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The impact of the combined use of organic fertilizers and biological products on potato productivity in the southern Polissia region of Ukraine
Yamkovyi V., Podberezko I., Tomach A. The results of three-year studies (2021–2023) conducted at the Institute of Potato of the National Academy of Agrarian Sciences of Ukraine on the impact of the complex application of organic fertilizers and various biological preparations on the growth, development, and yield formation of potato plants are highlighted. It has been established that over three years of research, such indicators as plant height, number of stems per plant, stem density per hectare, and leaf area in 2021-2023 increased with the combined use of organic fertilizers and biological products. The lowest values of these indicators were observed in the control variant, and the highest, respectively, in variants 5, 6, and 7, where, on the background of green manure, additional 40 t/ha of manure were applied, and potato crops were treated with fungicidal biological products in combination with microbiological product «Rice Pi». Yield levels during the research years were high, in particular in 2022 were more favorable compared to 2021 and 2023. It should also be noted that the lowest tuber yields were observed in the control variant, and the highest (36,8 and 36,7 t/ha) in variants 6 and 7, where manure was applied against the background of green manure and a combination of biological preparations («MikoHelp» + «Rice Pi») and («Bactofit» + «Rice Pi») was used during the growing season. The research established a correlation between potato yield and individual biometric indicators. Based on specific mathematical models, correlation graphs were constructed, which allow predicting crop yield based on changes in biometric indicators. It has been established that the most significant biometric indicators for potato productivity are the number of stems per plant and stem density. These indicators account for 90–92 % of the yield.
Key words: potatoes, tubers, variety, biological preparations, yield, plant height, leaf area, correlation and regression analysis.
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