Péter Tamás Nagy - Academia.edu (original) (raw)

Papers by Péter Tamás Nagy

Agriculture and Food, Jul 19, 2018

International journal of horticultural science, Apr 25, 2012

Acta agraria Debreceniensis, Sep 14, 2005

termesztési körülmények között Nagykutason. A vizsgálat során a gyümölcsök átmér�jét, magasságát,... more termesztési körülmények között Nagykutason. A vizsgálat során a gyümölcsök átmér�jét, magasságát, szélességét, kocsányhosszát és szártömegét, gyümölcs-és k�magtömegét, valamint az összes oldható szárazanyagtartalmát mértük. A fajták között számottev� különbségeket állapítottunk meg mindhárom gyümölcsméretet jellemz� tulajdonság és a gyümölcstömeg tekintetében. A fajták között megállapított különbség a fajtatulajdonságoknak köszönhet�, mivel az egyéb körülmények megegyeztek. 11 fajta esetében több (2-4) alkalommal is gy�jtöttünk gyümölcsmintát. Ezek vizsgálata során megfelel� képet kaptunk arról, hogy az optimálisnál korábbi, illetve kés�bbi szedés hogyan befolyásolja a gyümölcs min�ségét.

University of Debrecen Electronic Archive (University of Debrecen), Dec 1, 2008

University of Debrecen Electronic Archive (University of Debrecen), Dec 1, 2008

University of Debrecen Electronic Archive (University of Debrecen), Dec 1, 2008

Frontiers in Plant Science

Free-floating and rootless submerged macrophytes are typical, mutually exclusive vegetation types... more Free-floating and rootless submerged macrophytes are typical, mutually exclusive vegetation types that can alternatively dominate in stagnant and slow flowing inland water bodies. A dominance of free-floating plants has been associated with a lower number of aquatic ecosystem services and can be explained by shading of rootless submerged macrophytes. Vice versa, high pH and competition for several nutrients have been proposed to explain the dominance of rootless submerged macrophytes. Here, we performed co-culture experiments to disentangle the influence of limitation by different nutrients, by pH effects and by allelopathy in sustaining the dominance of rootless submerged macrophytes. Specifically, we compared the effects of nitrogen (N), phosphorus (P), iron (Fe) and manganese (Mn) deficiencies and an increased pH from 7 to 10 in reducing the growth of free-floating Lemna gibba by the rootless Ceratophyllum demersum. These macrophyte species are among the most common in highly eut...

International journal of horticultural science, May 10, 2010

Analele Universităţii din Oradea, Fascicula: Protecţia Mediului, 2008

The effect of some plant growth bioregulators on the macronutrients content in leaves of six year... more The effect of some plant growth bioregulators on the macronutrients content in leaves of six years old 'Gönci magyar kajszi' and 'Mandulakajszi' apricot trees (Prunus armeniaca L) on the different phenological stages were studied. The experiment was conducted in Central-Hungary on mature cv. 'Gönci magyar kajszi' and 'Mandulakajszi' grafted on myrobalán rootstock in 2007. Trees spaced 6 x 4 m, and growing in a chernozem soil at Sóskút in Central-Hungary. Trees were foliar-fertilized with Bioplasma and Naturkomplex as fertilizers and their combination. Foliar sprays were performed: (1) at the stage of white bud, (2) at full bloom and (3) at the stage of intensive shoot growing. In each of spring spray treatments, fertilizers were applied at a rate of 5L ha −1. Trees untreated with fertilizers served as a control. Treatments had no effect on leaf nitrogen. All applied treatments increased leaf phosphorous compared to the control. Consequent effect of treatments was not observed during examined period neither at 'Gönci magyar kajszi' nor 'Mandulakajszi' regarding leaf potassium. However, treatments increased leaf Ca significantly at all sampling time at 'Gönci magyar kajszi'. Treatments had no influenced N, P, K and Ca uptake of different cultivars. Moreover, treatments affected Mg uptake differently at examined cultivars.

