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Soil nutrient heterogeneity and competitive ability of three grass species (Festuca ovina, Arrhenatherum elatius and Calamagrostis epigejos) in experimental conditions

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Abstract

We studied the effects of differences in root growth and nutrient pool on the competitive ability of Festuca ovina (short grass), Arrhenatherum elatius and Calamagrostis epigejos (tall grasses) grown in monocultures and in mixtures of homogeneous and heterogeneous environments during two growing seasons. Analysis of variance revealed a significant effect of plant species on nutrient concentrations in above-ground biomass and of substrate type on contents of N, K, Ca, Mg in biomass. The ANOVA also confirmed the significant effect of competitive environment on the concentration of N, K in above-ground biomass. In heterogeneous environments, both tall grasses (in competition with F. ovina) were able to produce more roots in the nutrient-rich patches and to accumulate more nitrogen in plant tissues, which was associated with higher yield of their above-ground biomass. Thus, the relative competitive ability for nutrients of both tall grasses was higher than that of F. ovina. This competitive ability of A. elatius to C. epigejos increased in heterogeneous treatments.

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Authors and Affiliations

  1. Institute of Botany, Department of Ecology, Academy of Sciences of the Czech Republic, Poříčí 3b, CZ-60300, Brno, Czech Republic

    Ivan Tůma, Petr Holub & Karel Fiala

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  1. Ivan Tůma
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  2. Petr Holub
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  3. Karel Fiala
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Correspondence to Ivan Tůma.

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Tůma, I., Holub, P. & Fiala, K. Soil nutrient heterogeneity and competitive ability of three grass species (Festuca ovina, Arrhenatherum elatius and Calamagrostis epigejos) in experimental conditions. Biologia 64, 694–704 (2009). https://doi.org/10.2478/s11756-009-0067-x

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