中文摘要：

采用静态箱．气相色谱法，研究了控释肥料对四川丘陵地区覆膜节水高产栽培稻田N2O排放的影响．结果表明：稻田施用尿素及控释肥料后水稻生长期N2O排放总量分别为（38．2±4．4）和（21．5±5．2）mgN·m^-2；施用尿素处理N20排放系数为0．25％，施用控释肥料处理N20排放系数为0．14％，减少了43．6％（P〈0．05），其中烤田前减少了49．6％（P〈0．05）；控释肥料可抑制施肥引起的N2O排放峰值，降幅达52．6％；控释肥料对水稻不同生长季节土壤微生物生物量氮、NH4^＋-N含量和水稻产量均无显著影响；N2O排放与5em土壤温度、土壤Eh值无显著相关性．

英文摘要：

A field experiment was conducted to assess the effect of controlled release fertilizer on N2O emission in paddy field under plastic film mulching cultivation （PM） with water-saving irriga- tion. Results showed that in the rice growing season, cumulative N2O emissions from the plots applied with urea （PM＋U） and with controlled release fertilizer （PM＋CRF） were （38.2±4.4） and （21.5±5.2） mg N . m^-2, respectively. The N2O emission factors were 0.25% and 0.14% in the treatments PM＋U and PM＋CRF, respectively. The controlled release fertilizer decreased the total N2O emission by 43.6% compared with urea, of which 49.6% was reduced before the drying period. It also reduced the peak of N2O emission by 52.6%. However, it did not affect soil microbial biomass N and soil NH4 ^＋-N content at any rice growing stage, and grain yield either. No significant correlation was observed between N2O flux and soil Eh or soil temperature at the depth of 5 era.