Articles | Volume 7, issue 2
SOIL, 7, 585–594, 2021
https://doi.org/10.5194/soil-7-585-2021
SOIL, 7, 585–594, 2021
https://doi.org/10.5194/soil-7-585-2021

Original research article 06 Sep 2021

Original research article | 06 Sep 2021

Soil organic carbon mobility in equatorial podzols: soil column experiments

Patricia Merdy et al.

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Cited articles

Balesdent, J., Basile-Doelsch, I., Chadoeuf, J., Cornu, S., Derrien, D., Fekiacova, Z., and Hatté, C.: Atmosphere–soil carbon transfer as a function of soil depth, Nature, 559, 599–602, https://doi.org/10.1038/s41586-018-0328-3, 2018. 
Batjes, N. H.: Total carbon and nitrogen in the soils of the world, Eur. J. Soil Sci., 47, 151–163, https://doi.org/10.1111/j.1365-2389.1996.tb01386.x, 1996. 
Birkel, C., Duvert, C., Correa, A., Munksgaard, N. C., Maher, D. T., and Hutley, L. B.: Tracer-aided modeling in the low-relief, wet-dry tropics suggests water ages and DOC export are driven by seasonal wetlands and deep groundwater, Water Resour. Res., 56, e2019WR026175, https://doi.org/10.1029/2019WR026175, 2020. 
Boeglin, J. L., Ndam., J. R., and Braun, J. J.: Composition of the different reservoir waters in a tropical humid area: example of the Nsimi catchment (Southern Cameroon), J. Afr. Earth Sci., 37, 103–110, https://doi.org/10.1016/S0899-5362(03)00041-1, 2003. 
Chen, W., Westerhoff, P., Leenheer, J. A., and Booksh, K.: Fluorescence ExcitationEmission Matrix Regional Integration to Quantify Spectra for Dissolved Organic Matter, Environ. Sci. Technol. 37, 5701–5710, https://doi.org/10.1021/es034354c, 2003. 
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Short summary
Transfer of organic C from topsoil to deeper horizons and the water table is little documented, especially in equatorial environments, despite high primary productivity in the evergreen forest. Using column experiments with podzol soil and a percolating solution sampled in an Amazonian podzol area, we show how the C-rich Bh horizon plays a role in natural organic matter transfer and Si, Fe and Al mobility after a kaolinitic layer transition, thus giving insight to the genesis of tropical podzol.