Contribution of stubble to the root uptake of radiocesium by rice plants

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K07344
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plant nutrition/Soil science
• Research Institution: National Institutes for Quantum and Radiological Science and Technology
• Principal Investigator: Ishii Nobuyoshi 国立研究開発法人量子科学技術研究開発機構, 放射線医学総合研究所 福島再生支援本部, 主幹研究員(定常) (50392212)
• Co-Investigator(Kenkyū-buntansha): 田上 恵子 国立研究開発法人量子科学技術研究開発機構, 放射線医学総合研究所 福島再生支援本部, チームリーダー (10236375)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 放射性セシウム / 刈り株 / 経根吸収 / 水稲 / 原子力発電所事故

Outline of Final Research Achievements

Transfer of Cs-137 from rice stubbles to rice plants was studied to elucidate the behavior of radiocesium in rice paddy fields. Rice stubbles were dried, powdered and then incorporated into paddy soil samples. The activity concentration of Cs-137 in the stubble was 383 Bq/kg-dry. Rice plants were harvested after 139 days of rice transplanting. Contaminations of Cs-137 in the harvested brown rice samples were under detection limit of 1.0 Bq/kg-dry. Results of this study suggested that the potential contribution of rice stubble to the transfer of radiocesium to rice plants is small.

Free Research Field

放射生態学