The role of cultivars mixtures of Lolium perenne and Trifolium repens in pasture overdrilling
Piotr Goliński
pgolinsk@up.poznan.plKatedra Łąkarstwa, Akademia Rolnicza w Poznaniu (Poland)
Stanisław Kozłowski
Katedra Łąkarstwa, Akademia Rolnicza w Poznaniu (Poland)
Abstract
In the years 2000–2001, in an experiment established on a pasture situated on a muck soil site, the authors analysed the effectiveness of overdrilling measured by the share of species overdrilled in the sward, yield and herbage quality in relation to the following applied cultivars and cultivar mixtures of Lolium perenne: Anna, Barylou, Anna + Maja, Barylou + Barlano + Barezane and Trifolium repens: Barbian, Barbian + Alice + Haifa. Cultivar mixtures were developed on the basis of specificity of their biological and chemical properties which determine yield and herbage quality. Overdrilling was carried out with the Vredo seeder equipped with a disk system cutting sod. Two methods of sod preparation for overdrilling were applied: low mowing (3 cm) and spraying with Reglone. The experiment was established in a random block design on 20 m2 plots on which pasture utilization was simulated by collecting 4–5 regrowths. The performed experiments allowed concluding that it is justifiable to apply cultivar mixtures of Lolium perenne and Trifolium repens. The mixture of Barylou + Barlano + Barezane cultivars increased both the proportion of Lolium perenne in the sward and its yield, especially in the year of overdrilling, and contributed to the improvement of sward fodder value. The mixture of Anna + Maja cultivars did not guarantee any significant influence on sward botanical composition of the overdrilled pasture, although it increased its yield. The replacement of the Barbian cultivar by a mixture of Trifolium repens cultivars Barbian + Alice + Haifa increased the share of this species in the sward of the overdrilled pasture, which had a positive influence on sward chemical composition. The application of cultivar mixtures of Lolium perenne and Trifolium repens increased the effectiveness of pasture overdrilling by improved stability of sward botanical composition. The increased proportion of the overdrilled components in sward had a positive impact on pasture productivity and herbage quality, mainly with regard to protein, lignin and magnesium content.
Keywords:
Lolium perenne, Trifolium repens, cultivars mixtures, pasture overdrillingReferences
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Authors
Stanisław KozłowskiKatedra Łąkarstwa, Akademia Rolnicza w Poznaniu Poland
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Copyright (c) 2003 Piotr Goliński, Stanisław Kozłowski
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