Agriculture In Nitra Research Articles

Analysis and evaluation of students' results in the subject of Mathematics for Technicians

Integral calculus is a branch of mathematics concerned with the determination, properties, and application of integrals. It is predominantly used in technical applications. Technical engineers, statics, physicists and others use it in their calculations on practice. There was a requirement from practice for technical universities to include integral calculus in their curricula. The subject Mathematics for Technicians is taught at the Department of Mathematics, the Slovak University of Agriculture in Nitra. The content of this subject is to teach its students to calculate indefinite and definite integral. Our research analysed students' knowledge in counting indefinite and definite integral. We used the methodology of evaluation and comparison of test results taken in the 8th week of the term and at the end of the term. The main hypothesis saying that the results of students’ tests taken at the end of the term are better that those taken in the mid- term has confirmed to be correct.

Yield parameters, antioxidant activity, polyphenol and total soluble solids content of beetroot cultivars with different flesh colours

Abstract This study aimed to evaluate yield parameters, antioxidant activity (AOA), total polyphenol content (TPC) and total soluble solids (TSS) in beetroot cultivars with different flesh colours. Field experiments were established at the Slovak University of Agriculture in Nitra in 2016 and 2017. Within the study, 16 beetroot cultivars were tested, including 11 red-fleshed (‘Boltardy’, ‘Boro’ F1, ‘Crosby Egyptian’, ‘Cylindra’, ‘Detroit Globe’, ‘Detroit 2’, ‘Egyptian Turnip Rooted’, ‘Opolski’, ‘Pablo’ F1, ‘Renova’ and ‘Taunus’ F1), 2 yellow-fleshed (‘Boldor’ F1 and ‘Golden’), 2 white-flesh cultivars (‘Albino’ and ‘White Detroit’) and 1 red-white fleshed cultivar (‘Chioggia’). All beetroot cultivars with red flesh colour showed higher AOA and TPC than different-coloured beetroot cultivars. The highest root yield was found in the white-fleshed beetroot cultivar ‘Albino’ (37.80–41.91 t · ha−1). The highest root weight was found in the white-fleshed beetroot cultivar ‘White Detroit’ (362.4–412.1 g). The highest AOA (819.19–972.50 mg TEAC · kg−1 d.w.) and TPC (2,387.70–2,731.00 mg · kg−1 d.w.) were found in the red-fleshed beetroot cultivar ‘Pablo’ F1. Different-coloured cultivars of beetroot were characterised by a lower content of TSS (6.4–8.8 ºBRIX) than cultivars with typical, red flesh colour (7.8–10.8 ºBRIX). Results clearly indicate that cultivar, or flesh colour, is showed as a significant factor influencing the quality of beetroot. Knowing of yield potential and quality of beetroot cultivars is important for growers as well as consumers. Results of this study indicate that white-fleshed cultivars of beetroot are characterised by high yield potential but lower quality, including lower AOA, TPC and TSS.

The impact of packaging on consumer behavior in the private label market – the case of Slovak consumers under 25 years of age

Although there were many consumer behavior studies, their focus was on traditional brands. Despite that, their conclusions and recommendations can serve as a model for private label research. This paper aims to find out the influence of packaging on consumer purchasing decisions in the yoghurt segment. Attention was drawn to Slovak consumers under the age of 25 years. To achieve the aim, survey, structured questionnaire (549 randomly chosen respondents) and blind test (20 respondents) methods were used. For a deeper analysis, four hypotheses were set out and tested using statistical methods of Pearsons’ Chi-Square Test, Friedman test, Mantel-Haenszel Chi-Square Test, Phi Coefficient, Cramer’s V Coefficient and correspondence analysis. The results proved that almost 58% of respondents bought private labels sporadically, over 20% of respondents bought them multiple times a week, and over 18% of respondents bought them once a week. In terms of perceived quality, it can be said that quality of private label products is perceived as good and adequate, they evoke impression of adequate quality at a reasonable price, the decisive factor for their purchase is a combination of reasonable price and quality, and the reasons not to buy are high price, low quality and lack of information about the producer. Regarding the impact of packaging on respondents’ purchasing decisions, it is found that less than 34% of respondents believe that packaging of private label products is unattractive, and up to 33% of respondents think that packaging does not affect them. AcknowledgementThe paper was supported by the research project GA SUA No. 8/2019 “Private labels as the alternative to purchase”, which is solved at the Department of Marketing and Trade, Faculty of Economics and Management, Slovak University of Agriculture in Nitra.

