Ammonia emissions have a negative influence on both human and animal health as well as on the environment. Livestock farming, in particular the dairy sector, is a major source of ammonia emissions. Urease inhibitors may act as a suitable mitigation measure without requiring the high investments connected with, e.g., new floor surfaces in barn refurbishments. The main aim of this field study was to a) quantify the reduction potential of the urease inhibitor K and b) provide information on the chronological reduction response of the inhibitor. The experimental setup was based on an in time and a case–control approach, according to the requirements of the Verification of Environmental Technologies for Agricultural Production test protocol. The investigations were carried out in two mechanically-ventilated units of the Leeuwarden Dairy Campus. Both sets of investigations were performed over all seasons. A new liquid chemical formulation of the urease inhibitor K, was applied at a rate of 2.5 mg m⁻² when mixed with 50 ml m⁻² water. Urease activity was measured to confirm the reduction potential of the inhibitor. The in time approach found a seasonal reduction potential, where ammonia emissions were reduced by 17–23% in summer, 10–31% in winter and 22% in spring. The case–control approach found a reduction pattern with the highest reduction potential at the 16-h time slot. However, the time slot analysis found a decrease in reduction after the inhibition peak.

氨气排放对人类和动物健康以及环境都具有负面影响。畜牧业，特别是乳制品业，是氨气排放的主要来源。脲酶抑制剂可以作为一种适当的缓解措施，而无需进行大量投资，例如与谷仓翻新中的新地板表面相关。该现场研究的主要目的是：a）量化脲酶抑制剂K的还原潜力，b）提供有关该抑制剂按时间顺序还原反应的信息。根据“农业生产环境技术验证”测试规程的要求，实验设置基于及时和案例控制方法。调查是在吕伐登奶牛场的两个机械通风的单元中进行的。两组调查都是在所有季节进行的。尿素酶抑制剂K的新液体化学制剂以2.5 mg m^-2时用50毫升混合，中号^-2水。测量脲酶活性以确认抑制剂的还原潜力。及时方法发现了季节性减少的潜力，其中氨气排放量在夏季减少了17–23％，在冬季减少了10–31％，在春季减少了22％。病例对照方法发现了一种在16小时时隙中还原电位最高的还原模式。然而，时隙分析发现抑制峰后还原减少。