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1.
001-es BibID:
BIBFORM100839
Első szerző:
Juhász Evelin Kármen (környezetgazdálkodási agrármérnök)
Cím:
Evaluating changes in nitrogen and sulphur content in a soil-plant system in a long-term fertilization experiment / Juhász Evelin Kármen, Balláné Kovács Andrea
Dátum:
2020
ISSN:
1587-1282
Megjegyzések:
The objective of this study was to evaluate the impact of long term NPK fertilization (considering that S containing superphosphate was supplied for 26 years of experiment, but since 9 years S has not used any longer) on sulphur-and nitrogen content and N/S ratio of winter wheat. The second objective of this work was to determine the changes of the amount of the different nitrogen and sulphur fraction in chernozem soil in a long term fertilization experiment. The third aim of the work was to determine if arelationship could be established between the studied parameters.Based on our results, it can be stated that the sulphur containing superphosphatesupplied in the period of 1984?2010 has no longer significant effect on total sulphur content of plant in 2018. The NPK fertilization treatments had positive effect on total nitrogen content of winter wheat. In general, increasing NPK doses resulted in significantly higher nitrogen. The effect of irrigationapplied in previous years has no statistically significant effect on the sulphur and nitrogen content of wheat. The wheat grain produced in our experiment, especially in fertilized treatments showed S deficiency. Analysing the changes of CaCl2soluble nitrate-N and total N of the soil, it can be stated that the effect of increasing fertilizer doses clearly appearsin these parameters, because the treatment with increasing fertilizer doses resulted higher CaCl2soluble N forms compared to the control treatment in soil. These values increased until flowering stage of wheat and after that a slightly decrease was observed as a result of higher N uptake of plant. In overall, it can be stated, that the effect of superphosphate on measured sulphur fraction is prevailed. With increasing fertilizer doses higher sulphatecontent was detected in soil, but the sulphate content measured in different soil extractant is not enough for the wheat in this experiment area. Studying the correlation between the measured parameters of plant and soil, it can be concluded, that the relationships between nitrogen in the plant and in the soil is stable, and did not change during the growing season. The correlation between plant S and soil S varied in the measured periods and the r value was low in most cases. At the stage of flowering thehighest r value was found between KCl-SO4and plant S. In the stage of ripening the strongest correlation was detected between KH2PO4-SO4and grain S content.
Tárgyszavak:
Agrártudományok
Növénytermesztési és kertészeti tudományok
idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:
Agrártudományi közlemények = Acta agraria Debreceniensis. - 2020 : 2 (2020), p. 77-85. -
További szerzők:
Balláné Kovács Andrea (1967-) (vegyész)
Pályázati támogatás:
EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
Internet cím:
Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:
2.
001-es BibID:
BIBFORM099338
Első szerző:
Juhász Evelin Kármen (környezetgazdálkodási agrármérnök)
Cím:
Effect of different sources and doses of sulphur on yield, nutrient content and uptake by spring wheat / Juhász Evelin Kármen, Balláné Kovács Andrea
Dátum:
2021
ISSN:
1587-1282
Tárgyszavak:
Agrártudományok
Növénytermesztési és kertészeti tudományok
idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:
Agrártudományi közlemények = Acta agraria Debreceniensis. - 2021 : 1 (2021), p. 109-115. -
További szerzők:
Balláné Kovács Andrea (1967-) (vegyész)
Internet cím:
Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:
3.
