EFFICIENCY OF THE POTATO INOCULATION WITH AZOTOBACTER AS EFFECTED BY POTATO LECTIN

The results of vegetative and field experiments which testify the positive in influence of consortium Azotobacter vinelandii and vinelandii and A. chroococcum M-70/2 strains on growth and productivity of potato plants are provided. As was shown the application of azotobacter, cultivated with the potato tubers’lectin into the culture medium increases the height of test-tube potato plants at their further growth in rolls by 12 %, number of mini-tubers - 86 % and their mass - 31 %. The productivity of potato plants in field experiments as effected by tubers preliminary inoculation with A. vinelandii and A. chroococcum M-70/2, cultivated with a lectin, before landing was increased by 19,2- 20,9 %, followed by the enhancement of production quality (starch contents in tubers was increased by 1,99 %, dry matters - 5,18 %).

THE EFFECT OF POTATO LECTIN ONTO DIAZOTROF GROWTH ACTIVITY

It are presented the results of the research of рotato lectin effect onto the growth activity of bacteria Azotobacter and Azospirillum genera. Dependence of growth of microorganisms on its content in the nutrient medium containing of it at the level of 0,2–20 mсg/ml was studied. It have been established the optimal рotato lectin concentration for Аzotobacter vinelandii and Аzotobacter chroococcum M-70/2 (1,0 mсg/ml) and Azospirillum brasilense 410 (1,5 mcg/ml), when the bacteria population density, specific growth rate are increased, biomass doubling time is decreased.