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DOI	10.1016/j.scitotenv.2023.163448
	Effects of nitrogen and phosphorus additions on CH4 flux in wet meadow of Qinghai-Tibet Plateau
	Wu, Jiangqi; Lu, Yanhua; Wang, Haiyan; Li, Guang
发表日期	2023
ISSN	0048-9697
EISSN	1879-1026
卷号	887
英文摘要	Methane (CH4) is a critical greenhouse gas, and wetlands are the largest natural emitters of CH4. Owing to global climate change and the intensification of anthropogenic activities, the input of exogenous nutrients such as nitrogen (N) and phosphorus (P) into wetland ecosystems has increased, which may significantly affect nutrient cycling and CH4 fluxes from wetlands. However, the environmental and microbial effects of the addition of N and P on CH4 emissions from alpine wetlands have not been thoroughly examined. We conducted a two-year field experiment with N and P addition to examine its impact on CH4 emissions from wetlands on the Qinghai-Tibet Plateau (QTP). The treatments comprised a blank control (CK), N addition (15 kg N ha-1 yr-1, N15), P addition (15 kg P ha-1 yr-1, P15), and NP coaddition (15 kg NP ha-1 yr-1, N15P15). We measured CH4 flux, soil environmental factors, and microbial community structure for each treatment plot. The results showed that the CH4 emissions of N and P addition were higher than CK. Specifically, the CH4 fluxes of N15, P15, and N15P15 treatments were 0.46 mg CH4 m-2 h-1, 4.83 mg CH4 m-2 h-1, and 0.95 mg CH4 m-2 h-1 higher than the CK. Additionally, the CH4 fluxes of N15P15 treatments was 3.88 mg CH4 m-2 h-1 lower than the P15 and 0.49 mg CH4 m-2 h-1 higher than the N15. This finding indicated that the CH4 flux in the alpine wetland soil was more sensitive to the addition of P. N and P addition increased not only soil organic carbon content (P < 0.05) but also the relative abundance of Chloroflexi and Actinobacteria in the soil, which may be the main reason for the promotion of CH4 emissions. Therefore, our results indicate that N and P addition can change the microbial abundance and community structure of wetland soil, and the distribution of soil carbon, promote CH4 emissions, and ultimately affect the carbon sink function of wetland ecosystems.
关键词	Nitrogen addition Phosphorus addition CH 4 flux Wet meadow Qinghai -Tibet Plateau
英文关键词	SOIL MICROBIAL COMMUNITY; METHANE EMISSIONS; CARBON; N2O; CO2; RESPONSES; DYNAMICS; 3-YEAR; PADDY
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001000557600001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282865
作者单位	Gansu Agricultural University
推荐引用方式 GB/T 7714	Wu, Jiangqi,Lu, Yanhua,Wang, Haiyan,et al. Effects of nitrogen and phosphorus additions on CH4 flux in wet meadow of Qinghai-Tibet Plateau[J],2023,887.
APA	Wu, Jiangqi,Lu, Yanhua,Wang, Haiyan,&Li, Guang.(2023).Effects of nitrogen and phosphorus additions on CH4 flux in wet meadow of Qinghai-Tibet Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,887.
MLA	Wu, Jiangqi,et al."Effects of nitrogen and phosphorus additions on CH4 flux in wet meadow of Qinghai-Tibet Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 887(2023).