Comparison of exam results in Mathematics at Faculty of Economics and Management, Slovak University of Agriculture in Nitra

Comparison of exam results in Mathematics at Faculty of Economics and Management, Slovak University of Agriculture in Nitra

EFFECT OF FOLIAR APPLICATION OF SELENIUM ON ITS UPTAKE AND YIELDS IN BASILS

Basil is one of the most used spices in Slovakia. Selenium is an essential element for normal growth and development of the organism and because Slovak soils are poor in this element, the various ways of this antioxidant increasing in the food chain has being sought. The aim of the work was to evaluate influence of selenium biofortification on selenium content of Ocimum basilicum - variety ´Dark Green´, which was, in conditions of the Slovakia, well known and wide spread grown, as well as on the opal basils (´Purple Ruffles´ and ´Red Rubin´) and on Ocimum tenuiflorum – Tulsi. The influence of fortification on the yields of basils was also tested. The selenium content and the yields of selected basils were compared in dependence on the selenium fertilization, two terms of harvest and morphological variability. Small-scale field experiment was carried out at the Department of Vegetable Production, Slovak University of Agriculture in Nitra, 2016. Selenium was applied foliar at a dose 50 g Se / ha in the form of sodium selenate. In two harvests the values of selenium built in plants and the economically interesting quantitative data – the yields per ha were evaluated. Statistical methods were used for statistical evaluation by the help of Statgraphics Centurion XVII (StatPoint Inc. USA), with multifactor analysis of variance (ANOVA) and LSD test. Foliar application of selenium had a positive effect of selenium content in case of all tested basils. The yields were also positively affected where values of fresh mass in selenised variants ranged from 1.43 (´Purple Ruffles´) to 13.71 t/ha (Tulsi).

University and Practice – Cooperation in Research and Science: Case study of the Slovak University of Agriculture in Nitra

Purpose: Besides their educational and research functions, universities are currently essential for dissemination of knowledge in innovation processes, thus affecting the economic and social development of their environments. The formalized cooperation of the Slovak University of Agriculture (SUA) in Nitra and its partners in research and science was examined in this context.Methodology/Approach: Formal cooperation of the university with working life partners in terms of their sectoral and geographic affiliation was analyzed in the paper. The Central Register of Contracts and the SUA Internal Register of Contracts were used as principal sources of data. Based on interviews and selected studies conducted in the Slovak Republic we further focused on identification of barriers to the transfer of the results of research into practice.Findings: The paper confirmed cognitive and spatial proximity between SUA and its partners. The sectoral focus of the partners is closely related to the profile of the university. From the spatial point of view, more significant concentration of SUA partners in the region of Western Slovakia was confirmed. We identified several barriers to the transfer of the results of scientific research activities from the university environment into practical life.Research Limitation/implication: We conducted research on the example of one university, thus it is not possible to generalize the results.Originality/Value of paper: The paper analyzes the collaboration of the University in science and research with partners in practical life and identifies weaknesses and barriers to this cooperation.