Acta Agraria Debreceniensis

AIt is a huge challenge for farmers worldwide to successfully increase the organic matter content... more AIt is a huge challenge for farmers worldwide to successfully increase the organic matter content of their soils and improve their water balance at the same time. Therefore, the main aim of the study is to develop and test organic-based nutrient composite materials that can be successfully used by farmers to increase soil organic matter content, improve water management parameters and implement water-efficient technologies. The study was performed in the orchard of the Institute of Horticultural Science of the University of Debrecen in Hungary (Debrecen-Pallag). The experiment was set up in a ten-year-old apple (Malus domestica ‘Pinova’) orchard. In the trial, fermented poultry manure and superabsorbent polymers (SAP) were used at different doses to study their effects on soil properties and fruit quality. Applied composite materials increased the nitrate and organic nitrogen content of the soil. Treatments did not affect the sugar content of the fruits but significantly and positiv...

International Journal of Horticultural Science, 2010

Produce of harmonic nutrient balance and status of trees is basic task of growers for qualified f... more Produce of harmonic nutrient balance and status of trees is basic task of growers for qualified fruit growing. The role of croploaded is essential to grow the productivity of trees without nutrient disorder or other nutritional problems. To reduce the frequency of biennialbearing there are some ways (site and species selection, crop regulation, irrigation, nutrition etc.) from them one is the best easy way theproper site and species oriented nutrition. Sometimes the responsible for irregular cropping is the insufficient fertilization. Observed irregularcropping at two apple cultivars (Malus domestica Borkh., cv. ‘Summerred’ and cv. ‘Mutsu’) in an integrated apple orchard at Hajdúnánás-Tedej, in 2007 resulted a chance to determine nutritional status of “bearing” and “non bearing” trees and investigate the effects of irregularcropping on nutrient uptake and possibilities of correction. Our results pointed out that irregularity is connection on nutrition status of trees.Irregular cropp...

Acta agraria Debreceniensis, May 26, 2022

In our study, the effect of fermented and specially added poultry manure products (superabsorbent... more In our study, the effect of fermented and specially added poultry manure products (superabsorbent polymer (SAP), bentonite an d Aegis as a mycorrhizal inoculum) were investigated in a short soil incubation experimentat 60% water capacity level-on sandy soil. Soil samples were collected from two layers of the incubation pots after the second and fourth week to check the status of the tested products and the processes in the soil. The pH and the electric conductivity (EC) of the samples were measured using an electrochemical method, while the ammonium and nitrate content of the samples was determined with a photometric method. Soil pH and EC values slightly were decreased du ring the experiment. Our results pointed out that the increasing dose of SAP caused lower soil pH. The nitrate content of the soil did not change significantly during the experiment. It was found that the increasing SAP content in the products, due to its cross-linked structural property, protected the nitrate ions from leaching. Our results suggest that applied SAP does not bind the nutrient ions so tightly in its structure that it competes with the plant for uptake.

Acta agraria Debreceniensis, May 26, 2022

According to the Green Deal efforts, the importance and relevance of organic fertilization will i... more According to the Green Deal efforts, the importance and relevance of organic fertilization will increase in the near future. Therefore, the investigation of the effects of different organic fertilizers on soil productivity and nutrient supply is a priority area of agricultural research. Organic fertilizer experiment was conducted in an eight-year-old apple (Malus domestica Borkh.) orchard at Debrecen-Pallag. In the trial Pinova cultivar was used. In this study, two different fermented chicken manure products were added to the soil (in 20 cm depth) to test their effects on soil nutrient status, plant uptake and fruit quality. It was found that the applied treatments slightly increased the pH and nutrient levels in almost all cases, but significant effect was not observed in all treatments compared to the control. Leaf nutrient contents (N, P, K, Ca and Mg) were measured in the experiment. Leaf nutrient status was not affected by the fermented chicken manure treatments. Ho wever, used treatments had strong effects on the fruit characteristics and inner parameters, such as fruit diameter and Brix value. Moreover, it was established that the applied organic fertilizers increased the yield significantly.

