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1.

001-es BibID:BIBFORM087884
Első szerző:Davarynejad, Gholamhossein H.
Cím:Hazardous element content and consumption risk of 9 apricot cultivars / Davarynejad Gholamhossein H., Vatandoost Jartoodeh Safieh, Soltész Miklós, Nyéki József, Szabó Zoltán, Nagy Péter Tamás
Dátum:2010
ISSN:1585-0404
Megjegyzések: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 quotient and health risk index to reveal health risk possibility of dried and fresh fruits consumption were calculate and compared.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Prunus armeniaca L.
chemical composition
heavy metals
health risk index
Megjelenés:International Journal of Horticultural Science. - 16 : 4 (2010), p. 61-65. -
További szerzők:Vatandoost, Jartoodeh Safieh Soltész Miklós (1944-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök) Szabó Zoltán (1960-) (kertészmérnök) Nagy Péter Tamás (1970-) (vegyész)
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2.

001-es BibID:BIBFORM106292
Első szerző:Nagy Péter Tamás (vegyész)
Cím:The effect of climatic anomalies on the nutrient supply of fruit plantations (Minireview) / Nagy P. T., Sipos M., Szabó Z., Soltész M., Nyéki J.
Dátum:2009
ISSN:1585-0404
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:International Journal of Horticultural Science. - 15 : 1-2 (2009), p. 111-116. -
További szerzők:Sipos Marianna (1984-) (környezetgazdálkodási agrármérnök) Szabó Zoltán (1960-) (kertészmérnök) Soltész Miklós (1944-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök)
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3.

001-es BibID:BIBFORM093941
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Effect of late spring frost event on nutrition aspects of a sour cherry orchard in East Hungary / Nagy P. T., Kincses I., Nyéki J., Szabó T., Soltész M., Szabó, Z.
Dátum:2011
ISSN:1585-0404
Megjegyzések:Similarly to 2007, 2011 was also critical year for fruit growers in Eastern-Hungary. Serious frost damage was observed at late blooming 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 plantation at Újfehértó. The symptoms of frost were observed visually. This visual observation was confirmed by SPAD readings. The frost affected the macroand micronutrient 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 that the nutrient demand of trees can be supplied only under even worse conditions.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Prunus cerasus L.
climatic anomalies
frost event
nutrient uptake
fruit quality
Megjelenés:International Journal of Horticultural Science. - 17 : 4-5 (2011), p. 93-97. -
További szerzők:Kincses Sándorné (1964-) (agrokémia) Nyéki József (1944-2022) (kertészmérnök) Szabó T. Soltész Miklós (1944-) (kertészmérnök) Szabó Zoltán (1960-) (kertészmérnök)
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4.

001-es BibID:BIBFORM087850
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Effects of irregular cropping on nutrient uptake and status of apple trees / Nagy Péter Tamás, Szabó Zoltán, Soltész Miklós, Nyéki József
Dátum:2010
ISSN:1585-0404 2676-931X
Megjegyzések:Produce of harmonic nutrient balance and status of trees is basic task of growers for qualified fruit growing. The role of crop loaded is essential to grow the productivity of trees without nutrient disorder or other nutritional problems. To reduce the frequency of biennial bearing there are some ways (site and species selection, crop regulation, irrigation, nutrition etc.) from them one is the best easy way the proper site and species oriented nutrition. Sometimes the responsible for irregular cropping is the insufficient fertilization. Observed irregular cropping 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 irregular cropping on nutrient uptake and possibilities of correction. Our results pointed out that irregularity is connection on nutrition status of trees. Irregular cropping results in insufficient nutrient uptake and disharmony of nutrients. For this reason, the establishment of nutrient status of "non bearing" trees is could permit a chance to correct and improve the nutrient supply of trees which help to breakdown the vicious circle of irregularity.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
cropping
nutrient
apple
Megjelenés:International Journal Of Horticultural Science. - 16 : 1 (2010), p. 41-44. -
További szerzők:Szabó Zoltán (1960-) (kertészmérnök) Soltész Miklós (1944-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök)
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5.

