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Způsoby regulace plevelů při pěstování kukuřice seté (Zea mays L.).
VLÁŠKOVÁ, Milena
Corn is an important crop that is increasingly being applied and expanded in our countries. Due to the cultivation technology, weeding can significantly affect its yield. Weed control is mainly solved by the use of herbicides. One of the main objectives of this method is to achieve maximum effect at minimal economic cost. At the same time, the factor of minimizing negative effects on the environment is increasingly taken into account. The thesis describes the basic characteristics of maize, its basic agrotechnics and the extent of its cultivation in the Czech Republic. The basic characteristics and weed distribution are described, including the possibilities of their control. The actual work deals with the effectiveness of two combinations of herbicides used postemergence on land with different maize hybrids and evaluation of their effectiveness with regard to economic aspects.
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Weed control in minimal soil cultivation
CHENÍČEK, Ondřej
This work monitored weeds in three variants of soil cultivation. In three fields was used different variants of soil cultivation, first of them used disc stubble plough, second of this used stubble plough and third variant used classic plough. In this field test was monitored weedy in single years. In first years was be minimal soil cultivated variants more weedy then classic cultivated variant. In next years weedy go down.
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Výskyt chrpy polní na zemědělské půdě v katastru obce Radomilov
Sojáková, Lucie
In my Bachelor thesis I deal with the occurrence of field Cornflower (Centaurea cyanus, Linné 1753) on agricultural land in the cadastral territory of Radomilov village. My Bachelor work began with the characteristics of weeds, their origin, the significance and influence of the conditions on the environment. Then I described the territory, de-termined biogeographical breakdown, geomorphological, climatic and geological con-ditions. In the summer of 2016, I conducted a field survey on arable soils in the ca-dastral area where I recorded field Cornflower plants in the Trimble Juno ST GPS navi-gator. The partial aim of the thesis is to study the occurrence of field Cornflower in the Czech Republic and to find out its demands on the environment. The result of the work is to find the findings in a detailed map and to take into account its abundance. I have found that most of the field Cornflowers plants grow on the edge of the field near the driveways. Beyond the road, under the thick tree crowns and directly in the sown crop, their abundance decreases.
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Polní plevele širokořádkových plodin a technologie zpracování půdy
Renčínová, Eliška
Bachelor thesis deals with weed infestation of wide-row crops particularly in maize sown example and further focuses on possible technological tillage. In the first part, soil tillage is divided into three types including strip till technology, soil conservation and conventional. The most important elements of these partitions are outlined after. In the second part, weed infestation is evaluated and likewise the impact of various tillage technologies on wide-row crop is assessed.
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Působení odlišných podmínek prostředí na klíčení semen plevelů
Pospěch, Lukáš
This work deals with the influence of different environmental conditions on the germination of weed seeds of Polygonum aviculare L. In the first experiment the seeds were exposed to different germination temperatures. The temperature optimum was found at 20 ° C. Germination level was 88 % at this temperature. The effect of exposing seeds for a certa-in period to a freezing was monitored in the second experiment. The effect of freezing was least apparent in seeds exposed to freezing for ten days, when the greatest germination was 87.5%. The total average seed germination of the second experiment was higher by 36.09% than in the first experiment. The results are evaluated in the statistics program and proces-sed in the graph.
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Polní plevele a jejich výskyt ve vybraných polních plodinách
Pfefr, Ladislav
The aim of this thesis was to evaluate the weed infestation of chosen crops on lands of Agrospol a. d., Knínice. The evaluation was carried out in growths of corn, sunflower and opium poppy. The weed infestation was processed by canonical correspondence analysis (CCA). Species as Equisetum arvense, Echinochloa crus-galli, Thlaspi arvense, Veronica persica, etc. were identified in corn. Species Echinochloa crus-galli, Amaranthus sp., Avena fatua, etc. were found in sunflower. Weeds as Symphytum officinale, Equisetum arvense, Chenopodium album, Viola arvensis, etc. occurred in opium poppy.
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Studium vlivu vybraných podmínek prostředí na klíčení semen plevelů
Navrátil, Tomáš
The aim of this thesis was to find out the influence of temperature on germination of Tripleurospermum inodorum seeds. Seed germination took place in laboratory conditions. This thesis is based on two laboratory experiments. During the first experiment, the effect of different temperatures on the germination of Tripleurospermum inodorum seeds was observed. During the second experiment, it was observed how would the Tripleurospermum inodorum seed germinate if it was exposed to freezing temperatures for various periods of time. The seeds germinated best at 20 °C. At this temperature, germination was 92.5%. During the second experiment, the best germination was 74.5%. It was with seeds that had been exposed to frost for thirty days. Results have been written to the tables and processed to graphs. In addition, germination results were compared to other weed species. Evaluation of the thesis is given in the discussion.
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Polní plevele víceletých pícnin
Kadlček, Leoš
The aim of this diploma thesis is determination of alfalfa (Medicago sativa) infestation in Agricaltural company Kvasicko a. s. The monitoring of infestation was doing from 2013 to 2016 on land Odšenkovna, sawn on 29. 8. 2013, and on land Novina levá, sawn on 11. 4. 2014. Evaluation was made by counting method. The results of this evaluation were processed with DCA analysis and canonical corespondence analysis (CCA). It was found 11 species of weeds on observed lands during the monitoring. The most frequently weeds were: Capsella bursa-pastoris, Stellaria media, Taraxacum sec. Ruderalia and Veronica.
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Plevele ozimé pšenice a zpracování půdy
Hasa, Václav
The bachelor thesis is focused on the issue of winter wheat weeds and their relation to the soil processing. Three different soil treatment technologies and two precursors were studied in the experiment. The results were based on gradient length analysis, as determined by DCA segment analysis (Early Correspondence Analysis). The redundancy analysis (RDA) was also used and the data was processed using the Canoco 4.0 computer program. In traditional soil cultivation ware found the lowest values of weed appearence, with the exception of Veronica polita. The medium occurrence of weed species showed the use of minimize soil tillage. There were found species Capsella bursa-pastoris, Lamium amplexicaule, Stellaria media and Thlaspi arvense, but their incidence was significantly lower compared to non-tillage technology. The non-tillage technology showed, with exception of Veronica polita, the highest values of weeb species especially in case of Capsella bursa-pastoris.
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Zhodnocení výskytu polních plevelů na vybraných pozemcích v bramborářské výrobní oblasti
Hromádko, Petr
This bachelor thesis focuses on the evaluation of the occurrence of field weeds in a different crops in the potato-growing region. This thesis also compares a weed infesta-tion in a different crops and proposes their weed management. The observation was per-formed on the selected lands of the agricultural holding I. AGRO Oldřiš a.s. during the year 2018. The weeds were observed in the following crops: spring barley, winter tritica-le and winter rape. The most numerous weeds found in the crops were: Viola arvensis, Stelaria media, Arabidopsis thaliana, Capsella bursa-pastoris, Holcus mollis, Elytrigia repens, Poa annua, Apera spica-venti, Tripleurospermum inodorum, Veronica hederifo-lia, Cirsium arvense.
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