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根据1996～1999年四个稻季的观测资料,分析了成都平原单季稻甲烷排放的季节变化和年际变化特征。结果表明:在水稻生医季节甲烷排放通量变化很大,在分蘖期和成熟期一般会出现峰值。年际间的通量变化也很大,其年均排放通量的变化范围在2.35～33.95％mgm-2h-1之间。4年的平均排放通量为12mgm-2h-1,与四川乐山的7年平均值30mgm-2h-1相比,存在着明显的地区差异。同时分析讨论了温度、施肥、水稻品种、土壤氧化还原电位（Eh）以及稻田水位等诸多因素对稻田甲烷排放的影响。结果表明:在成都平原水稍生长季节的平均气温对CH4的平均排放通量影响不大;而气温对CH4排放的日变化有相对重要的影响,但气温对甲烷排放日变化的影响与水稻植物体的生长阶段有关;发现了水稻植物体（根、茎、叶）重量对CH4排放的重要作用。讨论了合理使用肥料和施肥量,控制水位和Eh值对稻田CH4的减排作用,提出优化组合诸影响因子,以充分发挥其减排潜力。
Based on the observation data of four rice seasons from 1996 to 1999, the seasonal variations and interannual variability of methane emissions from single-crop paddy in Chengdu Plain were analyzed. The results showed that methane flux changed greatly during the season of rice growth and peaked at the tillering and maturity stages. The annual flux also varies greatly, with annual mean flux varying between 2.35 and 33.95% mgm-2h-1. The average annual discharge flux over the four years was 12 mgm-2 h-1, which was significantly different from the 7-year average of 30 mgm-2 h-1 in Leshan, Sichuan province. At the same time, the effects of temperature, fertilization, rice variety, soil redox potential (Eh) and paddy water level on methane emissions from paddy fields were analyzed. The results showed that the mean temperature slightly affected the average flux of CH4 in the slightly growing season in Chengdu Plain, while the temperature had a relatively significant effect on the diurnal variation of CH4 emissions. However, the effect of temperature on the diurnal variation of methane emissions was similar to that of rice plants Body of the growth stage; found in rice plant body (root, stem, leaf) weight on CH4 emissions important role. Discusses the rational use of fertilizers and fertilizer, control of water level and Eh value of rice CH4 emission reduction role, put forward the combination of all the factors that affect the optimal, to give full play to their potential emission reduction.