摘要: This short review deals with soils as an important source of the greenhouse gas N 2 O. The production and consumption of N 2 O in soils mainly involve biotic processes: the anaerobic process of denitrification and the aerobic process of nitrification. The factors that significantly influence agricultural N 2 O emissions mainly concern the agricultural practices (N application rate, crop type, fertilizer type) and soil conditions (soil moisture, soil organic C content, soil pH and texture). Large variability of N 2 O fluxes is known to occur both at different spatial and temporal scales. Currently new techniques could help to improve the capture of the spatial variability. Continuous measurement systems with automatic chambers could also help to capture temporal variability and consequently to improve quantification of N 2 O emissions by soils. Some attempts for mitigating soil N 2 O emissions, either by modifying agricultural …
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