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Theses collection of the Faculty of Agricultural and Food Sciences and Environmental Management. The collection was started in 2018.
At the University of Debrecen, in accordance with the 2022 amendment to the 2011 Higher Education Act, student theses are only accessible from devices connected to the University's Eduroam WiFi network or from a university IP address.
“The thesis or diploma work of a student who has successfully passed the final examination shall be stored in full in the academic system of the higher education institution, and a record shall be maintained thereof. The stored theses and diploma works – with the exception of parts classified as confidential in accordance with the relevant legislation – must be made accessible and searchable without restriction through the academic system.” Further info on the National Higher Education Act in Hungarian: Felsőokt. tv. (új) - 2011. évi CCIV. törvény a nemzeti felsőoktatásról - Hatályos Jogszabályok Gyűjteménye.
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Tétel Korlátozottan hozzáférhető Creating a Web-Geodatabase for precision agriculture in Nyírbátor, HungaryChowdhury, Mohammad Mahmudul Hasan; Nagy, Attila; Fehér, Zsolt Zoltán; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis thesis focuses on the creation of a web geodatabase for precision agriculture in Nyírbátor, Hungary, utilizing geostatistical analyses. The study begins with an introduction outlining the objectives and significance of the research, followed by a comprehensive literature review covering various GIS-related topics. The materials and methods section describes the study area, workflow, and algorithms employed, with the web geodatabase created using GeoNode. The results and discussion section presents the user interface and functionalities of different sections, including Home, About, Data, Maps, GeoStories, and Dashboards. The conclusion highlights the limitations of the study, such as the lack of sufficient literature sources, unorganized data sets, and resource constraints. Despite these challenges, this thesis contributes to the field of precision agriculture by developing a web geodatabase that holds potential for future research and analysis. Overall, the study demonstrates the value of utilizing web geodatabases in precision agriculture and offers a framework for future investigations in this area.Tétel Korlátozottan hozzáférhető The effect of washing for the shelf-life parameters of spinach (Spinacia oleracea L.)Shahriyari Ansaroudi, Rana; Karaffa, Erzsébet Mónika; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarAs a member of the Goosefoot family, spinach (Spinacia oleraceae L.) is widely recognized for its vivid green foliage and multipurpose nature in the realm of food. It is highly regarded for its nutritional density, which comprises significant quantities of phytonutrients, vitamins, and minerals. The produce business commonly utilizes sodium hypochlorite or chlorine solutions as the primary disinfection agents. Nevertheless, they generate chlorinated by-products that have the potential to be harmful to people (Pahariya et al. 2022). So, the contemporary food industry's transition towards minimally processed ingredients has emphasized the criticality of prolonging the shelf life of spinach while preserving its nutritional value and freshness. Nevertheless, there are notable obstacles that have emerged regarding the presence of microorganisms, particularly those generated by harmful bacteria like Salmonella and Escherichia coli. The aim of this thesis was to assess the efficacy of using a 0.5% citric acid solution to wash spinach in order to reduce microbiological contamination and enhance shelf-life characteristics, therefore maintaining quality attributes during storage. By doing so, it attempts to fill important gaps in industry practices and consumer safety and offer empirical support for the implementation of sustainable preservation methods. Moreover, it addresses the changing demands of industry stakeholders and consumers. The research entailed the utilization of diverse techniques to prepare spinach leaves for microbial analysis. The leaves were washed with citric acid and sterile water, dried, and stored at different temperatures. Enumeration of yeast and molds, detection of E. coli and coliforms, and determination of the total microbial population comprised the microbial investigations. Total bacterial growth was determined using the pour plate method and PCA media culture; dishes containing fewer than 150 colonies were chosen for enumeration. whereas the spread-plate technique was utilized for determining yeast and mold content with DRBC media culture. the population of E. coli was determined using TBX media culture and the use of the pour plate method. The chlorophyll meter SPAD-502 was employed to determine the relative chlorophyll content of spinach. The TA.XTPlus Texture Analyzer was employed to ascertain the tensile strength and firmness of spinach leaves, attributes that are indicative of their freshness. Carotenoids, chlorophyll a, and chlorophyll b content were measured utilizing