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[Effects of precipitation and soil moisture on N2O emissions from upland soils in Guizhou].

Wenbin Xu, Guangshen Liu, Wei‐Bing Liu

Abstract

Soils of corn-rape seed rotation, soybean-winter wheat rotation and fallow land in Guizhou were representatively selected to study effects of precipitation and soil moisture on N2O emissions. Furthermore, DNDC model was used to assess the potential effects of variations in precipitation in future on N2O emissions from above lands. The results indicated that N2O emission pulses were obviously driven by rainfall and N2O fluxes were correlated positively with precipitation and soil moisture. The results from DNDC modeling showed that N2O fluxes from soils in summer and autumn would be correlated positively with precipitation, but N2O fluxes in winter and spring would slightly decrease with great change of precipitation.

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Key concepts: Environmental science, Precipitation, Soil water, Agronomy, Water content, Moisture, Soil science, Chemistry