Evaluation of ammonia emission characteristics according to outside temperature variation from swine finishing barn installed with ground channel ventilation system

This study was conducted to evaluate the ammonia emission characteristics depend on outside temperature variation, from swine finishing barn installed with ground channel ventilation system. Because temperatures of air were tempered in before flowed into barn, seasonal differences rate not greater than general levels. Therefore, cold weather emissions (62.4 ± 9.4 g day-1 AU-1) higher those (54.8 6.3 hot (p < 0.05), which result different trend. In case control system caused less during and weather, it is possible improve room condition reduce emissions.