Zorica Jurković

Agricultural Institute Osijek

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Rezica Sudar

Agricultural Institute Osijek

Georg Drezner

Agricultural Institute Osijek

Daniela Horvat

Agricultural Institute Osijek

Krunoslav Dugalić

Agricultural Institute Osijek

Marija Viljevac Vuletić

Agricultural Institute Osijek

GŠ

Gordana Šimić

Agricultural Institute Osijek

Vlatka Jurković

Croatian Personal Data Protection Agency

Marija Vratarić

Agricultural Institute Osijek

Ines Mihaljević

Agricultural Institute Osijek

Aleksandra Sudarić

Agricultural Institute Osijek

Cooperative Institutions

University of Osijek

Agricultural Institute Osijek

University of Zagreb

University of Novi Sad

Institute of Food Science and Technology

Croatian Veterinary Institute

Scientific Veterinary Institute "Novi Sad"

University of Belgrade

University of Tuzla

Pokrajinski Sekretarijat za Nauku i Tehnološki Razvoj

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Status and perspectives of sunflower growing in Croatia

Miroslav Krizmanić Zorica Jurković Josip Kovačević Anto Mijić

In general, agroecological conditions for sunflower growing in Croatia is favorable for sunflower growing, especially in the Eastern Croatia. However, high variation of sunflower harvested area and yields among years were found. For example, in the period of 1980-1989, sunflower harvested area ranged from 7,006 ha to 29,076 ha and grain yields from 1,85 to 2,65 t/ha. Attac of Diaporthe/Phomopsis helianthy was main reason for decreases of yields and sunflower sowing area, especially at the beginning of 1980ies. However, by creating of tolerant hybrids, this problem is recently minimazed. Also, weather conditions during growing season are important factor of sunflower yields and their quality. Sunflower growing in Croatia is situated mainly in the Eastern Croatia, especially in the Vukovarsko-srijemska and Osjecko-baranjska counties (near 80% of total sunflower harvested area). Grain yields of sunflower are in close connection with rainfall quantity and their distribution (Krizmanic et al. 1988). In general, low yields are in connection with rainfall excess at maturity stage (the higher incidences of lodging and Botrytis cinerea, Sclerotinia sclerotiorum and other patogens). However, by growing of more tolerant sunflower hybrids (for example new sunflower hybrids of Osijek Agricultural Institute:Fakir, Orion, Olio, Podravac and Sunce) it is possible to stabilize sunflower yields among years. Also, these hybrids are high-yielding (yield capacity between 4.5 and 5.0 t/ha) and of high oil contents (between 45 and 50%) under normal environmental conditions. As sunflower is attaced by about 25 different patogens, application of crop protection measures at early growth stages is needed. Under our environmental conditions it is needed one or two fungicide applications. Sunflower is a perspective crop in Croatia with aspect of our need both for oil in human diet and for using of by-products in cattle nutrition (for example, chrushed seed or cake). These needs is possible to cover by growing about 45,000 ha or three fold more than actual status of sunflower growing area. Also, improvement of crop rotation on our arable land is possible by increase of sunflower growing.

Growing season

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Characterization of winter barley genotypes in croatian environment

Cereal Research Communications (2008)

Josip Kovačević Alojzije Lalić Zorica Jurković

Cambisol

Growing season

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Health and aesthetic aspects of drinking waters

Sandra Bašić Mirna Habuda-Stanić Zorica Jurković Sanja Miloš Jelena Đugum

Voda za pice neophodna je za život na Zemlji. Prirodni resursi ciste i pitke vode su ograniceni. Prema podacima Svjetske zdravstvene organizacije (WHO) samo je 0, 007% slatkovodne vode na Zemlji dostupno za ljudsku upotrebu. Osim ogranicenih izvora pitke vode veliki je problem i njihovo zagađenje koje nastaje uslijed intenzivne industrijalizacije, povecanja broja stanovnika na Zemlji i intenzivne poljoprivredne proizvodnje. Osnovni izvori vode za pice su podzemne i povrsinske vode koje mogu sadržavati razlicite nepoželjne patogene mikroorganizme i kemijske polutante, te se isti obradom vode nastoje smanjiti na prihvatljivu razinu ili ukloniti. Zdravstveni i estetski aspekti vode za pice podrazumijevaju utjecaj kolicine i vrste u vodi prisutnog kemijskog elementa, odnosno njihovih spojeva, na zdravlje ljudi, odnosno utjecaj na organolepticka svojstva vode za pice. Danas svaka država pravilnicima, smjernicama ili preporukama propisuje kontrolne analiticke parametre, kao i njihove maksimalno dozvoljene koncentracije (MDK) u vodi za pice. Ovaj rad ce dati pregled najcesce zdravstvene i estetske problematike vode za pice sa naglaskom na hidricne bolesti koje, unatoc težnjama i danas u pojedinim dijelovima svijeta odnose ljudske živote.

