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ISSN : 2456-8643

Title:
EFFECT OF JOINT APPLICATION OF TRACE ELEMENTS AND PLANT GROWTH PROMOTING BACTERIA IN THE CULTIVATION OF GRAPE SEEDLINGS

Authors:
Veliksar Sofia and Lemanova Natalia

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

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