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|Title:||Measurements of Greenhouse Gas Emissions from Rice Cultivation in Italy|
|Authors:||SEUFERT GUENTHER; BOCCHI STEFANO; CONEN F.|
|Other Contributors:||LEIP ADRIAN|
|Citation:||Proceedings of the Fourth Temperate Rice Conference p. 30-31|
|Type:||Contributions to Conferences|
|Abstract:||The only country in Europe which uses a country-specific emission factor to estimate CH4 emissions from rice fields in their annual greenhouse gas inventory is Italy. The emission factor used is based on a studies performed in Italy in the 1980s and 1990s, and a reduction of the emission factor by 40% and 48% is applied for single and multiple aeration management regimes, respectively. The present paper will give an overview of measurements that have been made in Italy including own studies in the rice growing areas of Vercelli and Pavia. Emission rates of CH4 were up to 40 mg CH4 m-2 h-1 in Vercelli (Piemonte) for an early flooded field and up to 30 mg CH4 m-2 h-1 in a late flooded field. Higher emissions up to 60 mg CH4 m-2 h-1 were measured in two different rice fields in the Lombardia region. Both inter-annual variability and variability caused by management effects (fertilizer application rates, irrigation system, rice cultivar) were high. Seasonally integrated fluxes were 50-60 g CH4 m-2 in the Vercelli field with large reduction of the emissions for the late-flooding field with only approx. 12-17 g CH4 m-2. Due to the shorter vegetation period in the rice fields studied in Lombardia, the seasonally integrated fluxes were somewhat smaller with about 40 g CH4 m-2. Generally, these results support the average annual emission rate used by the Italian government, but also highlights the gaps in our understanding of the trade-offs for different management systems and the difficulties in estimating off-season greenhouse gas fluxes from rice cultivation.|
|JRC Institute:||Institute for Environment and Sustainability|
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