Water management alleviates greenhouse gas emissions by promoting carbon and nitrogen mineralization after Chinese milk vetch incorporation in a paddy soil
文献类型: 外文期刊
作者: Yang, Wei 1 ; Zhou, Lianning 2 ; Yao, Lai 1 ; Nie, Jiangwen 1 ; Jiang, Mengdie 1 ; Liu, Zhangyong 1 ; Liu, Huan 3 ; Zhu, Bo 1 ; Wang, Bin 4 ;
作者机构: 1.Yangtze Univ, Coll Agr, Engn Res Ctr Ecol & Agr Use Wetland, Minst Educ,Hubei Key Lab Waterlogging Disaster & A, Jingzhou 434025, Peoples R China
2.PKU HKUST Shenzhen HongKong lnst, Shenzhen 518054, Peoples R China
3.Aarhus Univ, Dept Agroecol, Blichers 20, DK-8830 Tjele, Denmark
4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, 12 Zhongguancun, South St, Beijing 100081, Peoples R China
关键词: Green manure substitution rate; Water management; C and N mineralization; CH4 and N2O
期刊名称:AGRICULTURE ECOSYSTEMS & ENVIRONMENT ( 影响因子:6.4; 五年影响因子:6.8 )
ISSN: 0167-8809
年卷期: 2025 年 381 卷
页码:
收录情况: SCI
摘要: Water regime and fertilization are key factors regulating rice yield and greenhouse gas (GHG) emissions in paddy soils. However, the knowledge of the interaction effect of irrigation regime and green manure application on GHG emissions is still lacking. This study was carried out across three incorporation rates (0 %, 25 %, 75 % of urea-N) of Chinese milk vetch ( Astragalus sinicus L., CMV), a widely used green manure, under three irrigation regimes (alternate wet and dry (AWD), flooding with 2 cm and 5 cm water depth, respectively). Results showed that water management, fertilizer regime and their interaction affected GHG emissions and grain yields significantly. CH4 emissions increased with water depth and CMV substitution ratio, while N2O emissions showed the opposite. The lowest global warming potential of CH4 and N2O was observed in 25 % CMV under AWD condition. Moreover, the 25 % CMV treatments had higher rice yields and lower GHGI under different water management. In the labile decomposition, the rates of C and N mineralization decreased with increasing water depth. Treatments with 25 % CMV had higher C and N mineralization rates. In summary, 25 % CMV substitution ratio has the highest potential to mitigate GHG emissions under AWD condition.
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