The evaluation of selected qualitative parameters of sweet potato (Ipomoea batatas L.) in dependence on its cultivar

The sweet potato (Ipomoea batatas L.) is relatively known vegetable species, but it is grown only on small area in the Middle European region. Its cultivars are characterized by different colour of tuber flesh which can be white, beige, yellow, orange and purple. The aim of this study was to determine and compare selected qualitative parameters of tubers (total carotenoids, vitamin C and total soluble solids) among orange, white and purple sweet potato cultivars. The field experiments were established at Slovak University of Agriculture in Nitra in 2016 and 2017. Sweet potatoes were grown by hillock system with using of black non-woven textile for soil mulching. The tuber harvest was realised on the 6th October 2016 and 13rd September 2017. The highest content of total carotenoids was found in orange sweet potato cultivars (78.47 - 122.89 mg.kg-1 fresh weight) and its values were multiple-fold higher in comparison with purple (4.22 mg.kg-1 f. w.) and white (10.71 mg.kg-1 f. w.) cultivars. Orange cultivars were also richer source of vitamin C (246.31 - 325.99 mg.kg-1 f. w.) compared to white (179.66 mg.kg-1 f. w.) and purple (187.75 mg.kg-1 f. w.) cultivars of sweet potatoes. The total soluble solids, expressing mainly sugar content, was higher in purple (10.13 °BRIX) cultivar of sweet potatoes, followed by cultivars with orange (8.52 - 9.72 °BRIX) and white (5.57 °BRIX) tuber flesh. Obtained results showed the significant effect of cultivar, characterized by different tuber flesh colour, on the composition and contribution of sweet potatoes for human health.

Variation of fruits morphometric parameters and bioactive compounds of Asimina triloba (L.) Dunal germplasm collection

The objective of this study was to evaluate the morphological parameters and bioactive compounds (antioxidant activity, total polyphenol, flavonoid, and phenolic acid content) of 6 genotypes of dry Asimina triloba (L.) fruit from Slovak University of Agriculture in Nitra (Slovakia). Genotypes were obtained from the seeds that were sown in the year 2000. Their morphometric parameters were following: fruit weight from 59.00 to 241.19 g, fruit length from 50.14 to 140.11 mm, fruit diameter from 37.55 to 64.67 mm, number of fruits per cluster from 2 to 8, seed weight from 0.06 to 1.80 g, seed length from 16.33 to 29.11 mm, seed width from 9.56 to 18.33 mm, seed thickness from 4.98 to 9.75 mm, number of seeds in fruit from 4 to 16. The shape indexes of fruits were found ranging from 1.53 to 2.16. The variability of important is the average seeds weight from 7.40 to 35.61%, fruit weight from 14.84 to 32.95%, number of fruits per cluster from 18.21 to 32.54% and a number of seeds in fruit from 13.49 to 27.72%. The other characteristics are more or less stable. Total polyphenol content ranged from 22.13 to 37.36 mg GAE per g, total flavonoid content from 15.10 to 32.03 mg QE per g and phenolic acids content from 0.23 to 0.76 mg CAE per g. All tested samples exhibited DPPH radical scavenging activities with values from 2.84 to 7.04 mg TEAC per g. Antioxidant activity by molybdenum reducing antioxidant power method ranged from 97.25 to 275.41 mg TEAC per g of dry matter. Differences between the genotypes were significant in all observed parameters. This species is potential for propagation and practice used in the Slovak Republic.

Prevalence of gastrointestinal parasites of red deer from Protected Landscape Area Štiavnické vrchy

Count of red deer in some areas of Slovak republic exceeds standard count. To these areas belongs as well Protected Landscape Area Stiavnicke vrchy (N48°24'42'' E18°52'21''). High count of is a risk for spread of viral, bacterial as well as parasitic diseases. The aim of this study was to determined and evaluated prevalence of gastrointestinal parasites of red deer (Cervus elaphus) from Protected Landscape Area Stiavnicke vrchy in year 2016. Monitoring was realized through cooperation between Department of Veterinary Sciences at Slovak University of Agriculture in Nitra and District Veterinary and Food Administration in Zvolen as well as with Hunting Associations acting in area of Stiavnicke vrchy. Total 120 faecal samples (10 from each month of the year 2016) was analysed using flotation method and eggs and oocysts were identified. Highest prevalence was detected by Trichostrongylus axei, Eimeria spp. and Spiculopteragia boehmi. Prevalence of endoparasites is affected by age structure of red deer and then by using antiparasitics, climatic condition. Result of these was, that prevalence of total gastrointestinal parasites was lowest during months January to March, when Hunting Associations realised regular worming. The highest prevalence of total gastrointestinal parasites was in months July to December, when the relative humidity is higher and to red deer population belongs as well new offspring, which has high predisposition to gastrointestinal parasites.

