Farm-Scale Applicability of Three Covers Peat, Polystyrene Balls and Synthetic Sheet Roof to Reduce Ammonia Emissions from Pig Slurry StorageReport as inadecuate




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Covering the slurry pit has been shown to be one of the best ways to reduce ammonia emissions NH3 during manure management. Yet, few studies have been conducted at farm scale. We studied the feasibility of three cover materials peat, polystyrene balls and synthetic sheet roof to reduce ammonia NH3 emissions during on-farm storage of pig slurry. The impact on greenhouse gas emissions, methane CH4, nitrous oxide N2O and carbon dioxide CO2 of covering the slurry pit was also evaluated. Simultaneous field experiments were carried out using two similar pits at a farm with peat and polystyrene ball covers, which allowed direct comparison of the feasibility of the two covers to reduce gas emissions measured using the dynamic chamber technique. Emissions from the third option using a synthetic sheet roof were estimated by measuring the concentrations in the headspace under the cover and the air leakage from the cover with a tracer gas CO2. Results showed that the polystyrene balls cover reduced emissions of NH3 during storage by up to 80% whatever the season, but increased potential greenhouse gas emissions by 20% in summer. No consistent reduction was achieved with the peat cover even though some individual results seemed to indicate up to 25% reduction in ammonia emissions; moreover, there was a 30% increase in CH4 and CO2 emissions during the storage period. The use of a synthetic sheet roof enabled up to 90% reduction in NH3, CH4 and CO2 emissions whatever the season.

KEYWORDS

Ammonia, Slurry, Covers, Farm-Scale Measurement, Pig

Cite this paper

Loyon, L. , Guiziou, F. , Picard, S. and Saint-Cast, P. 2016 Farm-Scale Applicability of Three Covers Peat, Polystyrene Balls and Synthetic Sheet Roof to Reduce Ammonia Emissions from Pig Slurry Storage. Agricultural Sciences, 7, 396-406. doi: 10.4236-as.2016.76041.





Author: Laurence Loyon1,2, Fabrice Guiziou2, Sylvie Picard1,2, Patricia Saint-Cast1,2

Source: http://www.scirp.org/



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