Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2021 (vol. 69), issue 1
Evaluation of the Floristic Composition and Soil Properties of Grasslands in the Mohelno Serpentine Steppe 20 Years Since the Reintroduction of Sheep Grazing
Marie Mrázková-Štýbnarová, Pavel Veselý, Jaroslav Čáp, Karel Fiala, Aleš Dufek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 11-20 | DOI: 10.11118/actaun.2021.001 
In the paper there is evaluated floristic composition and soil characteristics of grasslands in the Mohelno Serpentine Steppe, where the sheep grazing was renewed after ca 60 years in 1997. Soil samples were collected in spring 2016 from 9 permanent plots MHS 1-9 in the same date as the phytocoenological relevés were conducted. In the soil there was determined the soil acidity and the content of macro- and micronutrients. Data were evaluated using RDA (redundance analysis). It was found the higher dominance of species such as: Plantago lanceolata L., Festuca pseudovina Hack. ex Wiesb., Achillea collina Heimerl, Cerastium arvense L. and Centaurea scabiosa...
Substantiation of the Working Width of the Tillage Implement
Anton Kuvaev, Alexey Derepaskin, Ivan Tokarev
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 21-31 | DOI: 10.11118/actaun.2021.002
The paper presents the results of theoretical and experimental studies on the substantiation of the working width of the tillage implement for deep tillage. The field experiment was conducted using the <<Kirovets>> K 744P2 tractor, with an engine power of 257 kW and an operating mass of 17,000 kg. It was revealed that the optimum working width of the implement should be 4.9-5.6 m at the travel speed of 2.2-2.0 m/s respectively. This provides a working capacity of 3.9-4.0 ha/h, with the fuel consumption of 13.7-14.1 kg/ha. The optimization criteria for selecting the optimum working width were the working capacity and specific fuel consumption...
Comparisons of Uniform and Variable Rate Nitrogen Fertilizer Applications in Real Conditions - Evaluation of Potential Impact on the Yield of Wheat Available for Use in Animal Feed
Jakub Elbl, Jiří Mezera, Antonín Kintl, Petr Širůček, Vojtěch Lukas
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 33-43 | DOI: 10.11118/actaun.2021.003
The presented research deals with the variable application of N fertilizers (VRA NF) in the stand of winter wheat and with possibilities for evaluating the effect of such application on grain yield. The effect of VRA NF was assessed in close cooperation between Spearhead Czech Ltd. and Mendel University in Brno within an operational experiment. In 2018 and 2019, three experimental plots were always chosen on which VRA NF was implemented by conventional technique according to application maps. Each application map included control strips with the uniform NF application. The application maps were prepared based on the spectral analysis of satellite images....
Quadratic Quasinorm and Its Applications in Risk Analysis
Jakub Šácha, Veronika Lacinová, Zdeněk Karpíšek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 45-49 | DOI: 10.11118/actaun.2021.004
This paper deals with the estimation of the probability distribution of the category random variable from its observed values. The gradient estimation presented is based on the f-quasi-norm term. The gradient estimation tends to move away from the empirical distribution towards a uniform distribution. For this reason, it is called the pessimistic estimate. The paper deals with both point and interval estimates. The bootstrap method is used for interval estimates. The theoretical results are illustrated using specific economic data.
Priority Determination in Water Resources Allocation in Hirmand River Area
Mohammad Hussein Karim, Mahmood Mohammadghasemi
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 51-58 | DOI: 10.11118/actaun.2021.005
Supply and demand management of Hirmand water resources is one of the most important problems facing by policy makers and they will not be able to manage this sector properly without specifying the future prospects of the Hirmand Area. The main objective of the research is to determine the priority of future allocation of water resources in the Hirmand Area by using dynamic optimization models in different climatic conditions in agricultural, household, public and environmental sectors. The method of this research is based on the applied scientific method. The required statistics and information are obtained by the library method. In this research,...
