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001-es BibID:	BIBFORM095642
035-os BibID:	(cikkazonosító)107052 (Scopus)85109465389 (WOS)000681283100004
Első szerző:	Elbeltagi, Ahmed
Cím:	Applications of Gaussian process regression for predicting blue water footprint: Case study in Ad Daqahliyah, Egypt / Ahmed Elbeltagi, Nasrin Azad, Arfan Arshad, Safwan Mohammed, Ali Mokhtar, Chaitanya Pande, Hadi Ramezani Etedali, Shakeel Ahmad Bhat, Abu Reza Md. Towfiqul Islam, Jinsong Deng
Dátum:	2021
ISSN:	0378-3774
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Agricultural Water Management. - 255 (2021), p. 1-15. -
További szerzők:	Azad, Nasrin Arshad, Arfan Mohammed Safwan (1985-) (agrármérnök) Mokhtar, Ali Pande, Chaitanya Etedali, Hadi Ramezani Bhat, Shakeel Ahmad Islam, Abu Reza Md. Towfiqul Deng, Jinsong
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001-es BibID:	BIBFORM037453
Első szerző:	Széles Adrienn (okleveles agrármérnök)
Cím:	Irrigation and nitrogen effects on the leaf chlorophyll content and grain yield of maize in different crop years / Ványiné Széles Adrienn, Megyes Attila, Nagy János
Dátum:	2012
ISSN:	0378-3774
Megjegyzések:	For economic as well as environmental reasons, the determination of optimal nitrogen (N) fertiliser application rates under field conditions is of great importance, especially under irrigated conditions. A two-year field experiment was conducted in Hungary (47o33' N, 21o26' E, 111 m) with six N fertiliser rates (0?150 kg ha-1) under irrigated and non-irrigated conditions with the aim to compare the chlorophyll (Chl) concentration of maize (Zea mays L.) leaves at different growth stages to the soil nitrate-N, the amount of N applied as fertilizer and grain yield. The effect of irrigation and N fertilisation on the soil water and nitrate-N dynamics, grain yield and water use efficiency (WUE) was also examined. In the drought year of 2007, the volumetric soil water content increased from the surface (8.5?9.5 v/v%) to a depth of 1.2 m (15?20 v/v%) in both water treatments. In the extremely wet year of 2008, an opposite tendency was observed. In 2007, N applied without irrigation accumulated in the 0?0.2 m depth and nitrate-N did not significantly decrease, due to minimal crop N uptake. Under irrigated conditions, nitrate-N was significantly reduced by crop uptake during the growing season of both years. In 2007, chlorophyll meter readings were related to the plant available N at the R1 stage in both water treatments (P<0.001). The CMR value and yield were in close correlation with each other at the R1 growth phase in the drought year in the irrigated treatment (P<0.001; R=0.724), and in the wet year both in the non-irrigated (P<0.001; R=0.735) and the irrigated treatments (P<0.001; R=0.782). The soil nitrate content could be concluded to in the dry year (2007) at the R1 growth stage in both irrigation treatments (R=0.614; R=0.648), and in the wet year (2008) in the non-irrigated treatment at the V12 growth stage (R=0.763).In 2007, the lack of rainfall caused yield stress in the non-irrigated treatment, in contrast to the significantly reduced yield in every N treatment in comparison with the non-irrigated treatment recorded in 2008, due to the extremely high amounts of rainfall. The yield surplus per 1 mm irrigation was negative and the level of WUE was also significantly lower.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban irrigation fertilization soil water content nitrate-N chlorophyll water use efficiency
Megjelenés:	Agricultural Water Management. - 107 (2012), p. 133-144. -
További szerzők:	Megyes Attila (1972-) (agrármérnök) Nagy János (1951-) (agrármérnök, mérnök-tanár)
Pályázati támogatás:	TÁMOP-4.2.2/B-10/1-2010-0024 TÁMOP
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