Vladimir Sikora

Vladimir Sikora
Institute of Field and Vegetable Crops · Alternative crops

PhD

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106
Publications
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Publications

Publications (106)
Chapter
The emergence of alternative uses of hemp in addition to the traditional ones, the revitalization of hemp cultivation and processing, and the positive economic effects thereof have imposed the need for multidisciplinary knowledge to be created, absorbed, acquired, and disseminated. This chapter is aimed at providing an overview of the knowledge dev...
Article
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Allelopathic effects of different plant allelochemicals have become the focus of studies that aim to determine new pesticidal compounds. Plant extracts with different chemical compositions can be obtained using different methods of extraction, whereas studies dealing with allelopathic properties use biotests to obtain fast and precise results. Such...
Article
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Nepeta cataria, also known as catnip or catmint, is the most widespread and intensively studied species. The name catmint is derived from the strong attraction most cats have towards this species. Because of this, it is often used in pet toy industry as a safe attractant for cats. The main compounds responsible for this reaction in cats are nepetal...
Article
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This paper is a study of the chemical composition of Hyssopus officinalis ssp. officinalis grown during three years (2017–2019) at the Institute of Field and Vegetable Crops Novi Sad (Vojvodina Province, Serbia). Furthermore, comparisons with ISO standards during the years were also investigated, as well as a prediction model of retention indices o...
Article
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Marrubium vulgare is a cosmopolitan medicinal plant from the Lamiaceae family, which produces structurally highly diverse groups of secondary metabolites. A total of 160 compounds were determined in the volatiles from Serbia during two investigated years (2019 and 2020). The main components were E-caryophyllene, followed by germacrene D, α-humulene...
Article
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Ogled sa navodnjavanjem kukuruza izveden je 2019. godine na oglednom polju Instituta za ratarstvo i povrtarstvo iz Novog Sada u Odeljenju za alternativne biljne kulture u Bačkom Petrovcu(N 45°19`, E 19°50`), na zemljištu tipa karbonatni černozem lesne terase. U istraživanjima je korišćen hibrid NS 3023 (FAO 390).Navodnjavanje je obavljeno sistemom...
Article
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Ogled sa navodnjavanjem kukuruza izveden je 2019. godine na oglednom polju Instituta za ratarstvo i povrtarstvo iz Novog Sada u Odeljenju za alternativne biljne kulture u Bačkom Petrovcu(N 45°19`, E 19°50`), na zemljištu tipa karbonatni černozem lesne terase. U istraživanjima je korišćen hibrid NS 3023 (FAO 390).Navodnjavanje je obavljeno sistemom...
Article
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Hydrolates, also referred to as hydrosols, floral or distillate waters, as well as aromatic waters, are produced in the same isolation process with essential oils by steam distillation. A small amount of essential oil constituents is dissolved in hydrolates providing specific organoleptic properties and flavor, as well as biological activity which...
Article
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Hemp (Cannabis sativa L.) is currently one of the most controversial and promising crops. This study compared nine wild hemp (C. sativa spp. spontanea V.) accessions with 13 registered cultivars, eight breeding lines, and one cannabidiol (CBD) hemp strain belonging to C. sativa L. The first three groups had similar main essential oil (EO) constitue...
Article
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The hypothesis of this study was that we can modify the essential oil (EO) profile of hemp (Cannabis sativa L.) and obtain fractions with differential composition and antimicrobial activity. Therefore, the objective was to evaluate the effects of grinding of hemp biomass before EO extraction and fractionation during distillation on EO profile and a...
Article
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Marrubium vulgare is a plant with high bioactive potential. It contains marrubiin, a labdane diterpene that is characteristic for this genus, as well as a complex mixture of phenolic compounds. According to numerous studies, M. vulgare acts as a good antioxidant agent, and due to this, it could potentially be useful in treatments of cancer, diabete...
Poster
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Climatic extremes have demonstrated the sensitivity of agriculture to climate change. Climate changes shifting climate variables: temperature, precipitation, humidity, evaroration, sunlight, wind speed, etc. Climatic change has created challenges for the agricultural sector, adding to pressures on global agricultural and food systems (Popovic et al...