Drivers of Crop Diversification: Evidence from Smallholder Farmers in Delta State Nigeria
Odjuvwuederhie Emmanuel Inoni, Bayero Sule Gani, Elizabeth Sabo
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 59-70 | DOI: 10.11118/actaun.2021.006
Smallholder farmers in southern Nigeria have relied on the cultivation of cassava, yam, maize and plantain for their livelihood for generations. However, with rising climate variability and soil degradation, many farmers are adopting crop diversification as a viable alternative to improve the productivity of their farmland by growing multiple crops. Therefore, this study was conducted to examine factors that influence crop diversification, and the intensity of crop diversification among small-scale farmers in Delta State. Data for the study were obtained from a random sample of 236 farmers. Crop diversification index (CDI) was used to measure crop...
Effect of Foliar Copper-Containing Superabsorbent Polymers on Nutritional Characteristics and Mycotoxin Contamination of Wheat Kernel
Ivana Kolackova, Hana Abigail Gruberova, Ondrej Kratochvil, Daria Baholet, Jiri Skladanka, Josef Jancar, Petr Skarpa
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 71-78 | DOI: 10.11118/actaun.2021.007
Novel use of superabsorbent polymers to deliver copper-based foliar fertilization was tested as a means against fungal mycotoxin production and monitor its effect on nutritional characteristics of wheat. Experiment was located in Žabčice, South Moravia region of the Czech Republic, tested wheat variety was 'Julie'. Differences in fertilization medium (water or superabsorbent polymers) and copper treatments (control, CuO, CuSO4, Cu-EDTA, CuO-nano) were tested. Effect of different variants on percentage of ash, crude protein, crude fat and crude fiber, acid detergent fiber, ash-free neutral detergent fiber, lignin, cellulose and starch were...
Morphological and Molecular Marker Screening for Drought Tolerance in Egyptian Jew's Mallow (Corchorus olitorius L.) Landraces
Talaat Bashandy, Abdel-Haleem A. H. El-Shaieny
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 79-89 | DOI: 10.11118/actaun.2021.009
Drought is the most important abiotic stress that severely affects the growth and yield of crops. The current study aimed to evaluate seven Jew's Mallow landraces (collected from different locations of Egypt) for both their response to water deficit and the level of genetic diversity among them. The water regime conditions that based on either 95% or 60% field capacity (FC) were applied after 21 days from the sowing date. Some morphological traits were measured, and the genetic diversity was evaluated by using random amplified polymorphic DNA (RAPD) marker. The results showed that the landraces differed in their responses to water deficit. All the...
Effect of Increasing Zearalenone Levels on the Technologically Problematic Microorganisms and Food Risky Pathogens (in Vitro)
Ludmila Křížová, Marcela Klimešová, Oto Hanuš, Irena Němečková, Petr Roubal, Jana Tšponová, Miroslav Skřivánek, Ludmila Nejeschlebová, Radoslava Jedelská
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 91-100 | DOI: 10.11118/actaun.2021.010
The aim of this study was to determine the effect of different zearalenone (ZEA) concentrations (0, 10, 100, 250, 500, 1 000 µg/l) on growth of Bacillus cereus, Staphylococcus aureus and Pseudomonas fluorescens in milk. The samples were incubated for 6 days at 22 and 30 °C (B. cereus and S. aureus) or at 6.5 and 22 ℃ (P. fluorescens), respectively. Counts of bacteria in milk were measured every 24 hours. Maximum counts of B. cereus after 144 h of incubation at 30 ℃ ranged from 7.00 to 7.78 log CFU/ml. The most significant effect of ZEA on B. cereus across the experiment was observed after 96 h of incubation at 22 °C and after 72 h...
