Full TGIF Record # 176984
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DOI:10.1007/s11104-010-0509-9
Web URL(s):https://link.springer.com/content/pdf/10.1007%2Fs11104-010-0509-9.pdf
    Last checked: 07/09/2018
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https://link.springer.com/article/10.1007%2Fs11104-010-0509-9
    Last checked: 10/05/2017
Publication Type:
i
Refereed
Author(s):Giese, Marcus; Gao, Ying Zhi; Lin, Shan; Brueck, Holger
Author Affiliation:Giese, Gao and Brueck: Institute of Plant Nutrition and Soil Science, Christian-Albrechts-Universität, Keil, Germany; Giese and Lin: Department of Plant Nutrition, China Agricultural University, Beijing; Gao: Key Laboratory of Vegetation Ecology, Northeast Normal University, Changchun, Jilin, China; Giese and Brueck: Department for Plant Production and Agroecology in the Tropics and Subtropics, Universität Hohenheim, Stuttgart, Germany
Title:Nitrogen availability in a grazed semi-arid grassland is dominated by seasonal rainfall
Source:Plant and Soil. Vol. 340, No. 1-2, March 2011, p. 157-167.
Publishing Information:Dordrecht, Netherlands: Kluwer Academic Publishers
# of Pages:11
Related Web URL:https://link.springer.com/article/10.1007%2Fs11104-010-0509-9#Abs1
    Last checked: 07/09/2018
    Notes: Abstract only
Keywords:TIC Keywords: Grazing; Nitrogen availability; Precipitation; Semiarid grassland soils; Soil water content; Temperature response
Abstract/Contents:"In semi-arid grassland ecosystems, soil biogeochemical processes are controlled by seasonal and inter-annual rainfall variation and temperature, which may override the long-term impact of grazers on N availability and N dynamics. In a three-year (2004-2006) case study of an Inner Mongolian grassland, we analysed time-integrated (ion-exchange resins) and instantaneous (soil mineral N extractions) inorganic N availability at three sites of varying grazing intensities and combined these data with information on soil water content (SWC), aboveground net primary productivity (ANPP) and plant N uptake. Additionally, the effects of rainfall and grazing on N-form availability (NO3--N, NH4+-N) were considered. Grazing had less impact on N availability compared to seasonal and annual rainfall distribution. One of the three study years (2004) showed a grazing effect with higher resin-N availability at the ungrazed site compared to the heavily grazed site. Inorganic N availability was low in the driest year (2005) and highest in a year of average rainfall amount and favourable distribution (2004). In general, we found a positive relationship between inorganic N availability and both plant productivity and plant N uptake. Rainfall also controlled the plant available NO3--N and NH4+-N pools; NH4+-N dominated the available inorganic N-form in times of low SWC, while the available NO3--N increased with SWC. We observed N availability and plant productivity in a temporal synchronized pattern. Increased rainfall variability and land-use practices affecting SWC will likely alter N availability dynamics (and the relation of N-forms) and, therefore, important processes of semi-arid natural grassland carbon and N cycling."
Language:English
References:34
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Giese, M., Y. Z. Gao, S. Lin, and H. Brueck. 2011. Nitrogen availability in a grazed semi-arid grassland is dominated by seasonal rainfall. Plant Soil. 340(1-2):p. 157-167.
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DOI: 10.1007/s11104-010-0509-9
Web URL(s):
https://link.springer.com/content/pdf/10.1007%2Fs11104-010-0509-9.pdf
    Last checked: 07/09/2018
    Requires: PDF Reader
https://link.springer.com/article/10.1007%2Fs11104-010-0509-9
    Last checked: 10/05/2017
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