Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone
During flooding in the Water Level Fluctuation Zone (WLFZ), nutrient levels of nitrogen (N) and phosphorus (P) in the overlying water fluctuate due to soil nutrient release, impacting the decomposition of plants like Cynodon dactylon. However, limited research on the effects of these nutrient change...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpls.2025.1526507/full |
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| author | Jitao Huang Jitao Huang Ze Luo Ze Luo Zuopeng Xu Zuopeng Xu Yanxue Jiang Yanxue Jiang Jinsong Guo Jinsong Guo |
| author_facet | Jitao Huang Jitao Huang Ze Luo Ze Luo Zuopeng Xu Zuopeng Xu Yanxue Jiang Yanxue Jiang Jinsong Guo Jinsong Guo |
| author_sort | Jitao Huang |
| collection | DOAJ |
| description | During flooding in the Water Level Fluctuation Zone (WLFZ), nutrient levels of nitrogen (N) and phosphorus (P) in the overlying water fluctuate due to soil nutrient release, impacting the decomposition of plants like Cynodon dactylon. However, limited research on the effects of these nutrient changes on plant nutrient release and water dynamics complicates accurate assessments of water quality impacts. This study used 8 water samples with varying initial nutrient levels to simulate N and P changes induced by WLFZ soil nutrients and examined the decomposition and nutrient dynamics of Cynodon dactylon. Results showed that flooding significantly increased initial levels of N and P, especially as particulate nitrogen (PN) and particulate phosphorus (PP), affecting both plant decomposition and nutrient dynamics in the water. After 60 days, Cynodon dactylon lost 47.97%-56.01% dry matter, 43.58%-54.48% total nitrogen (TN), and 14.28%-20.50% total phosphorus (TP). Initial PN and total dissolved nitrogen (TDN) promoted dry matter loss, PN and PP promoted TP loss, while PN and TDN inhibited TN loss. By day 60, no positive correlation was found between plant-released N and P and TN or TP in the overlying water. However, initial PP and PN levels were negatively correlated with TN and TP, indicating an inhibitory effect. Further analysis indicates that PN and PP released from the soil supported the formation of microbial aggregates, enhancing denitrification and phosphorus removal and thus improving water purification over time. |
| format | Article |
| id | doaj-art-7621e25bb4684de1a9afe74148c54aa5 |
| institution | Kabale University |
| issn | 1664-462X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj-art-7621e25bb4684de1a9afe74148c54aa52025-02-10T06:48:28ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2025-02-011610.3389/fpls.2025.15265071526507Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zoneJitao Huang0Jitao Huang1Ze Luo2Ze Luo3Zuopeng Xu4Zuopeng Xu5Yanxue Jiang6Yanxue Jiang7Jinsong Guo8Jinsong Guo9Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing, ChinaCollege of Environment and Ecology, Chongqing University, Chongqing, ChinaKey Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing, ChinaCollege of Environment and Ecology, Chongqing University, Chongqing, ChinaKey Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing, ChinaCollege of Environment and Ecology, Chongqing University, Chongqing, ChinaKey Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing, ChinaCollege of Environment and Ecology, Chongqing University, Chongqing, ChinaKey Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing, ChinaCollege of Environment and Ecology, Chongqing University, Chongqing, ChinaDuring flooding in the Water Level Fluctuation Zone (WLFZ), nutrient levels of nitrogen (N) and phosphorus (P) in the overlying water fluctuate due to soil nutrient release, impacting the decomposition of plants like Cynodon dactylon. However, limited research on the effects of these nutrient changes on plant nutrient release and water dynamics complicates accurate assessments of water quality impacts. This study used 8 water samples with varying initial nutrient levels to simulate N and P changes induced by WLFZ soil nutrients and examined the decomposition and nutrient dynamics of Cynodon dactylon. Results showed that flooding significantly increased initial levels of N and P, especially as particulate nitrogen (PN) and particulate phosphorus (PP), affecting both plant decomposition and nutrient dynamics in the water. After 60 days, Cynodon dactylon lost 47.97%-56.01% dry matter, 43.58%-54.48% total nitrogen (TN), and 14.28%-20.50% total phosphorus (TP). Initial PN and total dissolved nitrogen (TDN) promoted dry matter loss, PN and PP promoted TP loss, while PN and TDN inhibited TN loss. By day 60, no positive correlation was found between plant-released N and P and TN or TP in the overlying water. However, initial PP and PN levels were negatively correlated with TN and TP, indicating an inhibitory effect. Further analysis indicates that PN and PP released from the soil supported the formation of microbial aggregates, enhancing denitrification and phosphorus removal and thus improving water purification over time.https://www.frontiersin.org/articles/10.3389/fpls.2025.1526507/fullwater-level fluctuation zone (WLFZ)floodingplant decompositionnitrogen and phosphoruswater quality |
| spellingShingle | Jitao Huang Jitao Huang Ze Luo Ze Luo Zuopeng Xu Zuopeng Xu Yanxue Jiang Yanxue Jiang Jinsong Guo Jinsong Guo Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone Frontiers in Plant Science water-level fluctuation zone (WLFZ) flooding plant decomposition nitrogen and phosphorus water quality |
| title | Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone |
| title_full | Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone |
| title_fullStr | Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone |
| title_full_unstemmed | Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone |
| title_short | Interactions between N, P in the overlying water and flooding-induced decomposition of Cynodon dactylon in the water-level fluctuation zone |
| title_sort | interactions between n p in the overlying water and flooding induced decomposition of cynodon dactylon in the water level fluctuation zone |
| topic | water-level fluctuation zone (WLFZ) flooding plant decomposition nitrogen and phosphorus water quality |
| url | https://www.frontiersin.org/articles/10.3389/fpls.2025.1526507/full |
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