Association between CH4 uptake and N2O emission in grassland depends on nitrogen inputs

doi:10.1093/jpe/rtae078

J Plant Ecol ›› 2024, Vol. 17 ›› Issue (6): rtae078.DOI: 10.1093/jpe/rtae078

• Research Articles • Previous Articles

Association between CH₄uptake and N₂O emission in grassland depends on nitrogen inputs

Yiming Ren¹, Yangxinzi Zao², Ying Zhao¹, Rui Su¹, Guowei Yang¹, Xiran Li¹, Jingru Kang¹, Yiyu Shi², Yuru Xie³, Nannan Wang⁴, Yunjiang Zuo⁴, Kexin Li⁴, Liyuan He⁵, Xiaofeng Xu⁵, Lihua Zhang^1,4,6*

¹ College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
² College of Science, Minzu University of China, Beijing 100081, China
³ College of Fine Arts, Minzu University of China, Beijing 100081, China
⁴ Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
⁵ Biology Department, San Diego State University, San Diego, CA 92182, USA
⁶ State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

^*Corresponding author. E-mail: zhanglihua788403@126.com

Received:2024-06-25 Accepted:2024-08-18 Online:2024-08-24 Published:2024-12-01
Supported by:
This study was partially supported by the National Natural Science Foundation of China (32271681) and by Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission (KLEEMA202206).

氮添加对草地生态系统CH₄吸收与N₂O排放耦合关系的影响

Abstract

Abstract: Increasing nitrogen (N) input has been recognized as one of the important factors inﬂuencing methane (CH₄) uptake and nitrous oxide (N₂O) emission in arid and semiarid grasslands. Numerous studies have examined the spatiotemporal variations of CH₄ and N₂O fluxes in various ecosystems; however, the variation of the interplay between CH₄ uptake and N₂O emission with increasing N has not yet been well understood. This study explored the relationship between CH₄ uptake and N₂O emission in a semiarid grassland in Inner Mongolia, northern China, under a gradient of 12-year N additions. We found a synergistic relationship at low-N levels, where CH₄ uptake and N₂O emission are positively correlated. Conversely, an antagonistic interaction emerged with a negative correlation between CH₄ uptake and N₂O emission observed at high-N levels, which was evidenced by a 33.62% decrease in CH₄ uptake and a 264.91% increase in N₂O emission. Further independent analysis, covering at least five N addition levels across grassland ecosystems in China, confirmed the general pattern: three of four cases showed a synergistic relationship at low-N levels and an antagonistic relationship at high-N levels. Given the increasing N deposition in the future, the dynamics between CH₄ uptake and N₂O emission are critical for understanding the impact of external N input on net greenhouse gas emission and consequent global climate change.

Key words: CH₄ uptake, N₂O emission, N addition, Coupling relation, Semiarid grasslands

摘要：
氮(N)输入增加是影响干旱和半干旱草地甲烷(CH₄)吸收和氧化亚氮(N₂O)排放的重要因素之一。已有大量研究探讨了不同生态系统中CH₄和N₂O通量的时空变化，但尚不清楚CH₄吸收和N₂O排放之间的耦合关系随着N输入的增加如何变化。本研究依托中国北部内蒙古半干旱草原地区开展了连续12年的N添加实验平台，探讨CH₄吸收与N₂O排放之间的耦合关系。研究结果表明，CH₄吸收和N₂O排放在低N添加条件下呈现正相关的协同关系；在高N添加条件下，呈现负相关的拮抗关系，具体表现为CH₄吸收减少了33.6%，N₂O排放增加了264.9%。中国草地生态系统至少5个N添加水平实验的独立分析证实了这一普遍规律：4个N添加实验中，有3个在低N水平上表现出协同关系，在高N水平上表现出拮抗关系。考虑到未来N沉降会增加，本研究中观察到的CH₄吸收与N₂O排放之间耦合关系的变化对于理解外源N输入对温室气体净排放及其对全球气候变化的影响至关重要。

关键词: CH₄吸收, N₂O排放, N添加, 耦合关系, 半干旱草原

Yiming Ren, Yangxinzi Zao, Ying Zhao, Rui Su, Guowei Yang, Xiran Li, Jingru Kang, Yiyu Shi, Yuru Xie, Nannan Wang, Yunjiang Zuo, Kexin Li, Liyuan He, Xiaofeng Xu, Lihua Zhang. Association between CH₄uptake and N₂O emission in grassland depends on nitrogen inputs[J]. J Plant Ecol, 2024, 17(6): 1-14.