spectrophotometrically at wavelengths of 480, 647, and 664 nanometers. The outcomes of the data analysis, which was conducted with SPSS, were contrasted through a variety of tests like the Kruskall-Wallis test. The initial significant reduction in total microbial contamination was observed on day zero and also during storage until the 4th day, attributed to citric acid's antimicrobial properties. However, the efficacy of citric acid treatment declined over time, ultimately failing to have any noticeable effect on microorganisms by the seventh day of storage. Regarding yeast and mold content, the reduction in fungal contamination facilitated by citric acid treatment was at a significant level compared to both control and water-washed samples on the zero-day of analysis. However, the extent of this reduction fell short of one lg cfu/g, failing to achieve the requisite reduction to meet the accepted contamination level. However, this disinfection was effective only until the 4th day and then waned afterward. The study also found that citric acid could decrease E. coli contamination immediately after washing but the reduction is not significant. The disinfection effect of this organic acid on E. coli disappears during storage at 12°C. The presence of citric acid did not have a noteworthy impact on the SPAD value of leaves. However, when considering the influence of time and storage duration, increases in the SPAD value of spinach leaves were found. Both unwashed and cleansed samples exhibited a reduction in leaf elasticity throughout the storage period. Throughout the duration of storage, the control samples exhibited a substantial reduction in elasticity than citric-washed samples. Therefore, citric acid emerges as a prospective substitute technique for the cleansing and disinfection of spinach leaves. Carotenoid content increased continuously in the "unwashed" treatment group, suggesting that citric acid might also affect the storage stability of carotenoids. Regarding the discoveries regarding chlorophyll, no significant differences were observed among the control and treated samples during the study period and the full storage term. The average concentration of chlorophyll "b" in spinach leaves remained constant during storage, however, the trend varied for samples that were subjected to citric acid washing. This study provides a comprehensive analysis of the impact of citric acid treatment on the quality of spinach maintained at low temperatures. The analysis takes into account sensory qualities, biochemical composition, and microbiological contamination, resulting in a clear understanding of the many effects of citric acid treatment. The primary aim of this research study was to evaluate the antimicrobial effectiveness of citric acid against common microbial contaminants found in perishable agricultural products, such as E. coli, yeast, and viable bacterial count on spinach leaves. This assessment was conducted both immediately after washing and during a 7-day storage period at a temperature of 4°C. In general, citric acid exhibited satisfactory efficacy in regulating the overall microbial count, as well as yeast and fungi, in spinach samples during refrigerated storage (4±1 C for seven days). Nonetheless, at 12 °C, there was no significant reduction in E. coli. Furthermore, except for insignificant decrease of texture, there were no statistically significant distinctions or adverse effect observed in terms of sensory quality between samples treated with CA, control, and water-rinsed samples. Hence, a single-step cleansing process utilizing 0.5% citric acid (2 minutes at 25 degrees Celsius) proves to be an efficacious, viable, and organic produce-compatible disinfectant for spinach leaves. Moreover, it may serve as a substitute for their conventional cleaning and disinfection technique. The findings of our study indicate that washing methods and the condition of storing can affect its respiration rate, metabolic processes, tissue integrity, and sensory quality. However, it was found that using CA treatment can effectively control foodborne pathogens on fresh spinach leaves immediately following citric acid washing and can maintain its effectiveness for up to four days of storage without negatively impacting the quality of the spinach leaves (Zhou et al. 2023). To improve the effectiveness of citric acid in extending the freshness of spinach leaves, the study suggests implementing the following measures: concentration optimization, evaluation of pre-treatment methods, assessment of integrated approaches, analysis of microbial diversity, and consumer acceptability studies.Tétel Korlátozottan hozzáférhető Hazard analysis and chemical risk assessment in chocolate productionWahbe, Razan; Czipa, Nikolett; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarChocolate is celebrated not only for its delightful flavor but also for its soothing effects and health benefits, including its high antioxidant content. Its production is largely based in tropical regions, particularly West Africa, and involves critical quality control measures such as Hazard Analysis and Critical Control Points (HACCP) to ensure safety and