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    The Response of Grain Legumes to Vermicompost at Germination and Seedling Stages
    (Agricultural Research Communication Centre, 2021) Ceritoglu, M.; Erman, M.; Ceritoglu, F.; Bektas, H.
    Background: The importance of organic fertilizers in agricultural production has increased due to the negative effects of intensive chemical fertilizer use on soil, the environment and human health. Vermicompost, as a rich organic fertilizer and soil amendment material, maybe a viable alternative to chemical fertilizers. While a low concentration of vermicompost has a promotive effect on growth, it may lead to inhibition of germination and seedling growth. Therefore, this study aimed to find appropriate dose ranges for vermicompost application. Methods: The study was carried out as a factorial experiment with a completely randomized design with three replications. The experiment was conducted in a growth chamber as a pot study with four doses of vermicompost (control, 10, 20 and 30%). Eight cultivars from four different species were used. The response of germination and seedling traits to increased vermicompost concentration was investigated. Result: In general, while 10% and 20% of vermicompost showed a promotive effect depending on species, higher dose inhibited the germination and dry matter accumulation. As a result, the promotive effect of low dose and inhibitory effect of higher doses are thought to be caused by the complex chemical composition of vermicompost and increasing medium pH. Therefore, the concentration of the vermicompost that will cause pH changes should be carefully considered and the pH range in which the plant species show optimum growth should be well determined.
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    Vermicompost Enhances the Effectiveness of Arbuscular Mycorrhizal Fungi, Cowpea Development and Nutrient Uptake
    (Agricultural Research Communication Centre, 2022) Atakli, S. Bice; Sahin, S.; Ceritoglu, M.; Cagatay, H. F.
    Background: Optimum plant nutrition with various organic and inorganic fertilizers such as synthetic fertilizer, compost, mycorrhiza and bacterial isolations have a pivotal role in agricultural production. This study was laid out to observe the combined impact of mycorrhiza and vermicompost treatments on plant growth and nutrient uptake of cowpea. Methods: The experiment was laid out under controlled greenhouse conditions at Tokat Gaziosmanpasa University in 2021. Arbuscular mycorrhizal fungi and vermicompost treatments were used in the experiment. The experiment was laid out in split-plot randomized complete design with three replications. Result: Individual performance of vermicompost amendment was more effective on nutrient uptake and seedling growth compared with alone mycorrhizal treatment and control. However, the combined application of mycorrhiza and vermicompost exhibited a remarkable synergistic impact on each other. In particular, combined application of vermicompost and mycorrhizal fungi induced leaf phosphorus content up to 72% over control seedlings. In conclusion, vermicompost both increased effectiveness of mycorrhizal fungi and also promoted nutrient uptake, dry matter accumulation and seedling growth in cowpea.