Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2009 (vol. 57), issue 4
Vliv exprese genu pro HPPD na obsah vitaminu E v ječmeni jarním
HPPD gene expression in relation to vitamin E content in spring barley
Michal Kosař, Lumila Holková, Natálie Březinová Belcredi, Jaroslava Ehrenbergerová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 13-18 | DOI: 10.11118/actaun200957040013 
The enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD) has a very important role in the biosynthetic pathway of vitamin E. Its activity influences the final level of tocols in plant tissues. Seven barley cultivars with different vitamin E level were grown under control conditions and activity of HPPD gene was measured four, eight and twelve days after pollination of ear tissues. It was found that activity of HPPD gene corresponded with vitamin E content detected in grains (r = 0.77*). The relationship between the gene activity for HPPD eight and twelve days after pollination and vitamin E content was also confirmed for analyzed cultivars grown in the...
VLIV KOMBINACE BOBU A HRACHU NA PARAMETRY UŽITKOVOSTI BROJLEROVÝCH KUŘAT
Influence of faba bean and peas combination on performance parameters of broilers
Pavla Kratochvílová, Š. Křížová, L. Zeman
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 19-24 | DOI: 10.11118/actaun200957040019
Influence of two varieties of peas and faba bean on performance was observed in grow experiment. Varieties of legumes were different in antinutritive factors levels. ZEKON (peas) and MISTRAL (faba bean) are low tannin varieties, GOTIK (peas) and MERKUR (faba bean) are traditional varieties with high level of antinutritive substances. Experiment was finished in 40 days of age. There were used 900 broilers allotted to 9 groups (100 animals in group). Peas and faba bean was dose to feed mixture on level adequate to 30 g of crude protein per kilogram of feed mixture, the rest of crude protein needed in feed mixture was covered by soya bean meal. The best...
Využití harvestorových technologií těžby dříví v procesně orientovaném prostředí
Application of harvester technologies of timber logging in the process-oriented environment
Pavel Máchal, Luboš Bartoš
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 25-30 | DOI: 10.11118/actaun200957040025
Harvester technologies of timber logging currently represent the high spot of technologies used in forestry for timber harvesting and forwarding. A typical feature of the "harvester-forwarder" combination is production rate, which is many times higher than in the commonly used technology of "power chainsaw-tractor" (Lukáč, T., 2005). Other major features prevailing in harvester technologies include an appreciably high level of work hygiene and a significant reduction of environmental burden, which is certainly beneficial for the environment.Harvester technologies of timber logging are currently an integral part of sustainable forest management.This...
Možnosti využití analýzy cen při rozhodování o nasazení harvestorové technologie
Possibilities of using price analysis in decision making on the use of harvester technology in forestry
Luboš Bartoš, Pavel Máchal, Alois Skoupý
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 31-36 | DOI: 10.11118/actaun200957040031
The concept of harvester technology is understood as a fully mechanized harvesting technology for the purpose of timber logging, which means timber handling, extraction and forwarding or skidding. This complete harvesting technology consists of two different assignments of accommodated, specialized logging machines - harvester and forwarder.This timber harvesting technology currently represents a state-of-the-art technology in logging and transport of timber in forestry. This is because the efficiency of the "harvester and forwarder" combination is several times higher than that of the commonly used technology of "power saw and tractor" (Lukáč,...
Význam procesního modelování pro Školní zemědělský podnik Žabčice MZLU v Brně
Importance of process modelling for the university farm Žabčice of Mendel University of Agriculture and Forestry in Brno
Pavel Máchal
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 37-42 | DOI: 10.11118/actaun200957040037
The University Agriculture Enterprise (UAE) Žabčice is part of the Mendel University of Agriculture and Forestry (MUAF) in Brno and its basic mission is to provide targeted activities for the MUAF in Brno. The UAE Žabčice is unique and quite specific agricultural entity in the Czech Republic, which has been meeting its mission more than 80 years. This fact makes it necessary to cover all processes necessary for the firm to make them more effective, where appropriate, a radical change. The aim of the work is to create a key process "Crop Production in the UAE Žabčice of the MUAF in Brno using the software tool Enterprise Architect, with the assignment...
