Radioactivity Distribution of the Fruit Trees Ascribable to Radioactive Fall Out(II):Transfer of Radiocaesium from Soil in 2011 when Fukushima Daiichi Nuclear Power Plant Accident Happened

Abstract

Comparing the peach trees planted in the containers covered the surface of soil when radioactive nuclides fell out with those non‐covered the surface, we could examine the shift of radiocaesium derived from soil to peach trees. The concentration of radiocaesium in the soil covered the surface was one sixth of that in the non‐covered soil. Regardless of the absence of cover, concentration of radiocaesium in roots was below the detection limit value. Though the content of radiocaesium in the ground part of peach trees was much more than that in the underground part, the difference in that of the ground part by the absence of cover was not observed. Therefore, it was suggested that the effect of radiocaesium in soil to the concentration of that in the ground part of peach trees would be negligible in an accident year.