Frontiers in Plant Science, 2020

Two submerged Elodea species have small differences in their ecophysiological responses when expo... more Two submerged Elodea species have small differences in their ecophysiological responses when exposed to individual environmental factors. However, field observations showed that under eutrophic conditions with low light availability, Elodea canadensis could be displaced by Elodea nuttallii. Here we investigated the combined effect of environmental factors on the ecophysiological response of the two species in order to explain the differences in their invasion successes. We cultivated the plants in aquaria containing five different nitrogen (N) concentrations and incubated at five different light intensities. For both species increasing nitrogen concentrations resulted in increased relative growth rate, chlorophyll concentration, and actual photochemical efficiency of photosystem II (F PSII), however, they produced less roots. Lowering light intensity resulted in a lower relative growth rate, root production, and nutrient removal. In contrast, chlorophyll concentration in the leaves, and F PSII increased. The main difference between the two Elodea species was that the light compensation point (I c) and weight loss in the dark were significantly higher and photochemical efficiency and chlorophyll concentration were significantly lower for E. canadensis than for E. nuttallii, indicating that the latter can survive under much more shady and hypertrophic conditions. The change in nitrogen concentration of the media and in tissue concentration of the plants indicated that E. nuttallii has a higher nitrogen removal capacity. The ecophysiological differences between the two species can be an explanation for invasion success of E. nuttallii over E. canadensis and thus may explain why the latter is replaced by the first.

Plants

In order to investigate the abiotic stress (drought) tolerance of oat (Avena sativa L.) with sili... more In order to investigate the abiotic stress (drought) tolerance of oat (Avena sativa L.) with silicon and sulphur foliar fertilisation treatments, and monitor the effect of the treatments on the physiology, production, stress tolerance, plant, and grain quality of winter oat varieties, a field experiment was conducted in the growing season of 2020–2021. As a continuation of our article, published in another Special Issue of Plants, in this publication we evaluate the effect of silicon and sulphur treatments on the quality of winter oats. The whole grain sulphur content was significantly different between varieties. The foliar fertiliser treatments caused greater differences in both the carbon and nitrogen, and sulphur contents in the green plant samples, compared to the differences measured in the grain. Foliar treatments had a significant effect on the sulphur content of both plant samples and grains. Significant differences in the Al, Ba, Ca, Cu, Fe, K, Mn, Mo, Na, Ni, P, Pb, Sr, a...

Notulae Scientia Biologicae, 2012

Edible nuts have an increasing role in human diet. Pistachio is a popular but less known kind of ... more Edible nuts have an increasing role in human diet. Pistachio is a popular but less known kind of edible nut nevertheless it is rich in health benefiting nutrients, minerals, antioxidants and vitamins. Therefore, this study attempts to determine the antioxidants capacity, total phenolics and amount of some major elements (nitrogen, potassium, calcium and phosphorus), present in the most important Iranian pistachio nut, to enhance the health benefits, and use in breeding programs. For this reason eleven pistachio cultivars (‘Akbary’, ‘Ahmad Aghaii’, ‘Daneshmandi’, ‘Kalle Ghoochi 1’, ‘Kalle Ghoochi 2’, ‘Garmeh’, ‘Ohadi 1’, ‘Ohadi 2’, ‘Sefid’, ‘Momtaz’, and chance seedling tree ("None-grafted") as control) which are grown in commercial orchards of Fayzabad (Khorasan-e-Razavi) were analyzed for determination of some major elements, antioxidants capacity and total phenolics contents. The results showed that the amounts of the nutrients in 100 g kernel were within the following r...

International Journal of Horticultural Science, 2011

Similarly to 2007, 2011 was also critical year for fruit growers in Eastern-Hungary. Serious fros... more Similarly to 2007, 2011 was also critical year for fruit growers in Eastern-Hungary. Serious frost damage was observed at lateblooming period (6 May (T=-1.6°C)) in this region, which caused approximately 60-65% of fruit loss.The aim of this study is to investigate the effects of a spring frost event on nutrient uptake and status of the trees of a sour cherry plantationat Újfehértó.The symptoms of frost were observed visually. This visual observation was confirmed by SPAD readings. The frost affected the macroandmicronutrient contents of leaves.It was found that the frost affected the nutrient uptake negatively, but the effect of it was not significantly sometimes. It can be stated thatthe nutrient demand of trees can be supplied only under even worse conditions.

