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Ammonia volatilization from different pig slurries applied on wheat stubble using different land spreading techniques under French conditions
- Loyon, Laurence, Guiziou, Fabrice
- Agriculture, ecosystems & environment 2019 v.280 pp. 114-117
- ammonia, ammonium, ammonium nitrogen, dry matter content, emissions, farrowing, field experimentation, finishing, pig manure, slurries, stubble, volatilization, wheat, wind tunnels, France
- Field experiments were conducted in Brittany (western France) in 2012 to measure and compare ammonia emissions after surface application and injection of fattening and farrowing-gestating pig slurry. Experiments were conducted on wheat stubble. Ammonia emissions were measured using wind tunnels. The results showed a reduction in ammonia emissions after injection compared to broadcast spreading whatever the slurry. However, the reduction in ammonia volatilization using the injection technique was less with the farrowing/gestating slurry (65% reduction) than with the fattening slurry (97% reduction). The lesser reduction was associated with lower emissions of total ammonia nitrogen in farrowing slurry (16% of the N-NH4+ applied) compared to the fattening slurry (74% of the N-NH4+ applied). The lower ammonia emissions were attributed to lower dry matter content and less ammonium in the farrowing/gestating pig slurry compared to the fattening pig slurry.