Knowledge of mathematics at the Slovak University of Agriculture in Nitra in the context of history of planar curves

Knowledge of mathematics at the Slovak University of Agriculture in Nitra in the context of history of planar curves

Nutritional value of hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) in different periods

Article Details: Received: 2018-07-31 | Accepted: 2018-10-18 | Available online: 2018-10-31 https://doi.org/10.15414/afz.2018.21.04.197-200 The aim of this study was to determine the nutritive value of hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2). Rumex OK 2 can be considered as a technical or energetic plant for renewable production of biomass or as a feed as source of nutrients for animals. In this study two harvestings were planned, firs cut was realised in June (growth from March to June) and second cut was realised in November (growth from July to November). Samples of Rumex OK 2 plants were collected in the 20 th day of the month in March to June and in September to November. Concentration of nutrients were detected according to Regulation no. 2145/2004-100. Fresh Rumex OK 2 samples from March 7.42%, April 8.71% and September 4.89% had very low concentration of dry matter (DM). On the other hand samples from March, April, September and October had high concentration of crude protein in range from 31.42 to 24.54% of DM. From start of growth in spring to time of firs cut in June increased both concentration of dry matter from 7.42 to 56.62% and concentration of crude fibre from 14.86 to 47.38% of DM. Concentration of fat in Rumex OK 2 is low and similar to that of maize plant or alfalfa, whereas concentration of nitrogen free extract in Rumex OK 2 plant is similar only to alfalfa. Results of this article bring compact view over nutritional characteristic of Rumex OK 2, which can be according to gained results about nutritional value used as a source of nutrients in animal nutrition, or as a source of renewable biomass for bioenergy production. Keywords: Rumex OK 2, months, nutrients, fiber complex References BOCKHOLT, R. and KANNEWURF, B. (2001) Rumex obtusifolius in peatbog at Mecklenburg-Vorpommern (widening, forage quality, ensilability, force out by extensiveness). In 45. Jahrestagung AGF, 23.–25. 8. 2001, Gumpenstein, pp. 49–51. (in German). DERRICK, R.W. et al. (1993) Intake, by sheep, and digestibility of chickweed, dandelion, dock, ribwort and spurrey, compared with perennial ryegrass. The Journal of Agricultural Science, vol. 120, no. 1, pp. 51–61. Doi: https://doi.org/10.1017/S0021859600073585 GALIK, B. et al. (2016) Nutritional characteristics of feeds. Nitra: Slovak University of Agriculture in Nitra (in Slovak). HEJDUK, S. and DOLEŽAL, P. (2004) Nutritive value of broadleaved dock (Rumex obtusifolius L.) and its effect on the quality of grass silages. Czech Journal of Animal Science, vol. 49, no. 4, pp. 144–450. Available from: http://www.agriculturejournals.cz/publicFiles/53197.pdf HRIC, P. et al. (2018) The changes of the assimilation pigments content of turf Festuca spp. leaves after application of different nutrition forms. Acta Fytotechnica et Zootechnica, vol. 21, no. 1, pp. 6–10. Doi: https://doi.org/10.15414/afz.2018.21.01.06-10 JURACEK, M. et al. (2012) Nutritional value and ensilability if maize hybrids. Nitra: Slovak University of Agriculture in Nitra (in Slovak). JURACEK, M. et al. (2011) Laboratory protocols. In GALIK et al. (2011) Biotechnology and animal food quality – Part II. Animal food quality. Nitra: Slovak University of Agriculture in Nitra, pp. 122–133. KOVAR, P. et al. (2017) The influence of various dose of nitrogen on botanical composition of turfs on the basis of drought-tolerant fescues cultivated under conditions without irrigation. In Journal of Central European Agriculture, vol. 18, no. 2, pp. 494–514. Doi: https://doi.org//10.5513/JCEA01/18.2.1922 PETŘIKOVA, V. (2012) Forage plant – Rumex OK 2. [Online]. Retrieved 2018-07-31 from: https://biom.cz/cz/odborneclanky/krmna-plodina-rumex-ok-2 (in Czech). PETRIKOVIC, P. et al. (2000) Nutritional value of feeds. Nitra: VUŽV (in Slovak). RAKHMETOV, D. (2018) Non-traditional plant species for bioenergetics. Nitra: Slovak University of Agriculture in Nitra, 103 p. Doi: https://doi.org/10.15414/2018.fe-9788055218557 (in Russian). REGULATION of the Ministry of Agriculture of the Slovak republic no. 2145/2004-100 about sampling of feeds, laboratory testing and evaluation of feeds. ROLINEC, M. et al. (2018a) Energy content of hybrid Rumex patientia L. × Rumex tianschanicus A.Los. (Rumex OK 2) samples from autumn months. Acta Fytotechnica et Zootechnica, vol. 21, no. 1, pp. 20–23. Doi: https://doi.org/10.15414/afz.2018.21.01.20-23 ROLINEC, M. et al. (2018b) Energy content of hybrid Rumex patientia L. × Rumex tianschanicus A.Los (Rumex OK 2) samples from spring months and June. Acta Fytotechnica et Zootechnica, vol. 21, no. 2, pp. 60–62. Doi: https://doi.org/10.15414/afz.2018.21.02.60-62 SIMKO, M. et al. (2010) Saccharides in ruminants nutrition. Nitra: Slovak University of Agriculture in Nitra (in Slovak) TRINACTÝ, J. (2013) Evaluation of feeds for dairy cows. Pohořelice: AgroDigest (in Czech). USŤAK, S. (2007) Cultivation and use of fodder sorrel in condition of Czech Republic. Prague: Crop Research Institute. Available from: http://www.vurv.cz/files/Publications/ISBN978- 80-87011-26-3.pdf (in Czech).

