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The impacts of precipitation increase and nitrogen addition on soil respiration in a semiarid temperate steppe
Zhang, Xiaolin; Tan, Yulian; Zhang, Bingwei; Li, Ang; Daryanto, Stefani1; Wang, Lixin1; Huang, Jianhui2
Source PublicationECOSPHERE
AbstractSoil respiration, R-s, is strongly controlled by water availability in semiarid grasslands. However, how R-s is affected by precipitation change (either as rainfall or as snowfall) especially under increasing nitrogen (N) deposition has been uncertain. A manipulative experiment to investigate the responses of growing season R-s to changes in spring snowfall or summer rainfall with or without N addition was conducted in the semiarid temperate steppe of China during three hydrologically contrasting years. Our results showed that both spring snow addition and summer water addition significantly increased R-s by increasing soil moisture. The effect of spring snow addition only occurred in years with both relatively lower natural snowfall and later snowmelt time. Summer water addition showed a much stronger effect on R-s by increasing plant root growth and microbial activities, but the magnitude also largely depended on the possible legacy effect of previous year precipitation. Our results indicated that precipitation increase in the form of snowfall had weaker effects than that in the form of rainfall as the former only accounted for less than 30% of total precipitation. Compared with other ecosystem processes, R-s was less responsible for increase in N deposition as it did not increase root productivity and microbial activities in the soils. Our results provided field data constraints for modeling the ecosystem carbon balance under the future global change scenarios in semiarid grasslands.
KeywordInner Mongolia nitrogen addition snow addition soil respiration temperate typical steppe water addition
Subject AreaPlant Sciences ; Evolutionary Biology
Indexed BySCI
WOS IDWOS:000414549400033
Publication PlaceHOBOKEN
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670483, 31430016] ; Strategic Priority Research Program on Soil and Microbes of the Chinese Academy of Sciences [XDB15010401]
Corresponding Author Emailjhhuang@ibcas.ac.cn
OABronze, Green Submitted
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Indiana Univ Purdue Univ, Dept Earth Sci, Indianapolis, IN 46202 USA
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xiaolin,Tan, Yulian,Zhang, Bingwei,et al. The impacts of precipitation increase and nitrogen addition on soil respiration in a semiarid temperate steppe[J]. ECOSPHERE,2017,8(1).
APA Zhang, Xiaolin.,Tan, Yulian.,Zhang, Bingwei.,Li, Ang.,Daryanto, Stefani.,...&Huang, Jianhui.(2017).The impacts of precipitation increase and nitrogen addition on soil respiration in a semiarid temperate steppe.ECOSPHERE,8(1).
MLA Zhang, Xiaolin,et al."The impacts of precipitation increase and nitrogen addition on soil respiration in a semiarid temperate steppe".ECOSPHERE 8.1(2017).
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