László Huzsvai

• PhD
• Head of Department at University of Debrecen

Az Európai Bizottság 2014 óta követi nyomon a tagállamok digitális fejlődését a digitális gazdasági és társadalmi (DESI) index segítségével. A DESI éves adatbázisainak felhasználásával arra kerestük a választ, hogy kimutatható-e konvergencia a tagállamok között. Az indexek eltéréseit vizsgálva az ún. Máté-hatás meglétére gyanakodtunk. Feltételeztük...

Similar to other regions, in East Central Europe, agriculture is the most vulnerable sector regarding the consequences of climate change through increasing variability in weather conditions, even on the short-term and local scales. Agricultural engineers make decisions; higher education has a crucial role in taking proper actions. Our survey aimed...

A platform alapú, kereslet-elven működő vállalkozások, gyűjtőnevükön közösségi gazdaság típusú vállalkozások 2008-ban jelentek meg az Amerikai Egyesült Álla-mokban. Megjelenésüket a digitális fejlődés tette lehetővé, hatásuk pedig tetten érhető a gazdasági és társadalmi életben egyaránt, az együttműködési modellek globalizált jellegében. Az Európai...

The level of yield variation of primary crops has a considerable effect on the vulnerability of agriculture. The main factor that makes the agriculture of Hungary so vulnerable is climate change, and technological development cannot compensate for its unfavourable effects. We examined the yield failures of the two major field crops grown in Hungary...

Precision agricultural (PrA) technology relies on the utilization of special equipment to access real time observations on plant health status, chlorophyll, nitrogen content, and soil moisture content. In this research new PrA technology (i.e., SPAD (Soil Plant Analysis Development), and UAV-based NDVI (Unmanned Aerial Vehicle-based Normalized Diff...

A well-functioning public transport system is one of the foundations of the Smart city concept and sustainable cities. The COVID period offers an excellent opportunity to examine the impact of different factors, because throughout this period society was faced with both health and governmental impacts that had different effects. Public transport us...

Maize yield forecasting is important for the organisation of harvesting and storage, for the estimation of the commodity base and for the provision of the country’s feed and food demand (export–import). To this end, a field experiment was conducted in dry (2021) and extreme dry (2022) years to track the development of the crop to determine the evol...

In the European Union Member States, the share of public transport use from the turn of the millennium to the beginning of the pandemic period was 17–18%, while in Hungary, it was 27%. The number of public transport users has fallen due to the Covid-19 virus to 13% in the EU and 21% in Hungary. The decrease can be attributed to changes in travel ha...

The study introduces the current situation of electric vehicle technologies, the possibilities and possible directions of their market, as well as the economic and environmental aspects in the eastern region of the EU, with special regard to Hungary. Our calculations show that despite the higher costs of ownership, in the case of 7 years of use (am...

It is difficult to estimate the contribution of individual sources to the total CO2 efflux from soil with vegetation. Long-term experiments with bare soil will provide useful conclusions. In this study, we aimed to mathematize the effect of soil temperature and soil moisture content on bare soil CO2 efflux in a four-season semiarid region to assess...

Predominantly, field experiments aim to determine the optimal plant density for a unit area. High spatial variation results in lower attained yield than the genetic potential. To find the highest value of the product of mean individual production and crop density, their mathematical relationship is needed to be known. In this study, the relationshi...

Reference crop evapotranspiration (ETo) is an important component of the hydrological cycle that is used for water resource planning, irrigation, and agricultural management, as well as in other hydrological processes. The aim of this study was to estimate the ETo based on limited meteorological data using an artificial neural network (ANN) method....

The European Commission (EC) has monitored Member States' digital progress through the Digital Economy and Society Index (DESI) since 2014. The DESI index currently ranks the EU Member States and monitors their progress based on four core and 33 individual indicators. We sought to determine whether convergence between the Member States could be det...

Wheat is grown in the largest area in the world as well as in Hungary. Globally, the yield is predicted to decrease due to climate change; however, technological development can potentially compensate for it. In this study, the contribution of climatic and technological trends to the change in winter wheat yield in four sub-regions of Hungary with...

In recent decades, the agricultural sector has witnessed rapid technological interventions from field to the production stage. Thus, the importance of these technological interventions must be strictly evaluated. The traditional statistical method often deems low statistical differences as a significant one, which cannot be considered effective fro...

A fogyasztói preferenciák vizsgálatához alkalmazott eljárás megválasztása még manapság is rendkívül nehéz döntést képvisel a kutatásokban. A feltárt preferencia (SP) jellegű adatokon alapuló módszerek használatakor a kutatók elsődleges célja az, hogy minél eredményesebben tudják csökkentetni a hipotetikus kontextus okozta torzító hatást, mindemelle...