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Composition and correlation among the fatty acids in sunflower seed oil of various inbred lines

Sjemenarstvo (1996)

Vladimir Jukić Zorica Jurković Rezica Sudar Miroslav Krizmanić Marijan Bilandžić

For determination of the composition of fatty acids of sunflower seed oil were used 44 male-fertile sunflower lines in various degrees of inbreeding, being the creations of the Osijek Agricultural Institute. Fatty acids were determined by Perkin-Elmer gas chromatography and the method of internal normalization of surfaces. The obtained data were used to calculate the aritmetic means, values of dispersion, coefficients of linear correlation and coefficient of determination. The objective of this research was to demonstrate the form of interactions among the ratios i.e., correlation of the oleic, palmitic stearic and linoleic acids. The correlation intensity was determined according to the Roemer-Orphal classification. Linear regressions showed negative and mean correlation between the palmitic and oleic acid (r=-0.43). The correlation between the oleic and linoleic acid was negative and complete (r=-0.97). The positive and weak correlation was established between the stearic and oleic acid (r=0.30). According to the coefficient of determination (R2=0.99) only 1% of the sum of the total deviations remained undefined by the correlation of the variables tested.

Stearic acid

Sunflower oil

Linear correlation

Positive correlation

Negative correlation

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THE IMPORTANCE OF HIGH-MOLECULAR-WEIGHT GLUTENIN SUBUNITS FOR WHEAT QUALITY EVALUATION

DOAJ (DOAJ: Directory of Open Access Journals) (2006)

Daniela Horvat Georg Drezner Zorica Jurković Gordana Šimić Damir Magdić

High-molecular-weight glutenin subunits (HMW-GS) composition was analyzed by sodium-dodecyl-sulfat-polyacrilamid-gel electrophoresis (SDS-PAGE), while the quantitative determination of total HMW-GS was obtained by reversed phase- high performance liquid chromatography (RP-HPLC). Considering HMW-GS composition, the most frequent subunits at Glu-A1 locus were N, at Glu-B1 locus 7+9 and at Glu-D1 locus 2+12. The cultivars with the GS 5+10 at Glu-D1 locus have shown better technological characteristics in contrast to cultivars with the GS 2+12. The cultivars Žitarka, Srpanjka, Barbara, Klara and Golubica in spite of presence HMW-GS 2+12 have shown very good and good technological properties because they had optimal proportions (>10%) of total HMW-GS. The results of the linear correlation analysis between quality parameters and HMW-GS composition have shown significant (P<0.05) positive influence of HMW-GS (Glu-1 score) on sedimentation value (r=0.55), Gluten Index (r=0.72), dough energy (r=0.61), maximum resistance (r=0.64) and resistance to extensibility ratio (r=0.58). The influence of HMW GS proportions on technological parameters, compared to HMW-GS composition, was more pronounced on protein content (r=0.82), dough development time (r=0.70), degree of softening (r=-0.90), dough energy (r=0.74) and loaf volume (r=0.65).

Glutenin

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Quality parameter changes in wheat varieties during storage at four different storage conditions

Ivica Strelec Daliborka Koceva Komlenić Vlatka Jurković Zorica Jurković Žaneta Ugarčić-Hardi

Summary Changes in seed quality parameter of three wheat varieties during one year storage at four diff erent storage conditions, were studied. Applied storage conditions adversely aff ected quality changes in wheat seeds during one year storage. Th e most pronounced changes were observed for seeds kept at 40°C, RH = 45%, followed by seeds stored at 25°C, RH = 45%, while seeds kept at 4°C, RH = 45% or at warehouse conditions mostly showed minimal or statistically insignifi cant changes. Elevated temperature of seed storage caused a signifi cant decrease of starch content, hectolitre weight, and wet gluten content, accompanied with increase in fl our acidity, and fl uctuating in Zeleny sedimentation value. Th e intensities of observed changes showed strong dependence on wheat variety.