Hematological and Intestinal Responses of Broilers to Dietary Supplementations of Lactic Fermented Turmeric, Black Pepper or a Mixture of Both
Sugiharto Sugiharto, Endang Widiastuti, Anugrah Robby Pratama, Hanny Indrat Wahyuni, Turrini Yudiarti, Tri Agus Sartono
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 101-110 | DOI: 10.11118/actaun.2021.011
The present experiment investigated the impact of administrations of lactic fermented turmeric, black pepper or a mixture of both into diets on the hematological parameters and intestinal ecology and morphology of broilers. Three hundred and ninety two broilers were spread to T0 (control), T1 (feed administrated with 1% lactic fermented turmeric), T2 (feed administrated with 1% lactic fermented black pepper) and T3 (feed administrated with 1% lactic fermented turmeric and 1% lactic fermented black pepper). Blood sampling was conducted at days 21 and 35, while intestinal sampling was at day 35. At day 21, erythrocyte counts were greater (P ≤ 0.05)...
Corporate Governance and Voluntary Disclosure Practices in Czech Republic
Abdul Mansulu
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 111-125 | DOI: 10.11118/actaun.2021.012
The decision to disclose enough information in annual reports is seen as an act of transparency. This study seeks to measure the extent of voluntary disclosure and to examine the relationship between corporate governance determinants and the level of voluntary disclosure. The study reports an average of 51.5% as the level of voluntary disclosure. Four corporate governance variables are used as the basis for the regression analysis. The evidence shows a positive association between the level of voluntary disclosure and the proportion of independent directors, block holder and the proportion of the audit committee with only the proportion of audit committee...
The Spectrum of Weed Species and Fungal Pathogens in Stands of Alternative Fodder Crop Lolium Multiflorum Var. Westerwoldicum Growing up in a Drought-Prone Area in the Czech Republic
Leoš Kadlček, Eliška Nováková, Ivana Šafránková, Radovan Pokorný, Pavel Horký, Martin Jiroušek, Jan Winkler
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 127-137 | DOI: 10.11118/actaun.2021.013
Annual ryegrass (Lolium multiflorum var. westerwoldicum) is cultivated in various areas of the world as a feed for live stock. Efforts to improve the production of high-quality feed in the face of deepening climate change have increased the demand for growing non-traditional types of crops, including ryegrass. The aims of the research were to determine the spectrum of weed and fungal pathogen species and to assess dangerous species of weeds and pathogens which negatively affect forage crops of annual ryegrass grown in dry conditions. In 2018-2019 the occurrence of weeds and fungal pathogens of ryegrass was evaluated in field conditions. The assessed...
Evaluation of the Selectivity and Efficiency of Synthetic Sex Pheromones of Leaf-Rollers from Different Manufacturers
Žaneta Pražanová, Hana Šefrová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 139-147 | DOI: 10.11118/actaun.2021.014
In 2019 (May-September), the efficiency of pheromone lures for Grapholita funebrana Treitschke, 1835 and Pandemis heparana (Denis & Schiffermüller, 1775) from two manufacturers (Propher, Pherobank) were compared. Monitoring was performed in three study areas in South Moravia (Czech Republic): Kyjov (faunistic square 6968), Brno-Soběšice (6765) and Brno-Starý Lískovec (6865). A total of 14 pheromone traps, from both companies, were suspended. Both target species were found in the traps, with Grapholita funebrana present in all study areas (a total of 5107 adults) and Pandemis heparana was found in Kyjov (64 adults). Furthermore, 2061 individuals...
New Product Launch Success: A Literature Review
Alexander Salmen
Acta Univ. Agric. Silvic. Mendelianae Brun. 2021, 69(1), 151-176 | DOI: 10.11118/actaun.2021.008
This review article deals with the current state of knowledge on the topic of launching new products on the market and the success factors that constitute launch success. As things stand today, it can be stated that the existing research work already covers a broad range of topics and that there is an extended pool of relevant results, which, however, appear rather confusing for the most part due to the lack of comparability of methods and indicators and a large number of specific topics dealt with. It also reveals many gaps of science for future research. The method of this article uses integrative review approach with elements of semi-structured...