Erfassung gasförmiger Emissionen in Auslaufflächen eines Jungviehstalles mittels aktiver Probenahmehaube

In organic farming, open-casr systems with open yards are used for keeping cattle under the provisions of the EC-Ecological Basic Regulation 834/2007. The purpose of this study is to provide an initial assessment of typical gas concentrations in the emission of open yards of cattle husbandry. From these data and further surveys, emission factors for naturally ventilated stable systems of cattle farming are to be derived in the future. In several measurements the open yards of different groups of inseminated cattle or cattle in calf respectively were investigated for emissions of gaseous substances such as ammonia (NH3), methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O). The measurements were made by using an active sampling hood. Significant differneces between background and open yards were found for the ammonia concentrations. Further measurements, particularly at higher ambient temperatures, are necessary for hte derivation of emission factors.