Hirai Keizo

ヒライケイゾウ | Hirai Keizo

Affiliation and department：
Job title： Principal Research Director (Climate Change)
Homepage URL (2)： https://www.ffpri.affrc.go.jp/organization/director.html , https://www.ffpri.affrc.go.jp/en/organization/index.html#Principal%20Research%20Coordinator

Research field (1)： Forest science

Research keywords (10)：分解 , 栄養 , 無機化 , 熱帯 , 窒素循環 , 森林土壌学 , 養分供給 , Effect of silvicultural practice , Nitrogen cycling , Forest soil

Research theme for competitive and other funds (35)：

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Papers (87)：

Ayumi Kawanishi, Yoshimi Sakai, Shigehiro Ishizuka, Shoji Hashimoto, Masabumi Komatsu, Akihiro Imaya, Naoyuki Yamashita, Keizo Hirai, Hitomi Furusawa, Shuhei Aizawa. Increased deadwood carbon stocks through planted forestry practices: insights from a Forest Inventory Survey in Japan. Carbon Management. 2024. 15. 1. 2315087
Hiroki Itô, Satoru Miura, Masabumi Komatsu, Tsutomu Kanasashi, Junko Nagakura, Keizo Hirai. Variability in radiocesium activity concentration in growing hardwood shoots in Fukushima, Japan. PLoS ONE. 2023. 18. 2
Dokrak Marod, Tohru Nakashizuka, Tomoyuki Saitoh, Keizo Hirai, Sathid Thinkampheang, Lamthai Asanok, Wongsatorn Phumphuang, Noppakun Danrad, Sura Pattanakiat. Long Term Seasonal Variability on Litterfall in Tropical Dry Forests, Western Thailand. Forests. 2023. 14. 10. 2107-2107
Takuya Manaka, Masabumi Komatsu, Wataru Sakashita, Naohiro Imamura, Shoji Hashimoto, Keizo Hirai, Satoru Miura, Shinji Kaneko, Tadashi Sakata, Yoshiki Shinomiya. Ten-year trends in vertical distribution of radiocesium in Fukushima forest soils, Japan. Journal of Environmental Radioactivity. 2022. 251-252. 106967-106967
Nobuhiko Shigyo, Hitomi Furusawa, Naoyuki Yamashita, Junko Nagakura, Takuya Manaka, Tsuyoshi Yamada, Keizo Hirai. Slope-induced factors shape bacterial communities in surface soils in a forested headwater catchment. CATENA. 2022. 214. 106253-106253

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MISC (81)：

執行宣彦, 古澤仁美, 阪田匡司, 阪田匡司, 細川奈々枝, 平井敬三. 落葉の樹種による違いが鉱質土壌の硝化微生物群集に及ぼす影響. 日本森林学会大会学術講演集. 2022. 133rd
Hashimoto Shoji, Katata Genki, Ohashi Shinta, Manaka Takuya, Iwagami Sho, Komatsu Masabumi, Tamaoki Masanori, Ohkubo Tatsuhiro, Shinomiya Yoshiki, Watanabe Hitoshi, et al. Symposium on “The dynamics of radiocesium in forests: researchers provide easy-to-understand lectures”. Japanese Journal of Forest Environment. 2021. 63. 1. 13-16
山下尚之, 石塚成宏, 橋本昌司, 大曽根陽子, 川西あゆみ, 相澤州平, 今矢明宏, 平井敬三, 森貞和仁, 田中永晴, et al. AIを活用して高精細な森林土壌炭素貯留量の日本地図を作成. 森林総合研究所中長期計画成果集. 2021
平井敬三, 小松雅史, 長倉淳子. ヒノキ植栽木の放射性セシウム吸収に対するカリウム施肥と施肥中止の影響. 日本森林学会大会学術講演集. 2021. 132nd
平井敬三, 小松雅史, 長倉淳子. 施肥中断による植栽木の放射性セシウム濃度と土壌の交換性塩基の変化. 日本森林学会大会学術講演集. 2020. 131st

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Books (5)：

Carbon Cycling in Teak Plantations in Comparison with Seasonally Dry Tropical Forests in Thailand, In Forest Ecosystems
Inetch 2012 ISBN:9789535102021
Effects of Thinning on Material Transformation in Cryptomeria Japonica Stand in a Watershed in Eastern Japan, In Watersheds: Processes, Management and Impact
Nova Science Publishers 2012 ISBN:9781620810576
窒素飽和と富栄養化(森林大百科事典、森林総合研究所編)81-83
朝倉書店 2009
満腹の森(森林の環境100不思議、日本林業技術協会編),38-39
東京書籍 1999 ISBN:4487794234
土壌の分析法(森林立地調査法-森の環境を測る-、森林立地調査法編集委員会編)
博友社 1999 ISBN:4826801785

Education (2)：

Professional career (1)：

Work history (13)：

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Committee career (8)：

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Awards (3)：

Association Membership(s) (8)：

土壌微生物学会 , 日本森林学会 , 日本土壌肥料学会 , 日本生態学会 , 日本ベドロジー学会 , 森林立地学会 , 国際林業研究機関連合 , 国際土壌学会

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