National Repository of Grey Literature 165 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Efekt snížení dávky dusíku při použití hnojiv s inhibitory
Brabcová, Jana
This work was focused on the use of nitrogen fertilizers with inhibitors in full and reduced doses, which was supposed to simulate the achievement of one of the objectives of the Green Deal. The experiment took the form of a one-year small-plot experiment with winter wheat in Žabčice near Brno. The following variants were included in the experiment: 1. mixture of urea + ammonium sulfate (control), 2. Alzon neo-N (urea containing urease and nitrification inhibitor), 3. mixture of Alzon neo-N and Lovogran IN (ammonium sulfate with nitrification inhibitor) and 4. a mixture of Alzon neo-N and Lovogran IN in a reduced dose of 20%. Winter wheat (Triticum aestivum) was chosen as the test crop, for which the yields and quality parameters of the grain were monitored (bulk weight, nitrogen content, gluten content and Zeleny test value). The mineral nitrogen content in the soil was also monitored. The addition of inhibitors did not have a statistically significant effect on yield and grain quality. A statistically significant decrease in values occurred only in the variant with a reduced dose of fertilizer compared to the non-reduced variant, namely in the content of N-substances, gluten content and the value of the Zeleny test (sedimentation value). When comparing the variant with a reduced dose of nitrogen to the standard by fertilizing without inhibitors, no significant differences were found. Fertilizers with inhibitors can therefore ensure an unreduced yield of adequate quality even when a reduced dose of fertilizer is used. The results of the Nmin analysis proved the effectiveness of the inhibitors on the mineral nitrogen content in the soil, especially the influence of the urease inhibitors. The variant with a higher content of urease inhibitor (variant 2) showed a lower amount of ammonium nitrogen and at the same time a lower amount of total Nmin compared to the variants in the mixture in full and reduced dose (variants 3 and 4).
Stanovení bílkovin u pšenic z konvenčního a ekologického pěstování a jejich vliv na kvalitu zrna
Sedláčková, Anna
The main aim of this diploma thesis was to determine selected signs of baking quality in selected trials from organic and organic agriculture of wheat (Triticum aestivum L.) in the season of 2020/2021. This annual trial included combination of twenty varieties and new breedings of wheat sown in two different locations, Weikendorf (organic agriculture) and Dörfles (ecological agriculture). There was evaluated ifestation by Blumeria graminis, Septoria tritici, Puccinia striiformis and Fusarium graminearum during the 2021 vegetation. Subsequently was determined the yield from individual trials (dt.ha-1) and laboratory analyzes were carried out, starting with the evaluation of flour yield using Quadrumat Junior and SRC-CHOPIN 2, NIR, SDS and Zeleny sedimentation test, alveographic and extensographic evaluation, and finally evaluation using GlutoPeak. The year 2020/2021 was characterised by frequent and high rainfall totals during sowing and harvesting. Meteorological conditions during the year, local influences and different agrotechnical procedures played a significant role in the formation of technological quality of the grain. The limit of 12,5 % of protein set by Austria was met at the location Weikendorf (conventional agriculture) by all varieties and new breeding except variety `Campesino`. At the location Dörfles (organic agriculture) was this limit not met by any of chosen varieties and new breedings. The results of determining the other technological parameters showed significant differences between the quality of the harvest in favor of conventional agriculture. It was made a series of correlations between selected quality parameters. In particular, that grain from conventional and organic farming can differ significantly even from the point of view of evaluating the relationships between selected quality parameters.
Hodnocení kvalitativních parametrů zrna pšenice ozimé u odrůd z víceletých pokusů
Kužílková, Ilona
The aim of the thesis is to deal with the problematics of wheat grain quality assessment. In the literary research the anatomical structure and chemical composition of wheat grain is described. Furthermore, wheat grain baking quality requirement are characterized. The quality parameters are described in more details. In requirements, this thesis deals with the requirements of varieties registration. The experimental part of this thesis was conducted at two locations in a small-plot field experiment at the Field Experimental Station MENDELU in Žabčice. It was multi-years trial that was carried out in three growing seasons (2019/2020, 2020/2021 a 2021/2022). There were fifteen wheat varieties of a different quality evaluated. The yield of individual varieties was measured and then the baking quality parameters were evaluated. The evaluated quality parameters included: bulk density, falling number value, sedimentation value, nitrogenous substances content and wet gluten content. All quality parameters were influenced by the course of weather conditions throughout the year and also by the genotype of the variety. The content of nitrogenous substances and wet gluten was also influenced by the habitat conditions. At the same time, it was possible to observe interaction between individual factors. The highest values of quality parameters were found in varieties Butterfly, Bohemia and Genius, however the lowest values in varieties LG Orlice, RGT Sacramento and Steffi. The highest yields were achieved by varieties LG Orlice, Steffi and RGT Sacramento, while Bohemia and Butterfly obtained the lowest yields. Varieties like Balitus, LG Dita and Pirueta can be recommended for baking purposes.
