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      A Case Study on Determining Ammonia Emission Factor from Complex Fertilizer Application in Apple Cultivated Soil

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      https://www.riss.kr/link?id=A107946433

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      다국어 초록 (Multilingual Abstract)

      Ammonia (NH₃) is a precursor of secondary-generated particulate matter (PM<SUB>2.5</SUB>) which is emitted into the atmosphere during the biogeochemical reaction in soils. The amount of ammonia emitted is dependent largely on the source ...

      Ammonia (NH₃) is a precursor of secondary-generated particulate matter (PM<SUB>2.5</SUB>) which is emitted into the atmosphere during the biogeochemical reaction in soils. The amount of ammonia emitted is dependent largely on the source of the nitrogen fertilizer and the application rate. To investigate ammonia emission factor from complex fertilizer (N-P₂O<SUB>5</SUB>-K₂O=12-7-9) application in apple cultivated soil this study was conducted at a farmers field, Anseong city. Four levels (0, 50, 100 and 200 kg N ha<SUP>-1</SUP>) of complex fertilizer were applied to the soil (Sandy loam soil). To determine cumulative ammonia emission during the season (early March to end of Octorber in 2021 year) we trapped and measured the gas concentration from the soil using dynamic chamber method. The sampling was done at least twice per week and immediately analyzed NH₃ concentration using nesslerization method. Result showed that the the application of fertilizer produced NH₃ emission and showed the peak within 7 days after application followed by a decreasing trend. Cumulative NH₃ emissions in each treatment were 1.7 (N 0), 2.6 (N 50), 3.0 (N 100), and 3.6 (N 200) kg NH₃ ha<SUP>-1</SUP> season<SUP>-1</SUP>. Applying the each cumulative amounts of NH₃ emission in the treatment, an ammonia emission factor from complex fertilizer was 9.0 kg per tons (Y=0.009x+1.94, R²=0.923*) (Fig. 1). The result of this study is therefore suggested to be used as basic data to update emission factors having evaluated the characteristics of ammonia emission based on nutrient input during the apple cultivation period.

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