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Results 1261 to 1290 of 1506:

Využití morfologických deskriptorů a DNA analýzy pro detekci duplicit v české kolekci genetických zdrojů papriky

Helena Stavělíková, Pavel Hanáček, Tomáš Vyhnánek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(1), 191-198 | DOI: 10.11118/actaun201058010191

The pepper (Capsicum annuum L.) is very popular annual vegetable either for fresh consume either as spice after drying and grinding. The fruit contains high amounts of vitamin C, provitamin A, E, P (citrin), B1 (thiamine), B2 (riboflavin) and B3 (niacin). Crop Research Institute (CRI), Department of Vegetable and Special Crops, Olomouc, the Czech Republic is the holder of the collection of pepper genetic resources. The collection of pepper consists of 504 accessions, currently. It is necessary to find duplications within collection for effective work with genetics resources. For analyses totally 41 accessions were chosen. These were divided into ten groups according name: 1. Astrachanskij, 2. Aufrechte Cayenne, 3. Bogyisloi, 4. Hatvani, 5. Japan Hontakka, 6. Japan Madarszen, 7. Kalocsai Fuszer (Edes), 8. Konservnyj Belyj 289, 9. Tetenyi and 10. Vinedale. Two approaches were used for the detection of duplications - morphological description and polymorphism of DNA. The accessions were characterized for 54 morphological traits: 1 character in seedlings, 8 characters in the plants, 10 characters in leaves, 10 characters in flowers and 25 characters in fruits. The polymorphism of DNA was analysed using the SSR (Simple Sequence Repeats) method with 8 SSR markers (Hpms 1-1, Hpms 1-5, Hpms 1-168, Hpms 1-172, Hpms 1-274, Hpms 2-21, Cams 163 and Cams 647) which are localised on different chromosomes. The results from DNA analysis were complemented with the morphological characterization. Possible duplications were in 4 groups: 1. Astrachanskij, 4. Hatvani, 5. Japan Hontakka and 7. Kalocsai Fuszer (Edes). This work is the first step for the determination of duplications in the Czech germplasm collection of pepper.

Comparing the potential use of oriental war philosophy and western combat strategies in the competition of companies

František Bartes

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(2), 21-24 | DOI: 10.11118/actaun201159020021

The demonstration of the GFLV Nepovirus isolates on naturally infected grapevine cultivars and evaluation of variability within genome region encoding movement protein

Aleš Eichmeier, M. Baránek, M. Pidra

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(3), 35-44 | DOI: 10.11118/actaun201159030035

Exploratory analysis of selected indicators of the Czech Republic regional labour markets

Bohumil Kába

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(4), 123-128 | DOI: 10.11118/actaun201159040123

The availability of mineral nitrogen in Mediterranean open steppe dominated by Stipa tenacissima L.

Irena Novosádová, Jaroslav Záhora, José Damian Ruiz-Sinoga

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(5), 187-192 | DOI: 10.11118/actaun201159050187

Evaluating of selected parameters of composting process by composting of grape pomace

Patrik Burg, Pavel Zemánek, Milan Michálek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(6), 75-80 | DOI: 10.11118/actaun201159060075

First anatomically characterized wood from the Tertiary of Moravia: Spiroplatanoxylon from the area of Austerlitz (Southern Moravia, Czech Republic)

Ingrid Továrková, Vladimír Gryc, Jakub Sakala

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(6), 367-372 | DOI: 10.11118/actaun201159060367

Vectorised Spreading Activation algorithm for centrality measurement

Alexander Troussov, František Dařena, Jan Žižka, Denis Parra, Peter Brusilovsky

Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(7), 469-476 | DOI: 10.11118/actaun201159070469

HYDROBIOLOGICKÁ STUDIE MALÉHO TOKU NA ČESKOMORAVSKÉ VRCHOVINĚ

Ivo Sukop, Jan Šťastný, Tomáš Vítek, Tomáš Brabec

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 213-222 | DOI: 10.11118/actaun201058040213

