中文摘要：

通过田间试验,采用静态箱法研究相同施氮量条件下,施用尿素、控释肥及尿素与控释肥配施（尿素与控释肥以3：7配合施用）对稻田N2O排放的影响.结果表明：与单施尿素处理相比,配施处理和控释肥处理水稻生长期N2O排放量分别减少40.4%和59.6%（P〈0.05）,其中烤田期分别减少65.1%和83.9%;与配施处理相比,施用控释肥处理N2O排放量略微减少（P〉0.05）,其中烤田期减少53.9%.施用控释肥可增加水稻产量,与尿素处理相比,施用控释肥和配施处理水稻产量分别增加7.8%和9.8%（P〉0.05）.施用控释肥使土壤无机氮峰值出现时间延后,烤田期N2O排放减少.水稻生长期N2O排放通量与土壤氧化还原电位（Eh）和土壤温度均无明显相关性（P〉0.05）.

英文摘要：

By the method of static chamber,a field experiment was conducted to study the effects of applying controlled-release fertilizer（CRF） and its combination with urea on the N2O emission during rice growth period.Four treatments,i.e.,no fertilization（CK）,urea（U）,urea and CRF with a ratio of 3：7（U＋C）,and CRF（C） were installed,and the N application rate in treatments U,U＋C,and C was the same.Compared with treatment U,treatments U＋C and C decreased the N2O emission during rice growth season by 40.4% and 59.6%,and decreased the emission at midseason aeration stage by 65.1% and 83.9%,respectively（P0.05）.Compared with that in treatment C,the N2O emission in treatment U＋C had a slight decrease,and decreased by 53.9% at midseason aeration stage.Applying CRF increased rice yield,and the increment in treatments C and U＋C was 7.8% and 9.8%,respectively,as compared to treatment U.Applying CRF delayed the peak time of soil inorganic nitrogen concentration,resulting in the reduction of N2O emission at midseason aeration stage.During rice growth season,no significant correlation was observed between N2O flux and soil Eh or soil temperature.