Nitrous Oxide Emission from a Silty-Loamy Soil due to on surface and subsurface application of Pig Slurry

CARRIZO, ME.; NICOLIER, J.; MASOLA, M.J.; GREGORUTTI, V.; IMHOFF, S.

Paris

Congreso; 21ST ISTRO INTERNATIONAL CONFERENCE; 2018

ISTRO

Nitrous oxide (N2O) is a potent greenhouse gas that can be emitted by agricultural soils, with a global warming potential 298 times greater than carbon dioxide. Livestock industry has been identified as a significant sources of N2O. Emissions of N2O are inevitable and derive from urine and feces deposited in the animal stables, manure store, manure treatment systems and manure application to the soil. Animal manure contains organic and inorganic nitrogen, carbon and water that provide the essential substrates required for the microbial production of N2O during the nitrification and denitrification processes (Chadwick et al. 2011). The impact of the manure application strategy on the soil N2O emission is variable and depends on the physical state of the manure, between other factors. In Argentina the use of manure as fertilizer, like the pig slurry, is increasing due to the continuous increase of pig production. However, information on N2O emissions from pig slurry in soils under no-till in Argentina is still scarce and differences on N2O emission caused by the use of different systems of application were not studied. The aims of this study was to quantify the N2O emission from a silty-loamy soil of Argentina due to pig slurry application throughout different systems.