quality during manufacturing, specifically in the context of milk chocolate production. In a study examining milk chocolate, 11 samples from various manufacturers and countries were analyzed for their elemental composition, focusing on both macroelements (like Ca, K, Mg) and microelements (such as Cu, Fe, and Zn). The study found that the concentration of macroelements was highest in chocolate from brand 7, while brand 11 had the lowest levels; similarly, brand 8 had the highest microelement concentration, with brand 11 again having the lowest. Copper and phosphorus were identified as having the highest nutritional contributions among the elements analyzed, while zinc contributed the least. The risk evaluation from the study indicated that all chocolate samples had safety margins, suggesting that consuming even three bars does not pose significant health risks, thus affirming the safety of these milk chocolate products.Tétel Korlátozottan hozzáférhető Comparison of physicochemical parameters and element contents of different fruit juicesMakhchoun, Yousra; Czipa, Nikolett; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe aim of this thesis was to evaluate the quality and physicochemical characteristics (Vitamin C, total phenolic and flavonoid content, pH value) and element content (Ca, K, M, Na, P, S, Al, B, Cu, Fe, Sr and Zn) of fruit juices (Peach, Apple, Tomato, Orange) and to find the healthiest juice product based on the availability of vitamins and minerals.Tétel Korlátozottan hozzáférhető Potential use of a landscape level integrated management tool for measuring the progress towards sustainabilityGarcia Torres, Sergio; Szőllősi, Nikolett; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarSustainable integrated management at the landscape scale is increasingly becoming paramount for the private, and public sectors, as these sectors recognize the high relevance of promoting integrated and collaborative management in their operating areas and territories. There has been no attempt to apply this approach in the current sustainability reporting frameworks. this paper aims to run a trustful assessment at the Hétszölö viticulture company to make sustainability claims. This paper applies a new way of reporting sustainability by selecting and assessing suitable indicators within the Ecosystem, Human well-being, and Production pillars depending on the landscape context and conditions, followed by a performance metric selection, prioritization process, and sustainability claiming. Our results portray that out of 21 indicators including core and landscape-dependent indicators in total 9 were determined as applicable, likewise, concerning metrics selection, 5 performance metrics were defined as required, 2 were recommended and 1 was optional. The company´s top prioritized indicators are ecosystem restoration (1.06 % of restored areas nationwide), household income (0.3 % nationwide = < $2.5/day), and health and nutrition (<2.5 % = 42500 children).it is ultimately given some claims that actions must be taken in these prioritized metrics and make positive progress toward sustainability.Tétel Korlátozottan hozzáférhető The effects of dietary supplementation of arginine, selenium, vitamin E and yeast on the performance of primiparous sows, and their pigletsWafana, Ivan; Szabó, Csaba; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarIn this thesis, the effect of organic selenium and vitamin E, yeast strain Saccharomyces cerevisiae - Levucell SB Titan, and Arginine on the sows’ body productivity, body condition and growth rate of piglets, were evaluated. Data from the sows and piglets was collected in four categorical phases starting from the period of gestation, farrowing, lactation, and weaning. The average performance of the sows and piglet attributes to determine the piglets’ immune competence and survivability was analysed using a generalised linear model of SAS Ondemand for Academics (SAS Institute inc, Cary, NY, USA) and the mean differences were tested by Tukey test. Average data was collected on the performance of the sow and piglet parameters like the sow feed intake, sow live weight at the start, sow live weight at weaning, sow backfat at the start of the experiment, sow backfat at the weaning period and the piglet parameters such as the number of total piglets born, number of piglets born alive, number of still born piglets, number of mummies born, number of piglets at egalization, number of piglets at weaning, piglet weight at birth, piglet average daily gain, piglet weight at egalization, piglet weight at weaning. The findings in this study revealed that dietary manipulation of the sows’ diet with organic selenium and vitamin E, yeast strain Saccharomyces cerevisiae - Levucell SB Titan, Arginine Amino acid did not have a significant effect on the sows’ productivity, body condition and the growth rate of piglets.Tétel Korlátozottan hozzáférhető Production and testing of nanofilter for yougurt and air filtrationAhmed, Waseem; Prokisch, József; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarWe developed an easy-to-use system for the production of nanofibers and non-woven fabric from it. We proved