Abstract:
Experiments were carried out on the growing platform and in the production conditions to
investigate the effectiveness of plant growth promoting bacteria (PGPB) Azotobacter
chroococcum+Pseudomonas fluorescens, Bacillus subtilis and complex of trace elements
Microcom-V, specially developed earlier for the grape, in the cultivation of grape seedlings.
The schemes of the experiments included treatments with the introduction of bacterial
suspensions into the soil when planting grafted or non-grafted cuttings, and foliar fertilization of
plants with bacterial suspension and a Microcom-V at the 50 % of the recommended dose. It was
established that the joint application of the bacterial products (suspension and metabolites)
together with trace elements increase the availability of nutrients for plants, enhance the
development of small feeding roots, the photosynthetic activity of leaves, the growth and
development of seedlings, and improves the quality of planting material. The use of PGPB in
plant nutrition makes it possible to halve the total amount of trace elements in the Microcom-V
complex, which reduces the risk of possible environmental contamination when using chemical
fertilizers, and the cost of seedlings production |
