Radioactivity Distribution of the Fruit Trees Ascribable to Radioactive Fall Out(VI)—Effect of Heterogeneity of Caesium-137 Concentration in Soil on Transferability to Grape Trees and Fig Trees—

Abstract

We examined the effects of the heterogeneity of ¹³⁷Cs concentration in soil on transferability to shallow rooted fig and non-shallow rooted grapes. Three-year-old trees were planted into the pots filled with soil changed to the concentration of radioactivity Cs in surface (0 - 5cm) and deep soil (5 - 15cm). Transfer rate of radioactive ¹³⁷Cs to plants from the soil was higher in fig than in grapes when grown under the same conditions. In fig trees, transfer rate of radioactive ¹³⁷Cs to plants from the soil was higher the plants cultivated under high concentration of ¹³⁷Cs in surface soil than in deep soil.