Influence of Biochars on Nitrous Oxide Emission and Nitrogen Leaching from Two Contrasting Soils.

The article presents a study which evaluates the effect of biochars on nitrogen leaching and nitrous oxide emission from Vertisols and Alfisols. It states that the repacked soil columns were subdued to three wetting-drying (W-D) cycles to attain a variety of water-filled pore space (WFPS). Throughout the first two W-D cycles, wood biochar synthesized at 400 °C and 550 °C had contrasting effects on nitrous oxide emissions and the soils changed with poultry manor biochars synthesized at 400 °C generated higher nitrous oxide emissions. Throughout the third W-D cycle, all biochars consistently reduced nitrous oxide emissions. It concludes that increased biochar efficiency in decreasing nitrous oxide emissions was due to biochars' sorption capacity.