*2.1.2.2 Soil temperature*

Effects of soil temperature on N2O emissions were more complex than that of soil moisture. For example, warming increased soil N2O emissions from boreal peatland [27] and alpine meadow [28]. Soil N2O emissions had an exponential increased relationship with incubation temperatures [29]. A significant positive correlation was presented in N2O emissions and soil temperature from different soil types (paddy, orchard, forest, and mountain) [30]. Although warming did not affect soil N2O emissions from northern peatlands, it suppressed N2O emissions under N addition conditions [31]. By contrast, the effects of warming on soil N2O emissions from alpine meadow soil were not observed [32]. Consistently, no significant increase of soil N2O emissions was found with increasing incubation temperatures [33]. Previous study reported that soil moisture and temperature can explain 86% of soil N2O emissions [34].