Zoobenthos of the Fryšávka Rivulet was investigated in the years 2007-2008. Research included also physico-chemical factors of water (temperature, pH, conductivity, oxygen saturation). Altogether, 144 taxa of zoobenthos were determined in the Fryšávka Rivulet: Coelenterata (1 taxon), Turbellaria (1 taxon), Oligochaeta (6 taxa), Hirudinea (1 taxon), Mollusca (5 taxa), Amphipoda (1 taxon), Decapoda (1 taxon), Acari (1 taxon), Ephemeroptera (18 taxa), Plecoptera (18 taxa), Heteroptera (1 taxon), Megaloptera (1 taxon), Planipennia (1 taxon), Trichoptera (36 taxa), Coleoptera (8 taxa), Diptera (44 taxa). Altogether, 76 taxa of zoobenthos were determined in Medlovka brook: Coelenterata (1 taxon), Turbellaria (1 taxon), Oligochaeta (2 taxa), Mollusca (1 taxon), Isopoda (1 taxon), Amphipoda (1 taxon), Acari (1 taxon), Ephemeroptera (14 taxa), Plecoptera (8 taxa), Megaloptera (1 taxon), Trichoptera (17 taxa), Coleoptera (6 taxa), Diptera (22 taxa).
The average abundance of zoobenthos of the Fryšávka Rivulet was 3208 ind.m-2, the average biomass was 7.5 g.m-2, respectively. The same values for the Medlovka brook were: abundance 3238 ind.m-2 and biomass 5.8 g.m-2. The average value of the saprobic index for the whole Fryšávka Rivulet was 1.25 (oligosaprobity), for the Medlovka brook 1.42 (oligosaprobity).

BIODIVERZITA MAKROZOOBENTOSU TEKOUCÍCH VOD JIŽNÍ MORAVY

Ivo Sukop

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 303-310 | DOI: 10.11118/actaun201058020303

The present work gives the results of the research of macrozoobenthos some running waters drainage areas of the Dyje River (southern Moravia - Czech Republic). Altogether, 762 taxa of macrozoobenthos were determined from the running waters of southern Moravia. Porifera (3), Hydrozoa (3), Turbellaria (8), Nematoda (14), Nematomorpha (1), Oligochaeta (60), Hirudinea (18), Bryozoa (5), Mollusca (44), Isopoda (2), Amphipoda (4), Decapoda (2), Hydracarina (17), Ephemeroptera (65), Plecoptera (55), Odonata (26), Heteroptera (3), Plannipennia (2), Trichoptera (128), Coleoptera (59), Diptera (243). Some taxa of macrozoobenthos are extinct unfortunately in running waters of Southern Moravia at present time. Another ones appear newly, for example snail Potamopyrgus antipodarum from New Zealand or Dreissena polymorpha from Pontic region. The data presented in this paper may serve as a basis for future monitoring of water quality and zoobenthos composition in connection with presumption of climate changes.

Potenciál tvrdosti zrna ječmene (Hordeum vulgare L.) jako selekčního znaku v procesu šlechtění

Karel Vejražka, Vratislav Psota, Jaroslava Ehrenbergerová, Natálie Březinová Belcredi, Radim Cerkal

Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(2), 99-104 | DOI: 10.11118/actaun200755020099

The study presents the results of research on the use of barley caryopses hardness for prediction of the malting quality. Grain hardness was determined by three methods: Particle size index (PSI), hardness according to Brabender (BRA) and grain milling energy (GME). The correlations among methods for determining the kernel hardness were estimated as well among selected technological traits of barley and malt and kernel hardness. Significant correlations were found among PSI values and Final attenuation of laboratory wort from malt (0.73*) a Glycidic extract (0.70*). Values of kernel hardness measured by BRA significantly correlated with Final attenuation of laboratory wort from malt (-0.80*) and Soluble nitrogen of malt (0.64*). Grain milling energy values were statistically significant correlated with Nitrogen content in malt (0.64*). The preliminary results confirmed the possibility to use kernel hardness for prediction of some malting quality traits. Further studies will be done on larger number of samples.

Možnosti harmonizace účetního výkaznictví pro malé a střední podniky

Hana Bohušová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(6), 17-26 | DOI: 10.11118/actaun200755060017

The most business entities in Europe are small or medium-sized enterprises (SME), which have a legal obligation to prepare financial statements in accordance with a set of accounting principles accepted in their country. Those statements are available to creditors, suppliers, and national governments but they could be badly understandable to creditors, suppliers and subjects in other countries. This is a great obstacle of their activities in the EU internal market. The existence of 27 different national accounting systems in the EU can be held for the most important obstacle.
There are many ways how to develop compatible accounting standards for SMEs but the most significant activity in this field is the research project of IASB (International Accounting Standards Board). IASB has developed IFRS (International Financial Reporting Standards). Even though IFRS are suitable for all enterprises, their application in case of SMEs would be very expensive and could significantly increase compliance costs of taxation. This development has not been finished yet and there are still some problems which need to be solved before the introduction of accounting standards to the public.
The research has shown that IFRS for SMEs should be used mainly by the entities which do not have public accountability - i.e. that its equities are not publicly traded and do not hold assets in a fiduciary capacity for a broad group of outsiders. This paper discusses those IFRS modifications, which should be done in case of SMEs.

