Korean Journal of Agricultural Science (Korean J. Agric. Sci.; KJOAS)
Indexed in KCI (Korea Citation Index), Open Access, Peer Reviewed.
pISSN 2466-2402
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Kang YG, Lee JH, Lee JY, Oh TK. Effects of application rate and pH of carbonized rice husk on the reduction of NH3 volatilization and soil quality. Korean Journal of Agricultural Science 50:273-281.
Korean Journal of Agricultural Science (Korean J. Agric. Sci.) 2023 June, Volume 50, Issue 2, pages 50:273-281. https://doi.org/10.7744/kjoas.20230018
Received on 13 January 2023, Revised on 20 March 2023, Accepted on 26 April 2023, Published on 30 June 2023.
Yun-Gu Kang, Jae-Han Lee, Jun-Yeong Lee, Taek-Keun Oh*
Department of Bio-Environmental Chemistry, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea
*Corresponding author: ok5382@cnu.ac.kr
Ammonia (NH3) emitted from the use of fertilizers during agricultural practice generates particulate matter and odors. The application of carbonized rice husk, an eco-friendly material, is one of the measures used to reduce NH3. The objective of this study was to evaluate the effect of the application rate and pH of carbonized rice husk on NH3 emissions and soil quality. An experiment to assess NH3 emissions was performed in a glasshouse using a static chamber method. The pH of the carbonized rice husk was divided into acidic, neutral, and basic groups, and the carbonized rice husk application rates were 1, 3, and 5% of the soil weight. NH3 emissions showed a sharp increase within three days after the inorganic fertilizer was applied. Subsequently, NH3 emissions decreased rapidly after basal fertilization compared to primary and secondary top-dressing. When carbonized rice husks were applied to soil, NH3 emissions decreased in all treatments, and neutral carbonized rice husk was the most effective in comparison with acidic and basic carbonized rice husk. The application rate of carbonized rice husk and NH3 emissions showed a negative correlation, and the lowest emissions were found in units with a 5% application rate. Also, there was no statistically significant difference between NH3 emissions according to the application rate of carbonized rice husk, and when carbonized rice husks were applied at a 5% rate, soil OM increased excessively. Therefore, it is recommended to apply only 1% neutral carbonized rice husk to most effectively reduce NH3 emissions in the soil.
ammonia (NH3), application rate, biochar, particulate matter, pH
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Yun-Gu Kang, https://orcid.org/0000-0001-5368-5910
Jae-Han Lee, https://orcid.org/0000-0001-5761-2006
Jun-Yeong Lee, https://orcid.org/0000-0001-7486-3405
Taek-Keun Oh, https://orcid.org/0000-0003-0215-0427
No potential conflict of interest relevant to this article was reported.