Faculty of Agricultural Sciences and Food

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Author: search.filters.author.Svjetlana Zeljković

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    EFFECT OF WATER EXTRACT OF ALOE VERA ON GERMINATION AND EARLY GROWTH OF DIANTHUS BARBATUS
    (Ss Cyril and Methodius University in Skopje, Faculty of Agricultural Sciences and Food - Skopje, 2022)
    Svjetlana Zeljković
    ;
    Lidija Milojević
    ;
    Emina Mladenović
    ;
    Margarita Davitkovska
    ;
    Zvezda Bogevska
    The Sweet William - Dianthus barbatus (L.) is a plant from Caryophyllaceae family. The germination and growth of the plant are important phenological stages, and plant survival depends on them. The seed that has better germination energy also has better vigor, so it is more resistant to stressful conditions during germination. The aim of this study was to examine the possibilities and effectiveness of water extracts of plant species Aloe vera on the seed germination and early growth of Sweet William seedlings - Dianthus barbatus (L.). The experiment was conducted in laboratory conditions at the Faculty of Agriculture, University of Banja Luka and consisted of control (distilled water) and treatment with water extract of Aloe vera. Water extracts were prepared from fresh leaves and experiments were conducted in Petri dishes at 5, 10, and 15%. The temperature in the laboratory was constant at 20°C and the light regime was set to 16h day/8h night. Water extracts of Aloe vera at a concentration of 5% had a positive effect on the seed germination and germination energy, while a concentration of 15% had a positive effect on shoot and root length, and fresh mass of Dianthus barbatus seedlings.
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    Influence of Microbiological Preparation Bacillomix on the Germination of Challistephus chinensis L.
    (University of Banja Luka Faculty of Agriculture University City Bulevar vojvode Petra Bojovića 1A 78000 Banja Luka, Republic of Srpska, B&H, 2023)
    Svjetlana Zeljković
    ;
    Marina Pekez
    ;
    Jelena Davidović Gidas
    ;
    Margarita Davitkovska
    ;
    Emina Mladenović
    The use of biostimulant create better conditions for the growth and development of the germ and germination. Bacillomix is 100% natural biostimulant and soil improver with increased content of live bacterial cells obtained from 12 powerful Bacillus sp. strains. The use of this preparation has many positive effects: stimulate of germination, rooting and growth of plants; improve the microbiological structure of the soil; keep the plants healthy through the growing season; increases the plants resistant to stress; supplies the plant with nitrogen, phosphorus, potassium and sulfur. The aim of this study was to examine the impact of microbiological preparation Bacillomix on the germination and germination energy of the seeds Challistephus chinensis L. In the experiment were totally 480 seeds of this species. The experiment was set up in the laboratory on Faculty of Agriculture, University of Banja Luka and consisted of control (K) and treatment with microbiological preparation Bacillomix in two concentrations (T1 100% and T2 10%). After 7 days germination energy and after 14 days germination of the seeds were tested. The highest average values of the germination energy were recorded in the treatment plants (73.75% T1, 64.38% T2), while the lowest values were recorded in control plants (60%). The highest average germination values were also recorded in treatment (78.755% T1, 73.75% T2), and the lowest in the control group (70%). The highest average values of hypocotyl height, root length and fresh weight were recorded also in the treatment plants (1.47 cm T1 and 1.01 cm T2; 4.59 cm T1 and 3.28 cm T2; 0.91 g T1 and 0.65 g T2) while the lowest values were recorded in control plants (0.99 cm; 2.87 cm; 0.61 g). It can be concluded that the use of a natural biostimulant is recommended for better germination and better morphological development of plants.
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    THE EFFECT OF DIVERSE FERTILIZERS ON THE QUALITY OF BEGONIA SEMPERFLORENS LINK. ET OTTO.
