Effects of fertilizer application schemes and soil environmental factors on nitrous oxide emission fluxes in a rice-wheat cropping system, east China.

Compared with the CF treatment, the annual N 2 O emissions of the OF, SRF, OF+UI, CF+SI and CF+DI treatments showed highly significant reductions of 12.87%, 16.94%, 21.20%, 18.05% and 22.15% during the wheat cropping season, respectively ( P <0.05, Table 1 ).

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In the rice cropping season, the annual N 2 O emissions of the SRF treatment were significantly reduced by 5.55%, and the reduction of OF+UI was extremely significant at 7.93%.

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