Vliv uhelných popelů na kvalitu kukuřice. Část 2. Mikroelementy.

Jacek Antonkiewicz, Tomáš Lošák

Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 9-16 | DOI: 10.11118/actaun200755050009

Studies on the effect of ashes on maize were conducted as a pot experiment on mineral soil, to which between 13.33 and 800.0 g ash∙pot-1 was added, corresponding to the doses of between 10 and 600 t∙ha-1. The research aimed to learn the effect of diversified ash doses on the content, uptake and proportions between Fe, Co, Mn, Al and Si in maize. It was found that with increasing ash dose in soil were significantly increasing the concentration of Fe and Si in plants (Fe: 110.15-209.96 mg.kg-1 d.m.; Si: 40.60-76.10 mg.kg-1), whereas concentrations of Co, Mn and Al in maize were decreasing (Co: 0.30-0.11 mg.kg-1 d.m.; Mn: 207.83-44.65 mg.kg-1; Al: 300.09-179.80 mg.kg-1 d.m). Higher contents of the studied elements were detected in maize roots than in its aboveground parts. Obtained yield of maize aboveground parts from the objects where solely ash was used as the substratum was characterized by the optimal content of Fe (104.61 mg.kg-1 d.m.), but deficient concentration of Mn (29.69 mg.kg-1 d.m.) and Co (0.01 mg.kg-1 d.m.). In effect of growing ash doses in soil Fe:Co, Fe:Mn, Fe:Al and Mn:Co ratios were widening, whereas Fe:Si, Mn:Al, Mn:Si and Al:Si ratios were narrowing. Growing ash doses in soil influenced a decreased uptake of Co, Mn and Al and increased Si absorption by maize.

Změny zásoby půdní organické hmoty v ornici a podorničí způsobené obilninami pěstovanými v osevních sledech

Vítězslav Vlček, Radomíra Střálková, Jitka Podešvová, Eduard Pokorný

Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 205-210 | DOI: 10.11118/actaun200755050205

The paper evaluates seven years (1993-1999) of Soil organic matter supply monitoring in multifactor field trials conducted by the Agricultural Research Institute in Kroměříž, Czech Republic, (mean annual temperature 8.9 °C, total annual precipitation 599 mm, medium Luvi-Haplic Chernozem). The studied plots were a part of nine-crop rotation: alfalfa the 1st and 2nd year, winter wheat, spring barley, sugar beet, spring barley, winter wheat, silage maize and spring barley. The Soil organic matter supply was measured on four plots: winter wheat after spring barley (var. 1), winter wheat after alfalfa (var. 2), spring barley after winter wheat (var. 3) and spring barley after sugar beet (var. 4). Soil samples were taken from April to July (14-day period) from topsoil (0-30 cm) and subsoil (30-60 cm). The content of Soil organic matter was determined by wet oxidation. Using bulk density, the C content (%) was converted to C supply (t.ha-1). Average yield (t.ha-1) reached 6.54 t/ha (var. 1), 7.47 t/ha (var. 2), 6.52 t/ha (var. 3) and 7.20 t/ha (var. 4). Evaluation of the results was carried out by the analysis of variance and time changes by the second-degree regression analysis. Results demonstrated that Soil organic matter supplies were significantly changed in topsoil. The highest supplies were found in barley after sugar beet (118 t.ha-1), the lowest ones in wheat after alfalfa (111 t.ha-1). As for the cereal species generally, it was documented that in topsoils under barley the supplies were higher than under winter wheat. In subsoil, there were significant differences between wheat after alfalfa (111 t.ha-1) and barley after wheat (104 t.ha-1). As for a difference in the Soil organic matter supply in subsoil according to the cereal species the situation was contrary than in topsoil. Higher supplies were under wheat. Generally (topsoil and subsoil), the highest supply of Soil organic matter was in barley after sugar beet (224 t.ha-1) and similarly in wheat after alfalfa (222 t.ha-1). The smallest supply was in the variant of wheat after barley (217 t.ha-1). In topsoil, the average supply of humus was 114 t.ha-1 and that in subsoil was 107 t.ha-1 the difference being statistically significant.

