摘要 : Emissions of NH4 (ammonia), CH4 (methane), CO2 (carbon dioxide), N2O (nitrous oxide) and odour were measured in a freely ventilated cow house with stalls for 55 dairy cows and 20 calves. Gas concentration was measured continuously... 展开 Emissions of NH4 (ammonia), CH4 (methane), CO2 (carbon dioxide), N2O (nitrous oxide) and odour were measured in a freely ventilated cow house with stalls for 55 dairy cows and 20 calves. Gas concentration was measured continuously in the 7 ventilation shafts on either side and in the vicinity of the animals. The results show considerable variations over the course of the day and that emissions are strongly influenced by the weather in freely ventilated housing. The equipment and method are described in detail. 收起