that this filter efficiently removes the particles from water, air, and yogurt. For nanofiber production, the applied polyvinyl butyral (PVB) is a suitable polymer. The PVB nonfilter is applicable for water filtration, after the filtration we can obtain bacterium-free water, which could help in the case of natural disasters and can be applied in nature tours. The biggest challenge in technology is the development of the industrial size of production. For this, we have to increase the speed of production by at least 100 times faster.Tétel Korlátozottan hozzáférhető Investigating the potential of the introduction of sustainable solid waste management in Lao PDRYangchengky, Sousisark; Magyar, Tamás; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarInvestigating the potential of introducing sustainable solid waste management practices is crucial.This study aims to quantify and qualify municipal solid waste in Lao PDR using a local household of six adults and two children as an example. By considering the waste hierarchy, the study promotes sustainable waste management. Eight waste samples were collected and sorted into 13 categories based on composition and the size of each categoryTétel Korlátozottan hozzáférhető Biological control of chestnut blight disease using hypovirulent strains of the causal agent “Cryphonectria parasitica”Boukhili, Mariem; Radócz, László; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarChestnut blight canker is a serious disease caused by the Ascomycota fungus Cryphonectria parasitica. It started from China to North America and it was quickly spread to many other countries all over the world. The European Epidemic was first found in Italy in 1938 and spread throughout Europe, eventually reaching neighboring nations: France, Spain, Turkey, Greece and many other countries. The pathogen has spread to a lot of chestnut orchards, resulting in the loss of more than half of Castanea sativa spp. In Hungary, Castanea sativa is an important tree, cultivated due to its economic impact. The tree is preferred because it has a good nutrition value and usually used as wood resources as well as animal feed. Unfortunately, the introduction of the disease in 1960 leads to a loss of about 50% of orchard trees. In neighbouring countries, particularly in Slovakia, this situation has also been acknowledged. This disease may be spreading so quickly within the region as well as between countries, for that Cryphonectria parasitica was considered a quarantine species in order to limit its introduction into healthy countries and to reduce the growth of the fungus in a contaminated area. Concerning the eradication of the disease, there were no positive results from cutting and burning of the contaminated trees. Chemical treatment was not always possible due to the lack of chemical spectrum availability and due to the size of chestnut trees. The large size of the tree limit the efficiency of chemical application. Hence, biological control using anatogonistic microorganisms could be an efficient treatment against chestnut blight canker. In order to induce resistance to Cryphonectria parasitica, Bacillus subtilis was applied to healthy chestnut trees. Furthermore, Bacillus subtilis is helping plants that are infected by this fungus to recover so fast. In several additional studies, the mycelia growth of C. parasitica has been significantly reduced by Trichoderma spp. Naturally, C. parasitica has two forms: hypovirulent and virulent form. Based on the morphology, hypovirulent strains show white growth mycelia however, reddish to orange mycelia with high pigmentation are shown in the case of virulent isolates. Genetically, the presence of the mycovirus make the difference between the two forms. Hypovirulent isolates are always recognized as positive strand RNA virus hence dsRNA is limited to the cytoplasm of hypovirulent isolates. Based on this, 44% of samples are hypovirulent and 56% are virulent. FG2, FG5, FG6 and FG7 are the hypovirulent strains however FG3, FG4, FG8, FG10, and FG12 present the virulent ones. Biological control by using hypovirulence was used successfully in the control of chestnut blight canker. Several researchers have confirmed that due to the presence of hypovirus, hypoviruelnt strains have the potential to attenuate the virulent effect of C. parasitica going to the total elimination of its virulence and this is through its conversion resulting of the acquisition of dsRNA. Hence hypovirulent isolates have the potential to transfer their genetic material (dsRNA) to the virulent samples in order to convert all virulent isolates into hypovirulent ones. This conversion can be acquired under certain conditions, the most crucial among which is the vegetative compatibility between strains. Vegetative compatibility refers to the total fusion of hyphae between samples which allowed the transmission of dsRNA from hypovirulent to virulent isolate. Barrier zone can be seen in case of vegetative incompatibility and it refers to the death of cells between incompatible strains. Genetically, vegetative compatible strains share the same alleles at every locus. The recombination of vegetative incompatible