Výskyt, vývoj a hálkový polymorfismus Harmandiola cavernosa (Rübs.) (Diptera, Cecidomyiidae)

Jaroslav Urban

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 235-258 | DOI: 10.11118/actaun201058020235

A gall midge Harmandiola cavernosa (Rübs.) is the second most frequent Cecidomyiidae species on Populus tremula in the CR. In 2007 and 2008, it occurred very abundantly in Forest District Bílovice nad Svitavou, Training Forest Enterprise Masaryk Forest in Křtiny (former Brno-venkov District). Imagoes occurred there at the end of April and at the beginning of May. Galls grew up as early as at the end the first week in May. The formation of galls is mainly indicated by larvae of the first instar and partly larvae of the second instar. Larvae of the third instar did not participate in the creation of galls. Mature galls were on average 5.4 mm long, 4.8 mm wide and 4.7 mm high showing an inner chamber of an average length 2.4 mm and width 1.4 mm. Larvae abandoned galls from the end of May until mid-July. On average, 44% larvae completed successfully their development in galls. About 26% larvae were killed by insect parasitoids (mainly Torymus quercinus Boh.) and then same proportion of larvae died without any apparent exogenous causes). Insect predators and birds killed 4% larvae on average. It has been found that mortality factors markedly participated in the size, morphological, anatomical and physiognomic differentiation of galls. Gall polymorphism was analysed in detail in the paper. Galls significantly unfavourably affected the size of leaves and thus also photosynthesis.

Zatížení ekosystému středního toku řeky Jihlavy těžkými kovy

Josef Makovský, Petr Spurný, Jan Mareš, Josef Hedbávný, Tomáš Vítek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 255-262 | DOI: 10.11118/actaun201058050255

The monitoring of the contents of heavy metal pollutants: total Hg, Pb, Cd, Cr, Ni, Cu and Zn in fish muscle, water, bottom sediments and zoobenthos was realised in May and July of 2007 on two localities: Vladislav, upstream the Dalešice and Mohelno dam reservoirs (Czech Republic), and Hrubšice downstream them. Samples of fish muscle were taken from chub (Leuciscus cephalus), barbel (Barbus barbus) and brown trout (Salmo trutta m. fario). Water, bottom sediments and zoobenthos samples were taken as representative ones from both localities. The samples were analysed with the apparatus AMA 254, AA-300 and SPECTR AA-30. In water of both sites there was found above-limit (0.1 µg/l) content of mercury (0.99 µg/l Hrubšice, 2 µg/l Vladislav). The bottom sediments in Vladislav were most contaminated by Pb (120.21 mg/kg) and Cr (164.90 mg/kg) and in Hrubšice locality by Ni (90.66 mg/kg). High concentration of Pb (25.84 mg/kg) in Vladislav and of Ni (240.90 mg/kg) and Cr (140.5 mg/kg) in Hrubšice was found in zoobenthos. In the point of view contents of heavy metals in fish muscle tissue, statistically significant (p < 0.05) higher content of Hg was found in barbel and chub from Vladislav (0.155 ± 0.012 mg/kg and 0.163 ± 0.064 mg/kg) in comparison with Hrubšice (0.073 ± 0.035 mg/kg and 0.095 ± 0.082 mg/kg) as similarly as the concentration of Cd in chub (0.062 ± 0.140 mg/kg at Vladislav and 0.006 ± 0.002 mg/kg at Hrubšice), whereas the content of Ni in barbel was statistically significantly higher at Hrubšice (0.175 ± 0.042 mg/kg) compared to Vladislav (0.050 ± 0.017 mg/kg). The last significant difference was found in Pb concentrations, when fish from Hrubšice were more contaminated (concentrations 0.155 ± 0.048 mg/kg in barbel and 0.182 ± 0.110 mg/kg in chub) than the same species from Vladislav (contents 0.050 ± 0.017 mg/kg and 0.064 ± 0.005 mg/kg). In theme of consumption risk of the muscle tissue of fish by FAO/WHO, the Hg was limiting factor at both sites. In the locality Vladislav provisional tolerated weekly intake (PTWI) was 1.94 kg in barbel and 1.84 kg in chub. In the Hrubšice it reached 4.12 kg in barbel, 3.15 kg in chub and 5.51 kg in brown trout.

Chování spotřebitele na trhu s médii

Martin Přibyl, Ladislav Stejskal, Ondřej Dufek, Klára Ondrášková

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(6), 225-234 | DOI: 10.11118/actaun200957060225

The paper deals with a correlation between factors identifying a household representative and frequency of media usage. Particularly it concentrates on the analysis of internet and daily press usage. Internet is a constantly developing communication channel which is increasingly used in the field of marketing communication and contributes to the development of business environment. Due to its characteristics it is an ideal mean for multilingual communication and communication on international markets. The daily press is on the other hand a representative of traditional media. It is perceived by public as a more natural communication channel. The paper seeks an answer to the question which communication channel is more suitable to communicate with a particular target group - press or the internet. The paper tests the correlation between identification factors and frequency of internet and press presence. Testing will be carried out by using a database obtained in a primary research conducted by the Department of Marketing and Trade at the Faculty of Business and Economics, Mendel University in Brno. Results published in the paper are part of research objective, id. code: 62156 48904 "The Czech Republic in the process of integration and globalization and the evolution of agrarian and service sectors in the new conditions of the European integrated market", thematic area 03 "The evolution of trade relationships regarding changes in a life style and purchasing behaviour and changes of business environment in the process of integration and globalization" that is conducted with a financial support of Ministry of Education, Youth and Sports.

