INTENSITY OF 137CS TRANSITION INTO NECTAR-POLLINATING PLANTS AND BEEKEEPING PRODUCTS DURING RECLAMATION OF RADIOACTIVELY CONTAMINATED SOILS

Abstract

The article presents investigations of transition 137Cs to agricultural crops (sunflower) and beekeeping products (honey, bee pollen) for reclamation of radioactively contaminated soils. It is proved that the quality of beekeeping products depends from the ecological condition of nectar-pollinating lands. As a result of the 1986 accident at the Chernobyl nuclear power plant, nectar-pollinating lands were subjected to high man-caused impact, in particular, some areas of Polissya. It caused a certain accumulation of 137Cs and 90Sr in beekeeping products. The authors studied the effect of reclamation of contaminated soils, in particular, in the Narodytskyi district of Zhytomyr region of Ukraine with 137Cs up to 5 Ci/m2 with different acidity on the intensity of accumulation of this radionuclide in honey and bee pollen produced by bees from nectar and sunflower pollen. It was found that the specific activity of 137Cs in honey and bee pollen produced by bees from nectar and pollen of sunflower grown on agricultural land with a content of this radionuclide in soils from 2824 Bq/kg to 2665 Bq/kg, not exceeding DR-2006 200 Bq/kg. Reclamation of radioactively contaminated soils with hydrolytic acidity from 1.6 mg to 2.4 mg-eq/100 g of soil, in particular, the application of defication mud in them at a rate of 4 t/ha to 6 t/ha reduced the specific activity and accumulation coefficient of 137Cs in vegetative mass of sunflower, honey and bee pollen, made by bees from nectar and pollen of this plant.