genes during the sexual reproduction is the main cause of high VC-type diversity. In Europe, huge distribution of VC types were found in different regions. The most frequent VC type in Eastern Europe is EU-12, same VC type were found in Southern Europe such as Italy and Greece. EU-1, EU-2 and EU-5 are dominant in France, Spain and Switzerland (ROBIN – HEINIGER, 2001). EU-11 was the most frequent VC-type in Portugal, followed by EU-12 however EU-66 was the less frequent (BRAGANÇA et al., 2007). In Hungary, according to RADOCZ (2001), the most common VC type is EU-12. In our research EU-12 was recognized in both sites. In Farkasgyepű, 2 VC type were found: EU-1 and EU-12 and in Nagykanizsa 4 VC type were noted: EU-1, EU12, EU3 and EU-20. Low genetic diversity is noted comparing to the findings of RADÓCZ (2001). Low genetic diversity of VC type can be explained by the dominance of asexual reproduction between VC loci, inoculation of new samples through biological control or introduction of new groups through mutation. Both sites have not been treated before, for that reason, asexual reproduction should be the main cause of the low rate of genetic diversity. The low genetic diversity is required for biological control using hypoviruelnce. For that the success of this method in the given area is promoted. To confirm the hypovirulence and the conversion of different strains. Inoculation on apple fruit was done. The results obtained confirm that hypoviruelnt and converted strains (except C3) gave the same result as the control samples: no necrotic growth was induced. However, the virulent strains induced a lesion necrotic growth and a significant growth was noted 10 days after inoculation. According to the formula of relative virulence given by DING et al. (2007), FG3, FG4 and FG10 are the most virulent strains. FG8 and FG12 are medium virulent strains. These results were confirmed by statistical analysis using MINITAB, 2020. The converted C3: FG2 × FG10, morphologically, shows white growth mycelia and based on the microscope observation a hyphae fusion was recognized. Hence, the conversion was noted however, during inoculation the converted C3 has induced a small necrotic growth and this effect was different to the hypovirulent and the other converted strains. These results have been explained by the fact that FG10 has received the dsRNA from the hypovirulent FG2, however, its conversion was slow for that the necrotic growth was detected (ANAGNOSTAKIS – DAY, 1979). Positive results are expected for field inoculation. As a conclusion, we can confirm that biological control in Hungary is possible due the low genetic diversity of VC type. Hypovirulence can exist naturally, and this is the situation in Farkasgyepű and Nagykanisza. Conversion is possible between compatible fungal sample and this is based on the transmission of dsRNA between isolates. Conversion can be rapid (less than 48h) or slow (going for some months/years). In order to confirm that samples showing white mycelia are the hypovirulent ones. dsRNA extraction was done for FG2 and NF11. The results based on the gel electrophoresis confirmed the presence of the genetic material. Based on these findings it was confirmed that the white mycelia is the basic phenotype of hypoviruelnt strain and the dsRNA is strictly related to the hypovirulent ones.Tétel Korlátozottan hozzáférhető Preliminary analysis of long-term population dynamic of six economically important Noctuid species belonging to different life forms.De Oliveira Mota, Claryssa; Nagy, Antal; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe objective of this study was to correlate the differences of population of 6 species of Noctuidae groups and study the effects of climate changes in those populations. Light trap was put on the garden of the agriculture faculty in 1970 and has being collecting data ever since. The abundance of species were not taken in consideration just the swarming of generations.Tétel Korlátozottan hozzáférhető Impact of chronic heat-stress on the digestibility and retention of nutrients in finishing pigsOgonji, Humphrey Oriedo; Szabó, Csaba; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe objective of the study was to asses the impact of heat stress (HS) on the digestibility and retention of nutrients in finishing pigs, and the effect of dietary supplementation of heat stressed pigs with antioxidants,(vitamin E, vitamin C,zinc and selenium). The study was arranged into four treatments whereby, first,second and third groups were put under HS and fourth group was in thermo neutral(TN) room. First and fourth (HC and TC) groups were fed on the basal diet as per NRC(2012) recommendations, while second and third (HT1 and HT2) groups were fed on the supplemented basal diets. From the study, there was no significant difference between the HC and TC groups. However, significant differences were observed between groups fed on basal diet (HC and TC) only and those fed on supplemented diets (HT1 and HT2). This findings shows that in this trial, the ambient temperatures did not significantly impact on the pigs digestibility and retention of nutrients, which could be as a result of