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Vliv různých způsobů zpracování půdy na obsah vody v půdě
Bednář, Václav
This thesis deals with soil tillage and its effect on volume and mass moisture of soil. Theoretical part therefore contains information about soil and its properties that affect soil humidity, information about importance of water and water dynamics and characteristic of basic soil treatment operations. Practical part is based on parcel field trial realized at the experimental field station of Mendel University in Žabčice during years 2015, 2016 and 2017. Two basic variants of soil tillage were established: moldboard plowing and reduce tillage to a depth of 15 cm. These two variants of tillage were applied to two types of crop rotation: Norfolk crop rotation system and repetition of monoculture of spring barley. The soil samples were always taken in the barley in two terms: BBCH 30 and BBCH 61 in five depth of the soil profile up to 30 cm. In direct comparsion of tillage variants there was no statistically significant diference. Slightly higher values were measured in plowing variant, especialy in 2016. In the first term of soil sampling had plowing variant significantly higher (p <0,05) volume moisture 15,70 % compared to minimization 14,63 %. In second term had minimization higher volume moisture 10,13 % than plowing variant 10,01 %. When compared individual depths of soil sampling, the lowest moisture content was detected in depth 0–5 cm. There was also difference between tillage variants. Values of mass moisture of minimization variant was 12,87 % and plowing variant 15,78 %. Moisture differences depending on soil tillage and crop rotation was not statistically significant. Mass moisture in barely monoculture was higher in minimization 17,18 % than plowing variant 16,94 %. In norfolk crop rotation system was higher mass moisture 17,16 % in plowing variant compared with minimization 16,50 %.
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Elementární a síranová síra ve výživě řepky ozimé
Bednář, Václav
This bachelor thesis is dealing with fertilization of winter oilseed rape with sulphur in elemental and sulphate form and it examines the effect of different variants of fertilization with sulphur containing fertilizers, which were applied in various phenophases. There was founded a small-plot field trial at the experimental field station of Mendel University in Brno, situated in Žabčice near Brno in the course of years 2014 and 2015. We compared yield and oiliness of the seeds of four variants: the first variant fertilized with elemental sulphur, the second variant fertilized with elemental and sulphate sulphur, the control unfertilized variant and variant fertilized only with nitrogen. There were not proved any statistically significant effects on yields between variants, even though both variant fertilized with sulphur proved increase in yields about around 26 % compared to unfertilized variant. Compared to the variant fertilized only with nitrogen had the variant fertilized with elemental sulphur 22,5 % lower yield and the variant fertilized with elemental and sulphate sulphur 23,1 % lower yield. Statistically insignificant was also effect on oiliness. Variant fertilized with sulphur proved approximately 5 % lower yields than unfertilized variant. In comparison to variant fertilized only with nitrogen had both variants by1,9 % and 1,3 % higher oiliness.
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