The influence of the microbial preparation BakSib on winter barley and the state of southern chernozem

Abstract

In the article, the authors showed the effectiveness of bacterization of winter barley variety Basalt with a complex microbial preparation BakSib. The authors used a semi-dry method of seed treatment (10 l/t of working solution) and a single treatment of vegetative plants on the southern chernozem together with chemical pesticides and without them. After treatment with the drug was observed: 1) a decrease in the number of microscopic fungi in the soil up to 3 times in the tillering phase and by 21% in the full ripeness phase in comparison with the control; 2) an increase in the number of ammonifiers from 44 to 81.4%; 3) an increase in the number of bacteria that assimilate mineral nitrogen from 79 to 116%. The authors revealed the stimulating effect of BakSib on the height of barley plants in all growth phases by 7.9–13.3% compared to the control. The yield of barley increased to 9%, and the number of grains per ear increased by 9.6% compared to the control and by 6.4% when comparing the full technology of plant protection of the farm and additional bacterization with BakSib. The authors also determined the compatibility of BakSib with the insecticide Clothianidin Pro (clothianidin 350 g/l) and the fungicide Sphinx (tebuconazole 60 g/l) for seed dressing. During the study, the authors found that under the action of chemical protectants, the initial titer of the biological product (10¹⁰–10¹² cells) is reduced by 3-4 times. The maximum decrease noted for individual groups of Baksiba microorganisms is two orders of magnitude. The drug contributed to a prolonged increase in copiotrophic bacteria in the southern chernozem and replenishment of its nitrogen fund during the heading period, which is important for grain productivity due to increased mineralization of organic residues in the soil.