The effect of soil water regime on vigour of species of permanent grasslands
1997
Vesela, M. | Mrkvicka, J. (Ceska Zemedelska Univ., Prague-Suchdol (Czech Republic). Agronomicka Fakulta)
Grassland sites were divided into five ecological stages according to water regime: xerophytic, mesoxerophytic, mesophytic, mesohygrophytic and hygrophytic. Average dominance and presence was calculated on each stage of hygrosery in 102 species. 10 most vigour species were determined for each ecological stage according to the indices of occurrence. Xerophytic sites do not allow existence of quality cultural species. This stage suits the best to narrow-leaved tall fescue species. On mesoxerophytic stage two grass species are of greatest vigour and of fully distinct requirements for the content of available nutrients. Arrhenatherum elatius is dominant in good soils, whereas Nardus stricta, Festuca ovina prevail in oligotrophic soils. Festuca rubra grows well here. Highest index of occurrence in mesophytic to eutrophic site in oligotrophic soils have: Nardus stricta and Agrostis tenuis, while Alopecurus pratensis, Festuca pratensis and Dactylis glomerata are dominant in mesotrophic sites. Mesohygrophic site with reduced soil aeration is dominated by low sedges and other unsuitable herbs. In soil of hygrophytic sites dominate high sedges (Magnocariceta) and other indicators of strong waterlogging.
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