Effects of mild alternate wetting and drying irrigation and rice straw application on N₂O emissions in rice cultivation

Abstract 2 O) emissions, needs to be further clarified to ensure that agronomic practices save water, conserve soil, and reduce GHG emissions. Therefore, we explored the effects of mild AWD irrigation combined with on-site rice straw recycling on N2 O emissions and rice yield through rice pot experiments. This experiment included 2 irrigation methods (continuous flooding (CF) irrigation and mild AWD irrigation), 2 nitrogen (N) application levels (0 and 225 kg N ha- 1 - 1 15 N-urea and 15 N-S were added to the soil. The results showed that N2 O emissions were primarily affected by urea application and irrigation methods, with urea application being most important. Compared with CF irrigation, mild AWD irrigation increased cumulative N2 O emissions, with an average increase of 28.8 %. In addition, adding rice straw to mild AWD irrigation further stimulated N2 O emissions by 18.1 %. Under the condition of urea application, compared with CF irrigation, mild AWD irrigation increased the yield-scaled N2 O emissions by 17.9 %, and the addition of rice straw further promoted the yield-scaled N2 O emissions under mild AWD irrigation by 17.4 % but reduced the global warming potential (GWP) (methane (CH4) + 2 O) by 62.9 %. Under the condition of urea application, compared with CF irrigation, mild AWD irrigation reduced the uptake of soil-derived N and aboveground biomass of rice but did not reduce rice yield. Therefore, mild AWD irrigation combined with rice straw return may be a promising agronomic method to maintain rice yield, reduce GHGs, and protect or improve soil fertility.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Effects of mild alternate wetting and drying irrigation and rice straw application on N₂O emissions in rice cultivation ; volume:8 ; number:2 ; year:2022 ; pages:645-654 ; extent:10 ; Soil ; 8, Heft 2 (2022), 645-654 (gesamt 10)

Contributors, Places and Time

• Creator: Wu, Kaikuo ; Li, Wentao ; Wei, Zhanbo ; Dong, Zhi ; Meng, Yue ; Lv, Na ; Zhang, Lili

Further information

• DOI: 10.5194/soil-8-645-2022
• URN: urn:nbn:de:101:1-2022101305295778721250
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:37 AM CEST