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DOI: | 10.1016/j.soilbio.2008.08.025 |
Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0038071708003076 Last checked: 03/21/2012 Access conditions: Item is within a limited-access website http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271195&_user=1111158&_pii=S0038071708003076&_check=y&_origin=article&_zone=toolbar&_coverDate=31-Dec-2008&view=c&originContentFamily=serial&wchp=dGLzVlB-zSkzS&md5=0a08a100129813d6190d09203255bb3f/1-s2.0-S0038071708003076-main.pdf Last checked: 03/21/2012 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Rasmussen, Jim;
Gjettermann, Birgitte;
Eriksen, Jørgen;
Jensen, Erik Steen;
Høgh-Jensen, Henning |
Author Affiliation: | Rasmussen, Gjettermann, and Høgh-Jensen: Department of Agricultural Science, Faculty of Life Sciences, University of Copenhagen; Rasmussan and Eriksen: Department of Agroecology and Environment, Faculty of Agricultural Sciences, Aarhus University; Jensen: Biosystems Department, Risø DTU, Technical University of Denmark, Denmark |
Title: | Fate of 15N and 14C from labelled plant material: Recovery in perennial ryegrass-clover mixtures and in pore water of the sward |
Source: | Soil Biology & Biochemistry. Vol. 40, No. 12, December 2008, p. 3031-3039. |
Publishing Information: | Pergamon |
# of Pages: | 9 |
Keywords: | TIC Keywords: Biomass; Carbon; Organic matter; Dry weight; Leaching; Lolium perenne; Nitrogen losses; Percent living ground cover; Percolation; Soil texture; Strength testing; Trifolium
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Abstract/Contents: | "The belowground C and N dynamics leading to organic and inorganic N leaching from perennial ryegrassclover mixtures are not well understood. Based on the hypothesis that four different plant materials would degrade differently, a 16 months field experiment was conducted to determine (i) the source strength of labelled plant residues in dissolved inorganic N (DIN) and dissolved organic N (DON) in pore water from the plough layer, and (ii) the plant uptake of organically bound N. Litterbags containing 14C- and 15N-labelled ryegrass or clover roots or leaves were inserted into the sward of a ryegrass-clover mixture in early spring. The fate of the released 14C and 15N was monitored in harvested biomass, roots, soil, and pore water percolating from the plough layer. No evidence of plant uptake of dual-labelled organic compounds from the dual-labelled residues could be observed. N in pore water from the plough layer during autumn and winter had a constant content of dissolved organic N (DON) and an increasing content of dissolved inorganic N (DIN). A positive correlation between aboveground clover biomass harvested in the growth season and total-N in pore water indicated that decaying roots from the living clover could be a major source of the 10 kg N ha-1 being lost with pore water during autumn and winter. The presence of 15N in pore water shifted from the DON fraction in autumn to the DIN fraction in late winter, with strong indications that 15N originated from the living ryegrass. However, 15N in pore water originating from plant residues only constituted 1.5% of the total dissolved N from the plough layer." |
Language: | English |
References: | 45 |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Rasmussen, J., B. Gjettermann, J. Eriksen, E. S. Jensen, and H. Høgh-Jensen. 2008. Fate of 15N and 14C from labelled plant material: Recovery in perennial ryegrass-clover mixtures and in pore water of the sward. Soil Biol. Biochem. 40(12):p. 3031-3039. |
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| DOI: 10.1016/j.soilbio.2008.08.025 |
| Web URL(s): http://www.sciencedirect.com/science/article/pii/S0038071708003076 Last checked: 03/21/2012 Access conditions: Item is within a limited-access website http://pdn.sciencedirect.com/science?_ob=MiamiImageURL&_cid=271195&_user=1111158&_pii=S0038071708003076&_check=y&_origin=article&_zone=toolbar&_coverDate=31-Dec-2008&view=c&originContentFamily=serial&wchp=dGLzVlB-zSkzS&md5=0a08a100129813d6190d09203255bb3f/1-s2.0-S0038071708003076-main.pdf Last checked: 03/21/2012 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b2217194 |
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