The Support of Agricultural Land Through the “Central European Initiative on Agricultural Land Protection”

Abstract The protection of the qualitative aspects of agricultural land is in the interests of both Slovakia and the European Union. Several policy documents have emerged in the European Union over the last few years, however, they have not been legally binding, as the EU Member States refuse all binding legal acts in this area. Therefore, solving the problem of agricultural land protection is left to the exclusive competence of the EU Member States. On the other hand, problems related to agricultural land cross the borders of states and that is why the Department of Law, Faculty of European Studies and Regional Development, Slovak University of Agriculture in Nitra submitted an international research project under the Erasmus + program, Key Action 3: Jean Monnet entitled “Central European Initiative on Agricultural Land Protection”. The aim is to strengthen the dialogue between key stakeholders in the protection of agricultural land in Central Europe what will have a positive impact on the achievement of the EU agri-environmental and food policy objectives.

Impact of Organic Fertilizers on Morphological and Phenological Properties and Yield of Tomatoes

Abstract The field trial was carried out in 2016 and 2017 on the grounds of the Botanical Garden of the Slovak University of Agriculture in Nitra. The aim of the paper was to test the impact of new organic fertilizers from Company Rokosan on the yield parameters and the morphological and phenological properties of tomatoes. In the experiments, we observed two determinant varieties, namely ‘Brixol F1’ and ‘Uno Rosso F1’. We used the bulk organic fertilizer Rokosan P, designed for fruiting vegetables, and the liquid fertilizer Rokohumin Z. Both forms of fertilizers are produced as organic biomineral fertilizers, their main ingredient being keratin. They contain 9% N, 9% P2O5, 9% K2O, 3% MgO and trace elements. The total harvest in the control variant without fertilization was the lowest compared to the fertilized variants. The second variant was fertilized with the Rokosan P fertilizer, and the harvests were in both years and in both varieties higher than in the variant 1. The third variant was fertilized with the Rokohumin Z, the liquid fertilizer and achieved the best crop yields per plant. For the ‘Uno Rosso F1’ the best total harvest weight was 7.2 kg per plant in 2016 and 8.96 in 2017. For the ‘Brixol F1’, the highest harvest was 8.14 kg per plant in 2016 and 9.24 kg in 2017. In terms of yields and the number of fruits, combined fertilization with the bulk fertilizer Rokosan P and the liquid fertilizer Rokohumin Z reached the second highest values.

