Zhang Yi, Lü Shi-Hua, Ma Jing, Xu Hua, Yuan Jiang, Dong Yu-Jiao
Ying Yong Sheng Tai Xue Bao. 2014 Mar;25(3):769-75.
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 irrigation. 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 x 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 NH(4+)-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 cm.
进行了一项田间试验，以评估控释肥料对覆膜节水灌溉稻田N2O排放的影响。结果表明，在水稻生长季，施用尿素的小区（PM+U）和施用控释肥料的小区（PM+CRF）的N2O累积排放量分别为（38.2±4.4）和（21.5±5.2）mg N·m-2。PM+U和PM+CRF处理的N2O排放因子分别为0.25%和0.14%。与尿素相比，控释肥料使N2O总排放量降低了43.6%，其中在晒田期前降低了49.6%。它还使N2O排放峰值降低了52.6%。然而，在水稻生长的任何阶段，它都不影响土壤微生物生物量氮和土壤铵态氮含量，也不影响粮食产量。在5 cm深度处，未观察到N2O通量与土壤氧化还原电位或土壤温度之间存在显著相关性。
