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Vybrané charakteristiky z biologie významných druhů z čeledi miříkovitých
Gregorová, Vladislava
ABSTRACT The objective of this study was to compare the germination of cultural and weed variety of selected species of the family Apiceae. There were selected species: Daucus carota and Pastnaca sativa. For this research were selected three stocks of Carrot: Daucus carota -- wild, Daucus carota -- seeded from stored root in the garden - variety Olympus and Daucus carota -- originated from the propagation crop species -- variety Cider. For Pastinaca sativa were selected two populations: Pastinaca sativa - from the propagation crops and Pastinaca sativa - wild. For analyzed species the germination of achenes was determined under laboratory conditions. Average germination detected in Daucus carota - wild was 51%, for carrot Olympus 74% and for carrot Cider 89%. Average germination detected in Pastinaca sativa -- wild was 2%, for long white parsnip varieties 87%. The final germination was entered into tables and was processed to charts. Results were compared, in the discussion there were expressed some conjecture what effects might have contributed to the observed differences. There was also mentioned the possibility of affecting the quality of propagation material impurities of free growing stock.
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Regulace plevelů v porostu mrkve obecné pěstované na semeno
Coufal, Václav
The aim of this bachelor thesis was the elaboration of a literature review on weed control in carrot (Daucus carota) for seed production and to conduct laboratory experiment focused on testing selectivity and efficacy of herbicides in carrot using the chlorophyll fluorescence imaging technique. The aim of this experiment was to evaluate the efficacy of selected herbicides on common lambsquarters (Chenopodium album) and their phytotoxicity on carrot plants under pre-emergence and post-emergence applications. In addition, preemergence applications were performed in two variants simulating contrast soil conditions. The first was an organic substrate and the other quartz sand. Altogether, 8 herbicide active ingredients were used, some of which are registered in carrots, and some were previously tested abroad, thus providing the potential for improving the system of chemical weed control in carrots. These were carfentrazone-ethyl, clomazone, diflufenican, linuron, mesotrione, metribuzin, pendimethalin and S-metolachlor. Under preemergence application in the organic substrate, the best results were achieved with linuron and pendimethalin, both exhibiting high efficacy against common lambsquarters and low phytotoxicity to carrot plants. Preemergence application of herbicides in quartz sand showed a clear increase of phytotoxicity of preemergence herbicides. Increased phytotoxicity was evident in almost all herbicides, but mostlyin linuron. On the other hand, a decrease in phytotoxicity was found in diflufenican. The lowest phytotoxicity rate was observed for pendimethalin. In early post-emergence applications, the efficacy of all selected herbicides ranged above 90%. The lowest level of phytotoxicity was observed for pendimethalin, linuron, clomazone and mesotrione. Chlorophyll fluorescence imaging represents a very good tool for early assessment of the physiological herbicide effect, however, the evaluation by chlorophyll fluorescence in herbicides affecting directly photosynthesis led to overestimation the effects in comparison with other herbicides.
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Významné obsahové látky u vybraného druhu zeleniny
Jacková, Zdenka
Bachelor thesis is focused on description of important content substances in Daucus carota L. Experimental part is focused on monitoring and evaluating of content substances in nine picked cultivars: 'Kardila', 'Rubína', 'Karkulka', 'Jolana F1', 'Kráska', 'Katlen', 'Jarana F1', 'Koloseum F1', 'Jitka F1'. Vitamin C, dry matter, antioxidants, minerals, refractometric dry matter, nitrates, carotenoids and roughage were determined. Aim was to summarize all results from experiment and compare them with other literary sources. The best results had 'Kráska' variety and the worst had 'Koloseum F1' variety. According to these results, it is recommended to continue in research.
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Vybrané charakteristiky z biologie významných druhů z čeledi miříkovitých
Gregorová, Vladislava
ABSTRACT The objective of this study was to compare the germination of cultural and weed variety of selected species of the family Apiceae. There were selected species: Daucus carota and Pastnaca sativa. For this research were selected three stocks of Carrot: Daucus carota -- wild, Daucus carota -- seeded from stored root in the garden - variety Olympus and Daucus carota -- originated from the propagation crop species -- variety Cider. For Pastinaca sativa were selected two populations: Pastinaca sativa - from the propagation crops and Pastinaca sativa - wild. For analyzed species the germination of achenes was determined under laboratory conditions. Average germination detected in Daucus carota - wild was 51%, for carrot Olympus 74% and for carrot Cider 89%. Average germination detected in Pastinaca sativa -- wild was 2%, for long white parsnip varieties 87%. The final germination was entered into tables and was processed to charts. Results were compared, in the discussion there were expressed some conjecture what effects might have contributed to the observed differences. There was also mentioned the possibility of affecting the quality of propagation material impurities of free growing stock.
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