International Journal of Horticultural Science, 2012

Foliar nutrition experiment was made to investigate the effect of algae products on fruit quality... more Foliar nutrition experiment was made to investigate the effect of algae products on fruit quality of apples (Malus domesticaBorkh.).The study was conducted in 2011 at Siófok inWest-Hungary on cv. ‘Jonagored’ and ‘Idared’grafted on M9 rootstock.In our trial leaf diagnostic and fruit quality measurements were made to study the effectiveness of applied products. Relative leaf chlorophyllcontent was determined by a portable chlorophyll meter. Fruit weight and shape index were measured. Fruit inner qualifying parameters liketitratable acid content and Brix value were also determined.It can be stated that the used products had traceable effect on investigated fruit parameters. Although, leaf N content was not effected bytreatments significantly, relative leaf chlorophyll content significantly increased by both treatments.Used products significantly increased the fruit weight and shape index. Applied treatments significantly decreased the pH of pulp. Treatmentsincreased the acid contents (...

International Journal of Horticultural Science, 2010

The heavy metals pollution is one of the problems that arise due to the increased uses of fertili... more The heavy metals pollution is one of the problems that arise due to the increased uses of fertilizers and other chemicals to meet the higher demands of food production for human consumption. In order to assess possible health risk of apricot (Prunus armeniaca L.) consumption, levels of Arsenic, Cadmium, Mercury and Lead were determined in fresh and dried samples of "Jumbo cot", "Tom cot", "Gold strike", "Gold bar", "Bergeron", "Bergarouge", "Sweet cot", "Yellow cot" and "Zebra" apricot cultivars. Wet digestion of samples with concentrate HNO3 – H2O2 digester mixture and inductively coupled plasma–atomic emission spectroscopy was used. Highest content of As, Cd, Hg and Pb among all cultivars, were 0.5, 0.04, 1.5 and 0.5mg/kg of dried apricot samples. Fresh fruit samples also contain 0.2, 0.016, 0.6 and 0.2 mg/kg of Arsenic, Cadmium, Mercury and Lead respectively. Daily intake of metals, hazard q...

Forest Ecology and Management, 2005

Soil nitrogen transformations are intricately linked to carbon transformations. We utilized two e... more Soil nitrogen transformations are intricately linked to carbon transformations. We utilized two existing organic matter manipulation sites in western Oregon, USA and Hungary to investigate these linkages. Our questions were: (1) what effect does the quantity and quality of organic matter have on net and gross N processing in mineral soil? and (2) do these effects vary across sites with very different climate, soils, vegetation, and N deposition status? The organic matter manipulations had small if any effects on gross and net N cycling rates. Gross N cycling rates under low N deposition increased with increasing soil C and N, but C:N ratio had no correlation with gross N cycling rates. Soil ammonium concentrations under high N deposition, however, were higher in the organic matter manipulation plots without roots and lower in plots with double litter, indicating a tree root effect and a litter immobilization effect, respectively, but did not differ significantly under low N deposition. Net ammonium production was lowest in the litter removal and root removal plots and highest in the litter addition plots at both sites. Gross and net N cycling rates and mineral nitrogen pool sizes were generally higher under higher N deposition and lower C:N ratio soil, which was consistent with past studies over gradients of N deposition. By looking at organic matter manipulations in two very www.elsevier.com/locate/foreco Forest Ecology and Management 214 (2005) 320-330 The research described herein was developed by the author, an employee of the US Environmental Protection Agency (EPA), prior to his employment with EPA. It was conducted independent of EPA employment and has not been subjected to the Agency's peer and administrative review. Therefore, the conclusions and opinions drawn are solely those of the author and are not necessarily the views of the Agency.

