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| DOI: | 10.1016/j.soilbio.2004.08.012 |
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| Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0038071704003189
Last checked: 03/27/2012
Access conditions: Item is within a limited-access website
http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271195&_user=1111158&_pii=S0038071704003189&_check=y&_origin=article&_zone=toolbar&_coverDate=31-May-2005&viewc&originContentFamily=serial&wchp=dGLzVlB-zSkzk&md5=d903f9d482debd7bbe616d477fea0732/1-s2.0-S0038071704003189-main.pdf
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| Publication Type:
| Refereed |
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| Author(s): | Personeni, E.;
Lüscher, A.;
Loiseau, P. |
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| Author Affiliation: | Personeni and Loiseau: Grassland Ecosystems Research Group, Agronomy Unit, INRA, Clermont-Ferrand, France; Lüscher: Agroscope FAL Reckenholz, Swiss Federal Research Station for Agroecology and Agriculture, Zurich, Switzerland |
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| Title: | Rhizosphere activity, grass species and N availability effects on the soil C and N cycles |
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| Source: | Soil Biology & Biochemistry. Vol. 37, No. 5, May 2005, p. 819-827. |
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| Publishing Information: | Oxford, United Kingdom: Pergamon Press |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Carbon cycle; Chemical soil analysis; Comparisons; Dactylis glomerata; Evaluations; Festuca ovina; Lolium perenne; Nitrogen availability
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| Abstract/Contents: | "We examined whether grass species and soil nitrogen (N) availability could enhance Carbon (C) and N turnover during root litter decay in grassland. Three species with increasing competitiveness (Festuca ovina, Dactylis glomerata and Lolium perenne) were grown at two N fertiliser levels in an undisturbed grassland soil, in which soil organic fractions derived for the last 9 years from Lolium root litter which was 13C-depleted. During the subsequent experimental year, the C turnover was calculated using the respective δ13C values of the old and new C in the root phytomass, in two Particulate Organic Matter (POM) fractions above 200 μm and in the lightest part of the aggregated soil fraction between 50 and 200 μm. Soil N availability was monitored during the regrowth periods with ion exchange resins (IER). The C decay rates of each particle size fraction were calculated with a simple mechanistic model of C dynamics. The N mineralisation immobilisation turnover (MIT) was characterised by dilution of 15N-labelled fertiliser in the N harvest The C:N ratio and the residence time of C in the fractions decreased with particle size. The presence of a grass rhizosphere increased the decay rate of old C. Accumulation of new C in particle size fractions increased with species competitiveness and with N supply. Species competitiveness increased C turnover in the aggregated fraction, as a result of greater accumulation of new C and faster decay of old C. Fertiliser N increased N turnover and C mineralisation in the SOM. Species competitiveness decreased soil NO3--N exchanged with the IER and increased dissolved organic C (DOC) content. The nature of the current rhizosphere is thus an important factor driving C and N transformations of the old root litter, in relation with grass species strategy. Plant competitiveness may stimulate the C and N turnover in the more evolved SOM fractions in a similar way to the mineral N supply." |
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| Language: | English |
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| References: | 30 |
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| Note: | Equations
Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Personeni, E., A. Lüscher, and P. Loiseau. 2005. Rhizosphere activity, grass species and N availability effects on the soil C and N cycles. Soil Biol. Biochem. 37(5):p. 819-827. |
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| DOI: 10.1016/j.soilbio.2004.08.012 |
| Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0038071704003189
Last checked: 03/27/2012
Access conditions: Item is within a limited-access website
http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271195&_user=1111158&_pii=S0038071704003189&_check=y&_origin=article&_zone=toolbar&_coverDate=31-May-2005&viewc&originContentFamily=serial&wchp=dGLzVlB-zSkzk&md5=d903f9d482debd7bbe616d477fea0732/1-s2.0-S0038071704003189-main.pdf
Last checked: 03/27/2012
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2217194 |
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