Vliv vybraných faktorů pěstování na výnos a obsah dusíkatých látek v zrnu sladovnického ječmene

Petr Babiánek, Petra Vavroušová, Pavel Ryant, Luděk Hřivna, Radim Cerkal

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 19-26 | DOI: 10.11118/actaun201058020019

The objective of the three-year small-plot trial was to assess the effect of the weather of the year, forecrop, variety, form of sulphur (elementary and sulphate) and additional nitrogen fertilising on the yields and the content of N-substances of the malt barley varieties Jersey and Sebastian. The trial was carried out in 2006-2008 at the experimental site of the Mendel University of Agriculture and Forestry in Brno, the Žabčice locality. The Jersey and Sebastian varieties were grown after three different forecrops - winter wheat with ploughed down straw, sugar beet with ploughed down tops and maize for grain with ploughed down straw. The fertilising treatments differed in the form of sulphur (elementary and sulphate) and date of the additional nitrogen fertilising. As the sulphate form we chose ammonium sulphate (40 kg.ha-1 N and 45.6 kg.ha-1 S) and the same amount was supplied in the form of elementary sulphur; nitrogen was in the form of urea. A dose of 30 kg.ha-1 of ammonium nitrate with limestone (ANL) was applied as additional nitrogen fertilising. The results show that the weather conditions of the respective years had an almost 94 % effect on yields. The very strong effect of the weather overshadowed the effect of the forecrop (3.8 %); the effect of the variety was only half that of the forecrop (1.8 %). The form of additionally applied sulphur and nitrogen during cultivation had a relatively little effect on the yields (0.2 %). The forecrop affected the content of N-substances most of all (47.3 %). The quality of barley grain is markedly dependent on the course of the weather of the year (40.1 %); the effect of the variety on the content of N-substances was relatively low (1.6 %). Applications of various forms of sulphur had a small effect on the grain quality (0.01 %), while the effect on additional nitrogen fertilising on the content of N-substances was 8.5 %.

Fytoextrakce těžkých kovů z odpadních kalů rostlinami

Jaroslava Bartlová, Barbora Badalíková, Jan Hrubý, Vasil Gjurov

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 27-34 | DOI: 10.11118/actaun201058050027

In 2008 and 2009, studies made contents of cadmium and lead in the soil and their uptake by non-traditional plants were studied in a small-plot trial. At the same time also the effect of bio-algeen preparations on phytoextraction of heavy metals by these plants was investigated. Experimental plots were established on the reclaimed land after closing down mining operations in the town of Žacléř (North-East Bohemia) where a layer of sewage sludge from a wastewater treatment plant 0.6-0.8 m thick was subsequently applied. The locality is situated in the altitude of 612 m, its average annual temperature is about 6.8 °C and the mean annual precipitations are 857 mm.
Analyses revealed higher concentrations of heavy metals in the applied sewage sludge. The average concentrations of lead and cadmium were 180 mg.kg-1 and 6.89 mg.kg-1, respectively. The experiment had two variants: Variant 1 - sewage sludge without any other substances, and Variant 2 - sewage sludge + bio-algeen preparations (B. A. S-90 or B. A. Root Concentrate). To find the most suitable plant species for the phytoextraction of cadmium and lead, the following non-traditional plants were cultivated in both variants: fodder mallow (Malva verticillata L.), rye (Secale cereale L. var. multicaule METZG. ex ALEF.) and white sweet clover (Melilotus alba MEDIC.). The highest accumulation of cadmium and lead in the aboveground biomass was found out in rye, viz 14.89 mg.kg-1 DM and 14.89 mg.kg-1 DM of Cd and Pb, respectively., As compared with other plants under study, white sweet clover exhibited the significantly lowest capability to extract both heavy metals from soil (viz 0.22 and 3.20 mg.kg-1 DM of Cd and Pb, respectively). A positive effect of bio-algeen on phytoextraction of cadmium and lead was evident in all plants. The highest yield of aboveground biomass was recorded on the plot with white sweet clover with added alginate (496 g.m-2). Of plants under study, the fodder mallow seems to be the most suitable crop for the phytoextraction of both metals (0.35 and 5.87 mg.m-2 of Cd and Pb, respectively).

