Suitable predictors of degradability are sought to support the identification of biochars with large potential to increase C sequestration in soils. We determined the biodegradation of 9 chars from hydrothermal carbonization and pyrolysis in two agricultural soils. The 200- and 115-day degradation correlated strongly with the O:C- and slightly with the H:C-atomic ratio of 9 and 14 biochars, respectively. Highest temperature treatment and ash content did not show similar correlations. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
- Soil Science
- Plant Science
- O:C atomic ratio
Bai, M., Wilske, B., Buegger, F., Bruun, E., Bach, M., Frede, H-G., & Breuer, L. (2014). Biodegradation measurements confirm the predictive value of the O: C-ratio for biochar recalcitrance. Journal of Plant Nutrition and Soil Science, 177(4), 633-637. https://doi.org/10.1002/jpln.201300412