Rice (Oryza sativa L.) intermittent irrigation is a potential strategy to mitigate methane (CH₄) and nitrous oxide (N₂O) emissions, but the effects of dry-wetting intervals on soil electrochemical changes and plant characteristics should be considered. This study was conducted in a greenhouse evaluating CH₄ and N₂O fluxes in rice under five different irrigation management practices (continuous irrigation (CI), intermittent irrigation with flooding resumption in saturated soil condition (SSI) and soil moisture at field capacity (FCI), saturated soil and irrigation resumption with soil moisture bellow field capacity (FCS), and soil at field capacity (FCD)) and its relation to plant development and global warming potential (GWP). Soil electrochemical conditions and CH₄ and N₂O emissions were expressively affected by irrigation management. The CI system presented the greatest CH₄ flux (20.14 g m⁻²) and GWP (462.7 g m⁻² eq. CO₂), whereas intermittent irrigation expressively reduced CH₄ emissions. Overall, the N₂O flux was low (bellow 20 μg m^-2 h⁻¹) even with N application, with greater emissions occurring at the FCD treatment at the beginning of the rice season. Soil moisture at field capacity had no CH₄ flux but presented greater GWP (271 g m⁻² eq. CO₂) than intermittent irrigation systems due to N₂O flux while compromising rice plant development. The best soil moisture condition to initiate a flooding cycle during intermittent irrigation is at saturated soil conditions.

水稻（Oryza sativa L.）间歇灌溉是减少甲烷（CH ₄）和一氧化二氮（N ₂ O）排放的潜在策略，但应考虑干湿间隔对土壤电化学变化和植物特性的影响。本研究在评估 CH ₄和 N ₂的温室中进行五种不同灌溉管理措施下水稻中的 O 通量（连续灌溉（CI），在饱和土壤条件（SSI）和田间持水量土壤水分（FCI）下恢复洪水的间歇灌溉，饱和土壤和土壤水分低于田间持水量的灌溉恢复） (FCS)、田间持水量 (FCD)) 及其与植物发育和全球变暖潜能值 (GWP) 的关系。土壤电化学条件和 CH ₄和 N ₂ O 排放受到灌溉管理的显着影响。CI 系统表现出最大的 CH ₄通量 (20.14 gm ^-2 ) 和 GWP (462.7 gm ^-2 eq. CO ₂ )，而间歇灌溉显着降低了 CH₄排放。总体而言，即使施氮，N ₂ O 通量也很低（低于 20 μg m ^{- 2} h ^-1），在稻季开始时 FCD 处理会产生更大的排放。田间持水量的土壤水分没有 CH ₄通量，但由于 N ₂ O 通量而比间断灌溉系统表现出更大的 GWP（271 gm ^-2 eq. CO ₂），同时影响水稻植物的发育。在间歇灌溉期间启动洪水循环的最佳土壤湿度条件是饱和土壤条件。