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Hodnocení produkční schopnosti jitrocele kopinatého pro pícní využití
Valigurová, Jana
Dycotyledonous herbs for forage use are more often being used in agriculture. This diploma thesis focuses on one of the variants, namely ribwort plantain, which is considered a high-quality fodder and whose main feature is the ability to withstand abiotic stresses and provide high forage production even in the dry season. With the increasing frequency of drier periods, ribwort plantain has got great potential to become a more grown crop. Therefore were cultivated varieties of ribwort plantain, which provide higher yields and are more resistant to adverse climatic conditions than common flatweed type. The practical part of this work is divided into two parts. The first part of the experiment was grown in sand rolls, where the production of rootstock biomass of ribwort plantain (cv. Tonic) was compared with four other species: chicory (cv. Puna II), red clover (cv. Callisto), festuca arundinacea (cv. Kora) and alfalfa (cv. Zuzana). This experiment was set up in September 2019 and the total lenght of vegetation was 69 days, the experiment was fertilized twice during the vegetation. Leaves heights of all species were written down during the vegetation. After the end of the vegetation there was evaluated total lenght of the roots, the maximum depth of the roots and the length of the roots based on their thickness. These parameters were evaluated via WinRHIZO program. The maximum of root depth (18,2 cm) and root length in total (2 032 cm) were demonstrated for Tonic plantain. The second part of the experiment focused on the evaluation of the production capacity and the production of the root biomass of ribwort plantain took place on experimental plots at the Forage station in Vatín. This experiment was set up in June 2019 in three variants, where three following species where sown: ribwort plantain (cv. Libor), chicory and a mixture of plantain, chicory, cocksfoot, perennial ryegrass, meadow fescue, Kentucky blue grass, timothy, white clover, birdsfoot trefoil. A statistically significant difference was found only in the dry matter yield and the dry matter content, where lower values were written down for plantain Libor than for the grass mixture (dry matter yield lower by 0,45 t.ha-1, dry matter content in the first mowing lower by 5,06 %, in the second mowing lower by 2,22 %). There was also evaluated the content of crude protein (15,87 %) and fibre (ADF 22,58 % and NDF 26,77 %). In the spring 2020 was evaluated the production of root biomass like in the first part of the experiment using the WinRHIZO program. In plantain Libor there was found higher density of rooting in the upper layer of the soil (10,2 cm.cm-3) than in chicory (3,1 cm.cm-3).
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