Conference Paper
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Climatic extremes demonstrated that agriculture is sensitive to climate change. Climate changes shifting climate variables: temperature, precipitation, humidity, evaporation, sunlight, wind speed, etc. Climatic change has created challenges for the agricultural sector and added pressure on global agricultural and food systems. On many crops there a...
Article
Sorghum is an important crop that serve multiple purposes as human food, animal feed, and bioenergy production. There are opportunities to produce different types of biofuels from sorghum-based biomass. Sorghum with its vast genetic resources can serve as bioenergy crop and not compete against the value of it as food and nutritional security crop....
Article
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Alternativne kulture sve više interesuju poljoprivredne proizvođače tako da iz godine u godinu nalaze svoje mesto u sistemu biljne proizvodnje. U radu su prikazani rezultati proizvodnje nekih alternativnih kultura u Institutu za ratarstvo i povrtarstvo sa osvrtom na novi sortiment. Ključne reči: sirak za zrno, konoplja, uljani lan, facelija, lekov...
Article
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Hemp (Cannabis sativa L.) was one of the earliest domesticated plant species. Biological classification (taxonomy or systematization) manifests evolutional relationships between taxons according to trait similarities. When it comes to taxonomy, hemp is one of the most controversial plant species due to significant effects of environmental condition...
Article
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Rapeseed is one of the major oil crops, grown in various agroecological conditions. Interest in organic rapeseed is rising, with increasing importance to breeders to determine the need for specific organic breeding programs. The objective of this study was to determine the adaptive value of rapeseed cultivars in organic farming environments. Five w...
Chapter
This chapter provides an overview of sorghum (Sorghum bicolor L.) biomass pretreatment methods to produce biofuels. Sorghum is an important food, feed, and fuel crop that serves multiple purposes of human food, pet food, animal feed, and feedstock for bioenergy production. There are enormous opportunities to produce different types of biofuels from...
Article
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This study aimed to test different chemical agents to obtain microbiologically safe industrial hemp seeds that could be used for further food processing (with the reduced total number of microorganisms, total number of moulds and yeasts, and total number of Enterobacteriaceae). In order to obtain seeds applicable for food consumption, optimal stora...
Article
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Analysis of irrigation scheduling of maize was done by using evaporation from the free water surface (Eo) and correction coefficients (k) and reference evapotranspiration (ETo) and crop coefficients (kc). The field experiment was carried out in 2018 on the Experimental field of the Institute of field and vegetable crops in the Department of alterna...
Article
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The purpose of this study is to compare the yields and yield components of 3 winter small grain cereals (wheat ('NS 40S'), oat ('NS Jadar') and rye ('NS Savo')) grown in conventional and organic production systems. The experiment was conducted as a block design with three replicates at the Bački Petrovac experiment field of the Institute of Field a...
Article
Da bi se uopšte moglo prići realizaciji bilo kakve ideje o intenzivnom korišćenju agroekoloških uslova ili razradi novih postupaka za zalivni režim gajenih biljaka, nemoguće je bilo šta pokušati bez poznavanja pravih vrednosti potreba biljaka za vodom, odnosno potencijalne evapotranspiracije (ETP). Utvrđene vrednosti potreba biljaka za vodom su osn...
Article
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Species of the Lamiaceae family have enjoyed a rich tradition of use for flavoring, food preservation, and medicinal purposes, due to their curative and preventive properties. Cultivated winter savory (Satureja montana L.), sage (Salvia officinalis L.) and hyssop (Hyssopus officinalis L.) are produced for seed, herb, and essential oil. Dominant com...
Conference Paper
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Abstract: Buckwheat – Fagopyrum esculentum Moench is annual, monocarpus plant from the family Polygonaceae, the genus Fagopyrum, from the group of alternative cereals. Its origin is Central Asia. Buckwheat is a highly valued food in human nutrition, especially in countries where emphasis is placed on food that is health - safe. In the diet of human...