PROBLÉM DUÁLNÍ STRUKTURY ZEMĚDĚLSKÝCH PODNIKŮ V EVROPSKÝCH TRANZITIVNÍCH EKONOMIKÁCH

Vojtěch Tamáš

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(6), 571-578 | DOI: 10.11118/actaun201058060571

This paper deals with the dual farm structure, with a closer focus on the transitional economies of the EU. There are characterized and analyzed the factors which have a significant impact on both small family farms and the large agricultural enterprises. The part of the analysis is also the demonstration of these factors in transition economies, where the changes manifest themselves most strongly in present agribusiness. Assumptions of the development for agriculture in the early transition period significantly differed from the subsequent actual development of this sector in transition economies. Present a very diverse structure of agricultural holdings in individual economies involves extremes. Significantly different is the size of farms and their organizations. These differences are documented on the example of the Czech Republic, Slovakia and Hungary. An important role in terms of farm size play returns of scale and flexibility. The determinants of flexibility are demonstrated by the small Polish family farms.

Označovanie ovocia a rozdiel medzi domácim a dovezeným ovocím mierneho pásma z pohľadu slovenského spotrebiteľa: prípadová štúdia z nitrianskeho regiónu

Zuzana Šajbidorová, Jozef Lušňák

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(3), 165-172 | DOI: 10.11118/actaun200957030165

Fruit consumption and production in Slovakia was very low for many years and it is still decreasing. Paradoxically, population consume less fruit today as it was in 1990 although the supply of home made and imported fresh fruit has got better.
The aim of the paper is to identify and analyse the attitude and behaviour of Slovak fruit consumer from Nitra region on the basis of questionnaire research. The main task is consumer perception of information about fruit and also difference between home made fruit from Slovakia and imported soft climate fruit from abroad. We have used an association analysis to find out dependence between individual answers and respondent identification characteristics (gender, age, education, residency).
As a result the interest in fruit place of origin depends on the age of respondent and thereby on the previous fruit purchase experience - negative or positive one, respondent opinion of fruit quality class labeling in stores in Slovakia depends on respondents residency, prefering of home made soft climate fruit by its purchase in comparison to imported fruit depends on the age (previous experience) of respondent - consumer.

Mobilní využití digitálních geografických dat v prostředí Apple iPhone

Jiří Kamínek, Martin Klimánek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 89-96 | DOI: 10.11118/actaun201058040089

This article deals with the possible deployment of the Apple iPhone device as mobile geoinformation technology. An examination of the possibilities of the device, the development tools and the Web Mapping Service (WMS) was followed by developing a prototype of an application called WhateverMap. The application uses maps from the WMS, which are available in the field through mobile data communication. The application interface was designed around the User Experience model so that its control is easy to grasp and intuitive. It also features support to the determination of the current location. To make working with the application more comfortable it integrates a database of WMS servers. The user is thus given an overview of all the maps available and can easily add them as desired. The application can be downloaded free of charge from Apple's AppStore on the internet.

Efekt hnojení dusíkem a bórem na výnos a kvalitu řepkového semene

Ladislav Varga, Otto Ložek, Ladislav Ducsay, Peter Kováčik, Tomáš Lošák, Jaroslav Hlušek

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 391-398 | DOI: 10.11118/actaun201058050391

Field trials with winter rape (Brassica napus L. var. napus) variety Rasmus were established in August in the years 2002-2004 at the experimental station in Kolíňany which belongs to the Slovak University of Agriculture in Nitra. In the experiments we explore the effect of supplementary spring topdressing of rape with nitrogen and boron in the BBCH 29-30 stage with regard to the yields of seeds and their qualitative parameters (TSW, content of oil and crude protein). In the experiment we applied DAM-390 (solution of ammonium nitrate and urea, 30% N) at a rate of 30 kg N/ha and Humix Bór (humic acids + N, K, B) at a rate of 0.240 kg B/ha. The different climate conditions in the respective years had a significant effect on yields of rapeseed and ranged as follows: 2003: 1.80-2.29 t/ha; 2004: 2.60-3.35 t/ha; 2005: 2.45-3.29 t/ha. The significant decrease in seed yields in the first year of the experiment was caused namely by the deficit in precipitation in January, February and June 2003 and high temperatures in May and June in the same year. In terms of the individual years and the three-year average the application of Humix Bór itself did not significantly improve the yield and qualitative parameters of seeds compared to the unfertilised control. In a three-year average the application of the N fertiliser alone or in combination with Humix Bór increased seed yields and the crude protein content by 22.4-30.7 % and 4.0-4.9 rel. %, respectively, compared to the unfertilised control. The significantly highest seed yields (2.98 t/ha) were achieved when the plants were treated with a combination of nitrogen and Humix Bór as compared to all the other treatments (2.28-2.79 t/ha). The oil content in seeds increased significantly to 44.1% only when treated with a combined application of DAM-390 and Humix Bór as against the unfertilised control (42.8%). Fertilisation did not change the TSW which ranged only between 4.47 and 4.67 g.

