Influence of rearing conditions and manure management practices on ammonia and greenhouse gas emissions from poultry houses

Poultry production has been identified as a major producer of NH3 and, to a lesser extent, of greenhouse gases (GHGs) mainly by national emissions inventories. However, since most national inventories are based on average emission factors for each type of animal (‘tier 1’ approach), the factors that influence these emissions (through breeding and manure-management practices) are not taken into account.   The first step to improve inventories and propose mitigation options (e.g. best