The effect of an acidified-gypsum mixture on broiler litter urease-producing bacteria and nitrogen mineralization.

Ammonia (NH ) volatilization from broiler (Gallus gallus domesticus) litter is a microbially mediated process that can decrease bird productivity and serves as an environmental pollutant. The release of NH is strongly influenced by the pH of litter. Flue-gas desulfurization gypsum (FGDG) has been suggested as a potential amendment to reduce NH volatilization due to the pH buffering capacity of calcium carbonate (CaCO ) precipitation.