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The manifestation certified and farm seed at selected potato varieties
PÁVEK, Miroslav
The main aim of this thesis was to evaluate the manifestation of certified seed and farm seed in selected varieties of potatoes. The experiment started in 2015 on the estate of Agricultural faculty of the University of South Bohemia. Four varieties (Magda, Adéla, Laura, Satina) with different vegetation period were planted. The certified seed was used in step A and the farm seed was divided according to size and it was tested for the presence of virus diseases. It was established 32 plots. The harvest of testing plots was on 29th September 2015. Each plot was harvested into the separate bag. Then the size sorting was done and individual tubers were counted. Based on measured values were determined the tuber yield, the yield of table potatoes, the content of the starch and the average weight per tuber. It was also observed the number of emerged plants of each variety and the number of stems per plant. The obtained results show that the use of farm seeds in the first year doesn´t have to mean an immediate decline in yield but varieties Magda, Adéla and Satine even increased their average yield about 9 t/ha. Only the yield of variety Laura was higher in certified seed by 4 t/ha. It wasn´t proved the impact of the chosen seed to the content of starch.
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Reaction of selected varieties of potatoes on the amplion of foliar fertilizers
KULÍK, Jan
The aim of the experiment was to evaluate the reaction of chosen potato varieties to the application of leaf fertilizers. The speed of their action and, together with combination with other interventions (common application with fungicides), and also the economics of their application belong among the advantage of leaf fertilizer application. In 2012 and 2013 there was an experiment established in 380 m above the sea level. In this experiment the effect of application of urea solution, Lignohumate, and Energen Fructus was evaluated in the varieties with a different length of vegetation period Magda very early, Adéla - early, Laura and Satina semi early and Bionta - late. The rate of sprouted plants, the yield of tubers, the proportion of tubers of consumer size, the number of tubers under cluster, an average weight of one tuber, the number of stems per a plant, and the content of starch were evaluated in these plants. It was found out from the results that in 2012 Magda and Satina varieties reacted with an increased average weight of one tuber after the application of all leaf fertilizers. The effect of Lignohumate was the most positive in this year; it increased an average weight of one tuber in Magda, Adéla, and Satina varieties. In comparison to that, in the second year of the experiment there was a positive reaction to additional fertilizing with Lignohumate, Urea, and Energen Fructus, leading to the increase of an average weight of one tuber in Magda, Adéla, Laura, and Bionta varieties. In 2013 there was the highest influence on an average weight of one tuber caused by the use of Urea, namely in Magda, Adéla, Laura, and Bionta varieties.
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