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- W2801824871 abstract "Accounting for nitrogen (N) release from organic amendments (OA) can reduce the use of synthetic N-fertiliser, sustain crop production, and potentially reduce soil borne greenhouse gases (GHG) emissions. However, it is difficult to assess the GHG mitigation potential for OA as a substitute of N-fertiliser over the long term due to only part of the organic N added to soil is being released in the first year after application. High-resolution nitrous oxide (N2O) and carbon dioxide (CO2) emissions monitored from a horticultural crop rotation over 2.5 years from conventional urea application rates were compared to treatments receiving an annual application of raw and composted chicken manure combined with conventional and reduced N-fertiliser rates. The repeated application of composted manure did not increase annual N2O emissions while the application of raw manure resulted in N2O emissions up to 35.2 times higher than the zero N fertiliser treatment and up to 4.7 times higher than conventional N-fertiliser rate due to an increase in C and N availability following the repeated application of raw OA. The main factor driving N2O emissions was the incorporation of organic material accompanied by high soil moisture while the application of synthetic N-fertiliser induced only short-term N2O emission pulse. The average annual N2O emission factor calculated accounting for the total N applied including OA was equal to 0.27 ± 0.17%, 3.7 times lower than the IPCC default value. Accounting for the estimated N release from OA only enabled a more realistic N2O emission factor to be defined for organically amended field that was equal to 0.48 ± 0.3%. This study demonstrated that accounting for the N released from repeated application of composted rather than raw manure can be a viable pathway to reduce N2O emissions and maintain soil fertility." @default.
- W2801824871 created "2018-05-17" @default.
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- W2801824871 date "2018-10-01" @default.
- W2801824871 modified "2023-10-12" @default.
- W2801824871 title "N2O and CO2 emissions following repeated application of organic and mineral N fertiliser from a vegetable crop rotation" @default.
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- W2801824871 doi "https://doi.org/10.1016/j.scitotenv.2018.05.046" @default.
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