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用密闭箱法研究了不同水旱轮作方式对稻田甲烷排放的影响。１９９４ 年—１９９５ 年连续两年观测结果表明， 稻田甲烷排放的季节变化与前作有关， 前作是水稻的稻田移栽后即有大量甲烷排放，而前作是旱作蔬菜的水稻生长前期几乎没有甲烷排放，且旱作时间越长甲烷排放越迟，峰值越小。稻田甲烷平均排放通量结果表明，单季早稻和单季晚稻显著低于常规连作，而水旱年间轮作只显著减少早稻甲烷排放，对晚稻甲烷排放影响较小。
The closed box method was used to study the effects of different rotation and precipitation patterns on methane emission from paddy fields. The results of two consecutive years from 1994 to 1995 show that the seasonal variation of methane emissions in paddy fields is related to the previous cropland. However, methane emissions from rice paddy fields before they were transplanted were substantial, whereas methane emissions from rice cropplants, which were formerly dry-crop vegetables, were scarcely methane-depleted , And the longer the dry time, the later the methane emission, the smaller the peak value. The average methane emission fluxes of paddy field showed that the single-season early-rice and single-season late-rice were significantly lower than those of conventional continuous cropping, while the rotation in dry-year irrigation only significantly reduced the methane emission of early rice and had little effect on the methane emission of late rice.