Biochar and Earthworm Effects on Soil Nitrous Oxide and Carbon Dioxide Emissions

摘要: Biochar is the product of pyrolysis produced from feedstock biological origin. Due to its aromatic structure and long residence time, biochar may enable long-term carbon sequestration. At same has potential improve soil fertility reduce greenhouse gas (GHG) emissions soils. However, effect application on GHG fluxes must be investigated before recommendations for field-scale can made. A laboratory experiment was designed measure dioxide (CO) nitrous oxide (NO) two Irish soils with addition different biochars, along endogeic (soil-feeding) earthworms ammonium sulfate, assist in overall evaluation as a GHG-mitigation tool. significant reduction NO observed both low high organic matter when biochars were applied at rates 4% (w/w). Earthworms significantly increased more than 12.6-fold 7.8-fold, respectively. The large increase presence reduced by biochars. earthworm 91 95% 56 61% (with without N fertilization), With peanut hull biochar, 80 70% soil, only 20 10% In CO efflux absence earthworms. This study demonstrated that potentially earthworm-enhanced emissions. Hence, combined activity did not reveal unknown risks pot scale, but experiments are required confirm this.