@article{
author = "Dragičević, Vesna and Mladenović Drinić, Snežana and Simic, Milena and Brankov, Milan and Kresović, Branka and Vukadinovic, Jelena and Milenković, Milena",
year = "2020",
abstract = "Nitrogen is an important macro-nutrient that influences various physiological processes in
plants. Nevertheless, nitrogen could be loosed from the soil by leaching and evaporation. Thus,
low nitrogen inputs are required together with a strategy to improve its utilization by crops.
Maize genotypes exhibit various susceptibility to low soil nitrogen. From that reason, variability
in the reaction of 32 maize lines to growing in conditions with optimal (fertilization with urea),
and with low nitrogen (without fertilization) was examined during 2017 and 2018. All other
growing measures and fertilization with other elements was applied in the same manner on the
whole experimental plot. 2017 was a drier season, with higher average temperatures, particularly
during anthesis and grain filling period.
High variability among genotypes and seasons was present. The values of maize grain yield
and 1000 grain weight were slightly higher in treatment with nitrogen application. Some lines
under the low nitrogen conditions reached even higher grain yields (efficacy of yielding was
139.7% and 156.7%, for 2017 and 2018) than in conditions with optimal nitrogen in the soil, such
as L1, L2, L5, L10, L11, L13, L15, L23 and L31, declaring them as genotypes with high nitrogen
using efficiency. However, these lines achieved moderate yields (in both treatments and years) in
regard to other lines. Among tested lines, L1 and L23 had higher grain yields in both fertilization
treatments indicating them as prominent for further research, i.e. breeding of maize hybrids with
better nitrogen usage from the soil, even in the conditions with low nitrogen., Azot je važan makro-element koji je uključen u brojne fiziološke procese kod biljaka. Međutim,
gubici azota iz zemljišta putem ispiranja i evaporacijom mogu biti veliki, tako da su preporučljivi
niži unosi u kombinaciji sa strategijama koje poboljšavaju njegovo usvajanje. Genotipovi
kukuruza različito reaguju na nizak nivo azota u zemljištu. Stoga je ispitana varijabilnost u reakciji
32 linije kukuruza na gajenje u uslovima optimalne obezbeđenosti (đubrenje ureom) i niskog
nivoa azota (bez đubrenja), tokom 2017. i 2018. godine. Sve ostale mere gajenja i đubrenja sa
drugim elementima su primenjene na isti način na celoj eksperimentalnoj površini. 2017. godina
je bila sa manje padavina, sa većim prosečnim dnevnim temperaturama, posebno tokom perioda
cvetanja i nalivanja zrna kukuruza.
Bila je prisutna visoka varijabilnost između ispitivanih genotipova i sezona. Vrednosti prinosa
i mase 1000 zrna su bile nešto niže na delu ogleda bez đubrenja azotom. Na istom delu ogleda
su neke linije (L1, L2, L5, L10, L11, L13, L15, L23 i L31) imale čak veći prinos, u odnosu na deo
ogleda sa optimalnim nivoom azota u zemljištu (efikasnost prinosa je bila 139.7% i 156.7%, za
2017. i 2018.), karakterišući ih stoga kao vrlo efikasne u smislu iskorišćenja azota. Međutim,
navedene linije su ostvarile nešto niže vrednosti prinosa zrna (u oba tretmana i u obe godine)
u odnosu na ostale linije. Od svih ispitivanih, L1 i L23 su imale relativno veće prinose u oba
tretmana, što ukazuje da bi mogle biti pogodne za dalja istraživanja, tj. u oplemenjivanju hibrida
sa boljom efikasnošću iskorišćenja azota čak i u uslovima njegovog niskog sadržaja u zemljištu",
publisher = "Beograd : Društvo selekcionera i semenara Republike Srbije",
journal = "Selekcija i semenarstvo",
title = "Variability of maize lines in ability to use nitrogen, Varijabilnost linija kukuruza za iskorišćavanje azota",
volume = "26",
number = "1",
pages = "19-28",
doi = "10.5937/SelSem2001019D"
}
