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Direct N2O emission from agricultural soils in Poland between 1960 and 2009 |
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| Authors: | J Ny?kowiak J Le?ny L Merbold S Niu E Haas R Kiese K Butterbach-Bahl J Olejnik |
| Institution: | 1. Meteorology Department, Poznan University of Life Sciences, Piatkowska 94, 60-649, Poznan, Poland 2. Department of Environmental Systems Science, Institute of Agricultural Sciences, ETH Zurich, 8092, Zurich, Switzerland 3. Department of Botany and Microbiology, University of Oklahoma, Norman, OK, 73019, USA 4. Institute for Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Kreuzeckbahnstrase 19, 82467, Garmisch-Partenkirchen, Germany 5. Department of Matter and Energy Fluxes, Global Change Research Center, AS CR, v.v.i., Brno, Czech Republic |
| Abstract: | Nitrogen fertilization (N) is commonly known as a main source of direct nitrous oxide (N2O) emission from agricultural soils. An area of 38 % of the total land surface of Poland was covered by agricultural soils in 2009. In this paper, we aimed at analyzing data regarding the land exploitation for 13 selected subareas of Poland between 1960 and 2009. Seven out of the 13 subareas studied are located in the West (area A), and six subareas are located in southeast of Poland (area B). The total area covered by large farms (>20 ha) differed largely, between area A (10.6 %) and area B (0.9 %) in 2009. Both areas varied in terms of the amount of fertilizers used annually, average crop yield and crop structure. Average direct emissions of N2O from agricultural soils were 1.66 ± 0.09 kg N2O–N ha?1 a?1 for area A, 1.39 ± 0.07 kg N2O–N ha?1 a?1 for area B and 1.46 ± 0.07 kg N2O–N ha?1 a?1 for the whole country between 1960 and 2009. |
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