Impact of freeze-thaw cycles on greenhouse gas emissions in marginally productive agricultural land under different perennial bioenergy crops

• DOI: 10.1016/j.jenvman.2024.120739
• Publication Date: 2024-03-28T23:23:34Z
• Authors: Augustine K. Osei; Fereidoun Rezanezhad; Maren Oelbermann
• Keywords: Panicum virgatum

Knowledge of freeze-thaw-induced carbon (C) and nitrogen (N) cycling concomitant nitrous oxide (N2O) dioxide (CO2) emissions in perennial bioenergy crops is crucial to understanding the contribution these mitigating climate change through reduced greenhouse gas (GHG) emissions. In this study, a 49-day laboratory incubation experiment was conducted compare impact freeze-thaw cycles on N2O CO2 different [miscanthus (Miscanthus giganteus L.), switchgrass (Panicum virgatum willow (Salix miyabeana L.)] successional site understand processes controlling crops. The results showed that caused decline dissolved organic C (DOC) inorganic N (DIN) concentrations but enhanced (DON) nitrate (NO3−). Although, decreased water stable soil aggregates all site, did not have any significant emissions, suggesting emitted during may originated mostly from cellular materials released lysis death microbial biomass rather than aggregate disruption. Cumulative measured over period ranged 148 mg N2O–N m−2 17 were highest miscanthus followed by willow, switchgrass, site. other hand 25,262 CO2–C 15,403 after 49 days. Higher attributed accelerated losses as N2O. Results our study indicate managing low productive agricultural lands reduce related GHG mitigation dependent crop species grown.