Response to Ammonia Emission Flux to Different pH Conditions under Biochar and Liquid Fertilizer Application

Min-Suk Kim, Hyun-Gi Min, Namin Koo and Jeong-Gyu Kim
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Min-Suk Kim: OJeong Resilience Institute, Korea University, Seoul 02841, Korea
Hyun-Gi Min: Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Korea
Namin Koo: Department of Forest Conservation, National Institute of Forest Science, Seoul 02455, Korea
Jeong-Gyu Kim: Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Korea

Agriculture, 2021, vol. 11, issue 2, 1-8

Abstract: For the ammonia generated in Korea, the contribution rate of livestock manure is high, and a large amount of ammonia (NH 3 ) is emitted into the atmosphere during the soil application process. Volatilization of NH 3 is affected by soil characteristics as well as manure characteristics, but the current inventory does not sufficiently reflect this. This study was conducted to confirm the change of the NH 3 emitted from liquid fertilizer (LF) due to soil pH and to evaluate the impacts of biochar (BC) on the suppression of NH 3 volatilization. Estimating the NH 3 emission flux using the chamber for 24 soils after LF treatment, it showed a tendency to increase exponentially as the pH in soil increased from 4 to 7. In addition, the parallel treatment of BC and LF increased the soil pH, thereby increasing the NH 3 emission flux. The rise of soil pH due to LF treatment is a temporary phenomenon that appears in the early stage, but since NH 3 volatilization is also highest at the beginning of LF application, the effect of soil characteristics on emission factor and its inventory should be considered when calculating the amount of NH 3 emissions. Therefore, follow-up studies such as subdividing and enhancing the NH 3 emission factor by soil characteristics and developing a reduction coefficient to certify the amount of emission reduction are needed.

Keywords: ammonia; emission flux; inventory; spent coffee ground biochar (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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