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    THE EFFECT OF DIFFERENT MICROBIAL FERTILIZER DOSES ON YIELD AND YIELD COMPONENTS IN CORIANDER (Coriandrum sativum L.)
    (Univ Life Sciences Lublin, 2021) Gul, Volkan; Ozturk, Erdogan
    Microbial fertilizers containing Bacillus subtilis and Bacillus megaterium isolates are one of the important or-ganic fertilizers, which strengthen the immune system of plants against harmful effects and promote the plant growth by fixing nitrogen from the atmosphere, to obtain better quality products. This study was conducted to determine the effects of different liquid microbial fertilizer doses (0, 500, 1000, 1500, 2000, and 2500 ml 100 L-1) on the yield and yield components of the coriander (Coriandrum sativum L.) grown in Bayburt in 2018 and 2019. The experiment was set up as three replicates in randomized complete block design. The results indicated that there was a considerable variation in the yield and yield components of coriander, and the yield significantly increased as the dose of microbial fertilizer was increased. The maximum essential oil content and seed yield were recorded for the plots grown under the F-1 and F-3 treatment. It was found that the maximum seed yield was obtained in the F-3 treatment (839.0 kg ha(-1)), and the seed yield decreased in the F-4 (754.1 kg ha(-1)) and F-5 (759.9 kg ha(-1)) treatments. Although the increase in the microbial fertilizer dose increases seed yield, using the fertilizer in optimum dose can be more profitable. Therefore, this study suggests that the fertilizer dose F-3 can improve the productivity of the coriander grown in the areas treated with microbial fertilizer.
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    Effect of Liquid and Solid Vermicompost Applications on Growth and Yield of Sunflower (Helianthus annuus L.)
    (Adem Yavuz Sonmez, 2021) Gul, Volkan; Coban, Furkan; Ozturk, Erdogan
    Vermicompost, which is not harmfull to the environment, and is increasing in agricultural production in terms of both gaining to the soil and benefiting the waste. This research was carried out in 2019 in Bayburt ecological conditions in order to determine the impacts of different doses of solid (250, 500 and 750 kg da(-1)) and liquid (0, 250, 500 and 750 ml da(-1)) vermicompost fertilizers on the flowering and maturation period (days), stem diameter (cm), table diameter (cm), plant height (cm), thousand weight (g) seed yield (kg da(-1)), seed internal rate (%) oil ratio (%) and oil yield (kg da(-1)) of sunflower (Helianthus annuus). In the experiment, it was determined that all parameters were statistically significant compared to p<0.01. The highest seed (218.7 kg da(-1)) and oil yield (75.9 kg da(-1)), which are the most important parameters in oil sunflower, were obtained in 750 kg da(-1) solid and 750 ml da(-1) Liquid vermicompost application (K3S3). As a result, the use of solid and liquid vermicompost application in oil sunflower together will be beneficial in obtaining the highest healthy, high quality seed and oil yield.
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    Performance of organic manures alone or combined with chemical fertilizers in increasing growth, yield, and nutritional quality of potatoes in the Eastern part of Turkiye
    (Taylor & Francis Inc, 2024) Kurt, Gunes; Ozturk, Erdogan; Sefaoglu, Firat; Gul, Volkan; Toktay, Zehra; Mosber, Goltay
    This study aimed to determine the effects of different types of fertilizers (organic and inorganic fertilizers) on plant growth, yield, and yield components of potatoes grown in the high-altitude plateau of eastern Turkiye in 2017 and 2019. In the experiment, single or combined doses of nitrogen (N; as ammonium sulfate) and phosphorus (P; as triple super phosphate) as inorganic fertilizers and leonardite (L) and vermicompost (V) fertilizers as organic fertilizers were used. In both years, different fertilizer treatments significantly affected plant growth, yield, and yield components. Tuber yield per hill (941.0 g), marketable tuber yield (32.71 t ha(-1)), total tuber yield (37.84 t ha(-1)), specific gravity (1. 077 g cm(-3)), chip productivity (35.9%), starch (13.03%) and protein (11.0%) ratios increased when N fertilizer was used in combination with vermicompost or leonardite. N fertilizer combined with V or L fertilizer increased tuber yield under harsh continental climates, short growth periods, and high altitudes.