Combined application of microbial preparation, mineral fertilizer and bioadhesive in production of leek

V. Karpenko¹*, G. Slobodyanyk¹, O. Ulianych¹, S. Schetyna¹, І. Mostoviak¹ and V. Voitsekhovskyi²

¹Uman National University of Horticulture, Faculty of Horticulture, Ecology and Plants Protection, Department of Biology, Department of Vegetable Growing, Department of Plant Protection and Quarantine, Instytutska street, 1, UA20300 Uman, Ukraine
²National University of Bioresources and Nature Management, Agrobiological Faculty Department of technologies of storage, processing and standardization of planting products by. prof. B.V. Lesika, Heroiv Oborony street 13, UA03041 Kyiv, Ukraine
*Correspondence: unuh1844@gmail.com

Abstract:

The research deals with additional fertilizing of leek cultivars Goliath and Tango with bacterial preparation Organic-balance and mineral fertilizer DripFert N₂₀P₂₀K₂₀ + Ме in combination with adhesive agent of a natural origin Liposam. Field research was performed on the experimental plots of the Department of Vegetable Growing of Uman National University of Horticulture. The research focused on microbiological processes and formation of productivity in the leek crops depending on the combination of preparations.
It has been established that the number of bacteria Azotobacter in the rhizosphere of leek increased 2.8 times after a four-time fertilizing with bacterial preparation Organic-balance and bioadhesive Liposam during vegetation. The maximum number of bacteria, including Azotobacter, in the rhizosphere of leek, was recorded after a four-time fertilization with DripFert N₂₀P₂₀K₂₀ + Ме in combination with Organic-balance and Liposam. The share of influence of additional fertilization on the microbiota of the rhizosphere made up 77–97%.
Leek cultivar Tango produced a larger assimilative leaf surface. Depending on the fertilizing the maximum leaf surface and photosynthetic potential of leek cultivars Tango and Goliath were recorded under combination of Organic-balance + DripFert N₂₀P₂₀K₂₀ + Ме + Liposam. The yielding capacity of variety Goliath was better than that one of the variety Tango regardless of fertilizing. To make the growing technology of leek more environmental friendly it is advisable to introduce in the growing technology bacterial preparation Organic-balance together with Liposam. Utilization of these preparations improves crop yield, which makes up 0.6–0.7 t ha^-1 for variety Goliath and 1.1–2.7 t ha^-1 for variety Tango correspondingly. The investigated leek varieties had the maximum yields under combined application of Organic-balance + Liposam with fertilizer DripFert N₂₀P₂₀K₂₀ + Ме, which is by 18–24% higher than provided by plants grown without fertilization.

Key words:

additional fertilization, assimilative leaf surface, bioadhesive, leek growing, microbial preparation, mineral fertilizer, photosynthetic potential, rhizosphere microbiota, yield

Formation of photosynthetic and grain yield of spring barley (Hordeum vulgare L.) depend on varietal characteristics and plant growth regulators

A. Panfilova*, M. Korkhova, V. Gamayunova, M. Fedorchuk, A. Drobitko, N. Nikonchuk and O. Kovalenko

Mykolayiv National Agrarian University, Faculty of Agricultural technologies, 73 Karpenko street, UA54021 Mykolayiv, Ukraine
*Correspondence: panfilovaantonina@ukr.net

Abstract:

The aim of the study was to determine the efficiency of the barley treatment crops with modern retrograde preparations on the background of the mineral fertilizers introduction into the photosynthetic activity of crops and grain yield. The experiments were carried out in 2013 -2017 on the southern black soil in the conditions of the Ukrainian Steppe. On the basis of the study results, it was determined that the introduction of irrigated fertilizer barley in a dose of N₃₀P₃₀ (background) under pre-sowing cultivation and the application of extra-root crop supplements at the phases beginning of the barley outflow straw into the tube and the organoleptic fermentation of Organic D2 and natural microbial complex Escort – Bio creates favorable conditions for the formation at the optimal levels of photosynthetic parameters and grain yield. Thus, on average, over the years of research and by factor variety, grain yield on these experimental variants was 3.37–3.41 t ha^-1, which exceeded its level on uncontrolled control by 0.71–0.75 t ha^-1 or 26.7–28.2%. Based on the study results, the use of modern regenerating agents against the background of mineral fertilizers can be recommended as an expedient and effective measure of spring barley raising the productivity.

Key words: