|
|
Restoration of grassland ecosystems in present restoration ecology
Prach, Karel
The following conclusions have been drawn. (a) Both degradation and restoration seem to be faster on nutrient-rich than on nutrient-poor sites but the latter may be easier encroached by woody species. (b) Restoration is difficult if water and/or nutrient regimes have changed during degradation. (c) Restoration is easier if target species still occur either at the site itself or in its close surroundings. (d) Some restoration measures can be profitable for one group of organisms and detrimental for some others, thus consultancy among experts is needed prior to the start of the restoration. (e) Long-lasting management and monitoring must be guaranteed. Obstacles to successful restoration are also reviewed. Finally, the need of cooperation between scientists and practitioners is emphasised.
|
|
|
The effect of management type on greenhouse gas emissions from grasslands
HAJŠMANOVÁ, Klára
This work represents the grant application for project dealing with the influence of the type of management and fertilization on greenhouse gas emissions of (CO2, CH4, N2O) from grasslands, namely grazed pastures, mown and mulched meadows at an organic farm Borová near České Budějovice. This project evaluates the diurnal gas flux dynamics affected by application of different nitrogen fertilizers (i.e. NH4+, NO3- and manure).
|
|
|
The influence of ecological conditions, management and stand botanical composition on growth of slender speedwell (Veronica filiformis Smith) in grasslands
Kobes, M. ; Šerá, Božena ; Novotná, R. ; Gajdová, Iveta
Slender speedwell (Veronica filiformis) is a non-native and invasive species of grassland. The aim of the study was to test the ability of the Slender speedwell growth in differently managed grasslands (mowing, mulching, grazing). After a two-year experiment, a statistically significant influence on the management application among growth of Slender speedwell was found (F = 14.462, p <0.001). The best survival was found in one-year mulched vegetation (dominant Deschampsia caespitosa) in the Zhůří plot and in hay and pasture crops in the V. Chuchelec plot (dominant Festuca pratensis, Lolium perenne, Trisetum flavescens, Poa pratensis, Dactylis glomerata and Phleum pratense). Slender speedwell can be well applied in permanent grasslands higher, colder and wetter conditions with management as mowing, grazing or mulching.
|
|
|
Sustainable approaches to small-area grassland and barren management with respect to flora and insect diversity
Vymyslický, T. ; Fabšičová, Martina ; Musil, Z.
This study is devoted to the determination of sustainable ways of increasing flora and insect diversity in meadows through the establishment of barren sites and fallows, which help many ephemeral plant species to reproduce from the soil seed bank. We tested the optimal time for the duration of a fallow and it seems to be 3-5 years. Significant differences were observed in the number of species and their cover between nutrient-poor and nutrient-rich areas.No massive occurence of invasive and expansive species was found. In the warm eastern part of the Podyjí NP we found plant species that had been missing there for many years.
|
guest ::