001-es BibID:BIBFORM087863
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Importance of orchard floor management in organic fruit growing (nutritional aspects) / Nagy Péter Tamás, Kincses Ida, Lang T., Szőke S. L., Nyéki József, Szabó Zoltán
Dátum:2010
ISSN:1585-0404 2676-931X
Megjegyzések:Worldwide research goals and concerns are to soil conservation and improve. This conception is mostly actual in horticulture where the numbers of high-density plantings are continuously increasing. High-density orchards cause more intensive nutrient and water uptake. So that the preservation of soil moisture and nutrient level are key factors in qualified fruit growing. On the other hand due to the climatic changes the water supply of trees will be satisfied among worse conditions than some decades ago. Appearance of water supply problems and water stress is increased in organic growing, where the number of corrections is limited anyway. Furthermore, floor management is a successful tool in weed management which causes many problems for organic growers due to the prohibition of synthetic herbicides. This paper will mainly focus on the nutritional aspects of methods of orchard floor management for growers adopting organic fruit management to make their production profitable.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
floor management
mulching
weed control
organic growing
Megjelenés:International Journal of Horticultural Science. - 16 : 3 (2010), p. 61-67. -
További szerzők:Kincses Sándorné (1964-) (agrokémia) Lang T. Szőke Sándor (1985-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök) Szabó Zoltán (1960-) (kertészmérnök)
Pályázati támogatás:OM-00042/2008
Egyéb
OM-00265/2008
Egyéb
OM-00270/2008
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6.

001-es BibID:BIBFORM087862
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Nutritional aspects of producing fruits organically / Nagy Péter Tamás, Nyéki József, Szabó Zoltán
Dátum:2010
ISSN:1585-0404 2676-931X
Megjegyzések:Recent interest to avoid use of agrochemicals in fruit growing to safeguard environmental and human health has stimulated interest in organic fruit production (OFP) all over the world. Organic production requires a holistic approach to agricultural ecosystem management. Because of the perennial nature of orchards, this is not a great departure from conventional orchard management, except that corrective techniques are limited primarily to naturally derived materials. Organic mineral nutrition management hinges on two principles: 1) practices that lead to the build up and maintenance of soil that is biologically active and high in organic matter; 2) supplementing the mineral nutrients provided by the soil with fertilizers from approved sources. Organic orchards should be sited on land with superior soils and preplant soil preparation to increase organic matter and correct any sub-optimal soil characteristics. For successful organic fruit growing the following statement should be considered:Weed management is critical to reduce competition for nutrients and water. Soil and leaf analysis provide the basis for correcting mineral nutrient deficiencies or imbalances in organic production. It may be necessary to use a number of strategies to supply mineral nutrients over the life of the orchard. The slower, natural methods applied require a management approach that is simultaneously patient and dynamic.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
nutritional management
nutrient diseases
organic growing
Megjelenés:International Journal of Horticultural Science. - 16 : 3 (2010), p. 69-74. -
További szerzők:Nyéki József (1944-2022) (kertészmérnök) Szabó Zoltán (1960-) (kertészmérnök)
Pályázati támogatás:OM-00042/2008
Egyéb
OM-00265/2008
Egyéb
OM-00270/2008
Egyéb
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7.

001-es BibID:BIBFORM056211
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Study on the micronutrient content of soil and leaf of an organic apple orchard in Eastern Hungary / Nagy Péter Tamás, Gonda István, Dremák Péter, Holb Imre
Dátum:2006
ISSN:1585-0404
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
apple
organic fruit production
soil and leaf analysis
micronutrient uptake os apple cultivars
Megjelenés:International Journal of Horticultural Science. - 12 : 3 (2006), p. 7-11. -
További szerzők:Gonda István (1947-2022) (kertészmérnök) Dremák Péter (1975-) (agrármérnök) Holb Imre (1973-) (agrármérnök)
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8.

001-es BibID:BIBFORM005681
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Impact of boron foliar fertilization on annual fluctuation of B in sweet cherry leaves and fruit quality / Péter Tamás Nagy, Sándor Thurzó, Zoltán Szabó, József Nyéki
Dátum:2008
Megjegyzések:The goal of the study was to examine response of sweet cherries (Prunus avium L.) to boron (B) fertilization. The experiment was conducted during 2005?2007 in West Hungary on mature cv. Germersdorfi 3' grafted on Prunus mahaleb rootstock. Sweet cherry trees planted on a calcareous chernozem soil. Trees were foliar-fertilized with B. Foliar B sprays were performed: (1) in the spring, at the stage of white bud, beginning of flowering (B1), and (2) repeated 5 weeks after full bloom (B2). In each of spring spray treatments, B was applied at a rate of 0.15 kg ha1. Trees untreated with B served as a control. The results showed that B fertilization had effect on B concentration in leaf tissues, mostly after ripening. B was present significantly higher amount in leaf in treated samples after ripening. Mean fruit weight was slightly increased by B fertilization. Fruit sensitivity to cracking was not influenced by B fertilization. Nevertheless, from our data it can be conclude that the sensitivity of fruit to cracking is improved when the fruit is riper, the fruit density and fruit weight are higher. The soluble solids varied between 15.0 and 15.9% according to the treatments. Our results for the monosaccharides investigated varied between 5.1 and 7.2 as glucose and fructose as well. Galactose and sucrose was detected very small amount in the unprocessed cherries. Applied B treatments increased sugar contents but decreased organic acid contents in sweet cherry fruits. It is concluded that under conditions of this experiment, B fertilization can be recommended in sweet cherry culture to improve fruit quality and their appearance.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
boron fertilization
sweet cherry
foliar nutrition
fruit quality
Megjelenés:International Journal of Horticultural Science. - 14 : 3 (2008), p. 27-30. -
További szerzők:Thurzó Sándor (agrár) Szabó Zoltán (1960-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök)
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9.