MOŽNOSTI VYUŽITÍ HYPERELASTICKÝCH MATERIÁLOVÝCH MODELŮ V NUMERICKÉ ANALÝZE LISOVÁNÍ DŘEVOTŘÍSKOVÉHO KOBERCE

Václav Sebera, Jan Tippner

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 83-94 | DOI: 10.11118/actaun200957040083

The main goal of the work was to evaluate a possibility of using various hyperelastic material models implemented into ANSYS computational system for the numerical analysis of wood-strand mat pressing or wood-based composites. Subsequently, the most suitable hyperelastic model was used as a material model in compression simulation. Pressing itself was modelled as a contact transient analysis with wood-strand mat being defined as a homogenous and isotropic continuum with the chosen material model. In the analysis only displacement degrees of freedom are considered. Output of the simulation is a contact pressure, which is necessary to apply to compress the mat on the required height. The analysis serves as a take-off platform for further research in wood-based composites pressing process.

Bionomie a cecidogeneze Contarinia petioli (Kieffer) (Diptera, Cecidomyiidae)

Jaroslav Urban

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 259-280 | DOI: 10.11118/actaun201058020259

Recently, the abundant occurrence of galls of Contarinia petioli (Kieffer) was noted on Populus tremula in the Brno region and elsewhere in southern Moravia. The bionomics and cecidogenesis of the gall midge was studied on 5 to 15-year-old aspens in Forest District Bílovice nad Svitavou, Training Forest Enterprise Masaryk Forest in Křtiny in 2007 and 2008. Imagoes fly there at the end of April and at the beginning of May. Females lay eggs in several partial clutches at 1 to 6(10) pieces. About 91% newly hatched larvae settle on petioles of unfolding leaves, about 8% on the bark of terminal parts of shoots and about 1% on leaf blades. By means of sucking the larvae of the 1st and 2nd instars galls are created in the 1st half of May. Larvae of the 3rd instar occur in galls from the 20th May when galls are grown-up. Larvae abandon the galls in the 1st decade of June through an oval hole 0.6 × 0.4 mm in diameter. Galls are on average 6 mm long, 5.4 mm wide and 5.1 mm high. If they are localized within a short distance of each other then often create formations up to 17 × 11 × 9 mm in size. There are 1 to 6(10) chambers in galls and in each of them, only one larva develops. The paper deals in detail with the differentiation of galls including chambers as well as natural enemies of the gall midge. Torymus quercinus Boh., T. cultrans Graham & Gijswijt (Torymidae) and Tetrastichus sp. (Eulophidae) rank among natural enemies of larvae in galls.

Relaxace sil v sýru Eidamského typu během jeho zrání

Šárka Nedomová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 271-280 | DOI: 10.11118/actaun201058050271

The present study was performed to determine the influence of fat content and ripening time on changes in the viscoelastic properties and, separately, in the viscous and elastic properties of Edam cheese, based namely on the results of a stress-relaxation test. In order to obtain some more detail inside on the cheese rheological behaviour a limited number of the mechanical tests under compression has been performed. The significant effect of the loading rate has been demonstrated. The main aim was to describe the experimental results in terms of the semi-empirical Maxwell model, which describe the rheological properties of cheese during ripening. Results suggest that the tested cheeses behave like linear viscoelastic body. The fat content has no influence on the elasticity as well the viscosity of the cheese during its ripening.

