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Open AccessArticle

Mitigation of CO2 and N2O Emission from Cabbage Fields in Korea by Optimizing Tillage Depth and N-Fertilizer Level: DNDC Model Simulation under RCP 8.5 Scenario

Department of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Korea
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Sustainability 2019, 11(21), 6158; https://doi.org/10.3390/su11216158
Received: 19 September 2019 / Revised: 23 October 2019 / Accepted: 31 October 2019 / Published: 4 November 2019
(This article belongs to the Special Issue Global Warming, Environmental Governance and Sustainability Issues)
In this study, we applied the Denitrification and Decomposition model to predict the greenhouse gas (GHGs; CO2 and N2O) emissions and cabbage yields from 8072 cabbage fields in Korea in the 2020s and 2090s. Model outputs were evaluated as a function of tillage depth (T1, T2, and T3 for 10, 20, and 30 cm) and fertilizer level (F1, F2, and F3 for 100, 200, and 400 kg N ha−1) under the Representative Concentration Pathways 8.5 climate change scenario. For both time periods, CO2 emissions increased with tillage depth, and N2O emissions were predominantly influenced by the level of applied N-fertilizers. Both cabbage yields and GHGs fluxes were highest when the T3F3 farming practice was applied. Under current conventional farming practices (T1F3), cabbage yield was projected at 64.5 t ha−1 in the 2020s, which was close in magnitude to the predicted cabbage demand. In the 2090s, the predicted cabbage supply by the same practice far exceeded the projected demand at 28.9 t ha−1. Cabbage supply and demand were balanced and GHGs emissions reduced by 19.6% in the 2090s when 94% of the total cabbage farms adopted low carbon-farming practices (e.g., reducing fertilizer level). Our results demonstrate the large potential for Korean cabbage farms to significantly contribute towards the mitigation of GHGs emissions through the adoption of low-carbon farming practices. However, in order to incentivize the shift towards sustainable farming, we advise that lower yield and potential economic losses in farmlands from adopting low-carbon practices should be appropriately compensated by institutional policy. View Full-Text
Keywords: climate change; greenhouse gas; cabbage farming; DNDC model climate change; greenhouse gas; cabbage farming; DNDC model
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MDPI and ACS Style

Hwang, W.; Park, M.; Cho, K.; Kim, J.-G.; Hyun, S. Mitigation of CO2 and N2O Emission from Cabbage Fields in Korea by Optimizing Tillage Depth and N-Fertilizer Level: DNDC Model Simulation under RCP 8.5 Scenario. Sustainability 2019, 11, 6158. https://doi.org/10.3390/su11216158

AMA Style

Hwang W, Park M, Cho K, Kim J-G, Hyun S. Mitigation of CO2 and N2O Emission from Cabbage Fields in Korea by Optimizing Tillage Depth and N-Fertilizer Level: DNDC Model Simulation under RCP 8.5 Scenario. Sustainability. 2019; 11(21):6158. https://doi.org/10.3390/su11216158

Chicago/Turabian Style

Hwang, Wonjae; Park, Minseok; Cho, Kijong; Kim, Jeong-Gyu; Hyun, Seunghun. 2019. "Mitigation of CO2 and N2O Emission from Cabbage Fields in Korea by Optimizing Tillage Depth and N-Fertilizer Level: DNDC Model Simulation under RCP 8.5 Scenario" Sustainability 11, no. 21: 6158. https://doi.org/10.3390/su11216158

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