    (2022)
    Margarita Davitkovska
    ;
    Zvezda Bogevska
    ;
    Gordana Popsimonova
    ;
    Rukie Agic
    ;
    Ana Vujošević
    This research was carried out to analyze the effect of diverse types of fertilizers and concentrations on the morphological features of Begonia semperflorens Link. et Otto., as well as to determine the most appropriate concentration of fertilizer to obtain the highest plant quality. Different types of liquid fertilizers and concentrations were used in this experiment - Agrosal with NPK 10-5-5 + microelements (0.2%; 0.3%; 0.4%), Agrosal with NPK 7-1-5 + microelements (0.2%; 0.3%; 0.4%) and Agrosal with NPK 12-5-7 + microelements (0.2%; 0.3%; 0.4%). For measurement, 30 plants were used per treatment, three months after planting into plastic containers. The following biometric parameters were analyzed: plant height (mm), number of leaves, number of branches, and number of inflorescences. Measurements of biometric parameters showed that the liquid mineral fertilizer Agrosal with NPK 12-5-7 + microelements and a concentration of 0.4% showed the highest average number of branches and number of inflorescences. Agrosal with NPK 12-5-7 + microelements and concentration of 0.3% showed the highest average height of plant and Agrosal with NPK 7-1-5 + microelements and concentration of 0.2% showed the highest average number of leaves. Agrosal with NPK 12-5-7 + microelements and a concentration of 0.4% can be recommended in practice.
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    Seed germination of Calendula officinalis L. under influence of different light conditions
    (2022)
    Svjetlana Zeljković
    ;
    Ivana Kozomara
    ;
    Jelena Davidović Gidas
    ;
    ;
    Zvezda Bogevska
    The aim of this study was to examine germination rate and morphological characteristics of English marigold seedlings under influence of different light conditions. Seeds of Calendula officinalis L. were collected from the natural population of the Botanical garden of the University of Banja Luka. Experiment was set up in four replicates for each light treatment. Petri dishes with seeds were placed in growth chamber under artificial white (FLUO) and blue, red, and combination of blue/red (LED) light with 16h/8h photoperiod. Germination energy was tested after 7 days and germination of the seeds was tested after 14 days. Results showed significant difference in germination energy, germination rate, hypocotyl height, root length, and fresh weight. The highest average values of the germination energy and germination rate of the Calendula officinalis L. were recorded under red LED light (32%; 47%) while the lowest values were recorded under blue LED light (1%; 23%). The highest average values of hypocotyl height, root length and fresh weight were recorded also under red LED light (3,70 cm; 6,33 cm; 0,97 g) while the lowest values were recorded under combination of blue/red LED light (1,95 cm; 2,52 cm; 0,28 g). It can be concluded that the use of red LED light is recommended in the seed germination phase, not only for better germination but also for better morphological development.
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    QUALITY EXAMINATION OF PRIMULA ACAULIS HILL. TREATED WITH TWO DIFFERENT FERTILIZERS
    (2021)
    Margarita Davitkovska
    ;
    Romina Kabranova
    ;
    Zvezda Bogevska
    ;
    Gordana Popsimonova
    ;
    Rukie Agic
    This research was carried out to analyse the effect of two types of fertilisers on the morphological features of Primula acaulis Hill., as well as to decide on the most appropriate concentration of fertiliser in order to obtain the highest plants quality. Two different types of liquid fertilisers were used in this experiment - Magnicvet and Magnihortal with six treatments. Each treatment comprised 30 plants or a total of 180 plants in the experiment were used. 30 plants per treatment were measured randomly, four months after planting into pots. The following biometric parameters were analysed: plant height (mm), number of leaves, number of flower buds and number of flowers. Measurements of biometric parameters showed that the liquid mineral fertiliser Magnicvet with NPK 7-1-5 + micro elements is more appropriate as compared with the liquid mineral fertiliser Magnihortal with NPK 10-5-5 + micro elements concerning the reinforced nutrition and eventually the enhanced quality of Primula acaulis Hill.. Treatment with Magnicvet 0,4% showed the highest average number of leaves and average number of flower buds, while the treatment with Magnicvet 0,2% showed the highest average plant height and the treatment with Magnicvet 0,3% showed the highest average number of flowers.