Összesen 1 találat.


001-es BibID:BIBFORM107782
Első szerző:Széles Adrienn (okleveles agrármérnök)
Cím:Development of the phenology, heat and water use efficiency and grain yield of maize hybrids in a moderately hot, dry production zone / Adrienn Széles, Éva Horváth, Péter Zagyi, Balaout Ibtisem, Károly Simon
Megjegyzések:Knowledge of maize hybrid phenology, hybrid selection and N management are key in terms of adapting to climate change and improving production efficiency. The present study examined the effect of Growing Degree Days (GDD) on the phenology of three maize hybrids (Merida FAO 380, Fornad FAO 420, Armagnac FAO 490). and also how the amount of nitrogen applied and its application time affected stomatal conductance (Gs), heat and water use efficiency (HUE,WUE) and productivity of the maize hybrids. Besides the non-fertilizer treatment, the 60 and 120 kg N ha-1 applied as basal fertilizer were followed by two instances of top-dressings at V6 and V12 phenophases with amounts of +30 and +30 kg N ha-1, respectively. Gs measurements took place during the V6,V12,VT,R1 and R6 phenological phases. Due to the unfavourable environmental factors, hybrids accumulated only 40-50% of the amount of GDD required for germination (34-53oC). GDD accumulation was higher in the reproductive stage than in the vegetative stage, which showed differences by hybrid. No verified differences were observed in GDD of early and medium-maturity hybrids. The water deficit between phenophases V6-R1 was not accompanied with high temperature, thus transpiration was not reduced and stomata of hybrids were not closed. After silking, Gs was greatly reduced for the R6 stage in all three hybrids (p<0.05). The most favourable fertilization strategy was A60 for the early hybrids and A120 for the medium-maturity hybrids. This is achieved when the average Gs value is around 390 mmol m-2 s-1 and is highest during the R1 phenophase. It was confirmed that optimal nutrient supply contributes to the increase in HUE and WUE values. The early hybrid was utilized heat more efficiently than medium-maturity hybrids. It increased its biological activity, as confirmed by higher yields at all nutrient levels, but no reliable difference was detected compared to medium-maturity hybrids.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok előadáskivonat
growing degree days
heat use efficiency
nitrogen fertilizer
stomatal conductance
water use efficiency
Megjelenés:International Congress on Sustainable Development in the Human Environment- Current & Future Challenges ICSDEC 2022 : Proceedings book / eds. Anna Krakowiak-Bal, Atilgan Atilgan, Roman Rolbiecki, Hakan Aktas. - p. 253. -
További szerzők:Horváth Éva (1993-) (környezetgazdálkodási agrármérnök) Zagyi Péter (1986-) (agrármérnök) Ibtisem, Balaout (1993-) (agrármérnök) Simon Károly (1985-) (okleveles agrármérnök)
Internet cím:Szerző által megadott URL
Intézményi repozitóriumban (DEA) tárolt változat
Rekordok letöltése1