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• W3189099026 endingPage "115374" @default.
• W3189099026 startingPage "115374" @default.
• W3189099026 abstract "• Soil N 2 O and NO emissions have been rarely linked to crop NUE in annual wheat-rice rotations. • Manure N fertilizer substitution reduced N 2 O and NO emissions while enhanced crop NUE. • Both N 2 O and NO emissions were positively correlated with N surplus. • The combined emission factor of N fertilizer for N 2 O + NO was negatively related to crop NUE. Nitrogen (N) fertilizer has shown to affect soil nitrous oxide (N 2 O) and nitric oxide (NO) emissions that contribute to global warming and stratospheric ozone depletion. However, soil N 2 O and NO emissions with a linkage to crop N use efficiency (NUE) under different fertilization strategies in winter wheat-summer rice rotation systems remain yet to be further examined. Here, we carried out a two-year field study to assess the response of soil N 2 O and NO emissions as an interplay with NUE to different fertilization strategies in a typical winter wheat-summer rice rotation cropland of subtropical China. Three fertilizer treatments were established consisting of phosphorus (P) and potassium (K) fertilizer application (PK), NPK fertilizer application (NPK), and NPK fertilizer application with N partially replaced with manure (NPKM). Annual N 2 O, NO and N 2 O + NO emissions averaged 0.96, 0.24 and 1.19 kg N ha −1 yr −1 for the PK plots and 6.54, 1.48 and 8.03 kg N ha −1 yr −1 for the NPK plots, respectively. Relative to the NPK plots, partially replacing chemical N fertilizer with manure decreased annual N 2 O and NO emissions and their combined emissions by 13–15%, while it significantly enhanced crop NUE as compared to the NPK plots. Annual mean emission factors (EFs) of N fertilizer for N 2 O and NO were estimated to be 1.17% and 0.26% for the NPK plots, and 0.99% and 0.22% for the NPKM plots, respectively. Both N 2 O and NO emissions were positively correlated with N surplus, while yield-scaled N 2 O + NO emissions and the fertilizer N-induced combined EF for N 2 O + NO were negatively related to crop NUE. Together, our results highlight that improving crop NUE while reducing soil N surplus constitutes an effective strategy to mitigate soil gaseous N loss through N 2 O and NO in the wheat-rice rotation cropping systems." @default.
• W3189099026 created "2021-08-16" @default.
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• W3189099026 date "2021-12-01" @default.
• W3189099026 modified "2023-09-25" @default.
• W3189099026 title "Nitrogen use efficiency exhibits a trade-off relationship with soil N2O and NO emissions from wheat-rice rotations receiving manure substitution" @default.
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• W3189099026 doi "https://doi.org/10.1016/j.geoderma.2021.115374" @default.
• W3189099026 hasPublicationYear "2021" @default.
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