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001-es BibID:	BIBFORM109784
035-os BibID:	(Scopus)85152002959 (WoS)000953872600001
Első szerző:	Tamás András (gazdasági agrármérnök, növénytermesztés és kertészeti tudományok)
Cím:	Assessment of NDVI dynamics of maize (Zea mays L.) and its relation to grain yield in a polyfactorial experiment based on remote sensing / Tamás András, Kovács Elza, Horváth Éva, Juhász Csaba, Radócz László, Rátonyi Tamás, Ragán Péter
Dátum:	2023
ISSN:	0551-3677 1338-4376
Megjegyzések:	Remote sensing is an efficient tool to detect vegetation heterogeneity and dynamics of crop development in real-time. In this study, the performance of three maize hybrids (Fornad FAO-420, Merida FAO-380, and Corasano FAO-490-510) was monitored as a function of nitrogen dose (0, 80 and 160 kg N ha?1 ), soil tillage technologies (winter ploughing, strip-tillage, and ripping), and irrigation (rainfed and 3x25 mm) in a warm temperature dry region of East-Central Europe. Dynamics of the Normalized Difference Vegetation Index (NDVI) were followed in the vegetation period of 2021, a year of drought, by using sensors mounted on an unmanned aerial vehicle. N-fertilization resulted in significantly higher NDVI throughout the entire vegetation period (p < 0.001) in each experimental combination. A significant positive effect of irrigation was observed on the NDVI during the drought period (77-141 days after sowing). For both the tillage technologies and hybrids, NDVI was found to be significantly different between treatments, but showing different dynamics. Grain yield was in strong positive correlation with the NDVI between the late vegetative and the early generative stages (r = 0.80-0.84). The findings suggest that the NDVI dynamics is an adequate indicator for evaluating the impact of different treatments on plant development and yield prediction.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Agriculture-Basel. - 13 : 3 (2023), p. 1-17. -
További szerzők:	Kovács Elza (1976-) (okleveles vegyész, angol-magyar szakfordító, anyagmérnök MSc) Horváth Éva (1993-) (környezetgazdálkodási agrármérnök) Juhász Csaba (1962-) (környezetgazdálkodási agrármérnök) Radócz László (1996-) (Növényorvos) Rátonyi Tamás (1967-) (agrármérnök) Ragán Péter (1986-) (környzetgazdálkodási agrármérnök)
Pályázati támogatás:	TKP2021-NKTA-32 Egyéb
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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001-es BibID:	BIBFORM122364
035-os BibID:	(Scopus)85197174050 (WoS)001254975000001
Első szerző:	Zagyi Péter (agrármérnök)
Cím:	Effect of Split Basal Fertilisation and Top-Dressing on Relative Chlorophyll Content and Yield of Maize Hybrids / Péter Zagyi, Éva Horváth, Gyula Vasvári, Károly Simon, Adrienn Széles
Dátum:	2024
ISSN:	2077-0472
Megjegyzések:	The aim of this study was to determine the nitrogen requirement of maize, the optimal timing and amount of nutrient application, based on long time series data. An additional objective was to examine the response of the relative chlorophyll content of maize to nitrogen fertilisation. The examinations were carried out in a long-term field experiment at the University of Debrecen between 2016 and 2022, using two maize hybrids with different genotypes. Spatial and temporal changes in the N status of maize leaves were monitored using the Soil and Plant Analysis Development (SPAD) instrument. In addition to the non-fertilised (A0 ) treatment, six fertiliser treatments were applied (spring basal fertilisation: 60 and 120 kg N ha?1 , A60; A120). Basal fertilisation was followed by two occasions of top-dressing at phenological stages V6 and V12, at rates of +30-30 kg N ha?1 (V690 and V6150, and V12120 and V12180). The CMR (Chlorophyll Meter Reading), averaged over the examined years, genotypes and fertiliser treatments, were lowest in the V6 phenological phase (40.23 ± 5.57, p < 0.05) and highest in R1 (49.91 ± 8.41, p < 0.05). A120 fertiliser treatment increased the relative chlorophyll content by 5.11 compared to the non-fertilised treatment, 1.67 more than A60 treatment. The basal fertilisation treatment substantially increased the yield (A60: +30.75%; A120: +66.68%) compared to the A0 treatment averaged over years and genotypes. Based on the obtained research results, a basal treatment of 120 kg N ha?1 is recommended and it can be concluded that, under appropriate water supply conditions (rainfall, irrigation), nitrogen top-dressing applied in V6 phenophase results in a significant yield increase compared to basal fertilisation.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Chlorophyll Meter Reading (CMR) crop change hybrid maize nitrogen fertiliser
Megjelenés:	Agriculture-Basel. - 14 : 6 (2024), p. 1-16. -
További szerzők:	Horváth Éva (1993-) (környezetgazdálkodási agrármérnök) Vasvári Gyula (1981-) (Ph.D hallgató) Simon Károly (1985-) (okleveles agrármérnök) Széles Adrienn (1980-) (okleveles agrármérnök)
Pályázati támogatás:	TKP2021-NKTA-32 Egyéb BO/00068/23/4 Egyéb
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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