Mimokořenová aplikace síry v máku setém

The purpose of this bachelor thesis was a study of effect of a foliar application of sul-phur in the opium poppy (Papaver somniferum). Final thesis deals with the assessment of the effect of different forms of sulphur on the yield parameters of the poppy. The sulphur forms were applicated in foliar way by commercial fertilizers. The experiment was realized in the form of a small-plot year-long experiment in ŠPZ Žabčice in year 2017. The foliar application of thiosulphate sulphur (fertilizers YaraVita Thiotrac 300, SK sol, Folit Thiosulf), elementary sulphur (Ferti MK S 800 SC, Folit sulphur) and polysulfide sulphur (Sulka K, Sulka H) were used in this experiment. The application was performed in phase of 10th leaf. Two weeks after the application of fertilizers a nutritive status of plants was evaluated by an inorganic analysis. Higher amount of sulphur correlated with higher amount of nitrogen. The biggest influence on the yield was proved after the application of fertilizer SK sol. In this variant the seed yield was increased by 7.2 % in comparison with the unfertilized control. On the contrary the smallest influence on the seed yield had the fertilizer Sulka K with an increase by 3 %