title: [Impacts of elevated ozone concentration on N2O emission from arid farmland].
abstract: To investigate the impact of elevated surface ozone (O3) concentration on nitrous oxide (N2O) emission from arid farmland, field experiments were carried out during winter-wheat and soybean growing seasons under the condition of simulating O3 concentrations, including free air (CK), 100 nL x L(-1) O3 concentration (T1), and 150 nL x L(-1) O3 concentration (T2). N2O emission fluxes were measured by static dark chamber-gas chromatograph method. The results showed that the accumulative amount of N2O (AAN) were decreased by 37.8% (P = 0.000 ) and 8.8% (P = 0.903 ) under T1 and T2 treatments, respectively, in the turning-green stage of winter wheat. In the elongation-booting stage, ANN were decreased by 15.0% (P = 0.217) and 39.1% (P = 0.000) under T1 and T2 treatments, respectively. ANN were decreased by 18.9% (P = 0.138) and 25.6% (P = 0.000) under T1 and T2 treatments, respectively, during the whole winter-wheat growing season. No significant impact of elevated O3 concentration on N2O emission from soil-soybean system was found due to the less rainfall during the soybean growing season, drought had a stronger stress on soybean than O3 concentration. The results of this study suggested that elevated O3 concentration could reduce N2O emission from arid farmland.
authors.forename: Yang-Zhou
authors.initials: YZ
authors.lastname: Wu
authors.forename: Zheng-Hua
authors.initials: ZH
authors.lastname: Hu
authors.forename: Cen-Zi
authors.initials: CZ
authors.lastname: Li
authors.forename: Shu-Tao
authors.initials: ST
authors.lastname: Chen
authors.forename: Yan
authors.initials: Y
authors.lastname: Xie
authors.forename: Qi-Tao
authors.initials: QT
authors.lastname: Xiao
mesh_terms: D000383:Agriculture; D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring; D009609:Nitrous Oxide / Q000032:analysis*; D010126:Ozone / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D013025:Glycine max; D014908:Triticum
chemical_list: D000393:Air Pollutants; D012987:Soil; D010126:Ozone; D009609:Nitrous Oxide