Enhanced N2O Emissions from Winter Wheat Field Induced by Winter Irrigation in the North China Plain

Winter irrigation is important for wheat in meeting crop water requirements spring, but it alters soil moisture dynamics and affects N2O production emission. To assess the effects of winter on emissions a field, an situ experiment was conducted from 1 October 2019 to March 2020 with one control treatment (CK) five levels quantities (irrigated 60%, 70%, 80%, 90%, 100% holding capacity, namely WHC60–WHC100, respectively). The results showed that had impact emission peaks were not investigated immediately after irrigation, at two days after, which increased by 4.3–17.0 μg·m−2·h−1 under WHC60–100 treatments compared CK. cumulative 1.1–3.9 times higher than CK, indicating has increase trend content regulated irrigations. Pearson correlation analysis between flux temperature moderate coefficients about 0.65. While poor during investigate season ranging 0.08 0.25. Future studies should focus general responses environmental factors support data several seasons.