Evaluation phenology, yield and quality of maize genotypes in drought stress and non-stress environments
Laen...
Kuupäev
2021
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The aim of the study is to examine the effect of agrometeorological indices (growing
degree days, GDD; heliothermal unit, HTU; photothermal unit, PTU; hydrothermal unit, HYTU)
on the phenology and yield (GY) of the Sushi (FAO 340) and Fornad (FAO 420) maize hybrids.
Furthermore, it was also analysed how the amount of nitrogen and its application time affected
the productivity and protein content (GP) of maize under drought stress (DS) and non-stress (NS)
conditions. There were seven fertilizer treatments in the scope of the field experiment.
Non-fertilized treatment (A0) spring basic treatment with 60 and 120 N ha-1
(A60, A120), and
following the basic treatments, 30 kg N ha-1
top-dressing was applied in the V6 (V690, V6150)
phenophase and then another 30 kg N ha-1
in the V12 (V12120, V12180) phenophase. Based on the
GDD and PTU, length of the vegetation period of maize hybrids can be predicted. Under DS, the
largest GY and GP was recorded in the same treatment for Sushi (V6150 kg N ha−1
), and at
different nutrient levels under NS: GY (A120) and GP (V6150). The highest GY of Fornad hybrid
under DS was achieved with the A120 treatment while the highest GP with the V6150; in the case
of NS V6150 kg N ha−1 was the most effective for both GY and GP. The + 30 kg ha-1 N fertilizer
applied in the V12 phenophase did not improve GY and GP in either hybrid during the two
growing seasons. The findings provide useful help for farmers to prepare for future environmental
changes and to operate successfully.
Kirjeldus
Received: December 10th, 2020 ; Accepted: March 27th, 2021 ; Published: May 13th, 2021 ; Correspondence: szelesa@agr.unideb.hu
Märksõnad
agrometeorological indices, phenology, nitrogen fertilization, grain yield, grain protein content, articles