Transport and thermophysical data for thermic sanitation calculation of agricultural seeds
Vávra, Dan ; Brummer, Vladimír (referee) ; Juřena, Tomáš (advisor)
The bachelor's thesis focuses on properties that are important for thermal sanitation. Commonly used seed treatment methods are summarized in the theoretical part. Furthermore, seeds‘ transport and thermo–physical properties are written out and described. To the present day, the properties of wheat seeds have been determined, while there are fewer publications for pea seeds. The available properties were determined by research for wheat and pea seeds. Furthermore, the experimental procedures for obtaining wheat properties were verified and then the procedures were applied to pea seeds. In the experiments, values were obtained for porosity, bulk density, true density, static angle of repose and specific heat capacity for certain humidity. The results are written out with total measurement uncertainties. The values of properties were discussed.
The use of humine preparations at the winter wheat
ŠVEC, Jakub
The diploma thesis deals with the use of humic preparations in winter wheat (Tri-ticum aestivum). The experiment was based on a family farm with two varieties of winter wheat. These were varieties from the Lima Grain company. The varieties were LG Mocca and LG Magirus. In the experiment, 3 different dosage variants of Blackjak were compared against the control variant. The dose of the product was graduated in half a liter per hectare, i.e. variant No. 1: 0.5 l*ha-1, No. 2: 1 l*ha-1, No. 3: 1.5 l*ha-1. In the case of the LG Mocca variety, there was an increase in profits in all variants, from which it can be concluded that even the application of 0.5 l*ha-1 is advantageous. However, the highest increase in profits was for variant No. 3, where the increase in profits was CZK 3,087. For the LG Magirus variety, these results were not so clear. Variant No. 1, where 0.5 l*ha-1 was applied, came out with a lower profit than the control variant. The highest increase in profits was for variant No. 3, where the increase was CZK 1,554.
Využití vybraných komponentů rostlinného původu ve výživě ryb
Zugárková, Iveta
The main aim of this Bachelor´s thesis was to create a literary review on the use of selected plant components in fish nutrition. Part of the review contains data on fish bre-eding and nutrition, nutritional requirements regarding the nutrients and customization of fish food. The second part of the Bachelor´s thesis presents a draft on the methodo-logy of a feeding test. Both scaled and mirror forms of common carp (Cyprinus carpio L.) will be used in this test and fed different crops: feeding and low-phosphate wheat, feeding and pearl barley. The corps will be processed into granule to make the food intake and utilization easier. The test will star in May 2016 and be carried out in the recirculation system of the aquarium room at the Department of fishery and hydrobiolo-gy of the Mendel University in Brno. The aims of the test is to evaluate the production effectiveness of used crops, including their influence on the chemical composition of fish tissues and selected parameters of internal environment of fish bodies. The tested crop species were chosen based on the data on the influence of various crops on the phosphorus level reductions in fishponds. Because the plant food for carp represents the most expensive part of carp breeding, there is ongoing research for finding economically and nutritionally suitable food.
Průnik obsahu mykotoxinů ze zrna obilovin do hotového výrobku a dopad na zdraví člověka
Machálková, Monika
This thesis deals with the issue of mycotoxins, which are important pathogens of many agricultural crops and may pose a high health risk to humans and livestock. It contains an overview of the most important mycotoxins their producers and mycotoxicoses. The main focus of this thesis is the occurrence of mycotoxins in cereals and the effect of processing it on their content. The experimental part focuses on monitoring the content and the penetration of deoxynivalenol and zearalenone in winter wheat from grain to bread. We examined a total of 10 samples of treated and 10 samples of untreated variants of winter wheat. For each sample grain, flour and bread were examined for DON and ZEA content and all tested samples were positive for DON and ZEA. None of the examined samples exceeded or even approached the legislative limits.

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