Nitrogen migration and transformation in a saline-alkali paddy ecosystem with application of different nitrogen fertilizers
Article
Wang, X., Wang, M., Chen, L., Shutes, B., Yan, B., Zhang, F., Lyu, J. and Zhu, H. 2023. Nitrogen migration and transformation in a saline-alkali paddy ecosystem with application of different nitrogen fertilizers. Environmental Science and Pollution Research. https://doi.org/10.1007/s11356-023-25984-9
Type | Article |
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Title | Nitrogen migration and transformation in a saline-alkali paddy ecosystem with application of different nitrogen fertilizers |
Authors | Wang, X., Wang, M., Chen, L., Shutes, B., Yan, B., Zhang, F., Lyu, J. and Zhu, H. |
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 -N) of surface water and/or soil on ammonia (NH ) volatilization and nitrous oxide (N O) emission. Compared with urea (U), the application of urea with urease-nitrification inhibitors (UI) can reduce the potential risk of NH -N and nitrate-N (NO -N) loss via runoff, and significantly (p < 0.05) reduce the N O emission. However, the expected effectiveness of UI on NH 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 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 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 | Structural equation model, Saline-alkali soil, Nitrogen transformation, Paddy fields, Runoff loss |
Sustainable Development Goals | 6 Clean water and sanitation |
13 Climate action | |
14 Life below water | |
15 Life on land | |
Middlesex University Theme | Sustainability |
Publisher | Springer |
Journal | Environmental Science and Pollution Research |
ISSN | 0944-1344 |
Electronic | 1614-7499 |
Publication dates | |
Online | 22 Feb 2023 |
Publication process dates | |
Deposited | 09 Mar 2023 |
Submitted | 23 Oct 2022 |
Accepted | 13 Feb 2023 |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11356-023-25984-9 |
Language | English |
https://repository.mdx.ac.uk/item/8q4xz
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