Chování vybraných stolních tuků při dynamickém zatěžování
Behaviour of selected table fats at the dynamic loading
Šárka Nedomová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 43-54 | DOI: 10.11118/actaun200957040043
The new method of the evaluation of the mechanical behaviour of fats has been designed. This method is based on the evaluation of the fat response to dynamic loading. Dynamic loading has been realized by fall of bar impact. Response function has been represented by the time history of the fat surface displacement. Response of the tested table fats have been evaluated both in the time and frequency domain. Two factors affected rheology of the examined fat products: temperature of the measurement and product origin. The influence of fat content can be described namely in the frequency domain. The results obtained between 14 and 20 °C showed significant...
Odezva Eidamu na nedestruktivní ráz
Response of Edam cheese to non-destructive impact
Šárka Nedomová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 55-62 | DOI: 10.11118/actaun200957040055
The behaviour of the Edam cheese during its maturation under dynamic loading has been studied. The block of tested cheese has been loaded by the impact of an aluminium bar. The force between bar and cheese has been recorded. The surface displacements as well as the surface velocities have been obtained at the different points from the point of the bar impact using of the laser vibrometers. Response functions have been evaluated both in the time and frequency domains. It has been found that the degree of the cheese maturity is well characterized by the attenuation of the surface displacement maximum. This maturation is also described by the maximum...
Odezva bramborových hlíz na rázové zatěžování
Response of the potato tubers to impact loading
Šárka Nedomová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 63-72 | DOI: 10.11118/actaun200957040063
The response of tubers of nine varieties of potatoes to the bar impact have been evaluated. The proposed method enables to obtain force - time record. The response function is represented by the time history of the surface displacement. This function has been recorded using laser vibrometer technique. The main features of the force and displacement function have been found both in the time and frequency domain. It has been found that given method can be used for the detection of the potato tubers damage origin as well as for the differentiation among different varieties of the potatoes. There is also a chance to evaluate the main mechanical characteristics...
Celkový obsah uhlíku a kvalita humusových látek u vybraných subtypů kambizemí
Total carbon content and humic substances quality in selected subtypes of Cambisols
Veronika Petrášová, Jiří Martinec, Ľubica Pospíšilová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 73-82 | DOI: 10.11118/actaun200957040073
Cambisols cover an estimated 45% of agricultural soils in the Czech Republic. We aimed our work at stabile forms of organic carbon and humic substances quality in Cambisols under different types of soil management (grassland and arable soil). Object of our study were the following subtypes of Cambisols: Eutric Cambisol (locality Vatín - arable soil), Eutric Cambisol (locality Vatín - grassland), Haplic Cambisol (locality Náměšť n/Oslavou - arable soil), Leptic Cambisol (locality Ocmanice - grassland), Haplic Cambisol (locality Nové Město na Moravě - arable soil), Haplic Cambisol (locality Přemyslov - Tři Kameny - grassland), Arenic Cambisol (locality...
MOŽNOSTI VYUŽITÍ HYPERELASTICKÝCH MATERIÁLOVÝCH MODELŮ V NUMERICKÉ ANALÝZE LISOVÁNÍ DŘEVOTŘÍSKOVÉHO KOBERCE
Possible use of the hyperelastic material models in numerical analysis of the wood-strand mat compression
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...
Teplotní závislost kinematické viskozity různých druhů motorových olejů
Temperature dependent kinematic viscosity of different types of engine oils
Libor Severa, Miroslav Havlíček, Vojtěch Kumbár
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 95-102 | DOI: 10.11118/actaun200957040095
The objective of this study is to measure how the viscosity of engine oil changes with temperature. Six different commercially distributed engine oils (primarily intended for motorcycle engines) of 10W-40 viscosity grade have been evaluated. Four of the oils were of synthetic type, two of semi-synthetic type. All oils have been assumed to be Newtonian fluids, thus flow curves have not been determined. Oils have been cooled to below zero temperatures and under controlled temperature regulation, kinematic viscosity (mm2/s) have been measured in the range of -5 °C and +115 °C. Anton Paar digital viscometer with concentric cylinders geometry...
Ovlivnění kvality školkařských výpěstků pomocí půdních kondicionérů
Affecting the quality of nursery produce by soil conditioners
Jakub Sloup, Petr Salaš
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 103-108 | DOI: 10.11118/actaun200957040103
In 2006, a field trial was established in two localities. The first one was in Lednice (district Břeclav) at the experimental plot of the Department of Breeding and Propagation of Horticultural Plants, the second one in Stařeč (district Třebíč). As model plants, Acer pseudoplatanus and Quercus robur were used. TerraCottem, Agrosil LR and Hydrogel were tested as soil conditioners. Both species were planted in each locality. The plants were planted out on plots with soil conditioners mentioned above in 4 variants (including the Control variant without soil conditioners) and in 3 replications. Physiological parameters of plants were followed in the course...
