's dung mass. The coefficients of transition of 137Cs and 90Sr in the products of plant-grower, milk, beef, dung mass are calculated. It was the role of the cattle's dung mass in migration the 137Cs and 90Sr on radioactive contaminated agrarian landscapes and its influence on the level of contamination the soils found out. In the cowsdung mass passes about 90 % 137Cs and 90Sr, that set in with the forage of average daily ration. The cattle's dung mass, was got on radioactive contamination area, caused the migration and redistribution of 137Cs and 90Sr on the agrarian landscapes and is the source of the second contamination of soil. Use the dung mass, got on the radioactive contamination area will not bring a substantial increase over of level of contamination of soils of 137Cs and 90Sr, but on the conventional clean territories will considerably increase their content in soils.