Understanding of a factor that increases radiocesium concentration in stem wood of Japanese cedar: the effect of water uptake

Research Project

Project/Area Number	15H06847
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Forest science
Research Institution	Forestry and Forest Products Research Institute
Principal Investigator	OHASHI Shinta 国立研究開発法人森林総合研究所, 木材加工・特性研究領域, 研究員 (70754315)
Project Period (FY)	2015-08-28 – 2017-03-31
Project Status	Completed (Fiscal Year 2016)
Budget Amount *help	¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000) Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords	スギ / セシウム / 経根吸収 / 水耕実験 / 土耕実験 / 樹液流計測 / 材 / 水耕栽培 / 土耕栽培 / 吸水量 / 樹液流 / セシウム吸収量 / 樹液流量
Outline of Final Research Achievements	To understand what affects the amount of cesium uptake by roots in Japanese cedar, the effect of water uptake was investigated in this study. A hydroponic experiment on cedar saplings using cesium stable isotope as a tracer showed that there was a positive correlation between the amounts of water uptake and cesium uptake by roots. In addition, an experiment using a forest mineral soil contaminated with radiocesium from the Fukushima Dai-ichi Nuclear Power Plant accident indicated that the amount of water uptake would similarly affect cesium uptake in the actual forest condition.