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Plevele polních plodin pěstovaných ve vybrané lokalitě východních Čech
Hroch, Josef
The diplom thesis deals with the characterization of the agricultural enterprise AGROSPOL Bolehost, a.s., its system of growing cereals and other crops and their weed infestation. The infestation was observed in the following crops: winter wheat, spring wheat, maize, peas, winter rape, sugar beet and white cabbage. The most numerous weeds found in the crops are Amaranthus retroflexus, Bromus sterilis, Capsella bursa‑pastoris, Echinochloa crus‑galli, Elytrigia repens, Galinsoga parviflora, Geranium pusillum, Chenopodium album, Lolium perenne, Mentha arvensis, Poa annua, Silene latifolia, Triplerospermum inodorum.
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Škodlivost polních plevelů ve vybrané plodině
Foldýnová, Pavla
Abstract This bachelors thesis deals with evaluation of heterogeneity and harmfulness of weed infestation in selected crops. Literary part is focused on classification, harmfulness, utility and also regulation of weeds. Second part focuses on direct evaluation of field test in year 2012 in winter wheat on land in Žabčice. By all found weed species, crop equivalents were determined for specifying of harmfulness and also mapping of theirs occurence on the land. Options of effective regulation of this weeds were suggested based on acquired results.
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Polní plevele obilnin a dalších plodin pěstovaných ve vybraném zemědělském podniku
Hroch, Josef
The bachelor thesis deals with the characterization of the agricultural enterprise AGROSPOL Bolehost, a. s., its system of growing cereals and other crops and their weed infestation. The infestation was observed in the following crops: winter rape, winter triticale, winter barley, winter wheat, spring wheat, maize and white cabbage. The most numerous weeds found in the crops are Capsella bursa-pastoris, Equisetum arvense, Fallopia convolvulus, Galinsoga parviflora, Geranium pusillum, Chenopodium album, Medicago sativa, Mentha arvensis, Stellaria media, Taraxacum sect. Ruderalia, Urtica urens, Veronica persica, Veronica polita.
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Druhová diverzita plevelů vybraných polních plodin
Bohuslav, Jakub
This bachelor thesis is focused on different weed species evaluation in selected crops. The monitoring took place was at KOJÁL Krásensko, družstvo. The holding is situated in South Moravian Region, Vyškov District near village Krásensko. It manages estate of total area approximately 1821 hectars. The evaluation of quantity weed species was pursue in four crops: winter wheat, spring barley, oilseed rape and maize. For the research was used fytosociological releve method and computative method. The results for each crop are three average value of weeds in 1m2. The total amount were 25 weed species. The most occurring weed species were: field pansy (Viola arvensis), shepherd´s purse (Capsella bursa-pastoris), canada thistle (Cirsium arvense), couch grass (Elytrigia repens) and buckwheat (Fallopia convolvulus).
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Monitoring of the flowering time of selected arable weed species
Suran, Pavel ; Holec, Josef (advisor) ; Kolářová, Michaela (referee)
Flowers have an irreplaceable role in a sexual reproduction of plants. Flowers also offer the nutrients to high ammount of the insect species, both pollinators and parasitoid imagos. These insect species are depending on a beginning and a lenght of the plant flowering period and some are depending as well on a plant species diversity. Therefor it is important to monitor a flowering time of individual weed species.
The phase of the plant flowering is started, as well as by other things, by a certain temperature and a humidity. Some species might require a different value of these parameters. The beginning and the lenght of the weed flowering should correlate with a development of the temperature and the humidity during the observation period. This monitoring period was the year of 2015 and observed area was the Demontrational and experimentational land of the Faculty of Agrobiology, Food and Natural Resources of the Czech University of Life Science in Prague. During the observation period, the plant flowering times of the individual weed species were recorded on a weekly basis. In this study, the beginning and the end of the plant flowering time were evaluated for every weed species, that were observed on the observed area. Several of the observed species registered a pause in the flowering time, this pause was also evaluated. It was found out, that most of the species, that start flowering in the spring, started flowering roughly one or two months earlier. The plants capable of flowering during a moderate freezes flowered untill the very late autumn or even during november. The plant species, that start thein flowering in the summer were not affected by an increase in the temperature of the first months, but they were affected by the very high summer temperatures and these species stopped flowering and they either never flowered again, or they started flowring, once the temperature dropped.
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Vyhodnocení škodlivosti plevelů v obilninách
Torišková, Veronika
This diploma thesis deals with evaluation of heterogeneity and harmfulness of weed infestation in selected crops. Literary part is focused on classification, spreading, harmfulness, utility and also regulation of weeds. Second part focuses on direct evaluation of field test in year 2012 in winter wheat and in year 2014 in spring barley on land in Žabčice. By all found weed species, crop equivalents were determined for specifying of harmfulness and mapping of theirs occurence on the land. Options of effective regulation of this weeds were suggested based on acquired results.
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