Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China
Nitrogen dioxide (NO<sub>2</sub>) impacts climate, air quality, soil nitrogen fixation, and crop production, yet its transboundary impacts remain unclear. This study combines 15 global datasets to assess nitrogen’s transboundary impacts on crop yields and soil health. We use machine lear...
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MDPI AG
2025-01-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/15/2/208 |
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| author | Jinhui Xie Peiheng Yu Xiangzheng Deng |
| author_facet | Jinhui Xie Peiheng Yu Xiangzheng Deng |
| author_sort | Jinhui Xie |
| collection | DOAJ |
| description | Nitrogen dioxide (NO<sub>2</sub>) impacts climate, air quality, soil nitrogen fixation, and crop production, yet its transboundary impacts remain unclear. This study combines 15 global datasets to assess nitrogen’s transboundary impacts on crop yields and soil health. We use machine learning to develop yield prediction models for major grain crops (maize, rice, soybean, and wheat) affected by NO<sub>2</sub>. Our findings indicate stable soil nitrogen fixation in China from 2015 to 2020, although overgrazing and deforestation may cause declines. Increasing soil total nitrogen content by 0.62–2.1 g/kg can reduce NO<sub>2</sub> by 10–30%. Our research indicates that the current agricultural environments for major grain crops (58.5–94.2%) have already exceeded the NO<sub>2</sub> concentration range that crops can tolerate, particularly in regions near northern urban clusters. This highlights the need for regional interventions, such as precision nitrogen fertilizer management, to enhance both soil nitrogen fixation and crop yields. Scenario analysis suggests that NO<sub>2</sub> control can boost maize and rice yields in a greener context, while increasing total nitrogen content improves wheat and soybean yields. This provides a solution for advancing sustainable agriculture by linking nitrogen cycle management with improved crop yields and environmental sustainability. |
| format | Article |
| id | doaj-art-1a04d4d62e9e4414b5941d831485e32c |
| institution | Kabale University |
| issn | 2077-0472 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Agriculture |
| spelling | doaj-art-1a04d4d62e9e4414b5941d831485e32c2025-01-24T13:16:08ZengMDPI AGAgriculture2077-04722025-01-0115220810.3390/agriculture15020208Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in ChinaJinhui Xie0Peiheng Yu1Xiangzheng Deng2Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, ChinaInstitute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaSino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, ChinaNitrogen dioxide (NO<sub>2</sub>) impacts climate, air quality, soil nitrogen fixation, and crop production, yet its transboundary impacts remain unclear. This study combines 15 global datasets to assess nitrogen’s transboundary impacts on crop yields and soil health. We use machine learning to develop yield prediction models for major grain crops (maize, rice, soybean, and wheat) affected by NO<sub>2</sub>. Our findings indicate stable soil nitrogen fixation in China from 2015 to 2020, although overgrazing and deforestation may cause declines. Increasing soil total nitrogen content by 0.62–2.1 g/kg can reduce NO<sub>2</sub> by 10–30%. Our research indicates that the current agricultural environments for major grain crops (58.5–94.2%) have already exceeded the NO<sub>2</sub> concentration range that crops can tolerate, particularly in regions near northern urban clusters. This highlights the need for regional interventions, such as precision nitrogen fertilizer management, to enhance both soil nitrogen fixation and crop yields. Scenario analysis suggests that NO<sub>2</sub> control can boost maize and rice yields in a greener context, while increasing total nitrogen content improves wheat and soybean yields. This provides a solution for advancing sustainable agriculture by linking nitrogen cycle management with improved crop yields and environmental sustainability.https://www.mdpi.com/2077-0472/15/2/208total nitrogen contentnitrogen cycletransboundary impactnitrogen fixationyield prediction model |
| spellingShingle | Jinhui Xie Peiheng Yu Xiangzheng Deng Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China Agriculture total nitrogen content nitrogen cycle transboundary impact nitrogen fixation yield prediction model |
| title | Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China |
| title_full | Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China |
| title_fullStr | Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China |
| title_full_unstemmed | Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China |
| title_short | Transboundary Impacts of NO<sub>2</sub> on Soil Nitrogen Fixation and Their Effects on Crop Yields in China |
| title_sort | transboundary impacts of no sub 2 sub on soil nitrogen fixation and their effects on crop yields in china |
| topic | total nitrogen content nitrogen cycle transboundary impact nitrogen fixation yield prediction model |
| url | https://www.mdpi.com/2077-0472/15/2/208 |
| work_keys_str_mv | AT jinhuixie transboundaryimpactsofnosub2subonsoilnitrogenfixationandtheireffectsoncropyieldsinchina AT peihengyu transboundaryimpactsofnosub2subonsoilnitrogenfixationandtheireffectsoncropyieldsinchina AT xiangzhengdeng transboundaryimpactsofnosub2subonsoilnitrogenfixationandtheireffectsoncropyieldsinchina |