Effects of Crop Density on Root Yield and Quality of Sugar Beet Cultivars Grown on the Soil Infested and Uninfested by Rhizomania
Uticaj gustine useva na prinos i kvalitet korena sorata secerne repe gajenih na zarazenom i nezarazenom zemljistu rizomanijom
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Author
Nenadic, Nedeljko
Skrbic, Katica
Zivanovic, Ljubisa
Keywords
sugar beetcultivar
rhizomania
crop density
root yield
sugar content
crystal sugar yield
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Show full item recordAbstract
During a two-year period (1996-1997) we conducted studies on
the effects of crop density on root yield and quality of sugar beet cultivars, susceptible
and tolerant to rhizomania, grown on the soil infested and uninfested by
this pathogen. The results obtained are of importance for both agricultural science
and practice. The highest difference in sugar beet studied characteristics was
achieved between infested and uninfested soil, between tolerant and susceptible
cultivars, and the lowest between crop densities.
On the soil infested by rhizomania, on average, root yield was lower by
22.84 tlha, sugar content by 2.49%, crystal sugar yield by 4.64 tlha per cultivar
and crop density.
Tolerant cultivar KWS rama produced higher root and sugar yields on
both infested and uninfested soil. However, susceptible cultivars Al omona and
Delta, grown on un infested soil, had higher sugar content in sugar beet root by
0.53%.
Increased crop density resulted in higher root and sugar yields, however,
considerably higher in the tolerant cultivar and on soil infested by rhizomama. U dvogodisnjem periodu (1996-1997) vrsena su istrazivanja uticaja
gustine useva na prinos i kvalitet korena sorata secerne repe, osetljivih i tolerantnih
na rizomaniju, gajenih na zemljistu zarazenom i nezarazenom
rizomanijom. Ogledi su izvedeni u Sremskoj Mitrovici na zemljistu tipa karbonatni
cernozem.
U ovim istrazivanjima su proucavana tri faktora i to: (A) sorta (AI
omona i Delta - osetljive na rizomaniju i KWS rama tolerantna na ovu
bolest); (B) zemljiste (zarazeno i nezarazeno rizomanijom) i (C) gustina
useva (60, 80 i 100 hiljada biljaka po hektaru).
U istrazivanjima su postignuti sledeci vazniji rezultati:
Najveci uticaj na prinos korena, sadrzaj secera i prinos kristalnog
secera ispoljilo je zernljiste, odnosno prisustvo u njemu patogena rizomanije.
Na ovakvom zemljistu prinos korena, osetljivih sorata (AI omona i
Delta), bio je manji za 30,94 t/ha; sadrzaj secera u korenu za 3,31% a prinos
kristalnog secera za 6D7 t/ha.
Tolerantna sorta KWS rama postigla je veci prinos korena i secera
kako na zarazenom tako i nezarazenom zemljistu. Medutim, osetljive sorte
Al omona i Delta imale su za 0,53% veci sadrzaj secera u korenu repe
gajene na nezarazenom zernljistu.
Sa povecanjem gustine useva povecan je prinos i korena i secera, ali
znatno vise kod tolerantne sorte kao i na zemljistu zarazenom rizomanijom.