Agriculture and Food, Jul 19, 2018

International journal of horticultural science, Apr 25, 2012

Acta agraria Debreceniensis, Sep 14, 2005

termesztési körülmények között Nagykutason. A vizsgálat során a gyümölcsök átmér�jét, magasságát,... more termesztési körülmények között Nagykutason. A vizsgálat során a gyümölcsök átmér�jét, magasságát, szélességét, kocsányhosszát és szártömegét, gyümölcs-és k�magtömegét, valamint az összes oldható szárazanyagtartalmát mértük. A fajták között számottev� különbségeket állapítottunk meg mindhárom gyümölcsméretet jellemz� tulajdonság és a gyümölcstömeg tekintetében. A fajták között megállapított különbség a fajtatulajdonságoknak köszönhet�, mivel az egyéb körülmények megegyeztek. 11 fajta esetében több (2-4) alkalommal is gy�jtöttünk gyümölcsmintát. Ezek vizsgálata során megfelel� képet kaptunk arról, hogy az optimálisnál korábbi, illetve kés�bbi szedés hogyan befolyásolja a gyümölcs min�ségét.

University of Debrecen Electronic Archive (University of Debrecen), Dec 1, 2008

University of Debrecen Electronic Archive (University of Debrecen), Dec 1, 2008

University of Debrecen Electronic Archive (University of Debrecen), Dec 1, 2008

Frontiers in Plant Science

Free-floating and rootless submerged macrophytes are typical, mutually exclusive vegetation types... more Free-floating and rootless submerged macrophytes are typical, mutually exclusive vegetation types that can alternatively dominate in stagnant and slow flowing inland water bodies. A dominance of free-floating plants has been associated with a lower number of aquatic ecosystem services and can be explained by shading of rootless submerged macrophytes. Vice versa, high pH and competition for several nutrients have been proposed to explain the dominance of rootless submerged macrophytes. Here, we performed co-culture experiments to disentangle the influence of limitation by different nutrients, by pH effects and by allelopathy in sustaining the dominance of rootless submerged macrophytes. Specifically, we compared the effects of nitrogen (N), phosphorus (P), iron (Fe) and manganese (Mn) deficiencies and an increased pH from 7 to 10 in reducing the growth of free-floating Lemna gibba by the rootless Ceratophyllum demersum. These macrophyte species are among the most common in highly eut...

International journal of horticultural science, May 10, 2010

Analele Universităţii din Oradea, Fascicula: Protecţia Mediului, 2008

The effect of some plant growth bioregulators on the macronutrients content in leaves of six year... more The effect of some plant growth bioregulators on the macronutrients content in leaves of six years old 'Gönci magyar kajszi' and 'Mandulakajszi' apricot trees (Prunus armeniaca L) on the different phenological stages were studied. The experiment was conducted in Central-Hungary on mature cv. 'Gönci magyar kajszi' and 'Mandulakajszi' grafted on myrobalán rootstock in 2007. Trees spaced 6 x 4 m, and growing in a chernozem soil at Sóskút in Central-Hungary. Trees were foliar-fertilized with Bioplasma and Naturkomplex as fertilizers and their combination. Foliar sprays were performed: (1) at the stage of white bud, (2) at full bloom and (3) at the stage of intensive shoot growing. In each of spring spray treatments, fertilizers were applied at a rate of 5L ha −1. Trees untreated with fertilizers served as a control. Treatments had no effect on leaf nitrogen. All applied treatments increased leaf phosphorous compared to the control. Consequent effect of treatments was not observed during examined period neither at 'Gönci magyar kajszi' nor 'Mandulakajszi' regarding leaf potassium. However, treatments increased leaf Ca significantly at all sampling time at 'Gönci magyar kajszi'. Treatments had no influenced N, P, K and Ca uptake of different cultivars. Moreover, treatments affected Mg uptake differently at examined cultivars.

