Nitrous oxide emissions from Soddy podzolic sandy loam soil after long-term fertilizer and manure application

The objective of this study was to estimate direct N2O emissions from Soddy podzolic sandy loam soil after long-term manure and N-fertilizer application. Closed chamber technique was used to measure the fluxes from the soil with different treatments: (1) Control, (2) FYM 10 t ha-1 , (3) FYM 20 t ha-1 , (4) N50P25K60, (5) N25P12K30 + FYM 5 t ha-1 , (6) N50P25K60 + FYM 10 t ha-1 , (7) N100P50K120. The studied soil was characterized by very low direct N2O emission independent of the FYM or mineral fertilizer rates.

The information available on N2O emissions from agricultural soils in different countries varies widely. Emissions in Western Europe, the USA, Canada and elsewhere have been well documented (Stehfest and Bouwman 2006), but for some other countries, including Russia, there is almost no information available, except for soils of North-Western region and soils of Central Russia (Buchkina et al., 2009, 2010). The objective of this study was to estimate direct N2O emissions from Soddy podzolic sandy loam arable soil in Central Russia after long-term application of manure and mineral fertilizer in different rates.