Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation

doi:10.1016/j.scitotenv.2021.146298

	Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation
	Jing, Hang 1; Liu, Ying 1,2; Wang, Guoliang 1,2; Liu, Guobin 1,2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-08-01
卷号	780 页码:11
关键词	Greenhouse gas Nitrogen addition Rhizosphere soil Root diameter Soil chemical property
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.146298
通讯作者	Liu, Guobin(gbliu@ms.iswc.ac.cn)
英文摘要	Nitrogen (N) addition has variable effects on chemical composition, function, and turnover of roots with different diameters. However, it is unclear whether N addition has variable effects on greenhouse gas (GHG) emission in rhizosphere soil. We performed N addition (0-9 g N m(-2) y(-1)) experiment in a Pinus tabulaeformis forest and a lab-incubation experiment to determine the effects of N addition on carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4) emissions in rhizosphere soils of roots with different diameters (very fine roots: <0.5 mm, intermediate fine roots: 0.5-1.0 mm, largest fine roots: 1.0-2.0 mm). Nitrogen addition significantly promoted CO2 emission and CH4 uptake, with maximum values (CO2, 623.15 mg C kg soil(-1); CH4, 1794.49 mu g degrees C kg soil(-1)) in the 6 or 9 g N m(-2) y(-1) treatments (P < 0.05). Nitrous oxide emissions were inhibited, with the greatest inhibitory effect in the 9 g N m(-2) y(-1) treatment (48.63 mu g N kg soil(-1)). Total phosphorus (TP) content significantly decreased and increased in rhizosphere soil and non-rhizosphere soil after N addition, respectively, while organic carbon (OC), total N (TN), ammonium (NH4+), and nitrate (NO3-) contents in rhizosphere soil increased. A greater change in chemical properties occurred in rhizosphere soil of largest fine roots than very fine roots. Carbon dioxide and nitrous oxide emissions in rhizosphere soil among root sizes exhibited similar responses to N addition. While CH4 uptake was more responsive to N addition in rhizosphere soil with very fine roots than with largest fine roots. Basically, OC, TN, NO3-, and NH4+ were key soil components driving GHG emissions; NO3- promoted CH4 uptake and N2O emissions, NH4+ inhibited CO2 emissions. GHG response to N addition varied greatly, particularly in rhizosphere soil with different root sizes mainly related to its chemical properties. (C) 2021 Elsevier B.V. All rights reserved.
WOS关键词	GREENHOUSE-GAS EMISSIONS ; LAND-USE TYPE ; ORGANIC-MATTER ; CARBON ; DEPOSITION ; FLUXES ; FERTILIZATION ; DECOMPOSITION ; RESPIRATION ; TEMPERATURE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000653088700006
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162876]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Guobin
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Jing, Hang,Liu, Ying,Wang, Guoliang,et al. Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,780:11.
APA	Jing, Hang,Liu, Ying,Wang, Guoliang,&Liu, Guobin.(2021).Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation.SCIENCE OF THE TOTAL ENVIRONMENT,780,11.
MLA	Jing, Hang,et al."Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation".SCIENCE OF THE TOTAL ENVIRONMENT 780(2021):11.