Relationships between some production traits of selected genotypes of amaranth (Amaranthus L.)
Jana FECKOVÁ, Miroslav HABÁN, Marta HABÁNOVÁ (Slovak Agricultural University, Nitra)
Paper is in English
Several production traits of Amaranth (Amaranthus L.) such as plant height (mm), length of inflorescence (mm),
thousand-seed-weight (TSW) (g), and production of seed per plant (g) were studied. The aim was to establish the relationships between
observed traits in selected genotypes as well as those between genetically given characteristics, an influence of the year of cultivation
(weather conditions) and the above-mentioned traits in order to find the right cultivation types of amaranth. There was high variability of
the material investigated. Weather conditions of the year had an adverse influence on all studied traits, and TSW was found to decline
with plant height. At the same time genetic resources of the lowest height showed the highest TSW. No production trait was significantly
influenced by a height of the plant. TSW was significantly affected by inflorescence length (r0.01=0.4100). The ideotype of grain
plant should be low in height and have high onset of inflorescence above the soil level and a longer erect inflorescence (A. hypochondriacus).
Production of seed per plant was strongly dependent on genetically given characteristics of the genotypes under study (r0.01= .5381).
In particular, TSW was adversely affected by year (r0.01=-0.3320) within the trial, but it usually has no big influence on grain
yield. There was a closer relationship between the productivity of genotypes, which is given by their genetics, a length of inflorescence
and TSW. These findings make it possible to choose adequate genetic resources of grain amaranth for growing in the given conditions on the
basis of external markers
Key words (author): Amaranth, Amaranthus L., genotypes, production traits, weather conditions, variability
Adress: Ing. Jana Fecková, Slovenská poľnohospodárska univerzita, Fakulta agrobiológie a potravinových zdrojov, Katedra rastlinnej výroby, Tr. A. Hlinku 2, 949 01 Nitra, Slovak Republic
e-mail:Jana.Feckova@uniag.sk
Effect of drinking water application of probiotics containing Enterococcus faecium M-74 on growth and carcass traits in turkey
Ludmila CHMELNIČNÁ (Slovak Agricultural University, Nitra)
Paper is in Slovak
The effects of supplementing drinking water with probiotics L-50 containing lactic fermentation bacteria
Enterococcus faecium M-74 as an effective component on selected growth and carcass traits of turkeys up to age of 84 days were
studied. Amounts of the preparation were graduated according to turkey age. A live weight was determined in week periods, selected growth
characteristics at 28, 56 and 84 days of age, and carcass traits at 84 days of age. The probiotics water application was found to have a
slight positive effect on growth of female birds up to 5 weeks and from 9 to 12 weeks of age at a final live weight of 6,473 g and 6,292 g
in the experimental group and the control, respectively. There were statistically significant differences in a length of keel (14.63 cm vs. 13.90 cm),
a half-girth of chest (32.50 cm vs. 27.95 cm) and a length of thigh (17.94 cm vs. 15.55 cm) at 84 days of age in favour of the
experimental birds compared to the control ones. A moderate impact of probiotics was also observed in the carcass yield (80.1% vs. 79.1%),
a percentage of carcass trunk in live weight (74.2% vs. 73.6%), and a proportion of breast muscle on bone in live weight in particular
(26.5% vs. 24.6%).
Key words (author): probiotics, Enterococcus faecium M-74, drinking water, growth of turkeys
Adress: doc. Ind. Ludmila Chmelničná, CSc., Slovenská poľnohospodárska univerzita, Fakulta agrobiológie a potravinových zdrojov, Katedra hydinárstva a malých hospodárskych zvierat, Tr. A. Hlinku 2, 949 76 Nitra, Slovak Republic
Effects of insulin-like growth factor-I and different protein kinases on the regulation of proliferation and steroidogenesis in porcine ovarian cells in vitro
Pavel SANISLÓ, Alexander SIROTKIN, Hans-Jorg SCHAEFFER, Ladislav HETEÉNYI, Juraj PIVKO (Výskumný ústav živočíšnej výroby, Nitra)
Paper is in Slovak
The aim of this work was to study an involvement of insulin-like growth f actor-I (IGF-I) and MAP kinases (MAPK/ERK1,2) in the
regulation of functions of porcine follicular ovarian cells as well as possible mechanisms of the action of these substances. The effects
of IGF-I and MAPK/ERK1,2 blocker (PD098059) and their combination on the expression of proliferation indicators (PCNA and p-34), MAPK/ERK1,2,
protein kinase A (PKA), tyrozin kinase (PhT) and on the secretion of steroids (progesterone-P, androstendione-A, estradiol-E) and IGFBP-3 by
in-vitro cultured porcine ovarian follicular cells were investigated. It was found that IGF-I has the stimulatory influence on PCNA, p-34, PKA, PhT
and MAPK/ERK1,2. IGF-I inhibited the secretion of A, P, E and had no effect on the IGFBP-3 output. PD098059 inhibited the production
of A, E, MAPK/ERK1,2 and stimulated PCNA, p-34, PKA, PhT. The blocker had no influence on P and IGFBP-3, but modified the effects of IGF-I
on A, E, IGFBP-3, PCNA, p-34, PKA, PhT, and MAPK/ERK1,2. These results indicate: 1) a role of IGF-I as a stimulator of ovarian cell
proliferation and a regulator of ovarian steroidogenesis; 2) involvement of MAPK in the regulation of proliferation and of the secretory
activity of ovarian cells and 3) the relationships between MAPK/ERK1,2, PhT and PKA in the mediation of IGF-I effects on ovarian cells.
