Unimodal Response of Soil Methane Consumption to Increasing Nitrogen Additions

NWIPB OpenIR

	Unimodal Response of Soil Methane Consumption to Increasing Nitrogen Additions
	Peng, Yunfeng; Wang, Guanqin; Li, Fei; Yang, Guibiao; Fang, Kai; Liu, Li; Qin, Shuqi; Zhang, Dianye; Zhou, Guoying; Fang, Huajun; Liu, Xuejun; Liu, Chunyan; Yang, Yuanhe
	2019
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷号	53 期号:8
摘要	Nitrogen (N) status has a great impact on methane (CH4) consumption by soils. Modeling studies predicting soil CH4 consumption assume a linear relationship between CH4 uptake and N addition rate. Here, we present evidence that a nonlinear relationship may better characterize changes in soil CH4 uptake with increasing N additions. By conducting a field experiment with eight N-input levels in a Tibetan alpine steppe, we observed a unimodal relationship; CH4 uptake increased at low to medium N levels but declined at high N levels. Environmental and microbial properties jointly determined this response pattern. The generality of the unimodal trend was further validated by two independent analyses: (i) we examined soil CH4 uptake across at least five N-input levels in upland ecosystems across China. A unimodal CH4 uptake-N addition rate relationship was observed in 3 out of 4 cases; and (ii) we performed a meta-analysis to explore the N-induced changes in soil CH4 uptake with increasing N additions across global upland ecosystems. Results showed that the changes in CH4 uptake exhibited a quadratic correlation with N addition rate. Overall, we suggest that the unimodal relationship should be considered in biogeochemistry models for accurately predicting soil CH4 consumption under global N enrichment.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59814
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	Peng, Yunfeng,Wang, Guanqin,Li, Fei,et al. Unimodal Response of Soil Methane Consumption to Increasing Nitrogen Additions[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(8).
APA	Peng, Yunfeng.,Wang, Guanqin.,Li, Fei.,Yang, Guibiao.,Fang, Kai.,...&Yang, Yuanhe.(2019).Unimodal Response of Soil Methane Consumption to Increasing Nitrogen Additions.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(8).
MLA	Peng, Yunfeng,et al."Unimodal Response of Soil Methane Consumption to Increasing Nitrogen Additions".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.8(2019).