Conference Paper
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The genus Santolina (Asteraceae family) is a taxonomically complex group of plant species widely distributed in the Mediterranean region. Santolina chamaecyparissus L., commonly referred to as cotton lavender, is a hardy aromatic evergreen shrub with a dense mound of attractive grayish-silver foliage. It has been widely used in traditional medicine...
Article
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Sorghum is considered as tolerant species toward different environment conditions. Genetic potential for sorghum yield is being exploited depending on the intensity of production and effect of biotic and abiotic environmental factors.
Conference Paper
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Lan je uljarica koja ima veliku primenu u medicini, ishrani ljudi i životinja i drugim granama industrije. Ogled sa sortom lana NS Primus izveden je na parcelama Instituta za ratarstvo i povrtarstvo, u Bačkom Petrovcu, u tri ponavljanja. Sorta NS Primus ostvarila je u proseku visok prinos zrna i ulja. Prosečan sadržaj ulja u zrnu za testirane sorte...
Conference Paper
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The objective of this study was to determine the content of phenolic compounds (total phenolics, total tannins and total flavonoids) and antioxidant capacity by six different assays in industrial hemp (‘Helena’ variety) extracted by four different extraction solvents: 70% methanol, 70% ethanol, 70% acetone and water. Out of the four solvent mixture...
Article
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Moldavian balm or Moldavian dragonhead (Dracocephalum moldavica L.) is native to temperate climate of Asia, but it was naturalized in Eastern and central Europe, North Africa, China and northeastern United States. This plant with its citrus like flavor is extensively used as a spice and for composition of teas, because of neral and geranial as majo...
Article
Full-text available
Alternativne kulture bez obzira na to što se gaje na relativno malim površinama sve više interesuju poljoprivredne proizvođače tako da iz godine u godinu nalaze svoje mesto u sistemu biljne proizvodnje. U radu je dat pregled najnovijih istraživanja iz ove oblasti.
Article
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Dill (Anethum graveolens L.) is a one-year herbaceous, spicy plant, which has aromatic smell and taste. One of its important ingredients is essential oil. The experiment showing the effect of irrigation on essential oil and biomass yield of dill was conducted in rainy 2016 and dry 2017 in two variants: control (without irrigation) and variant with...
Article
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The aim of this study was to assess a set of 40 accessions of Hokkaido type pumpkins (Cucurbita maxima Duchesne) in terms of the traits of agronomic importance and the basic fruit flesh quality parameters, with the emphasis on Serbian environmental conditions. The pumpkins are a part of the larger Cucurbita collection belonging to the Institute of...
Article
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The most critical aspect of plant survival and reproduction is seed germination. Considering the specificity of the Cannabis sativa production, obtaining high-quality hemp seed is not an easy task. Germination testing is often the most reliable way of assessing viability, but the selection of appropriate methods is complex. This study aimed to eval...
Article
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Clary sage (Salvia sclarea L.) is native to Southern Europe and is cultivated worldwide, as ornamental, as well as essential oil bearing plant.Clary sage is well known for its high value essential oil, widely used in perfumery. Besides, the oil possesses high biological activity and because of that is used against stress, tension, depression, insom...
Article
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U cilju unapređenja organske proizvodnje razvojem novih tehnologija, primena bioregulatora, organskih i folijarnih đubriva sve više pronalazi mesto u naučno istraživačkom radu, ali i u praksi. Ogled sa ozimom pšenicom sorte NS-40S izveden je u proizvodnoj 2013/2014. godini na sertifikovanoj površini Odeljenja za alternativne kulture u Bačkom Petrov...
Conference Paper
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The objective of this study was to determine cannabinoids content and fatty acids composition in twelve European fiber hemp varieties from Serbia, Romania, Hungary, Italy, Ukraine, France, Nederland and Poland. The CBD content in analysed varieties ranged from 0.00 to 1.96% and THC content was lower than the legal limit in EU. Total oil content in...
Conference Paper
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Essential oils of two fiber hemp cultivars (Fedora 17 and Helena) were investigated in order to determine their composition and their suitability for utilization as fragrance and aroma additive. The fresh fiber hemp inflorescences were hydrodistilled and obtained essential oils were characterized by GC-MS. In both cultivars, there were 45 compounds...