PŮSOBENÍ STRESU U VRCHOLOVÉHO MANAGEMENTU A JEHO DOPADY DO ZDRAVOTNÍ A PRACOVNÍ OBLASTI

Dana Maria Staňková, Miloš Drdla

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(6), 235-240 | DOI: 10.11118/actaun200957060235

Within the frame of this paper the key theoretical knowledge to the selected topic is described, the presentation of partial results and discussion on the issue of the psychological aspects of managerial work, focusing on stress and its manifestations are submitted. The aim of this research was to identify the most frequent stress symptoms in the physiological, emotional and behavioral field and to define the main factors which cause them in work and private life terms. For the purpose of this research of stress effects on health area a questionnaire technology of our own design was chosen. For a deeper understanding of sources of an increased psychological stress in managerial activities a technique of interviews with the top managers was used. Research investigation has showed the action of stress on the senior managers, particularly increased during the current economic recession. The most significant signs of stress are manifested in physiological area, especially by fatigue, headache, digestion problems and sleep disturbances, as in the emotional area by anxiety, excessive concern and overall irritability. At the same time stress impacts also the behavioral area, where it has a negative impact to the work and family life. In the course of processing this subject, an absolutely obvious need occurred for a deeper processing of this large area of work stress, which will be subsequently dealing with, and whose output will be, the methodology of anti-stress strategy for HR (Human Resources) managers and Senior Executives of companies to prevent stress, promote health and quality of living conditions in the workplace.

Vliv společné aplikace Promalinu® v různých fenologických fázích pupenů a řezu v diferencovaných vzdálenostech na postranní větvení u tří odrůd třešně (Prunus avium L.) pěstovaných v centrální Chile

Eduardo von Bennewitz, Claudio Fredes, Luisa Gutierrez, Tomáš Lošák

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(2), 45-50 | DOI: 10.11118/actaun201058020045

A study was carried out during 2005 in the Maule Region of Chile (34.56°S, 71.5°W) to evaluate the effect of the co-application of Promalin® at different bud phenological stages and notching at different distances on lateral branching of three sweet cherry cultivars. Treatments significantly increased total feather length in comparison to the untreated control only in the case of 'Bing'. Total feather growth in these cases was more than double that of control trees. On 'Lapins' treated trees, total number of lateral shoots was in most cases significantly increased. In 'Stella' trees, total feather length and total number of lateral shoots were not affected by treatments.

Vliv skladování na obsah aminokyselin v hlízách brambor

Monika Černá, Stanislav Kráčmar

Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(5), 49-56 | DOI: 10.11118/actaun201058050049

The aim of this study was to investigate the effect of storage duration on amino acids content in potato tubers. Tubers of six cultivars were stored for 16 weeks. Crude protein was determined by the Kjeldahl method. The amino acid content was identified after acid hydrolysis; sulphur amino acids were oxidized with the mixture of hydrogen peroxide, formic acid and phenol. The essential amino acids index and chemical score was calculated. The whole egg protein was used as reference protein. The effect of storage duration and cultivar on the total amino acids content was found to be significant in all potato varieties. The level of the total amino acids contents was determined within the range of 80-87%. Similar downward trend was observed in crude protein. The essential amino acids index varied considerably among the potato cultivars, ranging from 42 to 57%. Sulfur amino acids and isoleucin were the limiting amino acids in all the investigated tubers.

VYUŽITÍ LINEÁRNÍHO PROGRAMOVÁNÍ V OPTIMALIZACI OSEVNÍHO PLÁNU ZEMĚDĚLSKÉHO DRUŽSTVA V ČR

Jitka Janová, Pavla Ambrožová

Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(6), 99-104 | DOI: 10.11118/actaun200957060099

The production planning is one of the key managerial decisions in agricultural business, which must be done periodically every year. Correct decision must cover the agriculture demands of planting the crops such as crop rotation restrictions or water resource scarcity, while the decision maker aims to plan the crop design in most profitable way in sense of maximizing the total profit from the crop yield. This decision problem represents the optimization of crop design and can be treated by the methods of linear programming which begun to be extensively used in agriculture production planning in USA during 50's. There is ongoing research of mathematical programming applications in agriculture worldwide, but the results are not easily transferable to other localities due to the specific local restrictions in each country. In Czech Republic the farmers use for production planning mainly their expert knowledge and past experience. However, the mathematical programming approach enables find the true optimal solution of the problem, which especially in the problems with a great number of constraints is not easy to find intuitively. One of the possible barriers for using the general decision support systems (which are based on mathematical programming methods) for agriculture production planning in Czech Republic is its expensiveness. The small farmer can not afford to buy the expensive software or to employ a mathematical programming specialist. The aim of this paper is to present a user friendly linear programming model of the typical agricultural production planning problem in Czech Republic which can be solved via software tools commonly available in any farm (e.g. EXCEL). The linear programming model covering the restrictions on total costs, crop rotation, thresholds for the total area sowed by particular crops, total amount of manure and the need of feed crops is developed. The model is applied in real-world problem of Czech agriculture cooperative and the results of its solution are compared to the real decision made. The applicability of the model in every day agriculture managerial practice in Czech Republic is discussed and its possible enlargement is mentioned.

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