| Title: | Nitrogen migration and transformation in a saline-alkali paddy ecosystem with application of different nitrogen fertilizers |
| Author(s): | Wang X; Wang M; Chen L; Shutes B; Yan B; Zhang F; Lyu J; Zhu H; |
| Address: | "Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China. Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China. Da'an Sodic Land Experiment Station, Da'an, Jilin, 131300, China. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China. Department of Natural Sciences, Middlesex University, Hendon, London, NW4 4BT, UK. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China. zhuhui@iga.ac.cn. Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Changchun, 130102, China. zhuhui@iga.ac.cn" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-023-25984-9 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "With the increasing transformation of saline-alkali land into paddy, the nitrogen (N) loss in saline-alkali paddy fields becomes an urgent agricultural-environmental problem. However, N migration and transformation following the application of different N fertilizers in saline-alkali paddy fields remains unclear. In this study, four types of N fertilizers were tested to explore the N migration and transformation among water-soil-gas-plant media in saline-alkali paddy ecosystems. Based on the structural equation models, N fertilizer types can change the effects of electrical conductivity (EC), pH, and ammonia-N (NH(4)(+)-N) of surface water and/or soil on ammonia (NH(3)) volatilization and nitrous oxide (N(2)O) emission. Compared with urea (U), the application of urea with urease-nitrification inhibitors (UI) can reduce the potential risk of NH(4)(+)-N and nitrate-N (NO(3)(-)-N) loss via runoff, and significantly (p < 0.05) reduce the N(2)O emission. However, the expected effectiveness of UI on NH(3) volatilization control and total N (TN) uptake capacity of rice was not achieved. For organic-inorganic compound fertilizer (OCF) and carbon-based slow-release fertilizer (CSF), the average TN concentrations in surface water at panicle initiation fertilizer (PIF) stage were reduced by 45.97% and 38.63%, respectively, and the TN contents in aboveground crops were increased by 15.62% and 23.91%. The cumulative N(2)O emissions by the end of the entire rice-growing season were also decreased by 103.62% and 36.69%, respectively. Overall, both OCF and CSF are beneficial for controlling N(2)O emission and the potential risks of N loss via runoff caused by surface water discharge, and improving the TN uptake capacity of rice in saline-alkali paddy fields" |
| Keywords: | *Nitrogen/analysis Fertilizers/analysis Ammonia/analysis Ecosystem Alkalies *Oryza Agriculture Soil/chemistry Water Urea Nitrous Oxide/analysis Nitrogen transformation Paddy fields Runoff loss Saline-alkali soil Structural equation model; |
| Notes: | "MedlineWang, Xinyi Wang, Mingming Chen, Lei Shutes, Brian Yan, Baixing Zhang, Fuman Lyu, Jiao Zhu, Hui eng XDA28040102/Strategic Priority Research Program of the Chinese Academy of Sciences/ U21A2037/National Natural Science Foundation of China/ JCTD-2020-14/CAS Interdisciplinary Innovation Team Project/ Y2021068/Youth Innovation Promotion Association of the Chinese Academy of Sciences/ Germany 2023/02/23 Environ Sci Pollut Res Int. 2023 Apr; 30(18):51665-51678. doi: 10.1007/s11356-023-25984-9. Epub 2023 Feb 22" |