Drawbar Parameters of Tractor with Prototypes of Driving Wheels and Standard Tyres

Abstract The paper presents the main drawbar parameters of tractor (drawbar pull, drawbar power and wheels slip) operating in a grass plot and evaluates the utilization of specially modified tyres with spikes. These prototypes of driving wheels were designed at the Department of Transport and Handling of the Slovak University of Agriculture in Nitra. The designed mechanism with spikes is mounted on standard tractor tyres, in which grooves were made. Spikes are hidden in grooves during transportation on a route. On the grassy landscape or soil, the spikes are ejected in order to improve the drawbar parameters. During operation, the drawbar pull and the rotation speeds of wheels were measured, whereupon the wheel slip was calculated. Results show the highest increase in tractor speed at the second gear and high load in utilized prototypes of the driving wheels (1.89 km·h-1) in comparison to standard tyres (1.10 km·h-1). Measurements also demonstrate the highest improvement of drawbar power under the aforementioned conditions in case of tractor with prototypes of driving wheels (1,719.87 W) in comparison with tractor using the standard tyres (1,061.57 W).

Energy content of hybrid Rumex patienta L. x Rumex tianschanicus A. Los. (Rumex OK 2) samples from autumn months

Energy content of hybrid Rumex patienta L. x Rumex tianschanicus A. Los. (Rumex OK 2) samples from autumn months

Financial literacy of students of the Slovak University of Agriculture in Nitra

Financial literacy of students of the Slovak University of Agriculture in Nitra

Nutritional value and fermentation characteristics of silage made from hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) in different months during the year

Nutritional value and fermentation characteristics of silage made from hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) in different months during the year

Energy content of hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) samples from spring months and June

