Higher ambient temperature and higher manure moisture content favour CH4 emissions (6 Table 3).
Cooling of slurry below slatted floors to 10°C has been found to reduce CH4 emissions by 30-46% compared to the situation without cooling (Sommer et al., 2004; Groenestein et al., 2012). Efficacy will depend on the methanogenic potential of the slurry. Studies find significant (50-86%) reductions in GHG emissions (CH4+N2O) from pig housing with frequent manure removal (Groenestein et al., 2012).
Source: AnimalChange (project funded by EU - FP7)
DELIVERABLE 6.2. Deliverable title: Report on the extent to which manure management might help decrease GHG gas from animal agriculture.