Seasonal change of radioactive contamination in edible wild plants and a method to reduce the internal exposure risk of radiocesium when collecting edible wild plants

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K07496
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Forest Research and Management Organization
• Principal Investigator: Kiyono Yoshiyuki 国立研究開発法人森林研究・整備機構, 森林総合研究所, 再雇用研究専門員 (10353666)
• Co-Investigator(Kenkyū-buntansha): 赤間 亮夫 国立研究開発法人森林研究・整備機構, 森林総合研究所, 再雇用研究専門員 (40353552)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 山菜 / 放射能 / 内部被ばく / 原発事故 / 季節変化 / 経年変化

Outline of Final Research Achievements

Seasonal changes in radiocesium concentration were measured for edible parts of Petasites japonicus and Eleutherococcus sciadophylloides. The relationship between the amount of radiocesium deposition in the environment and the radiocesium concentration in edible parts of edible wild plants was approximated by a power equation. Using this relationship, models were developed to predict the radiocesium concentration of edible wild plants, and determined the values of the parameters for 13 species. Then we verified the model using the values of other 280 edible wild plant species. Based on these results, we made a method to reduce the internal exposure risk of radiocesium when collecting edible wild plants, considering the seasonal change.

Free Research Field

森林生態学