biologia plantarum

International journal on Plant Life established by Bohumil Nìmec in 1959

Biologia plantarum 49:133-136, 2005 | DOI: 10.1007/s10535-005-3136-1

Effects of competition and N and P supply on carbon isotope discrimination and 15N-natural abundance in four grassland species

J. T. Tsialtas1,*, M. T. Kassioumi1, D. S. Veresoglou1
1 School of Agriculture, Laboratory of Ecology and Environmental Protection, Aristotle University of Thessaloniki, Thessaloniki, Greece

The effect of interspecific competition and element additions (N and P) on four grassland species (Poa pratensis, Lolium perenne, Festuca valida, Taraxacum officinale) grown under field conditions was studied. Two grasses (L. perenne, F. valida) grown in monoculture (absence of competition) showed lower carbon isotope discrimination (Δ13C) and enriched δ15N values. Nitrogen addition (as urea) had inconsistent effects on species Δ13C while caused enrichment of δ15N of P. pratensis and F. valida but strong depletion of δ15N of T. officinale. Phosphorous had no significant effect on Δ13C but depleted δ 15N of all species.

Keywords: fertilization; Festuca valida; grasses; Lolium perenne; Poa pratensis; Taraxacum officinale; water use efficiency
Subjects: carbon isotope discrimination (δ13C, Δ13C); competition, interspecific; Festuca valida; Lolium perenne; medicinal plants; natural abundance of carbon, δ13C; natural abundance of nitrogen, δ15N; Poa pratensis; Taraxacum officinale; water use efficiency

Received: October 23, 2003; Accepted: June 21, 2004; Published: March 1, 2005  Show citation

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Tsialtas, J.T., Kassioumi, M.T., & Veresoglou, D.S. (2005). Effects of competition and N and P supply on carbon isotope discrimination and 15N-natural abundance in four grassland species. Biologia plantarum, 49(1), 133-136. doi: 10.1007/s10535-005-3136-1
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