Agriculture and forestry

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.

1.Zaxarchuk O. V. (2009). Sort yak innovacijna osnova rozvy`tku rosly`nny`cztva [Variety as an innovative basis for crop development]. Agroinkom − Agroincom. № 5-8.  17-22. 

2.Shelepov V. V. (2006) Sort i jogo znachennya v pidvy`shhenni vrozhajnosti. Sortovy`vchennya ta oxorona prav na sorty` rosly`n [Variety and its importance in increasing yields. Variety research and protection of plant variety rights]. K.: Alefa. 

3.Zaviryuxa P. D. (2015). Selekciya kartopli u L`vivs`komu NAU: rezul`taty` i perspekty`vy`. Innovacijny`j rozvy`tok APK: problemy` ta yix vy`rishennya:mater. mizhnar. nauk.-prakt. konf., pry`svyachenoyi pam'yati dekana  agronomichnogo fakul`tetu M. F. Ry`baka [Potato breeding in Lviv NAU: results and prospects. Innovative development of agro-industrial complex: problems and their solutions: mater. international scientific-practical conference dedicated to the memory of the Dean of the Faculty of Agronomy MF Rybak]. (m. Zhy`tomy`r, 19-20 ly`stopada 2015 r.). Zhy`tomy`r: Vy`d-vo «Zhy`tomy`rs`ky`j nacional`ny`j agroekologichny`j universy`tet», 45-50. 

4.Osy`pchuk A. A. (2001). Stanovlennya selekciyi kartopli v Ukrayini. Genety`ka i selekciya v Ukrayini na mezhi ty`syacholit` [Formation of potato breeding in Ukraine. Genetics and selection in Ukraine at the turn of the millennium] K., Vols. 3.  336-338. 

5.Rud` V. P., Muravjova O. V., Sy`dora V. V. (2015). Problemy` rozvy`tku ry`nku kartopli v Ukrayini [Problems of potato market development in Ukraine]. 

Ovochivny`cztvo i bashtanny`cztvo − Vegetable and melon growing. Issue 61. 193-199. 

6.Bugayeva I. P., Cherny`chenko O. O., Cherny`chenko I. I. (2007). Sorty` kartopli rizny`x grup sty`glosti, pry`datni dlya vy`roshhuvannya v umovax pivdnya dvovrozhajnoyu kul`turoyu [Potato varieties of different maturity groups, suitable for growing in the south by two-crop]. Tavrijs`ky`j naukovy`j visny`k − Taurian Scientific Bulletin. Xerson, Issue 50. 59-63. 

7.Bukasov S. M., Kameraz A. Ya. (1972). Selekcy`ya y` semenovodstvo kartofelya [Selection and seed production of potatoes]. L.  

8.White P. J. et al. (2009). Relationships between yield and mineral concentrations in potato tubers [Relationships between yield and mineral concentrations in potato tubers]. HortScience− HortScience. Vols. 44. 1.  6-11. 

9.Ostapchuk M.O., Polishhuk I.S., Mazur O.V., Maksimov A.M. (2015). Vy`kory`stannya biopreparativ – perspekty`vny`j napryamok vdoskonalennya agrotexnologij [The use of biological products is a promising area for improving agricultural technologies]. Zbirny`k naukovy`x pracz` VNAU. Sil`s`ke gospodarstvo ta lisivny`czvo − Collection of scientific works of VNAU. Agriculture and forestryVinny`cya. № 2.  5-17.

10.Metody`ka provedennya eksperty`zy` sortiv rosly`n kartopli ta grup ovochevy`x, bashtanny`x, pryano-smakovy`x na pry`datnist` do poshy`rennya v Ukrayini (PSP) [Methods of examination of potato plant varieties and groups of vegetables, melons, spices for suitability for distribution in Ukraine (PSP)] (2017). / Za red. Tkachy`k S. O. Vinny`cya: FOP Korzun D. Yu. 6–7.