Article
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Lan je jedna od najstarijih gajenih biljaka sa dugom tradicijom u gajenju i koris c enju. Prema FAO podacima, lan se u svetu sejao na prosec nim povrs inama od 2,65 miliona hektara. Ostvareni prosec ni prinosi u svetu iznosili su 1,01 t ha-1 , a ukupna proizvodnja 2,65 miliona tona. Osnovni cilj u procesu oplemenjivanja lana je povec anje genetskog...
Article
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The aim of this study was to access the overall effects of genotype, environment and genotype × environment interaction (GEI), as well as the importance of individual agro-technological traits in the broomcorn [Sorghum bicolor (L.) Moench] panicle yield formation. The performances of 11 broomcorn cultivars grown in eight different seasons are discu...
Article
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Summary: The experiments showing the effect of drip irrigation on yield and evapotranspiration of fibre hemp (Cannabis sativa L.) were conducted at the experimental field of the Alternative Crops Department, Institute of Field and Vegetable Crops, Novi Sad, Serbia. Irrigation was based on the water balance method. Daily evapotranspiration (ETd) was...
Article
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Oil flax is the oldest medicinal plant. Medicinal properties have: mature and dried linseed (Lini seed), flax mucilage (Mucilage Seminis Line), linseed oil (Oleum Lini) and flour (Lini farina). The seed is smooth, shiny, flattened, brown color and oval in shape. Linseed oil is most useful natural oil which is obtained by cold pressing the seeds. Th...
Article
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Facelija (Phacelia tanacetifolia Benth) je jednogodišnja krmna biljka, pripada porodici Hydrophyllaceae. Zbog dugog cvetanja gaji se kao ukrasna ili medonosna biljka. Facelija je odlična pčelinja paša. Sa jednog hektara facelije prinos meda varira od 500 do 1000 kg zavisno od uslova gajenja. U Institutu za ratarstvo i povrtarstvo 2015. godine prizn...
Chapter
Buckwheat (Fagopyrum esculentum Moench) is pseudo-cereal, honey and medicinal plant. Buckwheat is rich in carbohydrates, protein, contains all the B complex vitamins, especially niacin. Of the minerals rich in manganese, potassium, phosphorus, calcium, magnesium, sodium, iron, iodine, zinc, bromine, and contains nutritional fibers. Flavonoids rutin...
Article
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Alternative crops are known as plant species that occupy small and variable agricultural areas. The crops adapted to agro ecological conditions of Southeast Europe are with the developed technology of the production which means machinery commonly used for conventional crops with a moderate increase in manual labor. Therefore significant income can...
Article
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Tuber yield, together with tuber number and size are the basic agronomic and breeding traits in Jerusalem artichoke and can be significantly affected by environmental factors. We report the results of a long term trial on the performance of 20 Jerusalem artichoke cultivars. The random model for means with restricted maximum likelihood (REML) proced...
Article
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Comprehensive overview of the extent genetic diversity in South-East European landrace collection was estimated regard broadening of broomcorn (Sorghum bicolor [L]. Moench) germplasm variability. In a long-term field trials 28 accessions were analyzed to determine variability of agronomic (unthreshed panicle weight UTP, threshed panicle weight TRP,...
Article
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Facelija (Phacelia tanacetifolia Benth) je medonosna biljka. Gaji se za proizvodnju semena, za silažu, seno, kao usev za zelenišno đubrenje i kao zaštitni usev. Facelija ima i veliki agrotehnički značaj. Snažnim vretenastim korenom popravlja kvalitet zemljišta i kao nematocidna biljka korisna je za očuvanje higijene zemljišta. Takođe, facelija je i...
Article
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This study was aimed to assess the stability of direct yield components (bulb weight and number plot-1) and other yield contributing characteristics (bulb diameter, height and index, neck diameter and length, plant height, emergence and vegetation period) in five commercial onion cultivars grown in conventional and organic environments, by employin...
