Сільське господарство та лісівництво

Mazur Oleksandr Vasyliovych – Candidate of Agricultural Sciences, Associate Professor of the Department of Plant Production, Selection and Bioenergetic Cultures, Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str., 3, е-mail: selection@vsau.vin.ua).

Myronova H.V. – graduate student of the Department of Plant Breeding, Breeding and Bioenergy Crops of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3). 

Stashevsky R.V. – Postgraduate student of the Department of Plant Breeding, Breeding and Bioenergy Crops of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3).

The article presents the results of studies of the influence of fertilizer, fraction of planting tubers and varietal characteristics on the duration of phenological phases of potato varieties of different ripeness features. In the Laperla variety, seedlings appeared for 29-30 days, depending on the weight of the tubers, in the Granada variety, for 33-34 days, and in the Memphis variety, for 35-36 days. That is, there is a general prolongation of the period of emergence of seedlings depending on the group of ripeness of potatoes. The budding phase used to occur in the Laperla variety - on 51 days, a little later in the Granada variety - on 53-54 days and even later in the Memphis variety - on 56-57 days. A similar trend was observed in the flowering phase, which occurred most rapidly in the maturing variety Laperla - 67 days, a little later in the variety Granada - 69-70 days and the longest in the variety Memphis - 74-75 days.

Due to the increase in topical fertilization with the dose of N45P45K45 intorows (locally) of 40 t / ha of semi-roasted manure under the predecessor - winter wheat and Kalimagnesia K56Mg16S30 under the main tillage of potatoes of phenological phases of growth and development. Thus, in the Laperla variety the seedlings appeared on days 31-32, in the Granada variety on the 35th and 36th days, and in the Memphis variety on the 37st and 38nd days. The onset of the budding phase in this variant of the experiment in the variety Laperla was observed for 52-53 days, in the variety Granada for 58-59 days, and in the variety Memphis for 61-62 days. The onset of the flowering phase in the Laperla variety was observed for 69-70 days, in the Granada variety for 74-75 days, and in the Memphis variety for 80 days.

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