001-es BibID:
BIBFORM090037
Első szerző:
Juhász Evelin Kármen (környezetgazdálkodási agrármérnök)
Cím:
Evaluating of soil sulphur forms changes in long-term field experiments of Látókép / Juhász Evelin Kármen, Balláné Kovács Andrea
Dátum:
2019
ISSN:
1587-1282
Megjegyzések:
The aim of this work was to evaluate the changes of different sulphur forms (soluble, adsorbed) in chernozem soil in a long-term field experiment supplied with increasing doses of NPK fertilizers for a long time. In addition, other objective of this study included the examination of the applicability of recommended extractants of the different sulphate fraction in Hungarian soils. A long-term field experiment was established at the Research Station of Látókép of the University of Debrecen in 1984. In addition to control, two levels of NPK fertilizer doses have been used with irrigated and non-irrigated variants. Winter wheat and corn were cropped in a crop rotation on plots. Soil samples were collected in three different development stages of winter wheat, at the stage of stem elongation (April), flowering (May) and ripening (June of 2018) from the topsoil (0?20 cm) of experiment plots. Water-soluble inorganic sulphate was extracted with 0.01M CaCl2 solutions. The soluble plus adsorbed sulphate was extracted with 0.016M KH2PO4 solution. Sulphate was measured by turbidimetric method. 0.01M CaCl2-SO42? ranged between 0.293?1.896 mg kg-1 and the 0.016 M KH2PO4-SO42- varied between 5.087?10.261 mg kg-1. The values of KH2PO4 SO42- was higher than that of CaCl2-SO42-, because KH2PO4 extracted the adsorbed and soluble fractions of sulphate, while CaCl2 extracted the soluble sulphate fraction. The amount of absorbed sulphate was calculated by the differences of KH2PO4- SO4 and CaCl2-SO4. The KH2PO4 characterizes mainly the adsorbed sulphate fraction much more than the water-soluble fraction. KCl is the most widely used extractant for the determination of plant available sulphate content of soil in Hungary; therefore, KCl-SO42- fraction also was determined. The KCl-SO42- ranged between 0.328?2.152 mg kg-1. The CaCl2-SO42- and KCl-SO42- fractions were compared and based on Pearson's linear correlation, moderate correlation was established (r=0.511) between them. In all three extractant (0.01M CaCl2, 1M KCl, 0.016 M KH2PO4) higher sulphate fractions were measured in the fertilized plots where superphosphate had been supplied for ages until 2010. The arylsulphatase activity of soil also was determined and ranged between 9.284 and 26.860 ?g p-nitrophenol g-1 h-1. The lowest value was observed in the treatment with highest NPK2 dose, both in irrigated and non-irrigated areas.
Tárgyszavak:
Műszaki tudományok
Bio-, környezet- és vegyészmérnöki tudományok
idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Megjelenés:
Agrártudományi közlemények = Acta agraria Debreceniensis. - 2 (2019), p. 71-76. -
További szerzők:
Balláné Kovács Andrea (1967-) (vegyész)
Pályázati támogatás:
EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
Internet cím:
Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:
4.
001-es BibID:
BIBFORM079235
Első szerző:
Juhász Evelin Kármen (környezetgazdálkodási agrármérnök)
Cím:
The effect of sulphur and nitrogen supply on the growth and nutrient content of spring wheat (Triticum aestivum L.) / Juhász Evelin Kármen, Balláné Kovács Andrea
Dátum:
2018
ISSN:
1587-1282
Megjegyzések:
Sulphur is an essential element for plants. Decreasing sulphur deposition from the air, and the use of more concentrated phosphate fertilizers, which contain no sulphur, has led to reports of sulphur deficiencies for wheat. Sulphur deficiency significantly affects yield and also the quality of wheat. The pot experiment was set up on calcareous chernozem soil at Látókép, Hungary, test plant was spring wheat (Triticum aestivum L). Seven treatments were used where nitrogen and sulphur were supplied as soil fertilizers in increasing rates (NS1, NS2, NS3) and in foliar fertilizer as well (NS1+fol., NS2+fol., NS3+fol.). Plant aboveground biomass production was determined in samples taken in the stages of development BBCH 29-30, 51-59, 61-69, 89. The nitrogen and sulphur content of straw and grain were measured. N/S ratios of grain and straw were calculated. The weights of grain were ranging between 8.6?16.1 g/pot. NS2 and NS2+fol. treatments produced the highest values. Foliar fertilizer had no further effect on grain. Analysing the values of the straw, it was observed that tendencies were similar to values of grain. The NS2 treatment produced the highest weight of straw and the NS3 rate already decreased that amount. The obtained results show the unfavourable effect of excessively high rate applied in NS3 treatment. The supplementary foliar fertilizer had nosignificant influence on the weight of straw. Both N and S-uptake of plant was very intensive at the stem elongation stage, then the N and S-content of plant continuously decreased in time in all treatments. The N-content of grain ranged between 2.215?2.838%. The N-content of grain slightly increased with increasing of nitrogen doses. In the higher doses (NS2, NS3) foliar fertilization slightly increased the nitrogen content of grain, although this effect was not statistically proved. The N-content of straw varied from 0.361 to 0.605%.The growing dose of soil fertilizer also considerably increased the nitrogen content of straw. Foliar fertilization further increased the nitrogen content of straw.The S-content of grain ranged between 0.174?0.266%.The lowest fertilizer dose (NS1) significantly increased the sulphur content of grain. The further increasing fertilizer doses (NS2, NS3) did not cause additional enhance in sulphur content of grain. The foliar fertilizer also did not change the sulphur value of plant. The increasing amount of soil fertilizer and the supplementary foliar fertilizer had no effect on the sulphur content of straw. The treatments influenced the N/S ratios of grain and straw. On the basis of experimental results it can be concluded that the examined nitrogen and sulphur containing soil fertilizer had positive effect on the growth and yield of spring wheat grown on the calcareous chernozem soil. The soil fertilizer application enhanced the grain nitrogen and sulphur content. The highest rate of fertilizer (600 kg ha-1) proved to have decreasing effect on the yield. The sulphur and nitrogen containing foliar fertilizer did not have significant effect on the yield parameters but slightly increased the nitrogen content of plant.
