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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 |
Publication Type:
| 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
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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 |
| MSU catalog number: b2212822 |
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