the pigs high tolerance to HS. However, the study proved that antioxidant supplementation could improve digestibility and retention of nutrients but vitamins and minerals inclusion and supplementation need to be carefully evaluated.Tétel Korlátozottan hozzáférhető Effect of crop rotation and nutrient supply on the quality of winter wheat varietiesSalunke, Apurva Tukaram; Kutasy, Erika; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarMany publications, research papers, and studies on the impact of nitrogen fertilizer on the quality and quantity of produce, as well as the value of irrigation and plant health, can be found. My study and work will focus on the effects of nitrogen fertilization, split nitrogen fertilization, and legumes as forecrops on the quality of the winter wheat harvested. Our research into this topic aimed to gain a better understanding of the subject. We wanted to see how a nitrogen fertilizer distribution (applications and how they influence yield averages and, more specifically, efficiency parameters) affects the outcome. Wheat production is aided by a variety of agro-technical approaches, including nutrient supplementation, environmental factors, water distribution, and temperature. The unfavorable effect of crop year is significantly reduced by high-quality soil and adequate technology.Tétel Korlátozottan hozzáférhető Optimal age of breeding gilts and its impact on lifetime performanceOsotsi, Joab Malanda; Novotniné-Dankó, Gabriella; Balogh, Péter; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThough the present study was an observational analysis of retrospective data records from commercial piglet producing herds, our results could be biased by growth rate of gilts, weight at first breeding and backfat thickness at first breeding which we did not measure. However the present study adds to scientific work by providing valuable findings regarding the significance of age at first breeding and its relation with lifetime performance helping swine producers and veterinarians to put in practice for productivity in the swine industry. Analyzing collected and stored farm data using appropriate statistical tools has proved to provide valuable solutions that could not have been established on a time restricted controlled experiment. Swine producers and veterinarians can now adequately rely on retrospective data analysis to spruce out solutions on the challenges that are facing the swine industry.Tétel Korlátozottan hozzáférhető Comparative study of physicochemical properties of Busha whey from Kosovo and Hungarian whey milkSamadraxha, Adhuron; Czipa, Nikolett; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe aim of the research was to identify the mineral content, flavonoid and phenolic content of whey as well as pH level and acidity level of whey, this research also aims to compare these results with whey samples from Hungary. These analyses of Busha whey from Kosovo and whey samples from Hungary were performed by using different methods and equipment in order to achieve all of the analysis. For this to be possible was performed with various instruments such as: ICP-OES (Inductively Coupled Plasma Optical Emission Spectroscopy), Spectrophotometer and pH meter. ICP-OES is used to determine each element content in whey samples, while Spectrophotometer is used for the determination of total phenolic content (TPC) and flavonoid content. pH and acidity level were determined by pH meter and burette respectively.Tétel Korlátozottan hozzáférhető Assessing the effect of mineralization of different types of poultry manure on the pH, NO3- and NH4+ levels of sandy soil at different soil moisture levels over timeKaranja, Mary Waithera; Nagy, Péter Tamás; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis study focused on assessing nitrogen mineralization in sandy soil amended with different types of poultry manure. The pH, NO3- and NH4+ levels in the soil were assessed at different soil moisture conditions over a short laboratory aerobic- incubation period. The objectives of the study were: (1) To assess the pH levels of the manure-amended soil at different soil moisture conditions during the aerobic incubation period, (2) To assess the NO3- levels of the manure-amended soil at different soil moisture conditions during the aerobic incubation period, (3) To assess the NH4+ levels of the manure-amended soil at different soil moisture conditions during the aerobic incubation period.Tétel Korlátozottan hozzáférhető Milk quantity and milk quality analyses based on HACCP at Béke Mezőgazdasági Kft.Jargalsaikhan, Amarjargal; Nikolett, Szőllősi; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarIn the present, we discussed the milk quality and quantity based on HACCP at A Béke Mezőgazdasági Kft. The objective of the my research is to evaluate milk yield and quality parameter at Béke Mezőgazdasági Kft. Milk samples were collected and analyzed to determine milk quality components.The sample taken is analyzed in the laboratory of Állattenyesztési Teljesítményvizsgálo (Át)Kft. Milk fat, milk protein, lactose, somatic cell count and urea content are measured.Tétel Korlátozottan hozzáférhető Influence