Establishment of decontamination technology of radiocesium contaminated agricultural land using napiergrass (Pennisetum purpureum Schum.)

2015 Fiscal Year Final Research Report

• Project/Area Number: 25450495
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental agriculture(including landscape science)
• Research Institution: Hirosaki University
• Principal Investigator: Kang Dong-Jin 弘前大学, 農学生命科学部, 准教授 (20409080)
• Co-Investigator(Kenkyū-buntansha): ISHII Yasuyuki 宮崎大学, 農学部, 教授 (50211032)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ファイトレメディエーション / ネピアグラス / 乾物収量 / 吸収濃度 / 放射性セシウム / カリウム肥料 / 除染率

Outline of Final Research Achievements

This study examines on the remediation of radiocesium-137 (137Cs) using napiergrass (Pennisetum purpureum Schum.) in highly Cs-contaminated soils in the town of Namie, Fukushima Prefecture. We elucidate that higher humus content was closely related to a higher biomass and Cs removal ratio (CR), and the highest CR could be achieved through a high aboveground biomass under high planting density with biannual cutting and applied a low level K fertilizer, especially 20% K. Therefore, to increase biomass and CR, it is necessary to apply a low level K fertilizer, even though it would somewhat compete with 137Cs uptake from the soil to the plant.

Free Research Field

環境農学