Vztahy mezi stádem, plemenem, věkem beranů, hustotou jejich spermatu a motilitou spermií během testu přežitelnosti
Relationships among herd, ram breeds, age of rams, sperm density before diluting and sperm motility during thermal survival test
Ladislav Štolc, Luděk Stádník, Alena Ježková, František Louda
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 109-116 | DOI: 10.11118/actaun200957040109
The objective of this study was to determine the effect of herd, breed, the age of rams, their semen density, and the type of diluter used on sperm motility during a survival test. The total level of sperm activity of 49 rams was evaluated. A statistically significant effect of the herd, breed, the age of the rams, and the density of their semen on sperm motility after 30, 60, and 90 minutes was determined. Significant differences among herds were detected in the level of sperm activity after 90 minutes of the survival test only, P < 0.05. A significant difference (P < 0.05) between breeds was determined only in the case of sperm activity after...
VYUŽITÍ METODY ZALOŽENÉ NA MĚŘENÍ ODRAZIVOSTI ZÁŘENÍ KE STANOVENÍ CITLIVOSTI VYBRANÝCH HYBRIDŮ KUKUŘICE K HERBICIDU CALLISTO 480 SC + ATPLUS 463
Application of a method based on the measurement of radiation reflectance when estimating the sensitivity of selected grain maize hybrids to the herbicide CALLISTO 480 SC + ATPLUS 463
Michal Vondra, Vladimír Smutný
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 117-124 | DOI: 10.11118/actaun200957040117
The application of methods based on measurements of photosynthesis efficiency is now more and more popular and used not only for the evaluation of the efficiency of herbicides but also for the estimation of their phytotoxicity to the cultivated crop. These methods enable to determine also differences in the sensitivity of cultivars and/or hybrids to individual herbicides. The advantage of these methods consists above all in the speed and accuracy of measuring.In a field experiment, the sensitivity of several selected grain maize hybrids (EDENSTAR, NK AROBASE, NK LUGAN, LG 33.30 and NK THERMO) to the herbicide CALLISTO 480 SC + ATPLUS 463 was tested...
VZTAH MEZI VYBRANÝMI KLIMATICKÝMI PRVKY UVNITŘ A VNĚ STÁJE DOJNIC V PRŮBĚHU ROKU
Relation between some climate parameters inside and outside the stable in the course of the year
Lucie Walterová, Lenka Šarovská, Daniel Falta, Gustav Chládek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 125-132 | DOI: 10.11118/actaun200957040125
The objective of the present study was to evaluate the relation between some climate parameters inside and outside the stable in the course of the year. Investigations were carried out from 1 July 2007 to 30 June 2008 at the School Farm in Žabčice. We monitored the following micro-climate parameters: temperature (°C), relative humidity (%) and the temperature-humidity index (THI) inside and outside the stable. We used the statistical programme UNISTAT version 5.1.11 to calculate the average monthly temperatures, relative humidity and the THI inside and outside the stable.Measurements carried out throughout the whole year revealed that the average...
HODNOCENÍ KVALITY JATEČNĚ UPRAVENÝCH TĚL PRASAT V ČESKÉ REPUBLICE
Quality evaluation of the pig carcases in the Czech Republic
Bohuslav Kučera, Miroslav Jůzl, I. Ingr
Acta Univ. Agric. Silvic. Mendelianae Brun. 2009, 57(4), 137-146 | DOI: 10.11118/actaun200957040137
In 1973 was proclaimed the Hybridization program within pig breeding in Czechoslovakia. It was aimed at improving better pork quality and increasing higher nutrition value through meat specialization hybrids. Duroc, Hampshire, Pietrain and Landrace breeds were using in hybridization. Proclaiming the new form meat commercializing of pigs should to ensure better interest of breeders on producing meat specialized hybrids. This form was initiated in EEC since 1985 and Czechoslovakia was prepared to ensure authorized grading assessment methods slaughter-pigs. Since March 2004 the Czech Republic is a member state of the European Union with harmonized legislation...