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Vliv kombinace biouhlu a zinečnatých nanočástic na rostliny kukuřice seté kultivovaných v in vitro podmínkách
Szomolaiová, Erika
Combined application of zinc oxide nanoparticles (ZnO NPs) and biochar could be a perspective tool for enhancing plant viability and mitigating a large scale of stresses in crops. To investigate effect of different concentrations of ZnO NPs (0, 50, 100 and 1000 mg/L), biochar, and their combination on corn plants (Zea mays L.), in vitro experiment took place. Zinc uptake in form of zinc NPs and possible effect of biochar on zinc uptake and accumulation were determined by atomic absorption spectrometry. A positive correlation between ZnO NPs concentration and zinc content in shoots was identified. There was no significant difference observed in plants treated with biochar. Physiological state of plants was evaluated by spectrophotometric analysis of photosynthetic pigments and secondary metabolites. The most significant effect was observed in content of phenolic compounds that increased with increasing ZnO NPs concentration. On the contrary, presence of biochar resulted in significant decrease (p < 0,05) of polyphenols.
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Environmentální aspekty pěstování mužáku prorostlého (Silphium perfoliatum L.)
MARŠÍKOVÁ, Dominika
Growing plants for feed or energy purposes in the Czech Republic is still a topic of concern. In this respect, mainly Zea mays L. is used. Growing Zea mays L. brings with it a number of environmental problems. One way to reduce these impacts is by replacing Zea mays L. with other plants suitable for these purposes. The alternative is to grow perennial energy plants. One of these may be the newly introduced species Silphium perfoliatum L. This work presents the results of the evaluation of the environmental aspects of growing Silphium perfoliatum L. for the purpose of obtaining phytomass compared to commonly used sowing techniques. The results are based on a 3-year follow-up in small field trials. The environmental burden related to the monitored cultivation procedures was evaluated on the basis of the LCA method within selected impact categories using the SimaPro v.7.3.2 software with the integrated ReCiPe Midpoint (H) method. According to the results, Silphium perfoliatum L. can be grown with generally lower environmental impacts than in the case of Zea mays L.
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Konzervace kukuřičné siláže
KOZÁK, Jonáš
Corn silage is the cornerstone of the feed base in cattle feed and the main source of energy for the production of biogas stations. On modern farms, therefore, maize (Zea mays) is one of the main crops involved in crop rotation. A large part of the company's economic results is based on the quality of the bulk feed produced. This means that during a relatively short period of harvesting and storage of feed for silaging, the economy of production is decided throughout the year. Therefore, it is the task of management to manage this process so that it produces the highest quality feed at the lowest possible cost. Despite the effects of climatic, economic, political, technological or other influences. Even the fact that silage has a long tradition, ů2unfortunately, in practice, it is often possible to encounter mistakes that lead to the production of low nutritional and even dangerous for the health of animals. Such silage has a negative impact on the entire economic development of the enterprise, and it is therefore the aim of this work to develop a literature search on this subject and to propose measures that will lead to an increase in the level of production not only of maize silage.
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