Evaluation of technogenic pollution of soils and grass fodder from meadow ecosystems in Dobrush district

The paper considers the agrochemical and radiological evaluation of soil of four floodplain meadow ecosystems of the Iput river in Dobrush district as well as the accumulation of heavy metals, cesium-137 and strontium-90 by grass fodder. Methods: floral, geobotanical, agrochemical, zootechnical, radiological. The studied soils are strongly acidic and acidic, have low content of mobile phosphorus and potassium as well as organic matter. Soils with Caricetum gracilis and Poo-Festucetum pratensis plant associations revealed the highest specific activity of cesium-137. The maximum specific activity of strontium-90 was revealed in the fourth object, i. e. Caricetum gracilis association. Calamagrostietum epigeii association is characterized by having the highest iron content while the accumulation of copper, zinc, cobalt, manganese, lead, cadmium and chromium were much lower than the threshold limits. Caricetum gracilis was the only association with exceeding the threshold limits by nickel. Analysis of the specific activity for cesium-137 revealed the herbal fodder from Caricetum gracilis and Poo-Festucetum pratensis associations exceeded the threshold limit of 1300 Bq/kg, and therefore can not be used for whole milk production. The specific activity of grass fodder for strontium-90 did not exceed the permissible level of 260 Bq/kg in all the associations, and this fodder can be freely used for feeding livestock.