Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input
Abstract Nitrogen (N) availability limits plant growth and soil carbon (C) sequestration in N‐limited ecosystems, however, plant and soil C feedback on the free‐living nitrogen fixation (FLNF) process is poorly understood. Moreover, whether this feedback is influenced by initial N availability in le...
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| Format: | Article |
| Language: | English |
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Wiley
2024-10-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL111238 |
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| author | Meichen Xu Linjie Fan Andi Li Qiyan Liu Guangcan Yu Senhao Wang Baixin Zhang Qing Ye Jiangming Mo Mianhai Zheng |
| author_facet | Meichen Xu Linjie Fan Andi Li Qiyan Liu Guangcan Yu Senhao Wang Baixin Zhang Qing Ye Jiangming Mo Mianhai Zheng |
| author_sort | Meichen Xu |
| collection | DOAJ |
| description | Abstract Nitrogen (N) availability limits plant growth and soil carbon (C) sequestration in N‐limited ecosystems, however, plant and soil C feedback on the free‐living nitrogen fixation (FLNF) process is poorly understood. Moreover, whether this feedback is influenced by initial N availability in leguminous and non‐leguminous forest soils has not been clarified. Here, we found that the addition of plant‐ and microbial‐derived C significantly enhanced soil nitrogenase activity (13∼28%) and that microbial‐derived C had a more positive impact. These positive effects were attributed to the direct C‐energy supply (0.49∼0.84) rather than variations in soil microbial activity (−0.01∼0.21) and substrate resources (−0.45∼0.27). Long‐term N addition did not inhibit FLNF. C addition promoted FLNF in soils of the two forests, but the response rate was higher in the leguminous forest soils. Our study reveals that increased soil C availability can drive FLNF in tropical forests, enhancing our understanding of the soil C‐N coupling mechanism. |
| format | Article |
| id | doaj-art-0abe67bc2e2d480bb7b0e1fb1eaaf173 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-0abe67bc2e2d480bb7b0e1fb1eaaf1732025-08-20T02:13:43ZengWileyGeophysical Research Letters0094-82761944-80072024-10-015120n/an/a10.1029/2024GL111238Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen InputMeichen Xu0Linjie Fan1Andi Li2Qiyan Liu3Guangcan Yu4Senhao Wang5Baixin Zhang6Qing Ye7Jiangming Mo8Mianhai Zheng9Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaSouth China Agricultural University Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaKey Laboratory of Vegetation Restoration and Management of Degraded Ecosystems Guangdong Provincial Key Laboratory of Applied Botany South China Botanical Garden Chinese Academy of Sciences Guangzhou ChinaAbstract Nitrogen (N) availability limits plant growth and soil carbon (C) sequestration in N‐limited ecosystems, however, plant and soil C feedback on the free‐living nitrogen fixation (FLNF) process is poorly understood. Moreover, whether this feedback is influenced by initial N availability in leguminous and non‐leguminous forest soils has not been clarified. Here, we found that the addition of plant‐ and microbial‐derived C significantly enhanced soil nitrogenase activity (13∼28%) and that microbial‐derived C had a more positive impact. These positive effects were attributed to the direct C‐energy supply (0.49∼0.84) rather than variations in soil microbial activity (−0.01∼0.21) and substrate resources (−0.45∼0.27). Long‐term N addition did not inhibit FLNF. C addition promoted FLNF in soils of the two forests, but the response rate was higher in the leguminous forest soils. Our study reveals that increased soil C availability can drive FLNF in tropical forests, enhancing our understanding of the soil C‐N coupling mechanism.https://doi.org/10.1029/2024GL111238free‐living nitrogen fixationcarbon additiontropical forestscarbon sourcecarbon and nitrogen couplingnitrogen deposition |
| spellingShingle | Meichen Xu Linjie Fan Andi Li Qiyan Liu Guangcan Yu Senhao Wang Baixin Zhang Qing Ye Jiangming Mo Mianhai Zheng Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input Geophysical Research Letters free‐living nitrogen fixation carbon addition tropical forests carbon source carbon and nitrogen coupling nitrogen deposition |
| title | Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input |
| title_full | Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input |
| title_fullStr | Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input |
| title_full_unstemmed | Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input |
| title_short | Plant and Microbial Carbon Are Important Drivers of Free‐Living Nitrogen Fixation in Tropical Forest Soils: A New Discovery of Carbon‐Driven Nitrogen Input |
| title_sort | plant and microbial carbon are important drivers of free living nitrogen fixation in tropical forest soils a new discovery of carbon driven nitrogen input |
| topic | free‐living nitrogen fixation carbon addition tropical forests carbon source carbon and nitrogen coupling nitrogen deposition |
| url | https://doi.org/10.1029/2024GL111238 |
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