干旱区生态环境知识资源中心(Arid): Soil respiration response to alterations in precipitation and nitrogen addition in a desert steppe in northern China

Arid

DOI	10.1016/j.scitotenv.2019.05.419
	Soil respiration response to alterations in precipitation and nitrogen addition in a desert steppe in northern China
	Wang, Zhen 1; Mckenna, Thomas P.2; Schellenberg, Michael P.3; Tang, Shiming 4; Zhang, Yujuan 1; Ta, Na 1; Na, Risu 1; Wang, Hai 1
通讯作者	Na, Risu ; Wang, Hai
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	688 页码:231-242
英文摘要	Global climate change is expected to significantly influence soil respiration. When limited, rainfall and nitrogen (N) deposition strongly modify soil respiration in a broad range of biomes, but uncertainty remains with regards to the influence of the interactions of seasonal rainfall distribution and N deposition on soil respiration in an arid steppe. In the present study, we manipulated precipitation using V-shaped plexiglass gutters (minus 50%, control, and plus 50% treatments) and tested various N additions (control and plus 35 kg N ha(-1) yr(-1)) to evaluate their impact on soil respiration, measured using a Li-Cor 8100, in a desert steppe in China. Increased precipitation stimulated soil respiration by 26.1%, while decreased precipitation significantly reduced soil respiration by 10.8%. There was a significant increase in soil respiration under N addition at 11.5%. Statistical assessment of their interactions demonstrated that N supplementation strengthened the stimulation of soil respiration under increased precipitation, whereas decreased precipitation offset the positive impact of N addition and led to a reduction in soil respiration. Contrasting interannual precipitation patterns strongly influenced the temporal changes in soil respiration as well as its response to N addition, indicating that the desert steppe plant community was co-limited by water and N. Net primary productivity (aboveground and belowground) predominantly drove soil respiration under altered precipitation and N addition. As grasses are better equipped for water deficit due to their previous exposure to long periods without water, there could be a shift from forb to grass communities under drier conditions. These findings highlight the importance of assessing the differential impacts of plant traits and soil physiochemical properties on soil respiration under altered precipitation and N addition. (C) 2019 Published by Elsevier B.V.
英文关键词	Grass Forb Soil water content Net primary productivity Soil total nitrogen content
类型	Article
语种	英语
国家	Peoples R China ; USA ; Canada
收录类别	SCI-E
WOS记录号	WOS:000481589100025
WOS关键词	MICROBIAL RESPIRATION ; SEMIARID GRASSLANDS ; ROOT RESPIRATION ; WATER PULSES ; CO2 FLUXES ; PLANT ; CARBON ; FERTILIZATION ; TEMPERATURE ; ECOSYSTEM
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218720
作者单位	1.Chinese Acad Agr Sci, Grassland Res Inst, Hohhot 010010, Peoples R China; 2.Univ Kansas, Kansas Biol Survey, Dept Ecol & Evolutionary Biol, Lawrence, KS 66047 USA; 3.AAFC AAC, SCRDC, Box 1030, Swift Current, SK S9H 3X2, Canada; 4.Inner Mongolia Univ, Dept Ecol, Sch Ecol & Environm, 235 West Coll Rd, Hohhot 010021, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhen,Mckenna, Thomas P.,Schellenberg, Michael P.,et al. Soil respiration response to alterations in precipitation and nitrogen addition in a desert steppe in northern China[J],2019,688:231-242.
APA	Wang, Zhen.,Mckenna, Thomas P..,Schellenberg, Michael P..,Tang, Shiming.,Zhang, Yujuan.,...&Wang, Hai.(2019).Soil respiration response to alterations in precipitation and nitrogen addition in a desert steppe in northern China.SCIENCE OF THE TOTAL ENVIRONMENT,688,231-242.
MLA	Wang, Zhen,et al."Soil respiration response to alterations in precipitation and nitrogen addition in a desert steppe in northern China".SCIENCE OF THE TOTAL ENVIRONMENT 688(2019):231-242.