Ammonia (NH₃) is the major source of N loss related to laying hen facilities. Previous studies are often based on continuous monitoring of NH₃ concentration and ventilation rate in the facilities during long periods. The objectives of this study were (i) to relate climate and production management parameters to model NH₃ emission, (ii) to check the accuracy of the proposed model and (iii) to evaluate the accuracy of reduced sampling strategies in estimating NH₃ emission. Four datasets of laying hen facilities located in areas representing different climates in Spain were used for model development and reduced sampling strategies evaluation. Indoor and outdoor temperatures, relative moisture, ventilation rate, NH₃ concentration, hen live weight and feed N consumption were introduced in the statistical analysis. Outdoor temperature was the main factor related to NH₃ emission. Tests showed that the variation between the model estimates and on-farm calculated NH₃ losses was, on average, ±15%. Four sampling frequencies were tested to evaluate reduced sampling strategies. The reduction of the sampling frequency resulted in an increase of estimation error ranging from <±10% for weekly to ±20% for bi-monthly sampling. It was concluded that (i) NH₃ emission estimation by using simple explanatory variables like outdoor temperature, and (ii) applying sampling reduction strategies can be feasible means to reduce the effort and labour demand of continuous monitoring by obtaining NH₃ emission estimates with an assumable associated error.

氨（NH ₃）是与蛋鸡设施有关的氮损失的主要来源。以前的研究通常基于长期监控设施中NH _3的浓度和通风率。这项研究的目的是（i）将气候和生产管理参数与NH ₃排放模型相关，（ii）检查所提出模型的准确性，以及（iii）评估减少采样策略估算NH ₃排放的准确性。位于西班牙代表不同气候的地区的四个蛋鸡设施数据集用于模型开发和简化抽样策略评估。室内和室外温度，相对湿度，通风率，NH ₃统计分析中引入了母猪的体重，母鸡活重和饲料氮消耗量。室外温度是与NH ₃排放有关的主要因素。测试表明，模型估算值与农场计算出的NH ₃损失之间的差异平均为±15％。测试了四个采样频率以评估简化的采样策略。采样频率的降低导致估计误差的增加，从每周的<±10％到双月的采样的±20％。结论是：（i）NH ₃通过使用简单的解释变量（例如室外温度）进行排放估算，以及（ii）应用采样减少策略可能是可行的方法，可以通过获得带有可能的相关误差的NH ₃排放估算来减少连续监测的工作量和劳动力需求。