001-es BibID:BIBFORM005680
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Effect of foliar fertilization on leaf mineral composition, sugar and organic acid contents of sweet cherry / Péter Tamás Nagy, Sándor Thurzó, Ida Kincses, Zoltán Szabó, József Nyéki
Dátum:2008
Megjegyzések:Influence of a three-year-long foliar fertilization on mineral composition of leaf, content of sugars (glucose, fructose, galactose and sucrose) (Prunus avium L.) and organic acids (citric, malic and fumaric acid) of sweet cherry fruits was studied. The experiment was conducted during 2005?2007 in West Hungary on mature cv. Germersdorfi 3' grafted on Prunus mahaleb rootstock, planted in 1999. Trees spaced 7 x 5 m, and growing in a calcareous chernozem soil. Trees were foliar-fertilized with potassium (K) as KNO3, calcium (Ca) as Ca(NO3)2 and boron (B) as disodium octaborate tetrahydrate. Boron spraying was conducted at blooming time and 5 weeks later. Potassium spraying was carried out 3 and 5 while calcium was applied at 3, 5 and 6 weeks after full bloom. Beside fruit analysis, complete soil and leaf analysis were done to study the rate of nutrient uptake and its effects on fruit quality. Contents of nutrients of soil and leaf were determined by atomic absorption and spectrophotometric method, while sugars and organic acids in fruit were determined by HPLC. The applied treatments (except K1) had been increasing leaf K significantly compared to the control till ripening. Most of treatments had no significant effect on Ca content of leaf till ripening. B was present significantly higher amount in leaf in treated samples after ripening. From applied treatments only the boron treatments had significant increasing effect on contents of all examined sugars, compared the control. Furthermore, the effect of calcium spraying on the contents of organic acids was significant only while boron applications caused lower acid contents in fruit.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
foliar nutrition
cherry
leaf mineral composition
inner parameters of fruit
Megjelenés:International Journal of Horticultural Science. - 14 : 1-2 (2008), p. 45-48. -
További szerzők:Thurzó Sándor (agrár) Kincses Sándorné (1964-) (agrokémia) Szabó Zoltán (1960-) (kertészmérnök) Nyéki József (1944-2022) (kertészmérnök)
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10.

001-es BibID:BIBFORM005677
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Effect of frost damage on leaf macronutrient status of eight apple cultivars in integrated apple orchard in Eastern-Hungary / Nagy P.T., Kátai J., Nyéki J., Szabó Z.
Dátum:2008
Megjegyzések:The year of 2007 was critical for fruit growers in the region of Easter-Hungary. Several orchards were suffered frost damages. Significant frost damage was also happened in the orchard of Tedej Rt., which caused total fruit failure in the orchard. Our study was conducted in the integrated apple orchard (Malus domestica Borkh.) established on a lowland chernozem soil in East-Hungary, to investigate how frost changes the mineral content of different apple species. Leaf samples were collected 100 days after full bloom both in 2006 and 2007. The concentrations of nitrogen, phosphorous, potassium, calcium and magnesium were measured in leaves. The absence of fruits caused a smaller accumulation of nitrogen and magnesium in leaves. Falling down of flowers and fruit sets hindered the translocation of the uptaken phosphorous, potassium and calcium towards fruit sets. Due to fruit failure the vegetative processes became dominant. Leaves larger amount of phosphorous, potassium and calcium stored. Besides the absolute element content, the ratio of the different elements was also determined. Majority of calculated ratios were removed from optimal values due to frost. Both absolute content of nutrients and their ratios pointed out that the frost damage significantly affected the uptake of nutrients and their storing processes.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
apple
nutrition
frost damage
Megjelenés:International Journal of Horticultural Science 14 : 1-2 (2008), p. 37-40. -
További szerzők:Kátai János (1950-) (biológus, hidrobiológus) Nyéki József (1944-2022) (kertészmérnök) Szabó Zoltán (1960-) (kertészmérnök)
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11.

