Fang, Y., Tavakkoli, E., Weng, Z., Collins, D., Harvey, D., Karimian, N., Luo, Y., Mehra, P., Rose, M.T., Wilhelm, N. & Van Zwieten, L. (2022) Disentangling carbon stabilization in a Calcisol subsoil amended with iron oxyhydroxides: a dual-13C isotope approach. Soil Biology and Biochemistry 170 108711. https://doi.org/10.1016/j.soilbio.2022.108711
Highlights
- Dual-13C enabled partitioning of 3-carbon sources (exogenous C, SOC, and SIC).
- Fe oxyhydroxides (goethite, ferrihydrite) decreased glucose-C mineralization by ∼17%.
- Fe oxyhydroxides decreased glucose (rhizodeposit) induced SOC priming by ∼22%.
- Stabilization of OC (glucose + SOC) by Fe oxyhydroxides increased with increasing the dose.
- Glucose increased loss of SIC regardless of Fe oxyhydroxides presence, dose, or type.