Greater soil microbial biomass loss at low frequency of N addition in an Inner Mongolia grassland

doi:10.1093/jpe/rtac015

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	Greater soil microbial biomass loss at low frequency of N addition in an Inner Mongolia grassland
	Ning, Qiushi ; Jiang, Liangchao 4; Wang, Ruzhen 2,3; Wang, Jing ; Han, Xingguo 4; Yang, Junjie 4
刊名	JOURNAL OF PLANT ECOLOGY
	2022
卷号	15 期号:4 页码:721-732
关键词	nitrogen addition frequency temperate grasslands nutrient imbalance fungi to bacteria ratio plant-microbe interaction belowground net primary production Shannon-Weiner diversity index
ISSN号	1752-9921
DOI	10.1093/jpe/rtac015
文献子类	Article
英文摘要	Soil microbial biomass is critical for biogeochemical cycling and serves as precursor for carbon (C) sequestration. The anthropogenic nitrogen (N) input has profoundly changed the pool of soil microbial biomass. However, traditional N deposition simulation experiments have been exclusively conducted through infrequent N addition, which may have caused biased effects on soil microbial biomass compared with those under the natural and continuous N deposition. Convincing data are still scarce about how the different N addition frequencies affect soil microbial biomass. By independently manipulating the frequencies (2 times vs. 12 times N addition yr(-1)) and the rates (0-50 g N m(-2) yr(-1)) of N addition, our study aimed to examine the response of soil microbial biomass C (MBC) to different N addition frequencies with increasing N addition rates. Soil MBC gradually decreased with increasing N addition rates under both N addition frequencies, while the soil MBC decreased more at low frequency of N addition, suggesting that traditional studies have possibly overestimated the effects of N deposition on soil microbial biomass. The greater soil microbial biomass loss with low N frequency resulted from the intensified soil acidification, higher soil inorganic N, stronger soil C and N imbalance, less net primary production allocated to belowground and lower fungi to bacteria ratio. To reliably predict the effects of atmospheric N deposition on soil microbial functioning and C cycling of grassland ecosystems in future studies, it is necessary to employ both the dosage and the frequency of N addition.
学科主题	Plant Sciences ; Ecology ; Forestry
电子版国际标准刊号	1752-993X
出版地	OXFORD
WOS关键词	LONG-TERM NITROGEN ; ORGANIC-CARBON ; PLANT ; RESPONSES ; COMMUNITIES ; MICROORGANISMS ; PERSPECTIVE ; ECOSYSTEMS ; MECHANISMS ; ENRICHMENT
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000842121500001
资助机构	National Natural Science Foundation of China [42130515, 31770506] ; Open Foundation of the State Key Laboratory of Urban and Regional Ecology of China ; Open Foundation of the State Key Laboratory of Grassland Agro-ecosystems of China
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28655]
专题	植被与环境变化国家重点实验室
作者单位	1.Hebei Univ, Sch Life Sci, Baoding 071002, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Ecosyst Res Stn, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Ning, Qiushi,Jiang, Liangchao,Wang, Ruzhen,et al. Greater soil microbial biomass loss at low frequency of N addition in an Inner Mongolia grassland[J]. JOURNAL OF PLANT ECOLOGY,2022,15(4):721-732.
APA	Ning, Qiushi,Jiang, Liangchao,Wang, Ruzhen,Wang, Jing,Han, Xingguo,&Yang, Junjie.(2022).Greater soil microbial biomass loss at low frequency of N addition in an Inner Mongolia grassland.JOURNAL OF PLANT ECOLOGY,15(4),721-732.
MLA	Ning, Qiushi,et al."Greater soil microbial biomass loss at low frequency of N addition in an Inner Mongolia grassland".JOURNAL OF PLANT ECOLOGY 15.4(2022):721-732.