Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 70(1): 19-27 (2021)


カキにおけるフォールアウト由来の137Csと天然由来の133Csの果実への移行の相違Differences in Fallout-Derived 137Cs and Naturally-Derived 133Cs Transfer to Fruit in Persimmon Tree

1国立研究開発法人農業・食品産業技術総合研究機構果樹茶業研究部門Institute of Fruit Tree and Tea Science, NARO

2 福島県農林水産部Agriculture, Forestry and Fishery Department, Fukushima Prefecture

3国立研究開発法人農業・食品産業技術総合研究機構食品研究部門Food Research Institute, NARO

受付日:2020年7月10日Received: July 10, 2020
受理日:2020年9月24日Accepted: September 24, 2020
発行日:2021年1月15日Published: January 15, 2021


To confirm the contamination by radiocaesium, the concentrations of 137Cs and 133Cs of Japanese persimmon fruits and soils were measured in several orchards. Over 3 years, the 137Cs concentration tended to decrease in many orchards, and there was no significant difference in the transfer factor. Additionally, 5 to 7 years after the accident, the effect of above-ground contamination seemed to be decreasing, and radiocaesium contamination by roots was likely negligible. The 133Cs concentration in the soil was similar in all orchards; however, the 133Cs concentration of fruits in one orchard was higher than that in the other orchards.

Key words: caesium-133; caesium-137; Japanese persimmon; Fukushima Dai-ichi Nuclear Power Plant Accident

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