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Freeze-thaw event often occurs in regions at mid-high latitude and high altitude. This event can affect soil physical and biological properties, such as soil water status, aggregate stability, and microbial biomass and community structure. Under its effects, the bio-indicators of soil microbes including the kinds and quantities of some specific amino sugars may vary, and the process and intensity of soil nitrogen transformation may change, which can result in an increase in nitrous oxide (N2O) production and emission, making the soil as the major source of N2O emission. This paper summarizes the research progress on the aspects mentioned above, and suggests further research directions on the theoretical problems of soil N2O production and emission under the effects of freeze-thaw event. |