The global precision farming area is constantly increasing, and precision sweet maize production developed the most. Sweet maize yield is above average in precision farming. Additionally, its role in healthy nutrition is becoming increasingly important due to new hybrids with high carotenoid content. Precision farming techniques are needed to produ...

A vetésidő, az időjárás és a kukoricaszem fehérje-és olajtartalma közötti kapcsolat eltérő genotípusú kukorica hibrideknél 1 SZÉLES ADRIENN-1 HORVÁTH ÉVA-2 HUZSVAI LÁSZLÓ Debreceni Egyetem 1 Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar, Földhasznosítási, Műszaki és Területfejlesztési Intézet, Debrecen 2 Gazdaságtudományi Kar, Sta...

This study aimed to examine whether litters’ let-together system before weaning (‘kindergarten-system’) has any stress effect and effect on post-weaning behavior, respectively. One week before weaning piglets were socialized by removing four adjacent farrowing crate walls. After weaning, piglets from the same experimental groups were housed in the...

Processing large amounts of data provided by automated analytical equipment requires carefulness. Most mathematical and statistical methods have strict application conditions. Most of these methods are based on eigenvalue calculations and require variables to be correlated in groups. If this condition is not met, the most popular multivariate metho...

A field trial was conducted in Hungary, in a moderately warm, dry production area to determine the effect of single or split application of N-fertilizer on the stomatal conductance and grain yield of maize. The measurements were performed at on calcareous chernozem soil, in a strip field trial, under different weather conditions (2019 and 2020). In...

The goals of our study were to evaluate the historical aspects of maize (Zea mays L.) production in Hungary, and to provide a prognosis for the yield for 2050 based on the trends of temperature, precipitation, and climatic water balance changes. Different climate zones for the period of 1970–2019 were investigated by means of correlation analyses,...

Quality and production of arable crop plants is severely sensitive to environmental factors (IPCC, 2012). According to the FAO statistics, global cereal production was 2,720 million tons in 2019, which is 2.5% less compared to 2018. Although cereal production, especially wheat and maize, could increase for countries such as the United States of Ame...

Simple Summary The yellow mealworm, super worm, and house cricket are among the most widely produced insects, with high feed conversion efficiency. However, their nutritional composition and development rate generally vary with environmental conditions. From an economic point of view, rearing conditions such as diet, temperature, and time, and inse...

Currently, predictability of weather is uncertain, resulting from increasingly variable weather conditions. Thus, crop yield forecasting based on seasonal weather information remains a challenge for the agricultural sector. In this study, non-linear regression analysis was carried out to model long-term meteorological data. To assess the predictabi...

The treatment and utilization of plant and animal waste and by-products from agriculture is very diverse. Traditional environmental management practices for waste management have been retained through soil conservation and the applied of recycle degradable organic substances in soil. The management of by-products from agriculture (animal husbandry)...

Well-structured stimuli presentation is essential in eye-tracking research to test predefined hypotheses reliably and to conduct relevant gazing behavior studies. Several bottom-up factors associated with stimuli presentation (such as stimuli orientation, size etc.) can influence gazing behavior. However, only a small number of scientific papers ad...

This research focused on accurately modelling emergence (VEEmergence) and silking (R1) dates using 5 cm deep soil temperature (ST) and how sowing date (SD) affects VEEmergence and R1 date of different maturity hybrids and which is the optimum sowing date in the changed climate. Three sowing dates were used between 4th April and 10th May. The same m...

The aim of this study is to reveal the effects of housing systems, farm sizes and production levels on the economic indicators of Hungarian table egg production. This research is based on the farm-level cost and income data and the related weights of egg production farms between 2003-2015 from the Hungarian FADN database. These data were processed...

Abstract: Present study is focused on the quality parameters of maize hybrids used as animal feed and on the evaluation of the effect of sowing dates and weather factors. The an alyses were carried out in Hungary, near Debrecen ( 47 o 33’N, 21 o 26’E , 111 m), on calcareous chernozem soil between 2011 - 2013. The experiment took place with the...

The traditional Hungarian method for determining soil phosphorus (P) status is ammonium-lactate acetic acid (AL) extraction. AL is an acidic solution (buffered at pH 3.75), which is also able to dissolve P reserves, so there is a need for extraction methods that also characterize the mobile P pool. 0.01 M CaCl 2 -P is considered to directly describ...

