Research field (3)：
Landscape science
, Environmental agriculture
, Plant nutrition, soil science
Research keywords (3)：
物質循環
, 温室効果ガス
, 泥炭地
Research theme for competitive and other funds (5)：
2020 - 2024 Effect of non-structural carbon in rice straw on methane emission from rice paddy fields
2013 - 2017 Quantitative evaluation of dynamics of nitrogen derived from organic materials applied to the paddy-upland rotation system by the 15N tracer method
2012 - 2016 Present conditions of land conversion between paddy and upland for farming reform in Tohoku region of Japan
2008 - 窒素肥沃度の異なる転換ダイズ畑における窒素収支の評価
湿地・泥炭地生態系の温室効果ガス収支に攪乱が与える影響
Papers (67)：
Akane Kagemoto, Fumiaki Takakai, Osamu Nagata, Masayuki Takada, Ryusuke Hatano. Spatial Evaluation of Greenhouse Gas Fluxes in a Sasa (Dwarf Bamboo) Invaded Wetland Ecosystem in Central Hokkaido, Japan. ATMOSPHERE. 2021. 12. 4
Luc Duc Phung, Masaaki Miyazawa, Dung Viet Pham, Masateru Nishiyama, Shuhei Masuda, Fumiaki Takakai, Toru Watanabe. Methane Mitigation is Associated with Reduced Abundance of Methanogenic and Methanotrophic Communities in Paddy Soils Continuously Sub-irrigated with Treated Wastewater. 2021
Shohei Otomo, Akihiko Terada, Yu-You Li, Kazuya Nishitoba, Fumiaki Takakai, Kunihiro Okano, Naoyuki Miyata, Shuhei Masuda. Long-term Assessment of N2O Emission Factor in Full-scale Oxidation Ditch Reactor Considering Spatiotemporal Distribution. Journal of Water and Environment Technology. 2021. 19. 3. 139-152
Dong Duy Pham, Agnes Hoki Briliana Suhono, Nobuo Kaku, Shuhei Masuda, Fumiaki Takakai, Toru Watanabe. Methane and nitrous oxide emissions from paddy fields with no fertilizer use under continuous irrigation with treated municipal wastewater. Environmental Science and Pollution Research. 2021
Luc Duc Phung, Dung Viet Pham, Yuka Sasaki, Shuhei Masuda, Fumiaki Takakai, Nobuo Kaku, Toru Watanabe. Continuous Sub-Irrigation with Treated Municipal Wastewater for Protein-Rich Rice Production with Reduced Emissions of CH4 and N2O. Scientific Reports. 2020. 10. 1
Use of remote sensing for estimating global warming potential at permafrost area in East-Siberia (Kimura S. D., Takao G., Kushida K., Takakai F., Koide T. and Hatano R.). In: Symptom of Environmental Change in Siberian Permafrost Region (Eds. Hatano R ・・・
Hokkaido University Press, Sapporo. 2006 ISBN:483290342X
Salt and water movement in a Forest-Alas ecosystem in Central Yakutia, Eastern Siberia (Lopez L., Brouchkov A., Nakayama H., Takakai F., Fedorov A. N. and Fukuda M.). In: Symptom of Environmental Change in Siberian Permafrost Region (Eds. Hatano R and ・・・
Hokkaido University Press, Sapporo. 2006 ISBN:483290342X
Surface water chemistry in a continuous permafrost region, Central Yakutia, Eastern Siberia (Nakahara O., Takakai F., Desyatkin A. R., Hatano R. and Desyatkin R. V.). In: Symptom of Environmental Change in Siberian Permafrost Region (Eds. Hatano R and ・・・
Hokkaido University Press, Sapporo. 2006 ISBN:483290342X
Dissolved N2O and CH4 in seepage and stream water in Yakutsk (Sawamoto T., Takakai F., Desyatkin A. R., Desyatkin R. V. and Hatano R.). In: Symptom of Environmental Change in Siberian Permafrost Region (Eds. Hatano R and Guggenberger G), pp. 123-128.
Hokkaido University Press, Sapporo. 2006 ISBN:483290342X
Contribution of forest fire and land covers to emissions of CO2, CH4 and N2O in Central Yakutia (Hatano R., Takakai F., Morishita T., Takao G. and Desyatkin R. V.). In: Symptom of Environmental Change in Siberian Permafrost Region (Eds. Hatano R and Gu・・・
Hokkaido University Press, Sapporo. 2006 ISBN:483290342X
2020/10 - 現在 Faculty of Bioresource Sciences, Akita Prefectural University Laboratory of Soil Science, Department of Biological Environment Associate Professor
2008/04 - 2020/09 Akita Prefectural University Faculty of Bioresource Sciences, Department of Biological Environment
2007/04 - 2008/03 Hokkaido University Graduate School of Agriculture Research Faculty of Agriculture
2006 - PYRN [Permafrost Young Researchers Network] award for outstanding presentation (Asian Conference on Permafrost, Lanzhou, China, August 7-9, 2006, http://www.awi-potsdam.de/pyrn/pyrn_award.htm)
