持続的稲作を目指した放射能汚染土壌におけるイネからのエタノール生産

抄録

Radioactive species such as ¹³⁷Cs were discharged from Fukushima Daiichi Nuclear Power Plant which was severely damaged by the enormous earthquake and tsunami. Cropland has been radioactively contaminated by ¹³⁷Cs etc. and it seems impossible to plant rice due to the non-suitability for food. According to the reports, ¹³⁷Cs transferred into the rice from soil is less than 1% on the average. Therefore, it is expected that the concentration of ¹³⁷Cs in bioethanol will be well below the tentative restriction value even if bioethanol could be produced from the rice. It is proposed that the rice field should be filled with water to avoid the flow of runoff contaminated by radioactive cesium compounds because they are insoluble in aqueous phase and that bioethanol should be produced from the rice in order to maintain the multifunction of rice field and to continue the agriculture. If rice farming is halted and neglected, agricultural function of rice field as well as local community will be permanently destroyed.