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The control of weeds in maize stand (\kur{Zea mays L.})
VANĚK, Robert
Some of weeds have disappeared owing to the plant production specialization; some of them have become more resistive. Those weeds have taken significant role due to its danger and frequency of presence. The thesis is mainly focused on description of biology and morphology of weeds, possibilities of weeds spread and weed control. Methods of mechanical and chemical regulation are described based on these facts. The experiments, which were carried on maize, determined the effect of selected herbicide and its active substance on weed control. Following precautions, which were suggested, have led to successful suppression of specific significant weeds.
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The use of maize (Zea mays) for non-food purposes
ZELENKA, Pavel
The intention of the bachelor thesis was to write a summary about the use of maize like a renewable resource, especially for the production of heat, electric energy and biofuels. The thesis is developed in the form of literary glossary topic. The use of agricultural crops in the energy sector and industry is very current. It offers possibilities to partially replace fossil fuels and thus not only reduce greenhouse gas emissions, but also the dependence on oil, coal and natural gas. In this way, we can solve the problems of the utilization of agricultural land referred to a standstill.
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Biodiversity of epigeic beetles on selected field crops - effects of management on the structure of communities
SVOBODA, Richard
Epigeických beetle communities were studied on four agroecosystems with different crops grown. All four agroecosystems were located in the vicinity of Czech Budejovice (South Bohemia). The first agroecosystem is conventionally grown corn. On the second one agroecosystem it was conventionally grown wheat. The third agroecosystem was barley and the fourth was permanent grassland. Individual agroekosystems differed not only in crops but also in agrotechnical operations during the capture. In all agroecosystems was for capture of the material used method of pitfall traps. Subsequently, those types have been studied. Then was studied degree of human impact on the biodiversity of species of different ecological groups found in these locations.Beetle activity was highest in the maize agroecosystem. There was found almost half of all captured individuals. In all agroecosystems was activity affected by management of agrotechnic operations and also by for that year specific weather. All sites were completely dominated by expansive species (E - types of deforested habitats strongly influenced by human activities)
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The utillization of maize for energetic purposes
WOLLNER, Antonín
The goal of my thesis is to evaluate the importance of maize in biogas plants. The questionnaire was made to determine the parameters of hybrid corn, its harvest, subsequent silage, inclusion in the daily batch of biogas plants, and various technical and economic parameters. Twenty five biogas plants were addressed to participate in the survey. Despite the promise of anonymity, the data were obtained from only six biogas plants. Biogas plants are located in different regions of the Czech Republic, at different altitudes. The sixth and the last biogas plant is located in Austria.
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Hydrolysis of corn silage
MÍKA, Václav
Aim work is compare yield GE at acid, alkalic and enzymatic hydrolysis cellulose phytomass at different acidity (H2SO4, 3, 6, 9 and 12%), fundamentals (NaOH, 3, 6, 9 and 12%) and while using different enzymatic preparations (6 preparations to hydrolysis celluloses and hemicelluloses). Further is assessed positive influence compressive extrusion (0,3MPa and 1MPa).
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Study of selected factors influencing maize for silage agronomic attributes
KADOUN, Lukáš
In the years of 2009 and 2010, an observation of chosen quantitative and qualitative measures of several hybrids of corn took place at PS Humpolec and ZD Hosín. Quantitative measures were evaluated based on dissection of individual plants, qualitative measures then through common laboratory methods. In the field experiments at PS Humpolec, an observation of the seeding quantity and nitrogen load took place. The seeding quantity influenced with very high size of effect all agronomical and seed figures, except for the number of rows in the cob, where only high size of effect was observed. The quantity of 85 thousand seeds per hectare seems to be optimal. The nitrogen load influenced with very high size of effect the weight of the cob, with high size of effect the number of cobs and the weight of grains in the cob. Other measures were not affected. The year influenced with very high size of effect the length of the plant, the number of leaves, the weight of the cob; with high size of effect the height of the first cob on the plant and with considerable size of effect the number of cobs on the plant and the length of the cobs. Other observed measures were not affected by the year. Optimal nitrogen load that can be recommended is 110 kilograms per hectare. The best digestibility was noted with 100 thousand seeds per hectare and 110 Kg of nitrogen per hectare, or with 70 thousand seeds per hectare with no nitrogen. In the operational and half-operational experiments at ZD Hosín, differences between chosen hybrids were observed. Based on the results, the best one that can be recommended for these environmental conditions is Karacho, with FAO 260. Hybrid Karacho achieved the highest yield of matter in both years and in the year of 2010 it also achieved the best digestibility.
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Maize Growing for Energy Generating Purposes
NAVRÁTIL, Martin
In experiment we grown two maize hybrids for energy purpose. Growth was established as small plats. At maize growth main comparable datas were yield and content of dry mass. From outgrowth was selected maize hybrid with bigger yield and better biomass for next energy processing.
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Production capability and growing specialities of selected energy plants
DVOŘÁK, Adam
Agriculture started the new way, instead of the food crops is icreased growing of energy crops. Thesis {\clqq}Production potencial and specificity of energy plant growing`` deals with evaluation of suitability of selected energy crops in field trials and theire needs of soil, clima and agrotechnology. The growth ability, health were evaluated during vegetation period and production potencial in harvest time in choosed group of energy crops. The thesis content also the seed quality, field germination and initial growth evaluated in conditions of anthropogenic soils.
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The yield loss of maize (Zea mays L.) grown for grain when the plants are mechanically damaged
Lujc, J. ; Cerkal, R. ; Dvořák, J. ; Vejražka, K. ; Kamler, Jiří
Deficit of water, oxygen and a low temperature are the main stress factors in crop fields. From biotic stress factors, pathogenic microorganisms, but also many species of animals as evolutionary advanced herbivores, cause serious plants damage. The impact of three different intensities of leaf damage (not damaged, damaged by 25% and 50%, also by 75% in 2005) on the maize yield of hybrid varieties Reseda and Ribera was monitored in a field experiment founded in 2004 and 2005 in locality Žabčice (corn production region, zone K2, average altitude 184). The rising intensity of the leaf area reduction negatively influenced the economic grain yield. However, the yield differences were not statistically significant. Decisive differences in TGW values were not established among individual variants, nor were observed significant changes in the weight of cobs and the grain ratio.
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