Szerző szerinti böngészés "Kincses, I."
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Tétel Szabadon hozzáférhető Effect of foliar fertilization on leaf mineral composition, sugar and organic acid contents of sweet cherry(2008-02-19) Nagy, P. T.; Thurzó, S.; Kincses, I.; Szabó, Z.; Nyéki, J.Influence of a three-year-long foliar fertilization on mineral composition of leaf, content of sugars (glucose, fructose, galactose and sucrose) and organic acids (citric, malic and fumaric acid) of sweet cherry (Prunus avium L.) 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 KNO 3 and calcium (Ca) as Ca(NO3)2. Potassium spraying was carried out 3 (K 1 ) and 5 (K 2 ) while calcium was applied at 3 (Ca 1 ), 5 (Ca 2 ) and 6 (Ca 3 ) 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 K 1 ) 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. 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.Tétel Szabadon hozzáférhető Effect of late spring frost event on nutrition aspects of a sour cherry orchard in East Hungary(2011-12-04) Nagy, P. T.; Kincses, I.; Nyéki, J.; Szabó, T.; Soltész, M.; Szabó, Z.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.Tétel Szabadon hozzáférhető Importance of boron in fruit nutrition(2011-03-15) Nagy, P. T.; Kincses, I.; Nyéki, J.; Soltész, M.; Szabó, Z.Boron (B) is an essential micronutrient in plants especially in fruits. Despite of this fact there are very few information about its application, uptake and symptoms in Hungarian fruit growing sector. Nowadays we should consider the effects of weather conditions on soil B availability increasingly according to the climatic anomalies. Identifying of internal and external symptoms of plant parts (leaf, fruit) is help for growers to recognize the deficiency and excess symptoms in time. Methods and application rates of boron fertilization provide further information for growers to achieve qualify-oriented fruit growing among Hungarian conditions. The aim of this minireview is to focus on the importance of boron in fruit nutrition.Tétel Szabadon hozzáférhető Importance of orchard floor management in organic fruit growing (nutritional aspects)(2010-05-10) Nagy, P. T.; Kincses, I.; Lang, T.; Szőke, S. L.; Nyéki, J.; Szabó, Z.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.