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