Piglets in commercial intensive pig husbandry are often abruptly weaned between 3 and 4 weeks for economic reasons. The process of weaning is a multifactorial stressor, in which nutritional, social, physical and psychologic stressors are combined. Piglets are often exposed to unfamiliar piglets around weaning which results in a period of vigorous f...

The respondents rated the most important questions of the questionnaire on a Likert scale. The responses greatly deviated from the normal distribution; therefore, the Kruskal–Wallis H and Mann–Whitney U were used to test the differences of knowledge about and interest in biofuels and of differences between the most important characteristics of the...

Since 1940 molybdenum has been known as an essential trace element in plant nutrition and physiology. It has a central role in nitrogen metabolism, and its deficiency leads to nitrate accumulation in plants. In this study, we cultivated maize seedlings (Zea mays L. cv. Norma SC) in nutrient solution and soil (rhizoboxes) to investigate the effect o...

Az utóbbi évtizedekben a kocák tejtermelése az átlagos alomszám növekedé-sével párhuzamosan jelentősen javult, az aktuális tejhozamot azonban sok kör-nyezeti tényező befolyásolja. A kiegészítő folyékony tejpótló tápszer adagolása a fiaztatóban megfelelő megoldás arra, hogy csökkentsük a különböző tejterme-lésű kocák almai közötti testtömegkülönbség...

The aim of this study was to compare the characteristics of the productive lifetime (PLT) of sows kept on two farms, from the aspect of reasons for culling. The study was based on data from animals from two breeding farms in hungary, using the data of 3493 crossbred dutch large white and dutch landrace sows (DLW × DL) between their first farrowing...

Sow milk production is the major factor limiting pig growth to weaning. Genetic and enviornmental changes during the last few decades have resulted in higher milk production of lactating sows, however, many environmental factors affect the actual performances. The supplemental milk replacer can be an appropriate solution to ward off uncertainties a...

The aim of the present study was to investigate the effect of liquid milk supplement on litter performance (weight development of the piglets, weaning weight and mortality) and on sow back-fat thickness change during the suckling period. Data were collected from 150 litters, with the weight of a total of 1709 piglets measured at birth, at 14 days...

Sow milk production is the major factor limiting pig growth to weaning. Although the milk production of the sows incremental many environmental factors affect the actual performances. The supplemental milk replacer can be an appropriate solution to ward off disparities and try to equalize the available milk quantity to the piglets according to thei...

Within the scope of this study we test the Long Memory property on monthly average pig market prices including piglet, young pig, sow and slaughter pig. We also calculate the Hurst exponent using Detrended Fluctuation Analysis (DFA) method. DFA is a method for determining the statistical self-affinity of a time serie. It is a useful technique for i...

Background The traditional internal and external preference mapping methods are based on principal component analysis (PCA). However, parallel factor analysis (PARAFAC) and Tucker-3 methods could be a better choice. To evaluate the methods, preference maps of sweet corn varieties will be introduced.ResultsA preference map of eight sweet corn variet...

Because of its several relevancies with seed germination it is inevitable to acquire relevant information on the heat conducting capacity of a soil. Soil heat conductivity today is either measured or modeled. In our publication we rely on the procedure developed by Sang-Ok Chung and Robert Horton (1987). We translated the original heat flow model i...

This study presents a PHP-based model capable of calculating maize leaf area index. The model calculates LAI from emergence to 75% silking. The basis of calculation is represented by the daily average temperature values. The usability of the model was tested using three years' temperature and LAI data series from the values obtained by the weather...

Based on Soil Plant Analysis Development (SPAD) values, nitrogen (N) deficiency, nutrient need, and the effect of fertilizer treatments on crop conditions can be quickly estimated, but the method of SPAD measurement significantly affects the accuracy of estimation. In field experiments near Debrecen, Hungary, we measured the reliability and accurac...

Metabolic hormones [insulin, leptin, insulin-like growth factor-I (IGF-I), thyroxine (T4) and triiodothyronine (T3)], progesterone (P4) and beta-hydroxybutyrate (BHB) serum concentrations were evaluated and their effect on the superovulation results of donor cows was investigated in a semi-arid environment. Body weight, body condition score (BCS) a...

Crop Production - Növénytermelés Nowadays, one of the main objectives is to create the conditions of sustainable farming. Precision agriculture enables these conditions to simultaneously prevail. They include production site-specific growing, technologies which change within a plot, integrated crop protection, high technology, remote sensing, geog...

Soil moisture flux to root surface is considered the main determining factor of the transpiration intensity of plants. This assumption is valid not only in optimal plant physiological conditions without any physical barrier for the evaporation from the leaves, but in climatic drought as well, when high usable soil water amount cannot supply the eva...

