Methods for Measurement of Methane and Nitrous Oxide Emissions from Agricultural Fields

경작지(耕作地)에서 메탄 및 아산화질소(亞酸化窒素) 배출량(排出量) 측정방법(測定方法)

A simplified closed static chamber method was devised for measurement of methane flux from paddy fields. Compared to automatic methane measuring system(AMMS) this chamber method provides availability with moderate costs of setup and maintenance, while it also provides the time-effectiveness compared to other closed top-type chamber method. It accomodates 30 chambers within 2 hours sampling period with two persons. And it provide a rapid and accurate analysis of methane, 30-40 samples per hour. Modified method for $N_2O$ measurements provides a precise and accurate analysis of nitrous oxide without upgrading additional heating zones for gas sampling(switching) valves.