02352naa a2200313 a 450000100080000000500110000800800410001910000180006024501150007826000090019350001370020252012830033965000220162265000190164465000210166365000210168465000220170565300230172765300220175065300270177265300220179970000210182170000230184270000260186570000170189170000220190870000190193077300890194920977102018-10-18       2018    bl uuuu     u00u1 u    #d1 aSARDÁ, L. G.  aMethane emission factor of open deposits used to store swine slurry in Southern Brazil.h[electronic resource]  c2018  aTítulo em português: Fator de emissão de metano em depósitos abertos utilizados para armazenar dejetos suínos no Sul do Brasil.  aThe objective of this work was to contribute to the establishment of a baseline for the methane emission factor for the management of swine manure, considering the current practice of raw manure storage in two open deposits in parallel, in Southern Brazil. Methane (CH4) emissions were continuously measured in three PVC tanks of 3 m3, during 180 days, in the summer. As the content of volatile solids of pig slurry ran out in approximately 130 days, the CH4 emission factor was calculated as B0= 0.48 m3 kg-1 VS. Although this value is higher than the B0 estimated by Intergovernmental Panel on Climate Change for Latin America (0.29 m3 kg-1 VS), it is in agreement with the B0 estimated for developed countries (0.45 and 0.48 m3 kg-1 VS, for the US and EU, respectively). The graphic of accumulated CH4-C emission x time fitted a sigmoidal, kinetic model (r2= 0.998) that showed a good correlation when tested with the emission data collected from a slurry deposit, under field conditions, in winter. This suggests that the model reproduces the CH4 emission kinetics in the region. By applying the reviewed state law rules (retention time of 50 instead of 120 days), estimates by the sigmoidal equation show that it is possible to reduce in more than 80% methane gas emission.  aAnimal production  aGlobal warming  aGreenhouse gases  aWaste management  aProdução Animal  aAquecimento global  aFator de emissão  aGases de efeito estufa  aManejo de dejetos1 aHIGARASHI, M. M.1 aNICOLOSO, R. da S.1 aOLIVEIRA, P. A. V. de1 aFALKOSKI, C.1 aRIBEIRO, S. M. S.1 aCOLDEBELLA, A.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 53, n. 6, p. 657-663, June 2018