Przydatność Festuca pratensis i Trifolium pratense do podsiewu łąki na glebie organicznej
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Studies were carried out in 2003–2007 on the meadow with the community of Festuca rubra, on the rot soil proper. In the meadow experiment two factors were studied – the dose of nitrogen (0, 60, 120, 180 kg · ha–1) and the grass-leguminous mixtures of seeds, with different participation of Festuca pratensis and Trifolium pratens1 e (1 – without sowing – control, 2 – Festuca pratensis – 100% – 30 kg · ha–1), 3 – Festuca pratensis – 70% + Trifolium pratense – 30%, 4 – Festuca pratensis – 50% – Trifolium pratense – 50%, 5 – Festuca pratensis – 30% + Trifolium pratense – 70% 6 – Trifolium pratense – 100% – 18 kg · ha–1). Analysis of the floristic composition of sward showed that the proportion of Festuca pratensis increased when seed quantity and nitrogen dose were enlarged, but there was no such regularity in the case of Trifolium pratense. Its share declined independently of the factors of the experiment in the subsequent study years. Between used combinations of experimental factors, the most productivity in terms of dry matter yield were objects sawed with mixture – 70% Festuca pratensis and 30%, Trifolium pratense and Trifolium pratense alone, fertilized with nitrogen doses of 120 and 180 kg · ha–1. Feed of individual objects characterized by similar chemical composition. The concentration of majority of analyzed elements (N, P, K, Ca, Mg, and Cu, Zn, Fe, Mn) corresponded to the level recommended for a good feed. Only the content of zinc and copper fluctuated below the norm, but phosphorus and potassium – it greatly exceeded.
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