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Čeh, Barbara; Hrastar, Robert; Tajnšek, Anton; Košir, Iztok
Acta agriculturae Slovenica, 06/2008, Volume: 91, Issue: 1Journal Article
At the experimental field of Slovenian Institute of Hop Research and Brewing at Žalec an experiment was conducted in 2006/07 to detect the impact of fertilization by K2SO4 and gypsum on the yield, oil content, oil yield, protein content, protein yield and fatty acids composition at two different cultivars of oilseed rape (cultivar Smart and hybrid Toccata). In the conditions of the experiment the source of sulphur did not impact the yield, but a negative impact of spring fertilization by sulphur at cultivar Smart was detected. At hybrid Toccata positive impact of gypsum was detected when it was fertilized at sowing. Oil content was higher at cultivar Smart by 3.32% compared to hybrid Toccata. At cultivar Smart no source of sulphur impacted significantly the yield of oil, while at the conditions of the experiment positive impact of spring applications of sulphur on the yield of oil was detected at hybrid Toccata. Oil yield was higher at cultivar Smart compared to hybrid Toccata. Protein content was not impacted by sulphur fertilization. The share of linoleic acid was higher at hybrid Toccata by 2.2% to 2.4%, the share of oleic acid was higher at cultivar Smart by 2.2% to 3.1%, the shares of other investigated acids did not differ a lot between Smart and Toccata. Na poskusnem polju Inštituta za hmeljarstvo in pivovarstvo Slovenije v Žalcu smo v sezoni 2006/07 zastavili poskus, v katerem smo preizkusili vpliv gnojenja s K2SO4 in sadro na pridelek, vsebnost olja, pridelek olja, vsebnost beljakovin, pridelek beljakovin in sestavo maščobnih kislin dveh kultivarjev (kultivar Smart in hibrid Toccata) oljne ogrščice. V danih razmerah različne oblike gnojenja z žveplom niso imele značilnega vpliva na pridelek, vendar se pri kultivarju Smart nakazuje negativen učinek spomladanskega gnojenja z gnojili, ki vsebujejo žveplo, pri hibridu Toccata pa pozitiven učinek gnojenja s sadro, če je bila pognojena ob setvi. Vsebnost olja je bila pri kultivarju Smart za 3,32% višja kot pri hibridu Toccata. Pri kultivarju Smart nobena oblika gnojenja z žveplom ni pomembno vplivala na hektarski pridelek olja, pri hibridu Toccata pa se v danih razmerah nakazuje pozitiven učinek spomladanskega gnojenja z žveplom na pridelek olja. Hektarski pridelek olja je pomembno večji pri kultivarju Smart kot pri hibridu Toccata. Na vsebnost beljakovin gnojenje z žveplom ni imelo vpliva. Delež linolne kisline v olju je bil pri hibridu Toccata višji za 2,2% do 2,4%, delež oleinske kisline je bil višji pri kultivarju Smart za 2,2 do 3,1%, deleži drugih maščobnih kislin se pri obeh kultivarjih medsebojno le malo razlikujejo.
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