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- W3028255628 abstract "Abstract Soil amendments (e.g., hydrochar) have recently gained increasing research interest because of their potential application in agricultural soils to reduce nutrient loss to the environment. In order to improve the surface properties of hydrochar, we herein used the microbial-aging approach to produce microbially-aged hydrochar (M-SHC), which was applied in rice paddy soil columns to investigate nitrogen transformation processes and gaseous nitrogen losses by NH3 volatilization. The aim of this research was mainly to explore and understand the mechanisms by which sawdust hydrochar (SHC), M-SHC, and water-washed hydrochar (W-SHC) influence NH3 volatilization in rice paddy fields. Compared with the control, M-SHC treatment considerably reduced both cumulative NH3 and yield-scale NH3 volatilization by 11.52% and 24.40% ( p 0.05 ), respectively. This reduction could be attributed to a decrease in NH4+–N concentrations and an alteration of floodwater pH, following the application of M-SHC. The results showed that changes in floodwater pH could considerably affect the NH3 volatilization rate. When floodwater was slightly alkaline (pH > 7.25), even a minor alteration of pH following the application of hydrochar could increase NH3 volatilization rapidly. The application of hydrochar substantially inhibited the soil urease activity and increased the soil amoA gene abundance, which, in turn, decreased the floodwater NH4+–N concentrations. These results offer strong theoretical support for the application of hydrochar in agricultural systems to decrease NH3 volatilization in rice paddy fields." @default.
- W3028255628 created "2020-05-29" @default.
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- W3028255628 date "2020-09-01" @default.
- W3028255628 modified "2023-10-18" @default.
- W3028255628 title "Hydrochar reduced NH3 volatilization from rice paddy soil: Microbial-aging rather than water-washing is recommended before application" @default.
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- W3028255628 doi "https://doi.org/10.1016/j.jclepro.2020.122233" @default.
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