Reducing Ammonia Emissions from Dairy Cattle Production via cost-effective manure management techniques in China

Specifically, these included diet manipulation, manure acidification, manure/slurry covers, and solid manure compaction. Ammonia emissions for China were estimated using the GAINS and NUFER models, while mitigation potentials of technologies were determined from laboratory studies.

Ammonia reduction potentials from dairy production in China ranged from 0.8 to 222 Gg NH3 year−1 for the selected technologies. Implementation costs ranged from a savings of US $15 kg−1 NH3 abated to an expenditure of US$45 kg−1 NH3 abated, while the total implementation costs varied from a savings of US$1.5 billion in 2015 to an expenditure of a similar size. The best NH3 reduction technology was manure acidification, while the most cost-effective option was diet optimization with lower crude protein input.