N balance and cycling of Inner Mongolia typical steppe: a comprehensive case study of grazing effects

doi:10.1890/12-0114.1

	N balance and cycling of Inner Mongolia typical steppe: a comprehensive case study of grazing effects
	Giese, M.; Brueck, H.; Gao, Y. Z.; Lin, S.; Steffens, M.; Koegel-Knabner, I.; Glindemann, T.; Susenbeth, A.; Taube, F.; Butterbach-Bahl, K.; Zheng, X. H.; Hoffmann, C.; Bai, Y. F.; Han, X. G.
	2013
发表期刊	ECOLOGICAL MONOGRAPHS
ISSN	0012-9615
卷号	83 期号:2 页码:195-219
摘要	Increasing grazing pressure and climate change affect nitrogen (N) dynamics of grassland ecosystems in the Eurasian steppe belt with unclear consequences for future delivery of essential services such as forage production, C sequestration, and diversity conservation. The identification of key processes responsive to grazing is crucial to optimize grassland management. In this comprehensive case study of a Chinese typical steppe, we present an in-depth analysis of grazing effects on N dynamics, including the balance of N gains and losses, and N cycling. N pools and fluxes were simultaneously quantified on three grassland sites of different long-term grazing intensities. Dust deposition, wind erosion, and wet deposition were the predominant but most variable processes contributing to N losses and gains. Heavy grazing increased the risk of N losses by wind erosion. Hay-making and sheep excrement export to folds during nighttime keeping were important pathways of N losses from grassland sites. Compared to these fluxes, gaseous N losses (N2O, NO, N-2,N- and NH3) and N losses via export of sheep live mass and wool were of minor relevance. Our N balance calculation indicated mean annual net N losses of 0.9 +/- 0.8 g N/m(2) (mean +/- SD) at the heavily grazed site, whereas the long-term ungrazed site was an N sink receiving mean annual inputs of 1.8 +/- 1.1 g N/m(2), mainly due to dust deposition. Heavy grazing reduced pool sizes of topsoil organic N, above- and belowground biomass, and N fluxes with regard to plant N uptake, decomposition, gross microbial N turnover, and immobilization. Most N-related processes were more intensive in seasons of higher water availability, indicating complex interactions between land use intensity and climate variability. The projected increase of atmospheric N depositions and changes in rainfall pattern imposed by land use change will likely affect N sink-source pathways and N flux dynamics, indicating high potential impact on grassland ecosystem functions. Land use practices will be increasingly important for the management of N dynamics in Chinese typical steppe and, therefore, must be considered as key component to maintain, restore or optimize ecosystem services.
关键词	China climate variability grassland land use N dynamics N pathways semiarid sheep
学科领域	Ecology
DOI	10.1890/12-0114.1
收录类别	SCI
语种	英语
WOS关键词	SOIL ORGANIC-MATTER ; NET PRIMARY PRODUCTIVITY ; XILIN RIVER-BASIN ; SEMIARID GRASSLAND ; NITROGEN MINERALIZATION ; SHORTGRASS STEPPE ; LAND-USE ; CLIMATE-CHANGE ; GREAT-PLAINS ; AMMONIA VOLATILIZATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000319400600004
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1557-7015
资助机构	German Science Foundation (Deutsche Forschungsgemeinschaft, DFG, Research Group 536)(German Research Foundation (DFG)) ; National Science Foundation of China (NSFC)(National Natural Science Foundation of China (NSFC))
作者邮箱	Butterbach-Bahl, Klaus/A-8081-2013 ; Hoffmann, Carsten/D-1461-2013 ; LAPC, IAP/AAI-6991-2020 ; Steffens, Markus/C-3268-2012 ; Zheng, Xunhua/D-3048-2017 ; Zheng, Xunhua/AAH-8172-2019 ; Kögel-Knabner, Ingrid/A-7905-2008 ; Han, Xingguo/K-7552-2016
引用统计	被引频次：99[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28104
专题	植被与环境变化国家重点实验室
作者单位	1.[Giese, M. 2.Brueck, H.] Univ Hohenheim, Dept Crop Prod & Agroecol Trop & Subtrop, D-70593 Stuttgart, Germany 3.[Brueck, H. 4.Gao, Y. Z.] Univ Kiel, Inst Plant Nutr & Soil Sci, D-24118 Kiel, Germany 5.[Gao, Y. Z.] NE Normal Univ, Inst Grassland Sci, Changchun 130024, Peoples R China 6.[Lin, S.] China Agr Univ, Inst Plant Nutr, Beijing 100094, Peoples R China 7.[Steffens, M. 8.Koegel-Knabner, I.] Tech Univ Munich, Lehrstuhl Bodenkunde, Dept Okol & Okosyst Management, Wissensch Zentrum Weihenstephan Ernahrung Landnut, D-85350 Freising Weihenstephan, Germany 9.[Glindemann, T. 10.Susenbeth, A.] Univ Kiel, Inst Anim Nutr & Physiol, D-24118 Kiel, Germany 11.[Taube, F.] Univ Kiel, Inst Grass & Forage Sci Organ Agr, D-24118 Kiel, Germany 12.[Butterbach-Bahl, K.] Forschungszentrum Karlsruhe, Inst Meteorol & Climate Res, Atmospher Environm Res IMK IFU, D-82467 Garmisch Partenkirchen, Germany 13.[Zheng, X. H.] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing, Peoples R China 14.[Hoffmann, C.] Leibniz Ctr Agr Landscape Res Muncheberg eV, Inst Soil Landscape Res, D-15374 Muncheberg, Germany 15.[Bai, Y. F.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 16.[Han, X. G.] Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Giese, M.,Brueck, H.,Gao, Y. Z.,et al. N balance and cycling of Inner Mongolia typical steppe: a comprehensive case study of grazing effects[J]. ECOLOGICAL MONOGRAPHS,2013,83(2):195-219.
APA	Giese, M..,Brueck, H..,Gao, Y. Z..,Lin, S..,Steffens, M..,...&Han, X. G..(2013).N balance and cycling of Inner Mongolia typical steppe: a comprehensive case study of grazing effects.ECOLOGICAL MONOGRAPHS,83(2),195-219.
MLA	Giese, M.,et al."N balance and cycling of Inner Mongolia typical steppe: a comprehensive case study of grazing effects".ECOLOGICAL MONOGRAPHS 83.2(2013):195-219.

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