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Evaluation of foliar feeding effect on starch and protein yield in potatoes
KAKOS, Michal
The aim of the study was to evaluate the effect of foliar nitrogen nutrition on yield and starch content and protein varieties of potatoes for starch with different length of the growing season. The literary review contains a general introduction to the topic and furthermore there is a summary of the existing development and production of potatoes both in the Czech Republic and abroad. In 2015 it was established one-year field experiment, where the effect was evaluated by 8% urea solution in variations in one application time and application in terms of solution 2 compared to the variant without the application of the urea solution. There were three sorts of potatoes with different vegetation period. It was a medium late variety Zuzanna and semi-late to late varieties Eurogrand and Eurostarch . At very specific 2015 to both precipitation and temperature be best evaluated albeit to a small extent, by the urea solution in the first term. Applications for the 2nd deadline had no significant effect on the production of starch and nitrogen compounds .
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Reaction of selected varieties of potatoes for processing into starch at foliar application of fertilizers
ŠANDEROVÁ, Šárka
The aim of the study was to evaluate the impact of the application of foliar fertilizers on starch production at potato growing. The literary review contains a general introduction to the topic and furthermore there is a summary of the existing development and production of potatoes both in the Czech Republic and abroad. The results were obtained from the one-year field experiment, during which two potato varieties with different lengths of the growing seasons were planted. It was a medium-early ripening variety Priamos and the late variety Dominator. In 2014 the one-year field experiment was established, during which the effect of the application of the solution of urea, Lignohumate and Energen Fulhum was evaluated compared with the variant without the application of foliar fertilizers. The tuber yield, number of tubers per plant, weight of tubers per plant, average weight of 1 tuber, starch yield and starch content were evaluated. The annual results indicated that the foliar fertilizers had on this year the positive effect on tuber yield, but the impact on the starch yield and content has not been confirmed. Both monitored potato varieties responded positively to the application of Lignohumate - by tuber enlarging. The Priamos Variety had an average tuber yield of 50.3 t/ha and the average starch content of 20.3%. In contrast the variety Dominator had the average tuber yield of 59.8 t/ha but lower starch content, in the average by 17.6%.
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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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The influence of leaf fertilizers at potato yield
KULÍK, Jan
The aim of this thesis is to evaluate the influence of leaf fertilizers at potato yield. The main advantage of leaf nutrition is speed of an action on a plant, possible combination with other interventions (application of fungicides) and economy of use. Leaf nutrition promotes tuber yield and quality, mainly in their tuber set and poor growth conditions. It is important to perceive leaf nutrition as a suplement nutrition because it is no substitute for root nutrition. The field experiment was established on the land of the University of South Bohemia in České Budějovice in 2011. There were used selected varieties of potatoes with different growing season. Very early variety Magda, early variety Adéla, semi-early varieties Laura and Satina and serotinous variety Bionta. The experiment was comprised of four variants and in four replications. There were used liquid solution of urea, Lignohumate and Lignohumate with NPK for fertilizer of variants 1, 2 ,3. Control variant was without aplication of fertilizer. There were evaluated proportion of grow-up plants, tuber yield, proportion of ware size tubers, the number of tubers per plant, the average weight of one tuber, the average weight of ware size tubers and starch content. It was found out using of liquid solution of urea increased tuber yield of all selected varieties. The highest yield of varieties Adéla and Laura was achieved by application of Lignuhumate, the highest yield of varieties Satina a Bionta after using of liquid solution of urea. Very early variety Magda was not too responsive to application of leaf fertilizers excep using of liquid solution of urea.
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