Kernelweight per Spike in Two-Rowed Barley (Hordeum Vulgare L.) Lines Depending on Nitrogen Fertilization
Masa zrna po klasu linija dvoredog ječma (HordeumVulgare l. ) u zavisnosti od đubrenja azotom
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Author
Madic, Milomirka
Djurovic, Dragan
Jelic, Miodrag
Knezevic, Desimir
Paunovic, Aleksandar
Keywords
winter barleykernel weight
line
nitrogen
ozimi ječam
masa zrna
klas
azot
Metadata
Show full item recordAbstract
Kernel weight per spike in two-rowed barley is the main determinant of
grain yield. Variability of kernel weight spike-1 was studied in three barley genotypes:
G-3033, G-3021 and G-3070, grown over two years under four mineral nitrogen
fertilization treatments, 0, 20, 40 and 60 kg N ha-1. The experiment was set up as a
randomized block design in three replications. Kernel weight per spike significantly
differed across the lines in both years regardless of N application rate. Increased
nitrogen rates led to an increase in kernel weight per spike up to 40 kg N ha-1 in the first
year, whereas the highest values for kernel weight per spike in the second year were
obtained at 60 kg ha-1 N. The proportion of total phenotypic variability for kernel
weight per spike was largely attributed to mineral nitrogen fertilization, considerably
less to line and negligibly to the line x nitrogen interaction, suggesting that the value of
the trait is significantly dependent on the cultural operations used. Masa zrna po klasu kod dvoredog ječma je komponenta prinosa koja u
najvećoj meri određuje prinos zrna. U dvogodišnjem periodu analizirana je varijabilnost
mase zrna po klasu kod tri linije ozimog dvoredog ječma: G-3033, G-3021 i G-3070, pri
četiri nivoa ishrane mineralnim azotom: 0, 20, 40 and 60 kg N ha-1. Masa zrna po klasu
se značajno razlikovala kod linija u obe godine nezavisno od nivoa primenjenog N.
Povećane doze azota delovale su na povećanje mase zrna po klasu do nivoa 40 kg ha-1
N , dok je u drugoj godini najveća masa zrna po klasu zabeležena na tretmanu 60 kg ha-1
N. U ukupnoj fenotipskoj variajbilnosti za masu zrna po klasu najveći udeo pripadao je
mineralnoj ishrani azotom, znatno manji liniji i neznatan interakciji linija x azot, što
ukazuje da vrednost ove osobine u najvećoj meri zavisi od primenjene agrotehnike.