Research and development of effective radioactive decontamination using plant-microbe interactions from Fukushima farmland under radioactive Cs circulation.

2014 Fiscal Year Final Research Report

• Project/Area Number: 24380176
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Boundary agriculture
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: YOKOYAMA Tadashi 東京農工大学, (連合)農学研究科(研究院), 教授 (70313286)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Souzho 東京農工大学, 大学院農学研究院, 教授 (30137898) ; WATANABE Izumi 東京農工大学, 大学院農学研究院, 准教授 (30302912) ; KIMURA SonokoDrothea 東京農工大学, 大学院農学研究院, 准教授 (60397015)
• Co-Investigator(Renkei-kenkyūsha): OHTSU Naoko 東京農工大学, 大学院農学研究院, 講師 (40513437)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 放射性Cs / 除染 / 植物－微生物相互作用 / バイオ肥料 / カリウム溶解菌 / 野生動物 / 世代汚染

Outline of Final Research Achievements

In order to clarify actual states of environmental contamination by radioactive Cs and to evaluate a novel method of radioactive decontamination in farm lands using plant-microbe interactions, we carried out several field surveys at Nihonmatsu city in Fukushima prefecture. Major clay mineral distributing in Nihonmatsu was Vermiculite and we found organic acid induces to release Cs from the clay by X-ray diffraction. Regarding paddy ecosystem, tadpoles had higher 137Cs activity concentration. In several tributaries of Abukuma River, 137Cs activity concentrations of sediments had a seasonal change pattern. Furthermore, wild ducks had concentrated 137Cs into their testes and ovaries. Several varieties of Brassica species with PGPR showed increase of radioactive Cs uptake. Though Brassica species could not uptake 137Cs fixed into clay minerals, Brassica species applied with K-solubilizing bacteria producing organic acids promoted those uptake.

Free Research Field

土壌肥料学