Acta Agraria Debreceniensis

AIt is a huge challenge for farmers worldwide to successfully increase the organic matter content... more AIt is a huge challenge for farmers worldwide to successfully increase the organic matter content of their soils and improve their water balance at the same time. Therefore, the main aim of the study is to develop and test organic-based nutrient composite materials that can be successfully used by farmers to increase soil organic matter content, improve water management parameters and implement water-efficient technologies. The study was performed in the orchard of the Institute of Horticultural Science of the University of Debrecen in Hungary (Debrecen-Pallag). The experiment was set up in a ten-year-old apple (Malus domestica ‘Pinova’) orchard. In the trial, fermented poultry manure and superabsorbent polymers (SAP) were used at different doses to study their effects on soil properties and fruit quality. Applied composite materials increased the nitrate and organic nitrogen content of the soil. Treatments did not affect the sugar content of the fruits but significantly and positiv...

International Journal of Horticultural Science, 2010

Produce of harmonic nutrient balance and status of trees is basic task of growers for qualified f... more Produce of harmonic nutrient balance and status of trees is basic task of growers for qualified fruit growing. The role of croploaded is essential to grow the productivity of trees without nutrient disorder or other nutritional problems. To reduce the frequency of biennialbearing there are some ways (site and species selection, crop regulation, irrigation, nutrition etc.) from them one is the best easy way theproper site and species oriented nutrition. Sometimes the responsible for irregular cropping is the insufficient fertilization. Observed irregularcropping at two apple cultivars (Malus domestica Borkh., cv. ‘Summerred’ and cv. ‘Mutsu’) in an integrated apple orchard at Hajdúnánás-Tedej, in 2007 resulted a chance to determine nutritional status of “bearing” and “non bearing” trees and investigate the effects of irregularcropping on nutrient uptake and possibilities of correction. Our results pointed out that irregularity is connection on nutrition status of trees.Irregular cropp...

Acta agraria Debreceniensis, May 26, 2022

In our study, the effect of fermented and specially added poultry manure products (superabsorbent... more In our study, the effect of fermented and specially added poultry manure products (superabsorbent polymer (SAP), bentonite an d Aegis as a mycorrhizal inoculum) were investigated in a short soil incubation experimentat 60% water capacity level-on sandy soil. Soil samples were collected from two layers of the incubation pots after the second and fourth week to check the status of the tested products and the processes in the soil. The pH and the electric conductivity (EC) of the samples were measured using an electrochemical method, while the ammonium and nitrate content of the samples was determined with a photometric method. Soil pH and EC values slightly were decreased du ring the experiment. Our results pointed out that the increasing dose of SAP caused lower soil pH. The nitrate content of the soil did not change significantly during the experiment. It was found that the increasing SAP content in the products, due to its cross-linked structural property, protected the nitrate ions from leaching. Our results suggest that applied SAP does not bind the nutrient ions so tightly in its structure that it competes with the plant for uptake.

Acta agraria Debreceniensis, May 26, 2022

According to the Green Deal efforts, the importance and relevance of organic fertilization will i... more According to the Green Deal efforts, the importance and relevance of organic fertilization will increase in the near future. Therefore, the investigation of the effects of different organic fertilizers on soil productivity and nutrient supply is a priority area of agricultural research. Organic fertilizer experiment was conducted in an eight-year-old apple (Malus domestica Borkh.) orchard at Debrecen-Pallag. In the trial Pinova cultivar was used. In this study, two different fermented chicken manure products were added to the soil (in 20 cm depth) to test their effects on soil nutrient status, plant uptake and fruit quality. It was found that the applied treatments slightly increased the pH and nutrient levels in almost all cases, but significant effect was not observed in all treatments compared to the control. Leaf nutrient contents (N, P, K, Ca and Mg) were measured in the experiment. Leaf nutrient status was not affected by the fermented chicken manure treatments. Ho wever, used treatments had strong effects on the fruit characteristics and inner parameters, such as fruit diameter and Brix value. Moreover, it was established that the applied organic fertilizers increased the yield significantly.