Key words (author): pig, ovary, IGF-I, steroids, kinases
Adress: Ing. Pavel Sanisló, Výskumný ústav živočíšnej výroby, Ústav genetiky a reprodukcie hospodárskych zvierat, Hlohovská 2, 949 92 Nitra, Slovak Republic
e-mail:endo@vuzv.sk
Production ability and carcass product quality in fattening pigs of defined genotypes offered feed mixtures with a different conten of N-substances
Roman GÁLIK, Pavpl MILLY, Marta GOMBÍKOVÁ, Jozef GARLÍK (Slovak University of Agriculture, Nitra)
Paper is in Slovak
An experiment with four-bred hybrid pigs (female (BuxL) x male (Du x Pn) was conducted to study the effect of feed mixture with a different
level of N-substances (160.3, 172.6 and 191.7 g/kg dry matter (DM)) or amino acids on a content of amino acids in products DM and their
fat properties according to fatty acid content. Pigs were divided into three groups of 10 animals in each (5 females + 5 males) and offered
feed mixtures during the whole fattening period (30 to 105 kg live weight; 105 days). There were no significant differences in muscle DM (
MLD) among experimental groups (P>0.05). With an increasing concentration of N-substances and amino acids in food, amino acid content
in liver DM increased. Differences among groups of pigs were statistically significant in most cases. In terms of the percentage content of
respective fatty acids out of total acids in the fat of pig products there were no statistically significant differences among groups (P>0.05).
A negative, statistically significant relationship (r=-0.653+++) between the content of N-substances in food and a proportion of linoleic acid
in liver fat was revealed.
Key words (author): fattening experiment, group experiment, hybrid of pigs, feed mixture, traits of fattening, carcass quality, chemical analysis of products, amino acids, fatty acids, muscles, liver, fat
Adress: Prof. Ing. Roman Gálik, DrSc., Slovenská poľnohospodárska univerzita, Fakulta agrobiológie a potravinových zdrojov, Katedra výživy, Tr. A. Hlinku 2, 949 76 Nitra, Slovak Republic
Research on the integrated cultivation system of two-rowed barley in the East-Slovak Lowland
Peter FECÁK (Regional Research Institute of Agroecology, Michalovce)
Paper is in English
Malting spring barley (Hordeum distichon L.) is the second most important narrow-row cereal grown in Slovakia.
This particular research was focused on the rationalization of its cultivation system in the specific soil-climatic conditions of the
East-Slovak Lowland by reducing energy and material input with regard to profitable grain yields as well as the environment protection.
A four-year trial was established at two research stations which represented two great soil groups, alluvial and gley alluvial soils.
The preceding crop was a root crop, sugar beet. The soil of this crop was deep ploughed and manured with a dose of 40 1/ha. Three systems
of primary tillage (conventional, minimum, and zero tillage), three seeding rates (300, 400, and 500 viable kernels/m2), and four
doses of NPK-fertilizers (V1 to V4-doses based on soil analyses, V5-unfertilized check) were tested in this multifactorial trial with four
replications. Based on statistically evaluated yield data, it can be stated that a seeding rate of 300 to 400 viable kernels/m2
is sufficient. A rate of 1 kg NPK/ha increased grain yield by 6 kg/ha on average. Statistical evaluation also confirmed that there were
no significant differences between tillage systems. After a preceding crop with a deep ploughed soil, zero tillage is highly recommended.
The most important outcome of this research is that it is possible to decrease input of energy, fertilizers, and seeds used in the
cultivation of spring barley without the risk of lower yields in the soil-climatic conditions of the East-Slovak Lowland.
Key words (author): malting barley, primary tillage system, seeding rate, NPK-fertilization
Adress: Ing. Peter Fecák, Oblastný výskumný ústav agroekológie, Markušova 8, 071 01 Michalovce
e-mail:pfecak@yahoo.com
Chemical control of barley leaf pathogens and influence of fungicides on Fusarium spp. occurence in grains
Kamil HUDEC, Darina MUCHOVÁ, František ONDREJČÁK (Slovak Agricultural University, Nitra)
Paper is in English
During 1999-2001, the fungicides carbendazim + prochloraz, epoxiconazole + tridemorph, spiroxamine + tebuconazole +
triadimenol, kresoxim-methyl + epoxiconazole and azoxystrobin were tested for their efficacy in the control of Blumeria graminis (DC.)E.O.,
Pyrenophora feres Drechsler, Rhynchosporium secalis (Oudem.) J. Davis on leaves and of Fusarium spp. in kernels in the locality Maly Saris.
The highest effectiveness against B. graminis was observed (in downward order) for kresoxim-methyl + epoxiconazole, spiroxamine + tebuconazole +
triadimenol, epoxiconazole + tridemorph, azoxystrobin and prochloraz + carbendazim. The R. secalis infestation was very low during
the seasons evaluated, the most damaging pathogen was P. feres. Seed treatment by carboxin + thiram significantly reduced primary P. feres
seed infection. Only strobilurins were able to provide good fungicide control of P. feres. All the fungicides applied prevented from
yield losses, but only strobilurin application significantly increased yield. A substantial decrease in Fusarium spp. infection of kernels was recorded
after applying strobilurins, epoxiconazole + tridemorph and prochloraz + carbendazim.
Key words (author): barley, fungicides, leaf pathogens, kernels, Fusarium
Adress: Ing. Kamil Hudec, PhD., Slovenská poľnohospodárska univerzita v Nitre, Fakulta agrobiológie a potravinových zdrojov, Katedra ochrany rastlín, Tr. A. Hlinku 2, 949 76 Nitra, Slovak Republic, tel.:+421-37-6508 250
e-mail:Kamil.Hudec@uniag.sk