Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (3): 900-912.DOI: 10.1016/j.jia.2024.05.024
短期磷添加无法缓解氮沉降对青藏高原高寒草地氧化亚氮排放的刺激作用
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收稿日期:2024-02-19接受日期:2024-04-10出版日期:2025-03-20发布日期:2025-02-28
Short-term P addition may improve the stimulating effects of N deposition on N2O emissions in alpine grasslands on the Qinghai-Tibet Plateau
Jiannan Xiao1, Shikui Dong1, 2#, Hao Shen2, Ran Zhang2, Hang Shi2, Fencai He2, Wei Li1, Xiaoyan Li3, Yu Li4, Chengxiang Ding5
1 School of Environment, Beijing Normal University, Beijing 100875, China
2 School of Grassland Science, Beijing Forestry University, Beijing 100083, China
3 School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
4 School of Public Administration, Chongqing Technology and Business University, Chongqing 400067, China
5 Academy of Animal Husbandry and Veterinary Science, Qinghai University, Xining 810016, China
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Received:2024-02-19Accepted:2024-04-10Online:2025-03-20Published:2025-02-28 -
About author:Jiannan Xiao, E-mail: xjn1009@163.com; #Correspondence Shikui Dong, E-mail: dongshikui@bjfu.edu.cn -
Supported by:This study was funded by the National Key R&D Program of China (2021YFE0112400 and 2023YFF1304303) and the National Natural Science Foundation of China (32361143870 and 32101315).
摘要： 氮添加通常会刺激氧化亚氮排放，而磷添加对氧化亚氮排放的影响尚无定论，且氧化亚氮排放的潜在机制仍不清楚。我们在青藏高原三种典型高寒草地，即高寒草甸、高寒草原和高寒人工草地上，进行了为期两年的野外实验，以探究氮和磷添加对氧化亚氮排放的影响。结果显示，在三个类型的高寒草地上，单独添加氮均促进了氧化亚氮的排放，而单独添加磷对氧化亚氮排放均无显著作用。氮的添加直接导致高寒草甸氧化亚氮排放的增加，在高寒草原则是通过降低土壤pH值，在人工草地是通过降低硝化基因丰度间接促进氧化亚氮排放。氮和磷共同添加促进了高寒草甸和高寒草原的氧化亚氮排放，但仅在高寒草甸表现出交互作用。磷的添加主要通过促进高寒草甸的植物生长来增加由氮添加导致的氧化亚氮排放。总之，我们的研究结果表明，短期磷的添加不能缓解高寒草地生态系统中氮沉降对氧化亚氮排放的刺激作用，甚至可能进一步加剧氧化亚氮排放。
引用本文
Jiannan Xiao, Shikui Dong, Hao Shen, Ran Zhang, Hang Shi, Fencai He, Wei Li, Xiaoyan Li, Yu Li, Chengxiang Ding. 短期磷添加无法缓解氮沉降对青藏高原高寒草地氧化亚氮排放的刺激作用[J]. Journal of Integrative Agriculture, 2025, 24(3): 900-912.
Jiannan Xiao, Shikui Dong, Hao Shen, Ran Zhang, Hang Shi, Fencai He, Wei Li, Xiaoyan Li, Yu Li, Chengxiang Ding. Short-term P addition may improve the stimulating effects of N deposition on N2O emissions in alpine grasslands on the Qinghai-Tibet Plateau[J]. Journal of Integrative Agriculture, 2025, 24(3): 900-912.
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