Korean Journal of Soil Science and Fertilizer ISSN:0367-6315(Print) 2288-2162(Online) 한국토양비료학회 학회지

Ammonia (NH₃) gas is the agent of the secondary particulate matter (PM_2.5) generated from crop fields amended with organic and inorganic fertilizer application. The purpose of this study is to provide a more reasonable method of calculating NH₃ emissions by comparing amounts of NH₃ gas emitted in the soil surface and plant canopy in red pepper cultivated field. And we used two types of dynamic chamber such as soil surface chamber and plant canopy chamber, for comparing seasonal NH₃ emissions. Ammonia estimated by soil surface and plant canopy chamber methods were 36.4% and 24.1% of total nitrogen applied to field, respectively. The lower NH₃ emission in plant canopy chamber method than that in soil surface chamber method should be attributed to absorption of NH₄⁺ and/or NH3 by plants. Though soil surface chamber method is widely used, it is necessary to develop method for more accurate estimation of NH₃ emission from crop fields.

Seasonal ammonia emissions measured by plant canopy chamber was 12.3% lower than that measured by soil surface chamber.