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Nagano, Hirohiko*; Kanda, Yuki*; Suzuki, Yuri*; Hiradate, Shuntaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Guo, Z.*
Discover Soil (Internet), 2, p.27_1 - 27_9, 2025/04
Alam, M. M.*; Yamakita, Eri*; Inoue, Yuzuru*; Koarashi, Jun; Atarashi-Andoh, Mariko; Abe, Yukiko; Nakayama, Hiromasa; Mori, Yuki*; Hiradate, Shuntaro*
Soil Science and Plant Nutrition, 12 Pages, 2025/03
release by drying-rewetting cycles among Japanese forests and pastureland soils and exploring predictors of increasing magnitudeSuzuki, Yuri*; Hiradate, Shuntaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Yomogida, Takumi; Kanda, Yuki*; Nagano, Hirohiko*
Soil (Internet), 11(1), p.35 - 49, 2025/01
Times Cited Count：0 Percentile：0.00(Soil Science)Sato, Yuhi*; Ishizuka, Shigehiro*; Hiradate, Shuntaro*; Atarashi-Andoh, Mariko; Nagano, Hirohiko*; Koarashi, Jun
Environmental Research, 239, Part 1, p.117224_1 - 117224_9, 2023/12
Times Cited Count：5 Percentile：70.89(Environmental Sciences)The stability of soil organic matter (SOM) is important for improving our understanding of the global carbon cycle and ongoing climate change. This study examined the applicability of loss-on-ignition of soil with a stepwise increase in temperature (SIT-LOI) to evaluate the stability of the SOM using soil samples from Japan having different organic matter (OM) and mineral contents and different mean residence times (MRTs), estimated from radiocarbon analysis, for SOM. As the result of this examination, SIT-LOI data was strongly correlated with MRTs. This clearly suggests that SIT-LOI can be an indicator evaluating the stability of SOM in actual environments.
Wijesinghe, J. N.*; Koarashi, Jun; Atarashi-Andoh, Mariko; Kokubu, Yoko; Yamaguchi, Noriko*; Sase, Takashi*; Hosono, Mamoru*; Inoue, Yuzuru*; Mori, Yuki*; Hiradate, Shuntaro*
Geoderma, 374, p.114417_1 - 114417_10, 2020/09
Times Cited Count：12 Percentile：41.72(Soil Science)Suzuki, Yuri*; Nagano, Hirohiko*; Hiradate, Shuntaro*; Atarashi-Andoh, Mariko; Abe, Yukiko; Nakayama, Masataka; Koarashi, Jun
no journal, ,
no abstracts in English
Koarashi, Jun; Atarashi-Andoh, Mariko; Ishizuka, Shigehiro*; Hiradate, Shuntaro*; Kokubu, Yoko
no journal, ,
Microbial decomposition of soil organic carbon (SOC) is an important component of the global carbon (C) cycle, and even a small warming-driven change in the size and decomposition rate of SOC pools could significantly impact the atmospheric CO concentration and thus the global C cycle. A quantitative understanding of heterogeneity of SOC degradability is essential for a reliable prediction of the response of soils to warming. While fast-cycling SOC pools dominate C fluxes from soils, the longer-term response of soils to warming will be largely determined by the sizes and turnover times of slow-cycling SOC pools in the soils, which can hardly be identified by conventional analytical and incubation methods. We attempted to characterize SOC pools with respect to their sizes and specific turnover times in Japanese forest soils, by a combinatorial use of SOC fractionation and 
C analysis. We represent the soils as a mixture of SOC pools with different turnover times ranging from years to more than a millennium, and on the basis of this representation and simple model calculations, we show the potential importance of slow-cycling SOC pools with turnover times of several decades to 200 years for the prediction of positive feedback to climate change over the next century.
