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
Pregled/ Otvaranje
Autor
Madic, Milomirka
Djurovic, Dragan
Jelic, Miodrag
Knezevic, Desimir
Paunovic, Aleksandar
Ključne reči
winter barleykernel weight
line
nitrogen
ozimi ječam
masa zrna
klas
azot
Metadata
Prikaz svih podataka o dokumentuApstrakt
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.