The Impact of radioactive cesium-bearing microparticles on Cs transfer factor of brown rice on the paddy field in the first year of resumption of farming

辰野 宇大*; 二瓶 直登*; 吉村 和也  

Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya

This study investigated the changes in Cs and cesium-bearing microparticles (CsMPs) deposition in the paddy field in the first year of resumption of farming after the accident. Furthermore, we evaluate the contribution of CsMPs on particulate Cs to grasp the impact of CsMPs on transfer factor (TF) of brown rice. As a result, the accumulation of Cs and CsMPs increased in the entire field of this study in the period from plowing to harvest. The deposition of Cs per unit area increased in the center and the four corners of the paddy field other than inlet and outlet. This may be due to the deposition of suspended matter in areas with relatively little water movement. On the other hand, there was no clear trend for CsMPs deposition in the paddy filed. There was no significant difference between TF values with and without the contribution of CsMPs to Cs concentration in the soil.