The objective of this study was to determine magnitude of ammonia emissions from dairy cattle free-stall barns with natural ventilation. The measurements of ammonia concentration and indoor environmental conditions in barns were done throughout the 4 days in three dairy farms in summer season. The overall hourly average temperature and relative humidity for all barns were 26.5°C and 61%, respectively. In monitored dairy cattle barns, ammonia concentrations were observed between 0.4 and 8.77 ppm. The overall hourly average ammonia emission was calculated as 56.1 g/h.barn. Ammonia concentrations increased with lower airflow rate while ammonia emissions increased with higher airflow rate. As a result of this study, there is no significant relationship observed between ammonia emission and indoor environmental conditions such as temperature and relative humidity.
展开▼
机译：这项研究的目的是确定自然通风的奶牛无档棚的氨气排放量。在夏季，在三个奶牛场的整个4天中，都对谷仓中的氨浓度和室内环境条件进行了测量。所有谷仓的总体小时平均温度和相对湿度分别为26.5°C和61％。在监测的奶牛棚中，观察到氨浓度在0.4至8.77 ppm之间。每小时的总平均氨排放量经计算为56.1 g / h.barn。氨浓度随着气流速率的降低而增加，而氨气排放则随着气流速率的增加而增加。这项研究的结果是，氨气排放与室内环境条件（例如温度和相对湿度）之间没有发现显着的关系。
展开▼