of different foliar fertilization treatments on the response of winter oat towards the abiotic stress through UAV-based surveysAcosta Santamaria, Solange Paola; Budayné Bódi, Erika; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarIn recent years, the popularity of using unmanned aerial vehicles (UAVs) for environmental and agricultural purposes has increased because of their practicality and non-invasiveness. In the present study, five Hungarian winter oat (Avena sativa L.) varieties were involved into a field experiment to evaluate their response and tolerance to drought stress influenced with three different foliar fertilization treatments based on silicon, sulfur and the combination of both elements (Si, S, SiS) in the growing season of 2021-2022. Wide range of information from aerial surveys which includes vegetation indices from multispectral sensor, surface temperature and crop height from LiDAR payloads were evaluated in their interaction with production features such as yield, thousand kernel weight and grains moisture, with the objective to monitor the effects of the drought stress and the foliar fertilization treatments in the status of the plants at its different phenological stages. The results showed that the silicon-sulfur combined fertilization caused the most advantageous changes in the crop in term of NDVI, NDRE, plant height, temperature and yield. The statistical correlations show a positive and strong link between the average yield and the UAV parameters of NDVI and NDRE and in negative way with the crop temperature, however, in the study of the treatments and varieties separately, statistical divergences were also found with the same trend but in unequal scale, showing the contribution of the genotype in the resistance and effects of the abiotic stress. These results effectively support the use of UAVs to assess field experiments and obtain information about the tolerance of different varieties of winter oat towards the water stress and consequently propose alternatives and solutions that counteract the effects of climate change and weather variability in the crops that can put their yield at risk and furthermore the food security.Tétel Korlátozottan hozzáférhető Quality assurance framework for cocoa powder beverage productionJayallan, Yuwaraaj; Pusztahelyi, Tünde; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThis thesis proposes a comprehensive Quality Assurance (QA) framework for cocoa powder beverage production, addressing the need for consistent quality and safe production in this growing industry. The framework integrates Failure Modes and Effects Analysis (FMEA) and comprehensive risk assessment guides to improve the efficiency throughout the production process. The proposed framework offers a valuable model for cocoa powder beverage manufacturers seeking to optimize quality, protect consumer health, and gain a competitive advantage in the marketplace.Tétel Korlátozottan hozzáférhető Connection between vegetation type and the distribution of European ground squirrels Spermophilus Citellus in a protected site near DebrecenBin Mohd Wadzir, Muhamad Firdaus; Németh, Attila; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe European ground squirrel is an endangered species of rodent in Europe. The area of the study in Tócó valley manages to highlighted various key importance towards the survival of the species. The result of the study recorded 234 observations of the European ground squirrel hole. Of the various vegetation type that can be found in the study, the European ground squirrel can be found in at least three vegetation type. The vegetation type are Closed steppes on loess (H5a), Mesotrophic wet meadows (D34), and Uncharacteristic mesic grasslands (OB). H5a manage to encompass 85.8% of all the holes observed during the study. This study proves that the European ground squirrels prefers nutrient rich healthy vegetation type and are a capable adaptable species. This study aim to provide beneficial data on the European ground squirrel situation for Hungary at least for the Tócó valley area.Tétel Korlátozottan hozzáférhető Evaluation of the capability of visible and near infrared spectroscopy for humus percentage content determination in Hungarian soilsQuintin Escobar, Diana Liliana; Nagy, Attila; DE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási KarThe research aims were to evaluate the performance of humus prediction models by the implementation of VIS-NIR spectroscopy, as an alternative soil evaluation method.30 Soil samples were collected from a deep of 0-20 cm, humus content was determined by the Hungarian standard MSZ-08-0210: 1977 method. By evaluating the laboratory soil reflectance in the VIS-NIR regions and by assessing sensitive bands, previously determined in other studies. The humus VIS-NIR characterization was done, with the application of principal component analysis, 4 humus prediction models were defined. The validation of the efficiency for humus prediction was estimated by the root mean square error, determining the difference between the humus observed values, obtained with the Hungarian method and the humus predicted values of the models.