Articles | Volume 12, issue 1
https://doi.org/10.5194/soil-12-521-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-12-521-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Original research article
| 
01 May 2026
Original research article |
| 01 May 2026
| 01 May 2026
Formation of mineral-associated organic matter via rock weathering: an experimental test for the organo-metallic glue hypothesis
Kaori Matsuoka
CORRESPONDING AUTHOR
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan
Jo Jinno
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan
Hiroaki Shimada
Research Center for Global Agromedicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, 080-8555, Japan
Emi Matsumura
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan
Ryo Shingubara
Research Center for Advanced Analysis, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan
Puu-Tai Yang
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Tsukuba, 305-8604, Japan
present address: Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, 113-8657, Japan
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Short summary
The organo-mineral assemblage formation from the mixture of crushed rocks and leaf compost was promoted by (i) microbial re-working of OM (indicated by lower C:N and higher δ13C and δ15N compared to the original leaf compost) and (ii) the supply of extractable metals (esp. oxalate-extractable Fe phase) from the rock weathering. These findings supported the organo-metallic glue hypothesis (Wagai et al., 2020) and suggest that C accretion during early pedogenesis.
The organo-mineral assemblage formation from the mixture of crushed rocks and leaf compost was...