The impact of irrigation on crop yield is usually described by the yield growth extent. If precipitation supply is average, maize irrigation is ineffective, but it can result in significant yield surplus in drought. Also, there are - rather rare - conditions, in which irrigation causes yield drop. This happened at the latitudinal degree 47 degrees...

The objectives of this study were to evaluate the effects of different tillage methods, under rainfed conditions in eastern Hungary, on soil water and nitrate-N content and to simulate the dynamics of the soil water and nitrogen regime over the 2003-2006 crop season. There were not considerable differences between measured and predicted soil water...

The factual data of the organization carrying out plant growing activities on the Debrecen loess ridge are presented in this paper. The company uses 650 hectares and its main profile is plant growing. 100 hectares were used for maize production purposes both in 2006 and 2007. The average gold crown value (measurement unit of the quality of arable l...

There is a mutual dependence between nature conservation activity and agriculture in Hungary, as the management of the protected areas cannot be achieved without ecological farming methods. Moreover, viable economic activity can be only imagined through the harmonization of agricultural and nature conservation interests. From a nature conservation...

The cultivation technologies for the dominant crops in Hungary need to be improved both in the interests of environmental protection and to reduce cultivation costs. A long-term research project was initiated in order to determine the feasibility of conservation tillage systems. The aim of the experiments was to evaluate conservation farming system...

The objectives of this study were to examine the correlation between factors of great significance for crop production, especially between irrigation and fertilization, and to evaluate the effects of irrigation and fertilization on maize yields over four growing seasons (2001-2004) in a long-term field experiment set up at the Látókép Experimental...

The yield-increasing effect of fertilization is most often approached with a quadratic equation (parabola). The advantage of this equation is that it describes the relationship fairly precisely with one optimum point and one peak, using only three parameters. Its disadvantage is that the line of the curve before and after the optimum point is symme...

The cultivation technology for those plant, that play a key role in arable land production need to be renewed in order to reduce production costs and to protect arable land. The modernisation of technologies can only be achieved by applying appropriate tillage systems. Our measurements were carried out on chernozem soil with lime deposits at the Lá...

The effects of fertilization were examined at the Látó kép experimental station of the Center for Agricultural Sciences, University of Debrecen on chernozem soil with lime deposits. The yield results of the maize hybrid Alpha was evaluated between 1997 and 2002 and over the average of six years in irrigated and non-irrigated treatments with the hel...

In a long-term field experiment set up at the Látókép experimental station of the Center of Agricultural Sciences of Debrecen University, the data of the last five years (1995-1999) were analyzed to determine the crop production factors with the greatest influence on maize production and the relationship and interactions between irrigation and fert...

The effect of fertilization on the yield of maize was examined on chernoem soil with lime deposits at the experimental station at Látókép of the Center for Agricultural Sciences, University of Debrecen. The yields of maize were evaluated using quadratic regression function, in three years – between 2000 and 2002 – in non-irrigated and irrigated tre...

During our work, we developed a new, simple method to show the effects of fertilization on yield, which can both be applied over the long term as well as in series of independent experiments.During the testing of this method, at the experimental farm of the Debrecen University Center for Agricultural Sciences at Látókép on a chernozem soil with lim...

In a long-term field experiment set up in the Látókép experimental station of the Centre of Agricultural Sciences of Debrecen University, the data of the last five years (1995-1999) were analysed to determine the crop production factors with the greatest influence on maize production and the correlations and interactions between irrigation and mine...

The objective of this study was to examine the effects of fertilization, plant density and genotypes on biomass production of maize under irrigated conditions on the basis of the results of the multifactorial long-term experiment. The interval of plant number tested was 30-90 103 plant ha-1, the maize hybrids examined were Occitan SC and Dekalb 471...

The effect of weather and precipitation on maize yield has been examined by analyzing 14 years of yield of the hybrid Pioneer 3732 SC. Years have been characterized by climatic parameters. Precipitation from the harvesting of pre-crop till the sowing of maize and that during the growing season, and the average monthly temperatures during the growin...

A vetésváltásban termesztett kukorica egyértelműen, szignifikánsan több termést ad. Öntözött körülmények között a nem trágyázott parcellákon a vetésváltás termésnövelő hatása 55%-os. Trágyázás nélkül az elmúlt négy év (2003-2006) átlagában az öntözés csökkentette a kukorica termését! Amennyiben az öntözést műtrágyázással kombináljuk a vetésváltás t...