Tárgyszavak:
Agrártudományok
Növénytermesztési és kertészeti tudományok
idegen nyelvű folyóiratközlemény hazai lapban
spring wheat
sulphur
nitrogen
fertilization
yield
nutrient content
Megjelenés:
Agrártudományi Közlemények = Acta agraria Debreceniensis. - 74 (2018), p. 65-70. -
További szerzők:
Balláné Kovács Andrea (1967-) (vegyész)
Pályázati támogatás:
EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
Internet cím:
Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:
5.
001-es BibID:
BIBFORM075994
Első szerző:
Juhász Evelin Kármen (környezetgazdálkodási agrármérnök)
Cím:
Impact of nitrogen and sulphur fertilization on the growth and micronutrient content of spring wheat (Triticum aestivum L.) / Evelin Kármen Juhász, Andrea Balláné Kovács
Dátum:
2018
ISSN:
1587-1282
Megjegyzések:
Micronutrients are as important as macronutrients for crops. Each micronutrient has own function in plant growth. Zinc is important for membrane integrity and phytochrome activities. Copper is an essential micronutrient required for the growth of wheat. Manganese is required for enzyme activation, in electron transport, and in disease resistance. The pot experiment was set up in greenhouse on calcareous chernozem soil Debrecen-Látókép with a spring wheat. In certain development stages (according to BBCH growth scale of wheat), at the beginning of stem elongation (29-30), at the heading (51-59), at the flowering (61-69) stage three average plants were removed from all pots for analysis. Fresh and dry weight of the plant samples were measured. Plant leaves after drying were digested by HNO3-H2O2 methods and manganese, zinc and copper contents of plant were quantified by atomic absorption spectrophotometry. At the stage of flowering, when the nutrient uptake of plant is the most intensive, the weight of wheat ranged between 0.94-1.57g/plant. In this development stage, the NS2 treatment produced the highest weight of wheat, and compared to this the NS3 treatment decreased that value already. The results show unfavourable effect of NS3 treatment. On the basis of microelement content of wheat and the weight of a plant, nutrient uptake by plant were calculated. At the beginning of growth the starter treatment had positive effect on Cu-uptake compared to the NS1 treatment, where the same dose of fertilizer was stirred into the soil. Wheat is very sensitive to copper deficiency, so copper dissolved by starter treatment could be favourable to the early development of wheat. At flowering stage the Zn-uptake of wheat became the highest and it was between 133.7-234.6mg/plant. The Mn-uptake of wheat plant was higher than the Cu- and Zn-uptake of wheat. This phenomenon can be explained by the fact that the untreated soil had higher Mn-content, than Cu- and Zn-content. To summarize the results, it can be stated, that the copper-uptake of wheat was more affected by the different treatments in the stage of stem elongation, while Mn- and Zn-uptake of wheat were influenced primarily in the stage of heading and flowering.
Tárgyszavak:
Agrártudományok
Növénytermesztési és kertészeti tudományok
idegen nyelvű folyóiratközlemény hazai lapban
Megjelenés:
Agrártudományi közlemények = Acta agraria Debreceniensis. - 150 (2018), p. 211-219. -
További szerzők:
Balláné Kovács Andrea (1967-) (vegyész)
Pályázati támogatás:
EFOP-3.6.3-VEKOP-16-2017-00008
EFOP
GINOP-2.2.1-15-2016-0001
GINOP
Internet cím:
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:
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