Monitoring NH3, N2O, CO2 and CH4 Emissions During Pig Solid Manure Storage — Effect of Turning

In France, as in other countries, there is a need to improve knowledge of greenhouse gas and ammonia emissions from livestock production with various management options. The aim of this study was to quantify the NH3, N2O, CO2 and CH4 emissions from two pig solid manure heaps, turned and not turned, in order to examine the effect of turning on gaseous emissions and to obtain additional information about emissions during composting in commercial conditions. The manure produced from the fattening of 72 pigs on straw bedding was divided between two identical heaps and stored outside on a concrete area for three months during autumn 2004. One heap was turned at day 0, 11 and 27. Gaseous emissions (NH3, N2O, CH4, CO2, H2O) of both heaps, covered for the purpose by ventilated greenhouses, were continuously measured over four periods (57 days in total). The tracer method, using SF6, was used to measure the ventilation rate in the greenhouses. Concentrations inside and outside the greenhouses (to have a differenti...