Effect of the land spreading technique on ammonia volatilization from different pig slurries applied on wheat stubble

Loyon, L.; Guiziou, Fabrice; Dupard, P.; Saint Cast, P.

Effect of the land spreading technique on ammonia volatilization from different pig slurries applied on wheat stubble

2013

Loyon, L. | Guiziou, Fabrice | Dupard, P. | Saint Cast, P.

Field experiments were carried out in Brittany (Western France) in 2012 to measure and compare the ammonia losses after surface and incorporation application of fattening and farrowing-gestating pig slurry. Experiments were conducted on wheat stubble. Ammonia emissions were measured by using wind tunnels method. The results show a reduction of the ammonia emission by incorporation compared to the broadcast spreading whatever the slurry. However, the reduction of ammonia volatilization by incorporation technique is lower with the farrowing/gestating (65% of reduction) compared to the fattening slurry (97% of reduction). This lower reduction was associated with a lower Total Ammonia Nitrogen emissions in farrowing slurry (16% of the N-NH4 + applied) compared to the fattening slurry (74% of the N-NH4 + applied). The lower ammonia emission were attributed to low dry matter content and ammonium level in farrowing/gestating compared to the fattening slurry.

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