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

2016 Fiscal Year Final Research Report

• 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
• Keywords: スギ / セシウム / 経根吸収 / 水耕実験 / 土耕実験 / 樹液流計測

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.

Free Research Field

森林セシウム動態