Article Details: Received: 2018-05-26 | Accepted: 2018-06-26 | Available online: 2018-06-30 https://doi.org/10.15414/afz.2018.21.02.60-62 Aim of this study was to determine the gross energy concentration of fresh, wilted and ensiled Rumex OK 2 ( Rumex patientia L. x Rumex tianschanicus A.Los.) from spring months and June. Samples were collected in spring months and June of the year 2018. The plant of Rumex OK 2 consist in March mainly from rosette of leaves and the stalk is not higher than leaves, from April is stalk higher than rosette of leaves. The height of Rumex OK 2 during analysed months was following, March 60.96 ± 5.22 cm; April 114.70 ± 35.15 cm, May 168.31 ± 39.74 cm and June 197.41 ± 48.44 cm. Rumex OK 2 silage was made from wilted matter, with or without of addition of dried molasses. Gross energy was determined as the heat released after combustion of a sample (Leco AC 500) in MJ per kilogram of dry matter (DM) of the sample. The dry matter and gross energy concentration of fresh Rumex OK 2 increased during study, dry matter from 7.42% in March to 56.97% in June and gross energy from 18.00 MJ.kg -1 of DM in March to 18.88 MJ.kg -1 of DM in June. Statistically significant (P 0.05). From all analysed Rumex OK 2 samples the highest concentration of gross energy had silage from May with addition of dried molasses, 19.04 MJ.kg -1 of DM. The utilisation of Rumex OK 2 from spring months can by neither for bioenergy production as a source of renewable energy, or after evaluation of nutritive value as a source of energy and nutrients in animal nutrition in form of pasture and silage. Rumex OK 2 from summer months seems to be utilized only as a source of heat via direct combustion. Keywords: Rumex OK 2, silage, gross energy, dry matter References BAZHAY-ZHEZHERUN, S. and RAKHMETOV, D. (2014) Nutritional value of shchavnat. Food Industry [Online]. no. 16, pp. 15-19. Retrieved 2018-06-13 from http://dspace.nuft.edu.ua/jspui/bitstream/123456789/24166/1/2.pdf (in Ukrainian). Biro, D. et al. (2014) Conservation and adjustment of feeds. Nitra: Slovak University of Agriculture in Nitra (in Slovak). GALIK, B. et al. (2016) Nutritional characteristics of feeds. Nitra: Slovak University of Agriculture in Nitra (in Slovak). HEJDUK, S. and DOLEŽAL, P. (2004) Nutritive value of broad-leaved dock (Rumex obtusifolius L.) and its effect on the quality of grass silages. Czech Journal of Animal Science, vol. 49, no. 4, pp. 144- 450. HEJDUK, S. and DOLEŽAL, P. (2008) Effect of broad-leaved dock (Rumex obtusifolius L.) on grass silage quality. In Acta universitatis agriculturae et silviculturae mendelianea brunensis, vol. 56, no. 5, pp. 75-80. doi: https://doi.org/10.11118/actaun200856050075 HRIC, P. et al. (2013) The influence of mycorrhizal preparations on the growth and production process of turf under non-irrigated conditions. Acta Fytotechnica et Zootechnica [Online], vol. 16, no. 1, pp. 1–4. Retrieved 2018-06-13 from http://www.acta.fapz.uniag.sk/journal/index.php/on_line/article/view/58 HRIC, P. et al. (2018) The changes of the assimilation pigments content of turf Festuca spp. leaves after application of different nutrition forms. Acta Fytotechnica et Zootechnica, vol. 21, no. 1, pp. 6-10. doi: https://doi.org/10.15414/afz.2018.21.01.06-10 PETŘIKOVA, V. (2006) Biomass from energy plants. [Online]. Retrieved 2018-06-13 from https://biom.cz/cz/odborne-clanky/biomasa-z-energetickych-rostlin (in Czech). ROLINEC, M. et al. (2018) Energy content of hybrid Rumex patientia L. x Rumex tianschanicus A.Los. (Rumex OK 2) samples from autumn months. In Acta Fytotechnica et Zootechnica, vol. 21, no. 1, pp. 20-23. doi: https://doi.org/10.15414/afz.2018.21.01.20-23 SKLADANKA, J. et al. (2014) Forage production. Brno: Mendel University in Brno (in Czech). USŤAK, S. (2007) Cultivation and use of fodder sorrel in condition of Czech Republic. Prague: Crop Research Institute (in Czech).

Assessment of competences acquired via CLIL in selected subjects at the Slovak University of Agriculture in Nitra

Assessment of competences acquired via CLIL in selected subjects at the Slovak University of Agriculture in Nitra

The investigation of alfaalfa effect on the activity of superoxide dismutase in chicken meat in dependence on time storage

This study was conducted in order to monitor the effect of adding lucerne meal to chicken feed mixtures. The experiment was conducted at the Department Food Hygiene and Safety, Faculty of Biotechnology and Food Science, Slovak University of Agriculture in Nitra. Chickens for meat production - final type Cobb 500 were used in the experiment. Chickens were placed in boxes all together for one group at the beginning of the experiment and from 14 days of age chickens were divided individually into floor enriched cages. Feeding of chickens lasted 38 days. The experiment was carried out without sex segregation. For the production of a feed composition was used alfalfa (Medicago sativa) as lucerne meal, which was added to the feed at a rate of 4%, namely: starter (HYD-01), growth (HYD-02) and final (HYD-03). The control group did not include the addition of lucerne meal. Chickens were fed ad libitum. Chickens were slaughtered after completion of feeding and the meat samples were taken for analysis. The collected samples were stored at -18 °C. Collected samples of meat were analyzed after slaughter chickens at time intervals of 6, 12 and 18 months. In the experiment was monitored the content of supeoxid dismutase in the chicken meat depending on the length of storage time. Superoxide dismutase content was increasing by storage time, while there were some statistically significant differences between groups.