Positive responses of belowground C dynamics to nitrogen enrichment in China

doi:10.1016/j.scitotenv.2017.10.215

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	Positive responses of belowground C dynamics to nitrogen enrichment in China
	Deng, Lei 1,2; Peng, Changhui 1,2; Zhu, Guangyu 1; Chen, Lei 1; Liu, Yulin 1; Shangguan, Zhouping 1; Deng, L ; Shangguan, ZP (reprint author), 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018
卷号	616 页码:1035-1044
关键词	Climate Land Use Type Meta-analysis n Addition Soil Carbon Soil Respiration
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.10.215
文献子类	Article
英文摘要	Determining how nitrogen (N) impacts ecosystem carbon (C) cycling is critical to using C sequestration to offset anthropogenic CO2 emissions. The N deposition rate in China is higher than the global average; however, many results of N enrichment experiments in China have not been included in global syntheses. In this study, we assembled a large dataset that comprised 124 published studies concerning N addition experiments, including 570 observations at 127 sites across China, to quantify the responses of belowground C dynamics to N enrichment in terrestrial ecosystems in China by a meta-analysis. The results showed that overall soil organic C, dissolved organic C (DOC) and soil microbial biomass C (MBC) increased by 1.8, 7.4, and 8.8%, respectively (P < 0.05), in response to N enrichment; belowground biomass and litter increased by 14.6 and 24.4%, respectively (P < 0.05); and soil respiration increased by 6.1% (P < 0.05). N enrichment promoted C inputs into the soil mainly by increasing litter and belowground biomass inputs. Additionally, N enrichment increased C output by increasing soil respiration. Land use type and N addition level had different impacts on the soil C pool and on soil respiration. DOC, MBC, and litter exhibited more positive responses to N deposition in cooler and more arid regions than in other regions. The meta-analysis indicated that N enrichment had a positive impact on belowground C cycles in China. Climate played a greater role than did N deposition level in affecting processes of ecosystem C cycling. Moreover, belowground C cycle processes are determined by complicated interactions among land use type, N enrichment, and climate. (c) 2017 Elsevier B.V. All rights reserved.
学科主题	Environmental Sciences
出版地	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000424121800105
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7835]
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Deng, L; Shangguan, ZP (reprint author), 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.（2）Univ Quebec Montreal, Dept Biol Sci, Ctr CEF ESCER, Montreal, PQ H3C 3P8, Canada
推荐引用方式 GB/T 7714	Deng, Lei,Peng, Changhui,Zhu, Guangyu,et al. Positive responses of belowground C dynamics to nitrogen enrichment in China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,616:1035-1044.
APA	Deng, Lei.,Peng, Changhui.,Zhu, Guangyu.,Chen, Lei.,Liu, Yulin.,...&Shangguan, ZP .(2018).Positive responses of belowground C dynamics to nitrogen enrichment in China.SCIENCE OF THE TOTAL ENVIRONMENT,616,1035-1044.
MLA	Deng, Lei,et al."Positive responses of belowground C dynamics to nitrogen enrichment in China".SCIENCE OF THE TOTAL ENVIRONMENT 616(2018):1035-1044.