Falling Number

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Apple Cultivars Suitable for Ecological Cultivation

Bogdan Cvjetković Krunoslav Dugalić Josip Špoljarić Zorica Jurković

U organizaciji ekoloske proizvodnje jedan je od prvih koraka je sadnja kultivara jabuka otpornih na ekonomski najvažnije bolesti. Clanak 21. u poglavlju III Agrotehnicke mjere, Pravilnika o ekoloskoj proizvodnji u uzgoju bilja i u proizvodnji biljnih proizvoda /NN 91/01/ ima takav pristup:Ekoloska proizvodnja u uzgoju bilja i biljnih proizvoda u izboru bilja i sorata koristi vrste i sorte prilagođene lokalnim pedoklimatskim uvjetima, otporne na stetocinje. Uzgoj relativno otpornih kultivara jedna je od osnovnih mjera ne samo ekoloske vec i integrirane proizvodnje. U nas na jabuci parazitira nekoliko važnih uzrocnika bolesti (Venturia inaequalis, Podosphaera leucotricha), a u posljednje vrijeme i Erwinia amylovora. Upravo zbog pojave tih bolesti kod neotpornih kultivara neophodne su intervencije sredstvima za zastitu bilja. Kako bi ocijenili osjetljivost pojedinih kultivara na uzrocnike ucestalijih bolesti, a istovremeno dobili sliku o njihovim gospodarskim karakteristikama u Osijeku je posađen sortni pokusni nasad s 27 kultivara. Pokusni nasad je podignut po principu slucajnog Blok rasporeda u 3 ponavljanja po 4 stabla, tako da je svaki kultivar zastupljen s 12 stabala. Nakon prvih godina promatranja, 17 perspektivnijih kultivara (Arkanzas, Belgolden, Cooper 7A, Cooper 7SB2, Enterprise, Gold Chief, Gold Rush ; Liberty, Lysgolden, N. Easygro, Priam, Premiera, Red Top, Rewena, Sirprize, Smoothee, Spartan) uzeto je u daljnja pracenja i komparirana s kultivarom Golden Delicious/klon B koji je uzet kao standard. U uvjetima prirodne infekcije ocjenjivana je zaraza s V. inaequalis, a u vjetima umjetne infekcije na bakteriju E. amylovora. Kultivari su pokazali razlicitu osjetljivost. Međutim, i drugi parametri kao sto su pomoloska, fenoloska i morfoloska istraživanja na nekim istraživanim kultivarima ukazala su nedostatke. Na osnovu tih istraživanja pokazalo se da neki kultivari nisu za preporuku u pedoklimatskim uvjetima istocne Slavonije. Prihvatljivost pojedinog kultivara od potrosaca također je cimbenik o kojem treba voditi racuna prilikom introdukcije pojedine sorte. Provedena organolepticka ocjenjivanja pokazala su ujednacenost ocjena pojedinih kultivara sa standardom. Na kraju ovih istraživanja samo cetiri kultivara relativno otporna na krastavost plodova (V. inequalis) konkuriraju kvalitetom i izgledom do sada vodecim kultivarima. To su: Cooper 7SB2, Enterprise, Rewena i Smoothee.

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Sastav triacilglicerola ulja iz različitih OS kultivara soje

Rezica Sudar Marija Vratarić Zorica Jurković Aleksandra Sudarić

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Interaction of irrigation and nitrogen fertilization on photosynthetic efficiency of maize leaves

Vlatka Jurković Marko Josipović Zorica Jurković Goran Krizmanić Domagoj Šimić

Cilj ovog istraživanja je bio ispitati utjecaj tretmana navodnjavanja i gnojidbe dusikom na fotosintetsku ucinkovitost listova kukuruza hibrida OSSK 552 (A1 – bez navodnjavanja, A2 – navodnjavanje, B1 – bez gnojidbe dusikom, B2 – gnojidba dusikom). Poljski pokus je postavljen na pokusalistu Poljoprivrednog instituta Osijek. Parametri JIP-testa su pokazali statisticki znacajnu razliku između tretmana. Maksimalni kvantni prinos fotosustava II (FV/FM) je bio povecan u svim tretmanima u odnosu na kontrolu, dok je indeks fotosintetske ucinkovitosti (PIABS) imao vise vrijednosti u tretmanu navodnjavanja i gnojidbe dusikom. Rezultati su pokazali pozitivan utjecaj kombinacije navodnjavanja i gnojidbe dusikom na fotosintetsku ucinkovitost listova kukuruza.

Nitrogen fertilizer

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Antioksidacijski sustav u listovima jabuke u ekološkom i integriranom sustavu zaštite

Marija Viljevac Vuletić Vesna Tomaš Ines Mihaljević Zorica Jurković Krunoslav Dugalić

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