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| Registros recuperados: 11 | |
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| Regina, Kristiina. |
| Cultivated organic soils are a remarkable source of greenhouse gases (GHG) in some countries and raised ground water table has been suggested as a mitigation measure on these soils. Drainage of the peat increases mineralization of the organic matter and causes high emissions of carbon dioxide (CO2) and nitrous oxide (N2O) while emissions of methane (CH4) are lowered compared to pristine peatlands. In countries with a large area of organic soils these GHG emissions can be remarkable. In Finland, the area of cultivated organic soils is 12% of the agricultural area but they cause 30% of the N2O emissions of agricultural soils reported under the Climate Convention of the UNFCCC. Organic croplands are also the largest single emission source of CO2 among the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil. |
| Ano: 2010 |
URL: http://orgprints.org/17293/1/Regina.doc |
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| Rankinen, Katri; Palojärvi, Ansa; Regina, Kristiina; Pietola, Liisa; Granlund, Kirsti; Uusi-Kämppä, Jaana. |
| The retention of nutrients by 10-m-wide grass buffers and buffers under natural vegetation has been studied over 10 years in Jokioinen in southwestern Finland. The results have been compared with those from 70-m-long plots without buffers. Grass was sown on the adjacent field and plots without buffers in 2002, and the field plots and these were grazed for 12 and 24 days in summer 2003 and 2004, respectively. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects. |
| Ano: 2006 |
URL: http://orgprints.org/16261/1/pollutants3.pdf |
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| Regina, Kristiina; Simojoki, Asko; Alakukku, Laura; Silvennoinen, Hanna; Dörsch, Peter; Keller, Thomas. |
| Compaction occasionally increased N2O in soil air. No large differences in soil air composition, N2O emissions or moisture content were found between the treatments. The N2O concentrations at 15, 30, 50 and 70 cm depths correlated positively with the emission of N2O from the soil in both fields (r=0.4-0.7***). The subsoil O2 concentrations correlated negatively with N2O emission, but only at the Finnish site. The results suggest that subsoil compaction does not significantly increase N2O emissions from these soils 15-30 years after compaction. This may indicate a minor role of subsoil in the production of N2O compared with topsoil. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil. |
| Ano: 2011 |
URL: http://orgprints.org/19576/1/Regina.pdf |
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| Uusi-Kämppä, Jaana; Turtola, Eila; Regina, Kristiina; Ylivainio, Kari; Österholm, Peter; Yli-Halla, Markku; Virtanen, Seija; Nuotio, Eeva. |
| Project: Climate change adaptation tools for environmental risk mitigation of acid sulphate soils (CATERMASS) Funding: Life+ Environment policy and governance 2008-C1 Coordinator: Finnish Environment Institute (SYKE) Partners: Geological Survey of Finland (GTK), MTT Agrifood Research Finland, Finnish Game and Fisheries Research Institute (RKTL), Centre for Economic Development, Transport and the Environment, University of Helsinki, Åbo Academi University Action 3: Mitigation methods and their adaptation to changing climate conditions |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects. |
| Ano: 2011 |
URL: http://orgprints.org/19575/1/Uusikamppa.pdf |
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| Chatskikh, Dmitri; Olesen, Jørgen E.; Berntsen, Jørgen; Regina, Kristiina; Yamulki, Sirwan. |
| Local adaptations of the IPCC methodology (http://www.ipcc.ch) are applied in different countries. They include a combination of theoretical, experimental and simulation methods for evaluating the activity and factors indicated N2O emission. The N2O emission from agricultural soil is considered an important source both for environmental impact and non-industrial losses of nitrogen (Petersen, Olesen, 2002). In this study a multifactorial approach, based on dynamic modelling, is used at a farm/field level to estimate N2O emission from grassland. For this purpose an algorithm for modeling of gaseous N2O emission was developed and analyzed. In the algorithm, based on the conceptual process-oriented model HIP (Davidson et al., 2000), both nitrification and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2003 |
URL: http://orgprints.org/4130/1/4130.doc |
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| Registros recuperados: 11 | |
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