Wpływ metod zwalczania mniszka pospolitego (Taraxacum officinale) na względną jakość pokarmową siana łąkowego

The aim of this work was the examination the effect of selected methods of Taraxacum officinale control on the hay quality from grassland. The field experiment was conducted in the years 2007–2009 on a meadow in śelków near Siedlce (geographical coordinates: 52º08' N and 22º11' E). It was conducted in randomized blocks with three replications. There were two experimental factors, mechanical control methods by involving of Taraxacum officinale and cutting up the plants and four selected herbicides (Rancho 242 EC, Bofix 260 EC, Starane 250 EC and Mniszek 540 SL). Plot area was 9 m2. In each growing season three cuts were harvested. Immediately after cutting the green matter was weighted and was taken 0.5 kg sample of green matter, in order to botanical – weight analyze. Then the plant material has been dried and subjected to chemical analysis. The study results were used to evaluate feed from permanent meadows by Linn-Martin test. The highest values of RFV determining the relative nutritive value of forage harvested from control objects throughout the whole period of the experiment. It caused in the classification of that feed in the second of the fifth grades. Silage feed value obtained from other objects which were used both chemical and mechanical control methods of Taraxacum officinale was slightly lower compared to the control object and was in third grade quality.

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