Biodegradation measurements confirm the predictive value of the O: C-ratio for biochar recalcitrance

Mo Bai, Burkhard Wilske, Franz Buegger, Esben Bruun, Martin Bach, Hans-Georg Frede, Lutz Breuer

Research output: Contribution to journalJournal articleResearchpeer-review


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.
Original languageEnglish
JournalJournal of Plant Nutrition and Soil Science
Issue number4
Pages (from-to)633-637
Publication statusPublished - 2014


  • Soil Science
  • Plant Science
  • Biochar
  • Biodegradability
  • HTC
  • O:C atomic ratio

Cite this