Frontiers in Plant Science, 2020

Two submerged Elodea species have small differences in their ecophysiological responses when expo... more Two submerged Elodea species have small differences in their ecophysiological responses when exposed to individual environmental factors. However, field observations showed that under eutrophic conditions with low light availability, Elodea canadensis could be displaced by Elodea nuttallii. Here we investigated the combined effect of environmental factors on the ecophysiological response of the two species in order to explain the differences in their invasion successes. We cultivated the plants in aquaria containing five different nitrogen (N) concentrations and incubated at five different light intensities. For both species increasing nitrogen concentrations resulted in increased relative growth rate, chlorophyll concentration, and actual photochemical efficiency of photosystem II (F PSII), however, they produced less roots. Lowering light intensity resulted in a lower relative growth rate, root production, and nutrient removal. In contrast, chlorophyll concentration in the leaves, and F PSII increased. The main difference between the two Elodea species was that the light compensation point (I c) and weight loss in the dark were significantly higher and photochemical efficiency and chlorophyll concentration were significantly lower for E. canadensis than for E. nuttallii, indicating that the latter can survive under much more shady and hypertrophic conditions. The change in nitrogen concentration of the media and in tissue concentration of the plants indicated that E. nuttallii has a higher nitrogen removal capacity. The ecophysiological differences between the two species can be an explanation for invasion success of E. nuttallii over E. canadensis and thus may explain why the latter is replaced by the first.

Plants

In order to investigate the abiotic stress (drought) tolerance of oat (Avena sativa L.) with sili... more In order to investigate the abiotic stress (drought) tolerance of oat (Avena sativa L.) with silicon and sulphur foliar fertilisation treatments, and monitor the effect of the treatments on the physiology, production, stress tolerance, plant, and grain quality of winter oat varieties, a field experiment was conducted in the growing season of 2020–2021. As a continuation of our article, published in another Special Issue of Plants, in this publication we evaluate the effect of silicon and sulphur treatments on the quality of winter oats. The whole grain sulphur content was significantly different between varieties. The foliar fertiliser treatments caused greater differences in both the carbon and nitrogen, and sulphur contents in the green plant samples, compared to the differences measured in the grain. Foliar treatments had a significant effect on the sulphur content of both plant samples and grains. Significant differences in the Al, Ba, Ca, Cu, Fe, K, Mn, Mo, Na, Ni, P, Pb, Sr, a...

Notulae Scientia Biologicae, 2012

Edible nuts have an increasing role in human diet. Pistachio is a popular but less known kind of ... more Edible nuts have an increasing role in human diet. Pistachio is a popular but less known kind of edible nut nevertheless it is rich in health benefiting nutrients, minerals, antioxidants and vitamins. Therefore, this study attempts to determine the antioxidants capacity, total phenolics and amount of some major elements (nitrogen, potassium, calcium and phosphorus), present in the most important Iranian pistachio nut, to enhance the health benefits, and use in breeding programs. For this reason eleven pistachio cultivars (‘Akbary’, ‘Ahmad Aghaii’, ‘Daneshmandi’, ‘Kalle Ghoochi 1’, ‘Kalle Ghoochi 2’, ‘Garmeh’, ‘Ohadi 1’, ‘Ohadi 2’, ‘Sefid’, ‘Momtaz’, and chance seedling tree ("None-grafted") as control) which are grown in commercial orchards of Fayzabad (Khorasan-e-Razavi) were analyzed for determination of some major elements, antioxidants capacity and total phenolics contents. The results showed that the amounts of the nutrients in 100 g kernel were within the following r...

International Journal of Horticultural Science, 2011

Similarly to 2007, 2011 was also critical year for fruit growers in Eastern-Hungary. Serious fros... more Similarly to 2007, 2011 was also critical year for fruit growers in Eastern-Hungary. Serious frost damage was observed at lateblooming period (6 May (T=-1.6°C)) in this region, which caused approximately 60-65% of fruit loss.The aim of this study is to investigate the effects of a spring frost event on nutrient uptake and status of the trees of a sour cherry plantationat Újfehértó.The symptoms of frost were observed visually. This visual observation was confirmed by SPAD readings. The frost affected the macroandmicronutrient contents of leaves.It was found that the frost affected the nutrient uptake negatively, but the effect of it was not significantly sometimes. It can be stated thatthe nutrient demand of trees can be supplied only under even worse conditions.

