Ammonia volatilisation from pig slurry and ANS with DMPP applied to Westerwold ryegrass (Lolium multiflorum Lam., cv. Trinova) under Mediterranean conditions

The interaction between types of cover crop residue and digestate application methods affects ammonia volatilization during maize cropping season

“…Conversely, injection reduces contact with the atmosphere, provides protection from wind, and increases the ammonia's reactivity with H + ions in the soil, changing to the cationic form of NH 4 + , which temporarily prevents the transformation to NH 3 –N (Misselbrook et al., 2005; Sommer et al., 2006). The reduction of NH 3 emission by injection was also confirmed by other studies (e.g., Misselbrook et al., 2005; Vilarrasa‐Nogué et al., 2020; Yagüe et al., 2019). Here we show that the positive effect of INJ increased in tandem with greater amounts of biomass present on the soil surface at the moment of digestate distribution.…”

Environmental impact of pig production affected by wet acid scrubber as mitigation technology

“…In cold seasons, windows are kept closed most of the time, which is not the case in warm seasons. In addition, it is known that temperature is positively correlated with NH 3 emissions (Vilarrasa-Nogué et al, 2020), thus in warm seasons NH 3 volatilisation is higher and it is more difficult to capture this gas in naturally ventilated buildings. Consequently, NH 3 removal efficiency of 80% has been assumed for cold seasons and 60% for warm seasons.…”