Effects of Biochar Amendments On Greenhouse Gas Emissions in Soils Applied With Different Nitrogen Fertilizers.

Biochar addition to agricultural soil has drawn much attention to mitigate atmospheric carbon through increased biogenic carbon storage and reduction of greenhouse gas emission. In laboratory incubation study, we measured biochar application effect on fluxes of N₂O, CO₂, and CH₄ by different types of N fertilizers applied to sugarcane and rice paddy soils during a 3 month. In addition, field trials of biochar application were performed in rice and sugarcane fields to measure emission of N₂O, CO₂, and CH₄ with a closed chamber method throughout the whole rice and sugarcane growing season. Total N₂O emissions were sharply decreased by in biochar amended soils with N fertilization. Results of laboratory incubation and field studies on biochar application effect on greenhouse gas emission will be presented.