과수원에서 사과 및 배 재배 시 복합비료 시용에 따른 암모니아 배출계수 평가

Abstract

BACKGROUND: Ammonia is known as a precursor to fine particulate matter, and according to CAPSS, annual ammonia emissions in the agricultural sector were 249,777 tons as of 2018, accounting for about 79.0% of Korea's total ammonia emissions. In particular, ammonia emissions from agricultural land increased by 19,566 tons (10.2%) compared to the previous year. The Ministry of Environment is setting emission statistics using the am-monia emission coefficient developed in Korea in 2008, but researchers in the agricultural field regard it as a co-efficient that does not reflect the reality of Korea's agricul-tural environment. Accordingly, in order to develop am-monia emission coefficients from the cultivation of ap-ples and pears, Korea's representative fruit type, test agricultural land was set in Iksan, Jeollabuk-do. METHODS AND RESULTS: This study attempted to obtain the ammonia emission coefficient by the treatment of the composite fertilizer (N-P2O5-K2O=12-7-9), and the flux was measured using a dynamic flow-through cham-ber method. As for the chamber, a total of 12 chambers were installed repeatedly in 4 zones and used to develop emission coefficients. Using compound fertilizers during fruit tree cultivation, the ammonia emission coefficient was evaluated as 10.4 kg NH3/ton for pears and 15.3 kg NH3/ton for apples. The reason why the ammonia emis-sion coefficient according to the use of composite fertil-izers was calculated higher for apple cultivation is be-lieved to be due to the relatively high pH concentration of apple orchard soil. CONCLUSION(S): This study may provide basic data for upgrading the ammonia emission coefficient when using composite fertilizers in agricultural land. In the future, it might be necessary to upgrade the calculation of emissions through the development of ammonia and fine par-ticulate matter emission coefficients considering the agri-cultural environment of Korea.