Ammonia emissions damage the environment and have negative consequences for human and animal health. In the German livestock sector, most ammonia emissions come from naturally ventilated dairy barns. To reduce emissions, Germany has signed the EU Directive 2016/2284 to achieve a stepwise decrease in the ammonia emissions ceiling. The aim of this study was to investigate the seasonal mitigation effect of a urease inhibitor under practical conditions and provide information relating to two theoretical application scenarios in order to estimate an annual application scenario. The experimental design was conducted according to the requirements of the Verification of Environmental Technologies for Agricultural Production test protocol using the CO₂ balance method to obtain the emissions. In a manual process, the inhibitor was applied to the floor surfaces of two dairy farms. The application took place once a day over three days during summer, winter and the transition period (spring/autumn). The ready-to-use liquid formulation of 1% inhibitor K dissolved in pyrrolidone was mixed with water resulting in 2.5 mg m⁻² application rate of inhibitor and 50 ml m⁻² water. The ammonia emissions on Farm A and Farm B were reduced by 40% and 53% in summer, 65% and 68% in winter and 64% and 54% in transition period, respectively. Thus, an annual reduction of 58% on Farm A and 57% on Farm B was observed. In a theoretical scenario where no inhibitor was applied during winter, up to 41% of the annual reduction was observed.

氨气排放会破坏环境并对人类和动物健康产生负面影响。在德国的畜牧业中，大部分氨气排放来自自然通风的奶牛舍。为了减少排放，德国已签署了欧盟指令2016/2284，以逐步降低氨排放上限。这项研究的目的是研究尿素酶抑制剂在实际条件下的季节性缓解效果，并提供与两个理论应用方案有关的信息，以便估算年度应用方案。根据“农业生产环境技术验证”试验方案的要求，使用CO ₂进行了实验设计。平衡法获得排放量。在手动过程中，将抑制剂应用于两个奶牛场的地板表面。在夏季，冬季和过渡时期（春季/秋季），为期三天，每天进行一次申请。将溶解在吡咯烷酮中的1％抑制剂K的即用型液体制剂与水混合，以产生2.5 mg m ^-2的抑制剂和50 ml m ^-2的水。农场A和农场B的氨气排放分别在夏季减少了40％和53％，在冬季减少了65％和68％，在过渡期减少了64％和54％。因此，观察到农场A的年度减少量为58％，农场B的年度减少量为57％。从理论上讲，冬天没有使用抑制剂，可以观察到每年减少量高达41％。