Nitrous Oxide Emission Factor from Russian Arable Soils at the Fertilizers Application
Nitrogen of the mineral fertilizers and organic amendments are being applied on the fields easily includes in the soil nitrogen biogeochemical cycle and contribute to the N<sub>2</sub>O emission to the atmosphere. To evaluate the regional agricultural soils contributions to the total Word emissions of greenhouse gasses the Intergovernmental Panel on Climate Change (IPCC) recommend to use emission factors (EF$_{{{{{\text{N}}}_{{\text{2}}}}{\text{O}}}}$) for calculations of national N<sub>2</sub>O inventories. The EF$_{{{{{\text{N}}}_{{\text{2}}}}{\text{O}}}}$ value depends on many factors: soil-climatic conditions, mineral fertilizer type, organic amendments, agricultural crop systems, and others. Nevertheless, default IPCC EF$_{{{{{\text{N}}}_{{\text{2}}}}{\text{O}}}}$ do not take into account differences between various N inputs to the soils and environmental conditions. The data on N<sub>2</sub>O emissions in the field conditions of Russia are very much restricted, and national N<sub>2</sub>O inventories are calculated accordingly IPCC Guidelines. IPCC EF$_{{{{{\text{N}}}_{{\text{2}}}}{\text{O}}}}$ are not good appropriate because very wide range of soil-climatic and environmental conditions in the Russia. We shall attempt to calculate EF$_{{{{{\text{N}}}_{{\text{2}}}}{\text{O}}}}$ at the fertilization of cereal and till crops on the base of literature and statistical data. Average EF$_{{{{{\text{N}}}_{{\text{2}}}}{\text{O}}}}$ for cereals was in range 0.66–0.70% and for till crops – 0.77–1.96.