[1]	Qiuhua Li, Yakun Liu, Xinyue Jin, Xiaotian Fan, Jiaqiang Wang, Wanbing Liu, Chunbo Li, Jishuai Su, Osbert Jianxin Sun, Xingguo Han, Yong Jiang, Heyong Liu. Changes in nutrient resorption efficiency with nitrogen and zinc addition and mowing in a meadow steppe [J]. J Plant Ecol, 2026, 19(2): 0-.
[2]	Fangling Ma, Yao Zheng, La Wei, Lin Xiang, Lifei Ren, Wenming Bai, Qiuying Tian, Wen-Hao Zhang. Soil chemistry exerts a more significant influence on bacterial responses to nitrogen disturbances than root exudates [J]. J Plant Ecol, 2025, 18(6): 1-37.
[3]	Zhilong Zhao, Jinyang Yu, Wenxuan Zhao, Miao Ma, Jieshi Tang. Intraspecific differentiation and phenotypic plasticity help the invasive success of Xanthium italicum [J]. J Plant Ecol, 2025, 18(5): 1-31.
[4]	Jian-Guo Ma, Fu-Jiang Hou, Xiao-Bo Wang. Dissimilar soil nitrogen transformation features of dominant forage after intensive grazing on Qinghai-Tibetan Plateau [J]. J Plant Ecol, 2025, 18(3): 1-11.
[5]	Xiaoyi Wang, Anne D. Bjorkman, Xin Li, Mengdi Luan, Mengqian Wang, Xuebin Yan, Ying Wang, Xianhui Zhou, Miaojun Ma, Hui Guo. Shifts in plant reproductive phenology induced by multiple global change factors depend on phenological niche and pollination mode [J]. J Plant Ecol, 2025, 18(3): 1-14.
[6]	Jingyuan Yang, Qi Xu, Yuxuan He, Meiguang Jiang, Minglu Ji, Linyu Qi, Huan Qi, Cancan Zhao, Yuan Miao, Shasha Liu, Yanfeng Sun. Effects of nitrogen and phosphorus addition on soil respiration in a soybean cropping system [J]. J Plant Ecol, 2024, 17(6): 1-13.
[7]	Jing-Fang Cai, Kai Sun, Lin Li, Si-Ha A, Yi-Luan Shen, Hong-Li Li. Nitrogen addition increased resistance of resident plant community to Solidago canadensis invasion by altering allelopathic effect [J]. J Plant Ecol, 2024, 17(2): 0-rtae015.
[8]	Yuan Su, Shuaikai Wu, Jie Hao, Huajie Diao, Kuanhu Dong, Changhui Wang. Nutrient resorption exacerbates nitrogen-phosphorus imbalances in plants under increasing nitrogen addition in a saline-alkaline grassland [J]. J Plant Ecol, 2024, 17(1): 1-.
[9]	Jiangshan Yu, Zhaopeng Song, Jihua Hou. Life form-dependent nitrogen-phosphorous allocation strategies of leaf and fine root in a temperate natural forest under long-term nitrogen addition [J]. J Plant Ecol, 2023, 16(5): 0-rtad013.
[10]	Pei Zheng, Ruonan Zhao, Liangchao Jiang, Guojiao Yang, Yinliu Wang, Ruzhen Wang, Xingguo Han, Qiushi Ning. Increasing nitrogen addition rates suppressed long-term litter decomposition in a temperate meadow steppe [J]. J Plant Ecol, 2023, 16(3): 0-rtac078.
[11]	Bowen Li, Jianping Sun, Shiping Wang, Wangwang Lv, Yang Zhou, Peipei Liu, Qi Wang, Wang A, Suren Zhang, Lu Xia, Huan Hong, Lili Jiang, Caiyun Luo, Zhenhua Zhang, Shilong Piao, Yanfen Wang, Tsechoe Dorji. Greater responses of flower phenology of Kobresia pygmaea community to precipitation addition than to constant and stepwise warming [J]. J Plant Ecol, 2023, 16(2): 0-rtac066.
[12]	Qiang Guo, Ruo-Hui Zhang, Xue-Li Li, Xiao-Wei Liu, Ya-Nan Li and Fu Xing. Nitrogen addition overrides the effects of Stellera chamaejasme litter on the growth of Leymus chinensis and its associated mycorrhizal fungi [J]. J Plant Ecol, 2022, 15(5): 1007-1020.
[13]	Qiushi Ning, Liangchao Jiang, Ruzhen Wang, Jing Wang, Xingguo Han and Junjie Yang. Greater soil microbial biomass loss at low frequency of N addition in an Inner Mongolia grassland [J]. J Plant Ecol, 2022, 15(4): 721-732.
[14]	Xiang-Qin Li, Sai-Chun Tang, Yu-Mei Pan, Chun-Qiang Wei and Shi-Hong Lü. Increased precipitation magnifies the effects of N addition on performance of invasive plants in subtropical native communities [J]. J Plant Ecol, 2022, 15(3): 473-484.
[15]	Wei-Ping Zhang, Dario Fornara, Guang-Cai Liu, Josep Peñuelas, Jordi Sardans, Jian-Hao Sun, Li-Zhen Zhang and Long Li. Interspecific interactions affect N and P uptake rather than N:P ratios of plant species: evidence from intercropping [J]. J Plant Ecol, 2022, 15(2): 223-236.

Association between CH₄uptake and N₂O emission in grassland depends on nitrogen inputs

氮添加对草地生态系统CH₄吸收与N₂O排放耦合关系的影响

HTML

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments