Аграрный вестник Урала № 04 (146) 2016
АгрономияУДК:635.964:632.9
IMPROVE PLAINS BLUE-STEM INFESTED SWARD WITH OVERSEEDING
The plains blue-stem (Bothriochloa ischaemum) is a natural element of the hungarian flora, but due to disturbance monodominant spots may occur, which is not desirable to both grassland management and nature conservation. We have set our overseeding experiment on a 40-year-old fallow field left after a vineyard in Northern Hungarian mountains, which is utilized as a sheep pasture, to suppress this unpleasant species. We have utilized: Lolium perenne, Poa angustifolia, Bromus inermis, Dactylis glomerata. The experimental-plot size was 5 × 4 m. During the experiment (3 years) we have failed to significantly suppress the plains blue-stem at this extremely dry habitat, but managed to stop infestation. The L. perenne could be a useful component in optimal seed-mixture because of it’s initial aggressive growth rate, but only in wet years due to high demand of water. The pure seed sowing however is risky on natural habitat of plains bluestem, which has typically dry and nutrient deficient soil conditions. D. glomerata as pure seed is recommended for forage production, it’s ability of reducing the number of species on pasture is derived from it’s high productivity and prolification. Applying in seed mixture could serve nature conservation as well. P. angustifolia has suppressed the plains blue-stem and also had positive effect on species composition, therefore very useful both as pure seed or in mixture. B. inermis could not prevail under extreme conditions.
Keywords:
Bothriochloa ischaemum, overseeding, Lolium perenne, Poa angustifolia, Bromus inermis, Dactylis glomerata.
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