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).

Mazur Olena Vasylivna – Candidate of Agricultural Sciences, Senior Lecturer of the Department of  botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3).

Lotka Halina Ivanivna - Candidate of Agricultural sciences, Associate Professor of the Department of Veterinary Medicine, Hygiene and Animal Breeding Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str., 3 е-mail:  lyotkagalina@gmail.com).

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). 

According to the results of our research on the formation of the number of stems, plant height and the number of tubers under the bush, the influence of the fraction of planting tubers, fertilizers and varietal characteristics was revealed. During the application of 40 t / ha of semi-roasted manure, Kalimagnesia (K56Mg16S30) and simple phosphate (P30) under the main tillage, the biometric indicators of the Laperla variety increased, in particular from 3.3 to 3,9 the height of plants from 57.2 to 61.6 cm, and the number of tubers under the bush from 6.9 to 7.3 pcs. The biometric indicators were higher in the variant of the experiment, where against the background of application under the predecessor 40 t / ha of semi-roasted manure, Kalimagnesia (K56Mg16S30) and simple superphosphate (P30) under the main treatment was carried out during planting in the locally of Nitroammophoska (N30P30K30). Thus, the number of stems varied from 3,5 to 4 pieces, the height of plants from 64.8 to 66.8 cm, and the number of tubers under the bush increased from 7.1 to 7.6 pieces. The best variant of the experiment was obtained in the variety Granada, where on the basis of phosphorus-potassium fertilizer and the action of semi-roasted manure was carried out during planting in the rows of Nitroammophoska (N45P45K45). The number of stems varied from 4.2 to 4.8 pieces, plant height from 56.8 to 60.9 cm, and the number of stems under the bush from 9,0 to 9.5 pieces. This version of the experiment provided higher rates of quantitative characteristics, regardless of varietal characteristics and maturity group of potatoes. That is, atendency to a similar dependence is also established for medium-ripening Laperla variety and medium-ripening variety Memphis. Further study of the influence of the studied factors on the weight of tubers from one bush, yield structure of planting tubers and yield.

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