THE INFLUENCE OF PROTECTIVE AND STIMULATING SUBSTANCES ON THE PRODUCTIVITY OF POTATO VARIETIES IN THE CONDITIONS OF THE FOREST STEPPE OF THE RIGHT BANK
Polishchuk Mihaylo Ivanovych – сandidate of Agricultural Sciences, Associate Professor, the chief of Agriculture, Soil Science and Agrochemistry chair of Vinnytsia National Agrarian University (21008, Vinnytsya, 3, Soniachna Str., e-mail: email@example.com).
Oleksandr Boyko − student of the 31-A group of the Faculty of Agronomy and Forestry of Vinnytsia National Agrarian University (21008, Vinnytsya, 3, Soniachna Str.).
Alina Yakovets − student of the 45-A group of the Faculty of Agronomy and Forestry of Vinnytsia National Agrarian University (21008, Vinnytsia, Sonyachna Street).
The article presents the results of research on the study of the features of growth, development and formation of productivity elements of Obryi and Vodogray potato varieties depending on the influence of mineral fertilizers, protective agents and biological preparations under foliar fertilization. It is best to use Prestige as a potato tuber herbicide, since the colonization of plants by the Colorado potato beetle was noted 43-51 days after germination, somewhat worse indicators were observed in Matador varieties, colonization was noted 39-49 days and Masterpiece 37-47 days after emergence. In terms of varieties, the mid –early variety Obryi has the least resistance to colonization by the Colorado beetle, and accordingly, the highest resistance is noted in the mid-early variety Vodogray. The level of productivity of medium-early varieties of potatoes studied in the experiment of Obry and Vodogray increases with the use of impregnation agents for the treatment of seed material, on average by 6.4 - 9.3 t/ha, as well as the level of marketability of tubers on average from 8.3 to 10, 2% compared to control options. Such characteristics as the height of plants, the number of stems per bush, the number of stems per hectare and the area of the leaf surface in the conditions of 2020-2021 increase under the influence of the use of biostimulants. That is, the lowest values of the listed indicators were noted on the control variant (var. 1), and the highest values were respectively noted on variant 5, where Emistym C was applied (treatment of tubers + application in the phase of closing rows). Levels of yield and marketability of tubers in the years of research were high, while conditions in 2021 were more favorable compared to 2020.It should also be noted that the lowest values of yield and marketability of tubers were noted on the control version 1, and the use of biostimulants led to an increase in the above indicators. The highest values of the yield and marketability of tubers in the years of research were noted in experiment version 4, where Fon + Plantafol was applied (treatment of tubers + in closing rows) and in experiment 5, where Fon + Emistim C was applied (treatment of tubers + in closing rows).
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Scientific journal "AGRICULTURE AND FORESTRY" was founded in 1995; it was entitled as Bulletin of Vinnytsya State Agricultural Institute.
In 2010-2014 was enritled as Collection of scientific works of Vinnytsia National Agrarian University.
It has been named as Agriculture and Forestry since 2015.
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According to the order of the Ministry of Education and Science of Ukraine from 17.03.2020 № 409. Journal of Agriculture and Forestry is included in the List of scientific professional publications of Ukraine Category "B" in agricultural sciences (specialties) - 101, 201, 202, 203, 205, 206.