FIELD EVALUATION OF METHODS FOR REDUCTION OF N20 EMISSIONS

摘要

Conservation tillage is being promoted as a means of carbon sequestration. There is currently some debate of the effects of no-till on nitrous oxide (N2O) emissions. Mummey et al. (1998) noted that N2O emissions increased with no-till while Kessavalouet al. (1998) found N2O emissions to decrease with no-till. Increases in N20 emissions with minimum tillage would counter benefits to carbon sequestration.Possible mitigation strategies for reduction of N2O emissions therefore need to be investigated. Understanding the factors controlling N2O release will help predict and explain the final outcome of this study. Management practices influencing the nitrification and denitrification processes are of particular importance as they are the main source of N2O in agricultural soils.