Greenhouse Gas Emissions from Forest Soils Reduced by Straw Biochar and Nitrapyrin Applications

Forestlands are widely distributed in the dominantly agricultural landscape western Canada, and they play important ecological functions; such forestlands (e.g., shelterbelts) accumulate soil organic matter may receive a substantial amount of nitrogen form surface subsurface runoff from adjacent croplands become significant source emissions greenhouse gases (GHGs) as CO2, N2O, CH4. Biochar nitrapyrin applications could potentially mitigate GHG emissions, but their co-application forest soils has not been studied. We investigated effect application biochars produced at low (300 °C; BC300) high temperatures (700 BC700) using canola (Brassica napus L.) straw with on properties 35-day laboratory incubation experiment collected five shelterbelt sites. Results showed no interaction biochar global warming potential (GWP) GWP was 15.8% lower than without treatments. The significantly enhanced by BC300 addition due to 26.9% 627.1% increase cumulative CO2 N2O respectively, over incubation. decreased BC700 27.1% decrease emissions. However, did affect CH4 while uptake 50.5%. With addition, soil-dissolved carbon microbial biomass increased 26.5% 33.9%, compared (CK). Soil pH 0.16 0.37 units after BC700, respectively. Overall, independent mitigating related type applied changes properties.