Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin
Nitrogen cycling in freshwater ecosystems is critical for maintaining water quality, and understanding the processes of nitrification and denitrification is essential for effective nitrogen management, particularly in areas with diverse pollution sources. This study investigated the nitrification an...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI
2024
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| Online Access: | http://psasir.upm.edu.my/id/eprint/118290/ http://psasir.upm.edu.my/id/eprint/118290/1/118290.pdf |
| _version_ | 1848867480246681600 |
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| author | Tong, Lingling Karim, Murni M. Yusoff, Fatimah Aris, Ahmad Zaharin Abdullah, Ahmad Fikri Liu, Feng Li, Dejun Puvanasundram, Puvaneswari |
| author_facet | Tong, Lingling Karim, Murni M. Yusoff, Fatimah Aris, Ahmad Zaharin Abdullah, Ahmad Fikri Liu, Feng Li, Dejun Puvanasundram, Puvaneswari |
| author_sort | Tong, Lingling |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Nitrogen cycling in freshwater ecosystems is critical for maintaining water quality, and understanding the processes of nitrification and denitrification is essential for effective nitrogen management, particularly in areas with diverse pollution sources. This study investigated the nitrification and denitrification processes in three tributaries of the Jinjing River—Tuojia (agricultural), Jinjing (residential), and Guanjia (woodland)—during both the wet and dry seasons. The potential nitrification rates (PNRs) and potential denitrification rates (PDNRs) were measured across these sites. The highest rates were observed in Tuojia during the wet season, with the PNR reaching 39.7 µg·kg−1 h −1 and the PDNR reaching 3.25 mg·kg−1 ·h −1 , while the rates were considerably lower in Jinjing and Guanjia. The ammonia-oxidizing archaea (AOA) abundance was higher than the ammonia-oxidizing bacteria (AOB) abundance at all sites, with Tuojia exhibiting the highest AOA abundance (5.9 × 107 copies·g −1 ) during the wet season. The nitrate-nitrogen (NO3 −-N) content was a key factor influencing denitrification, and the AOA abundance was significantly correlated with nitrification rates (r = 0.69; p < 0.05). These findings highlight the spatial and seasonal variability in nitrogen cycling and emphasize the importance of developing targeted nitrogen management strategies in regions with mixed land uses and pollution sources. |
| first_indexed | 2025-11-15T14:37:10Z |
| format | Article |
| id | upm-118290 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T14:37:10Z |
| publishDate | 2024 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1182902025-07-03T23:50:04Z http://psasir.upm.edu.my/id/eprint/118290/ Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin Tong, Lingling Karim, Murni M. Yusoff, Fatimah Aris, Ahmad Zaharin Abdullah, Ahmad Fikri Liu, Feng Li, Dejun Puvanasundram, Puvaneswari Nitrogen cycling in freshwater ecosystems is critical for maintaining water quality, and understanding the processes of nitrification and denitrification is essential for effective nitrogen management, particularly in areas with diverse pollution sources. This study investigated the nitrification and denitrification processes in three tributaries of the Jinjing River—Tuojia (agricultural), Jinjing (residential), and Guanjia (woodland)—during both the wet and dry seasons. The potential nitrification rates (PNRs) and potential denitrification rates (PDNRs) were measured across these sites. The highest rates were observed in Tuojia during the wet season, with the PNR reaching 39.7 µg·kg−1 h −1 and the PDNR reaching 3.25 mg·kg−1 ·h −1 , while the rates were considerably lower in Jinjing and Guanjia. The ammonia-oxidizing archaea (AOA) abundance was higher than the ammonia-oxidizing bacteria (AOB) abundance at all sites, with Tuojia exhibiting the highest AOA abundance (5.9 × 107 copies·g −1 ) during the wet season. The nitrate-nitrogen (NO3 −-N) content was a key factor influencing denitrification, and the AOA abundance was significantly correlated with nitrification rates (r = 0.69; p < 0.05). These findings highlight the spatial and seasonal variability in nitrogen cycling and emphasize the importance of developing targeted nitrogen management strategies in regions with mixed land uses and pollution sources. MDPI 2024 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/118290/1/118290.pdf Tong, Lingling and Karim, Murni and M. Yusoff, Fatimah and Aris, Ahmad Zaharin and Abdullah, Ahmad Fikri and Liu, Feng and Li, Dejun and Puvanasundram, Puvaneswari (2024) Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin. Agriculture-Basel, 14 (12). art. no. 2330. pp. 1-14. ISSN 2077-0472 https://www.mdpi.com/2077-0472/14/12/2330 10.3390/agriculture14122330 |
| spellingShingle | Tong, Lingling Karim, Murni M. Yusoff, Fatimah Aris, Ahmad Zaharin Abdullah, Ahmad Fikri Liu, Feng Li, Dejun Puvanasundram, Puvaneswari Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin |
| title | Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin |
| title_full | Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin |
| title_fullStr | Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin |
| title_full_unstemmed | Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin |
| title_short | Study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: A case study of the Jinjing Basin |
| title_sort | study on characteristics of nitrification and denitrification of three small watersheds during wet and dry seasons under various sources of pollution: a case study of the jinjing basin |
| url | http://psasir.upm.edu.my/id/eprint/118290/ http://psasir.upm.edu.my/id/eprint/118290/ http://psasir.upm.edu.my/id/eprint/118290/ http://psasir.upm.edu.my/id/eprint/118290/1/118290.pdf |