International Journal of Horticultural Science, 2012

Foliar nutrition experiment was made to investigate the effect of algae products on fruit quality... more Foliar nutrition experiment was made to investigate the effect of algae products on fruit quality of apples (Malus domesticaBorkh.).The study was conducted in 2011 at Siófok inWest-Hungary on cv. ‘Jonagored’ and ‘Idared’grafted on M9 rootstock.In our trial leaf diagnostic and fruit quality measurements were made to study the effectiveness of applied products. Relative leaf chlorophyllcontent was determined by a portable chlorophyll meter. Fruit weight and shape index were measured. Fruit inner qualifying parameters liketitratable acid content and Brix value were also determined.It can be stated that the used products had traceable effect on investigated fruit parameters. Although, leaf N content was not effected bytreatments significantly, relative leaf chlorophyll content significantly increased by both treatments.Used products significantly increased the fruit weight and shape index. Applied treatments significantly decreased the pH of pulp. Treatmentsincreased the acid contents (...

International Journal of Horticultural Science, 2010

The heavy metals pollution is one of the problems that arise due to the increased uses of fertili... more The heavy metals pollution is one of the problems that arise due to the increased uses of fertilizers and other chemicals to meet the higher demands of food production for human consumption. In order to assess possible health risk of apricot (Prunus armeniaca L.) consumption, levels of Arsenic, Cadmium, Mercury and Lead were determined in fresh and dried samples of "Jumbo cot", "Tom cot", "Gold strike", "Gold bar", "Bergeron", "Bergarouge", "Sweet cot", "Yellow cot" and "Zebra" apricot cultivars. Wet digestion of samples with concentrate HNO3 – H2O2 digester mixture and inductively coupled plasma–atomic emission spectroscopy was used. Highest content of As, Cd, Hg and Pb among all cultivars, were 0.5, 0.04, 1.5 and 0.5mg/kg of dried apricot samples. Fresh fruit samples also contain 0.2, 0.016, 0.6 and 0.2 mg/kg of Arsenic, Cadmium, Mercury and Lead respectively. Daily intake of metals, hazard q...

Forest Ecology and Management, 2005

Soil nitrogen transformations are intricately linked to carbon transformations. We utilized two e... more Soil nitrogen transformations are intricately linked to carbon transformations. We utilized two existing organic matter manipulation sites in western Oregon, USA and Hungary to investigate these linkages. Our questions were: (1) what effect does the quantity and quality of organic matter have on net and gross N processing in mineral soil? and (2) do these effects vary across sites with very different climate, soils, vegetation, and N deposition status? The organic matter manipulations had small if any effects on gross and net N cycling rates. Gross N cycling rates under low N deposition increased with increasing soil C and N, but C:N ratio had no correlation with gross N cycling rates. Soil ammonium concentrations under high N deposition, however, were higher in the organic matter manipulation plots without roots and lower in plots with double litter, indicating a tree root effect and a litter immobilization effect, respectively, but did not differ significantly under low N deposition. Net ammonium production was lowest in the litter removal and root removal plots and highest in the litter addition plots at both sites. Gross and net N cycling rates and mineral nitrogen pool sizes were generally higher under higher N deposition and lower C:N ratio soil, which was consistent with past studies over gradients of N deposition. By looking at organic matter manipulations in two very www.elsevier.com/locate/foreco Forest Ecology and Management 214 (2005) 320-330 The research described herein was developed by the author, an employee of the US Environmental Protection Agency (EPA), prior to his employment with EPA. It was conducted independent of EPA employment and has not been subjected to the Agency's peer and administrative review. Therefore, the conclusions and opinions drawn are solely those of the author and are not necessarily the views of the Agency.