农田水管理下的稻田甲烷排放研究进展

Variations of Methane Emission of Paddy Fields under Farmland Water Management

从土壤水分状况与稻田甲烷排放的关系出发,对不同水管理措施,例如排水、烤田等对稻田甲烷排放的影响,以及不同水稻灌溉模式引起的甲烷排放变化等做一简要评述,特别指出节水灌溉模式下稻田甲烷排放的相关研究还很不足,提出今后应加强各种水稻节水灌溉模式对稻田CH4排放的调节效应、有针对性地开展关键水管理措施对稻田CH4排放的联合影响及机理、不同灌溉模式下稻田温室气体综合排放等方面的研究。

Based on the relationship between soil moisture status and methane emission of paddy field, a preliminary discussion was made on the variations of methane emission of paddy fields influenced by different water management measures, such as drainage or soil aeration, and different rice irrigation models. Combining with own research work, it is pointed out that related research on methane emission of paddy field under different irrigation models, especially under varied water-saving irrigation models, shall be strengthened. Further, the detailed directions for future research work in this field are proposed, such as, regulation effects of varied rice water-saving irrigation models on methane emission of paddy field, joint effects and mechanisms of key water management measure on methane emission of paddy field, and comprehensive effects of green gases emission of paddy field under different rice water-saving irrigation models.