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- W4383373668 abstract "Abstract Purpose: Simulations of N deposition and precipitation via N and water addition experiments are important for studying how soil nitrous oxide (N 2 O) fluxes in temperate steppes will respond to future global climate change. Methods: In June 2017, we conducted an N and water application experiment on a temperate steppe in Inner Mongolia, Northeast China, to investigate the impacts of N and water additions upon N 2 O fluxes and how the soil physicochemical properties, vegetation, and microbes regulate this process regulate this process. In this study, we collected samples and measured the variations in soil N 2 O fluxes and physicochemical and biological properties under N, and water additions in July and August of 2019 and 2020. Results: The results indicated that N addition significantly decreased soil pH, increased the NH 4 + -N and DON contents, decreased the MBC content, and promoted PER activity, while water addition significantly increased soil pH, SWC, and the root-shoot ratio. Soil N 2 O fluxes were significantly increased by a factor of 2.2 under the 2020 N treatment alone. A structural equation model (SEM) showed that the soil N 2 O fluxes in response to N and water additions were mainly driven by DON in 2019, and pH was the key factor that affected the N 2 O fluxes in 2020. Conclusions: Our findings suggested that the leading factors differed between the two years due to the differences in BGB caused by different distribution of precipitation during the growing season." @default.
- W4383373668 created "2023-07-07" @default.
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- W4383373668 date "2023-07-06" @default.
- W4383373668 modified "2023-09-23" @default.
- W4383373668 title "Belowground biomass changed the regulatory factors of soil N2O fluxes under N and water additions in a temperate steppe of Inner Mongolia" @default.
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- W4383373668 doi "https://doi.org/10.21203/rs.3.rs-3046880/v1" @default.
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