Radioactive Cs transfer to vegetables after the FDNPP accident

To evaluate the effectiveness of potassium (K) application in mitigating137Cs transfer from soil to plants, several vegetable species were cultivated under field and pot experiments. In experiment, squash, sweet potato, turnip, carrot examined 2020 2021 two different areas Hamadori (coastal region Fukushima Prefecture). Transfer factor (TF) was calculated by dividing harvest radioactivity (Bq kg−1 dry or fresh) dry) negatively correlated with amount exchangeable K (ExK) at harvest, regardless species, year, location. edamame (immature soybean seed), spinach, komatsuna cultivated, it confirmed that ExK most powerful regulating TF. Based on relationship between TF for each required keep 137Cs concentration lower than a certain level (standard limitation value one-quarter value) calculated.