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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2026.5
- 수록면
- 184 - 197 (14page)
이용수
초록· 키워드
Rice paddies are a major source of methane (CH₄) emissions, necessitating the development of novel mitigation strategies during cultivation. Surface water aeration (SWA) can increase oxygenation in flooded water, potentially reducing CH₄ emissions in paddy systems. However, its efficacy remains unclear. In this pot experiment, different levels of aeration - specifically, none (control, without air supply), low (air supply via a single line) and high (air supply via double lines) - were applied using an air supply device. These treatments were evaluated in the presence (OM) or absence (NOM) of rice straw as an organic amendment to investigate their effects on CH₄ emissions and rice productivity. Dissolved CH₄ and oxygen concentrations in surface water were periodically monitored to decipher the factors influencing CH₄ dynamics. Regardless of organic matter incorporation, SWA partially reduced CH₄ emissions, particularly during the initial period (ca. 3 - 4 weeks), resulting in 22 - 32% and 5 - 7% reductions compared to the control under NOM and OM treatments, respectively. However, SWA did not significantly reduce cumulative CH4 emissions over the entire cultivation period, likely due to enhanced organic matter decomposition stimulated by increased aeration. Interestingly, dissolved CH₄ concentrations were significantly reduced by aeration in both the OM and NOM treatments, which could be attributed to increased ebullition from the surface water. Furthermore, SWA deteriorated rice productivity. In conclusion, SWA showed negligible effects on overall CH₄ mitigation while reducing rice productivity. This study suggests that SWA is not a feasible strategy for CH₄ mitigation, highlighting the need for alternative approaches that can optimize oxygen levels within the soil profile without hindering plant growth.
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목차
- ABSTRACT
- Introduction
- Materials and Methods
- Results and Discussion
- Conclusions
- References
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