*Munemasa Teramoto¹, Naishen Liang¹, Jiye Zeng¹, Jun Koarashi², Toshiaki Kondo³, Mariko Atarashi-Andoh², Takafumi Aramaki¹, Xin Zhao ¹ (1.National Institute for Environmental Studies, 2.Japan Atomic Energy Agency, 3.Japan International Research Center for Agricultural Sciences)