Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands

NWIPB OpenIR

	Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands
	Zhang, Lihua; Yuan, Fenghui; Bai, Junhong; Duan, Hongtao; Gu, Xueying; Hou, Longyu; Huang, Yao; Yang, Mingan; He, Jin-Sheng; Zhang, Zhenhua; Yu, Lijun; Song, Changchun; Lipson, David A.; Zona, Donatella; Oechel, Walter; Janssens, Ivan A.; Xu, Xiaofeng
	2020
发表期刊	ECOLOGY LETTERS
卷号	23 期号:5
摘要	Grassland ecosystems account for more than 10% of the global CH4 sink in soils. A 4-year field experiment found that addition of P alone did not affect CH4 uptake and experimental addition of N alone significantly suppressed CH4 uptake, whereas concurrent N and P additions suppressed CH4 uptake to a lesser degree. A meta-analysis including 382 data points in global grasslands corroborated these findings. Global extrapolation with an empirical modelling approach estimated that contemporary N addition suppresses CH4 sink in global grassland by 11.4% and concurrent N and P deposition alleviates this suppression to 5.8%. The P alleviation of N-suppressed CH4 sink is primarily attributed to substrate competition, defined as the competition between ammonium and CH4 for the methane mono-oxygenase enzyme. The N and P impacts on CH4 uptake indicate that projected increases in N and P depositions might substantially affect CH4 uptake and alter the global CH4 cycle.
关键词	Grassland methane nitrogen phosphorus substrate competition theory
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60404
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zhang, Lihua,Yuan, Fenghui,Bai, Junhong,et al. Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands[J]. ECOLOGY LETTERS,2020,23(5).
APA	Zhang, Lihua.,Yuan, Fenghui.,Bai, Junhong.,Duan, Hongtao.,Gu, Xueying.,...&Xu, Xiaofeng.(2020).Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands.ECOLOGY LETTERS,23(5).
MLA	Zhang, Lihua,et al."Phosphorus alleviation of nitrogen-suppressed methane sink in global grasslands".ECOLOGY LETTERS 23.5(2020).