The article and abstract are in french.
Methane is considered as one of the principal greenhouse gas. Among the potential methane sources coming from agriculture, the emissions resulting of anaerobic manure fermentation during storage can be considered as a specific source. Laboratory measurements were done to determine the carbon emissions (CH4, CO2) from stored swine manure. Two trials of 50 days each were realized on manure stored in a laboratory reactor and measurements were done using infra-red gas absorption technique. Direct measurements were compared to indirect evaluation by measurements of the diminution of the C concentration in the manure.Different ventilation regimes over the manure resulted in different levels of C losses that could reach 12,5% of the initial C content over the trial period compared to 5% for closed reactor. Different manure were tested to verify the variation in their C losses. The higher C losses were mesured for the raw manure with 18,9% and strained manure with 18,8%, lower C losses were observed with aerated manure. Of those C losses in the case of raw manure and strained manure the portion of CH4 of those losses was 60 % compred to 6% for the aerated manure. Slightly higher values for the C losses were obtained with the indirect measures with 20,8%, 23,4% and 5,1% respectively.