Ingestion of edible wild mushrooms collected in areas contaminated with radiocesium released from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident may pose a risk of internal dose to their consumers. A species-specific aggregated transfer factor (T_ag), which is calculated using radiocesium concentration in a wild mushroom species (Bq kg⁻¹ wet mass [WM]) divided by the total concentration in the soil surface area (Bq m⁻²), would be a useful tool to estimate the dose from wild mushrooms by ingestion. In this study, we especially focused on the T_ag data collected in 2016–2020 to use these values for a long-term dose assessment. We assumed that ¹³⁷Cs concentrations after that year were almost the same, thus the soil-mushroom system would be in an apparent steady-state condition. In all, we could obtain T_ag values of ¹³⁷Cs in 62 edible wild mushroom species native to Japan. The geometric mean (GM) values were 1.5 × 10⁻³ m² kg⁻¹ WM using GMs of 13 saprobic type species and 5.0 × 10⁻³ m² kg⁻¹ WM using GMs of 21 mycorrhizal type species (N > 2). On average, the GMs of species-specific T_ag values were 1.9 ± 0.9 times higher than those reported in a previous study of wild mushrooms made after the FDNPP accident, probably due to the different approaches for T_ag calculation.

食用福岛第一核电站 (FDNPP) 事故释放的放射性铯污染地区收集的食用野生蘑菇可能会对消费者造成内剂量风险。特定物种的总转移因子 (T _ag )，其计算方法是使用野生蘑菇物种中的放射性铯浓度 (Bq kg ^-1湿重 [WM]) 除以土壤表面积的总浓度 (Bq m ^-2 ) ，将是一种有用的工具，可以通过摄入来估计野生蘑菇的剂量。在这项研究中，我们特别关注在T _AG收集在2016 - 2020年使用这些值的长期剂量评估数据。我们假设¹³⁷那年之后的Cs浓度几乎相同，因此土壤-蘑菇系统将处于明显的稳态条件。总之，我们可以在 62 种原产于日本的可食用野生蘑菇中获得¹³⁷ Cs 的_Tag值。几何平均值 (GM) 值为 1.5 × 10 ^-3  m ²  kg ^-1 WM，使用 13 种腐生型物种的 GMs，5.0 × 10 ^-3  m ²  kg ^-1 WM 使用 21 种菌根型物种的 GMs (N > 2) . 平均而言，物种特异性T大湄公河次区域_股份公司值比在FDNPP事故发生后提出，可能是由于T的不同方法野生蘑菇先前的研究报告高出1.9±0.9倍_AG计算。