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1993～1994年在中国科学院红壤生态试验站通过田间试验研究了丘陵区稻田N2O排放的特点结果表明稻田N2O排放主要集中在水分落干期间，淹水状态下几乎没有N2O排放。由于早稻稻草还田，晚稻稻田N2O排放量即使在水分落干期间也不高。稻田N2O排放员随地形降低而逐渐增加，1993～1994年两年中被底、坡腰和坡顶稻田水稻生长期平均N2O-N排放通量分别为10．90、5．60和2．11μg／（m2·h）。
The characteristics of N2O emission from paddy fields in hilly area were studied in the red soil ecological experiment station of Chinese Academy of Sciences from 1993 to 1994. The results showed that the N2O emission of paddy fields was mainly concentrated during the period of water loss, with almost no N2O emission under flooded conditions. N2O emissions from rice paddy fields in late rice are not high even during periods when water is dry due to early rice straw returning. The N2O emission of paddy fields increased gradually with the decrease of the terrain. The average N2O-N fluxes of rice growing at bottom, slope and top paddy in the two years from 1993 to 1994 were 10.90, 5.60 and 2.11μg / (M2 · h).