Koarashi, Jun; Atarashi-Andoh, Mariko; Takagi, Kentaro*; Kondo, Toshiaki*; Teramoto, Munemasa*; Nagano, Hirohiko; Kokubu, Yoko; Takagi, Masahiro*; Ishida, Sachinobu*; Hiradate, Shuntaro*; et al.
no journal, ,
It is possible that global warming will promote the decomposition of soil organic carbon (SOC) and cause further global warming. In this study, the quantity and quality of SOC (carbon and nitrogen content, stable and radioactive carbon isotope composition, etc.) were investigated in warming and control plots at five forest sites in Japan, where long-term soil warming experiments have been conducted. Results show no remarkable difference in the quantity and quality of SOC stored in surface (0-20 cm) soils between the warming and control plots, suggesting the warming-induced increase in the soil respiration will continue over the next decade, probably due to the abundant SOC storage in Japanese forest surface soils.
Wijesinghe, J.*; Koarashi, Jun; Atarashi-Andoh, Mariko; Kokubu, Yoko; Yamaguchi, Noriko*; Sase, Takashi*; Hosono, Mamoru*; Inoue, Yuzuru*; Mori, Yuki*; Hiradate, Shuntaro*
no journal, ,
Koarashi, Jun; Atarashi-Andoh, Mariko; Takagi, Kentaro*; Kondo, Toshiaki*; Teramoto, Munemasa*; Nagano, Hirohiko; Kokubu, Yoko; Takagi, Masahiro*; Ishida, Sachinobu*; Hiradate, Shuntaro*; et al.
no journal, ,
no abstracts in English
Hiradate, Shuntaro*; Wijesinghe, J. N.*; Koarashi, Jun; Atarashi-Andoh, Mariko; Sase, Takashi*; Hosono, Mamoru*; Inoue, Yuzuru*; Mori, Yuki*
no journal, ,
no abstracts in English
Nagano, Hirohiko*; Nakayama, Masataka; Katata, Genki*; Fukushima, Keitaro*; Yamaguchi, Takashi*; Watanabe, Makoto*; Atarashi-Andoh, Mariko; Tateno, Ryunosuke*; Hiradate, Shuntaro*; Koarashi, Jun
no journal, ,
Koarashi, Jun; Atarashi-Andoh, Mariko; Liang, N.*; Kondo, Toshiaki*; Takagi, Kentaro*; Hirano, Takashi*; Takagi, Masahiro*; Ishida, Sachinobu*; Teramoto, Munemasa*; Nagano, Hirohiko*; et al.
no journal, ,
no abstracts in English
release by dry-wet cyclesNagano, Hirohiko*; Suzuki, Yuri*; Hiradate, Shuntaro*; Atarashi-Andoh, Mariko; Koarashi, Jun
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release increase under dry-wet cyclesSuzuki, Yuri*; Nagano, Hirohiko*; Hiradate, Shuntaro*; Atarashi-Andoh, Mariko; Abe, Yukiko; Koarashi, Jun; Nakayama, Masataka
no journal, ,
Alam, M. M.*; Yamakita, Eri*; Mori, Yuki*; Koarashi, Jun; Atarashi-Andoh, Mariko; Abe, Yukiko; Nakayama, Masataka; Hiradate, Shuntaro*
no journal, ,
release due to dry-wet cycles using surface and buried soilsSuzuki, Yuri*; Hiradate, Shuntaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Nakayama, Masataka*; Suzuki, Kazuki*; Abe, Yukiko; Nagano, Hirohiko*
no journal, ,
no abstracts in English
emission and change in soil microbial biomass under drying and wetting cyclesSuzuki, Yuri*; Nagano, Hirohiko*; Suzuki, Kazuki*; Hiradate, Shuntaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Abe, Yukiko; Nakayama, Masataka*
no journal, ,
no abstracts in English
release increase and microbial community sift under dry-wet cycles; Comparison of surface soils and buried humus layersSuzuki, Yuri*; Nagano, Hirohiko*; Suzuki, Kazuki*; Hiradate, Shuntaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Abe, Yukiko; Nakayama, Masataka*
no journal, ,
Nishimura, Shusaku; Hiradate, Shuntaro*; Atarashi-Andoh, Mariko; Koarashi, Jun
no journal, ,
no abstracts in English