001-es BibID:BIBFORM002534
Első szerző:Nagy Péter Tamás (vegyész)
Cím:Effect of different flower thinning techniques on annual fluctuation of macro and micronutrients in sweet cherries (Prunus avium I.) / Nagy, P.T., Thurzó, S., Racskó, J., Nyéki, J., Soltész, M., Szabó Z.
Dátum:2007
Megjegyzések:The seasonal dynamic of macro- and micronutrients uptake of a sweet cherry cultivar cv. 'Katalin' (Prunus avium L.) was studied according to apply different flower thinning techniques. Beside control treatment, three thinning treatments were performed: (1) thinning for 1 flower/inflorescence, (2) thinning for 2 flower/inflorescence, (3) thinning for 3 flower/inflorescence. Soil examination was carried out to establish the growing conditions of orchard site.Moreover, for studying the temporal dynamic of nutrient uptake plant analytical examination was performed four times per year based on leaf collecting according to the phenological phases. It was found that the macro- and micronutrients contents of leaves were showed significant differences between treatments before ripening, at ripening and after ripening stage. It was found that thinning has influence on mineral composition of leaf. Flower removal unbalanced the equilibrium of generative and vegetative processes. The applied manual flower thinning treatment resulted improving vegetative processes like nutrient uptake and storage.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
tápanyagfelvétel
gyümölcsminőség
cseresznye
kézi ritkítás
Megjelenés:International Journal of Horticultural Science. - 13 : 3 (2007), p. 1-4. -
További szerzők:Thurzó Sándor (agrár) Soltész Miklós (1944-) (kertészmérnök) Racskó József (1979-) (agrármérnök) Nyéki József (1944-2022) (kertészmérnök) Szabó Zoltán (1960-) (kertészmérnök)
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12.

001-es BibID:BIBFORM087890
Első szerző:Racskó József (agrármérnök)
Cím:Characterization of sunburn damage to apple fruits and leaves / Racskó József, Szabó Tibor, Nyéki József, Soltész Miklós, Nagy Péter Tamás, Miller D. D., Szabó Zoltán
Dátum:2010
ISSN:1585-0404
Megjegyzések:The specific conditions of the formation of three different types of sunburn (sunburn browning, sunburn necrosis, and photooxidative sunburn) have been recently characterized on apple fruit. However, no information is still available on leaf damage. Therefore, the aims of this study were i) to extend the knowledge on fruit damage, ii) characterize leaf damage and iii) find relationship between fruit and leaf damage. The observations were made on 586 apple accessions in a gene bank orchard located in Hungary. The incidence of the three different types of fruit symptoms were recorded and based on the visual symptoms, two different types of leaf sunburn (sunburn yellowing and sunburn necrosis) were characterized. The most frequent type of fruit sunburn observed was sunburn browning. Photooxidative sunburn was found for less number of accessions, and only some accessions were affected by sunburn necrosis. Fruit were far more susceptible than leaves; (>60%) of the examined accessions were affected by fruit damage and (<3%) by leaf damage. Although a large number of accessions were affected, the percentage of fruit damaged within accessions was not that excessive; ~6% of the fruit assessed showed the symptoms of sunburn browning. Significantly fewer fruit were damaged by sunburn necrosis (~1%) or photooxidative sunburn (~1.4%) than sunburn browning. The percentage of leaves damaged within accessions were simlarly very low (~1%). Close relationship between fruit and leaf damage was found. Accesions with relatively heavily sunburned leaves usually had severe fruit damage as well. Leaves showing sunburn symptoms were usually closely located around those fruit which were sunburned severely. Leaf damage of sunburn was found on spur leaves in a great majority of the accessions damaged, shoot leaves did not seem to be susceptible to sunburn.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
apple
Malus domestica
sunburn
sunscald
heat stress
temperature
light stress
spur leaves
shoot leaves
Megjelenés:International Journal of Horticultural Science. - 16 : 4 (2010), p. 15-20. -
További szerzők:Szabó Tibor Nyéki József (1944-2022) (kertészmérnök) Soltész Miklós (1944-) (kertészmérnök) Nagy Péter Tamás (1970-) (vegyész) Miller, D. D. Szabó Zoltán
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