Conference Paper
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Hemp (Cannabis sativa L.) is considered one of the oldest crops known to man. It was used in the Old World for thousands of years as an important source of food, fiber, and medicine. Although primarily grown for hemp fiber used for production of durable plastics and specialty papers, fiber hemp plant has been attracting growing interest worldwide a...
Conference Paper
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In this paper the effect of different organic fertilizer on the morphological, productive and qualitative characteristics of the flower of pot marigold variety "Domestic orange" has been investigated. The trial was conducted during the period 2013 – 2015, at the experimental fields of the Institute for Medicinal Plant Research "Dr Josif Pančić", Pa...
Conference Paper
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Although Cucurbita moschata Duch, also known as tropical pumpkin, is being adapted to a wide range of climatic and soil conditions, it is a scientifically neglected species. Consumers appreciate its fruit due to its sweet and mild taste, as well as high nutritive value. Knowledge of genetic relationships among genotypes is essential for the effecti...
Article
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California bluebell (Phacelia tanacetifolia Benth) is an annual herbaceous plant belonging to the family Hydrophyllaceae (Boraginaceae according to the phylogenetic classification). Originally from North America. In Europe it is grown from the 19th century. The flowers are violet-blue color. Floral scents can be good attractants that attract bees....
Article
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Lan (Linum usitatissimum L.) je jednogodišnja zeljasta biljka, pripada familiji Linaceae. Lan je važan u biljnoj proizvodnji jer ima višestruku primenu: za proizvodnju ulja i vlakna. Lan za dobijanje ulja (niski-uljni lan) je dosta razgranat i daje dosta semena. Lan za dobijanje vlakna (dugački-tekstilni lan) ima slabo razgranatu stabljiku. Laneno...
Conference Paper
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The needs of the seed of soybean (Glycine max. (L.) Merr.) of water depending on weather conditions, varieties, cultural practices and others. The critical periods, of seed soybean with water to the periods: of flowering, formation and grain filling. The water shortage during this period combined with air drought negative affect fertility and signi...
Conference Paper
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Linseed is important in crop production. During the period 2012-2013 about average 2.31 million hectares of linseed was sown annually worldwide and showed rate of falling with certain oscillations. The highest areas of linseed of 94 % in the world was in Asian continent, Europe and on America (1.138 million ha, 521326 ha and 517890 ha), that is 49....
Article
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Study of the interaction between genotype (G) and year (Y) provides good estimates of genotypes breeding values. In order to investigate the main effects of G, Y and G x Y interactions on yield and quality components of NS soybean genotypes, an experiment with genotypes of different maturity groups was carried out during three-year period. The aver...
Article
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Buckwheat was sown annually worldwide of average 2.44 million hectares. In Serbia, buckwheat is cultivated in small areas, mostly in hilly-mountain areas of south-western of the country. Buckwheat breeding and technology development programme is situated at the Institute of Field and Vegetables Crops, Novi Sad, Department for alternative crops Bač...
Article
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In this paper were studied the morphological characteristics, productivity and tuber quality of the Jerusalem artichoke grown in different soil types. The study was conducted on soils of different texture and agrochemical properties: humoglay (the locality: Ivanovo 1), alluvium (the locality: Ivanovo 2) and chernozem on loess and partially gleyed s...
Article
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The paper describes the biological properties and agronomic efforts of herbicide weed management possibilities of important cocklebur species found in Slovakia. These include the common cocklebur Xanthium strumarium L. as well as hunter burr Xanthium riparium Itz. et Her. em. Lasch. both are widely spread species occurring mainly on arable land esp...
Conference Paper
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Izvod: Na oglednom polju Instituta za ratarstvo i povrtarstvo, Novi Sad, u Bačkom Petrovcu, praćena je i analizirana dinamika vlažnosti zemljišta termogravimetrijskom metodom u aktivnom sloju zemljišta za gajene biljne vrste u periodu 2012-2015. godine. Podaci su svrstani i prikazani po agrotehničkim merama, kako bi se utvrdio njihov uticaj na vlaž...