Influence of the bacillus genus bacteria on the growth and productivity of tomatoes of spok variety

Abstract

Many scientists have established the multifunctional effect of bacteria of the genus Bacillus on various plants. It is necessary to use natural growth regulators to obtain high yields of tomato. The paper presents the results of studies on the effect of a mixture of strains of the genus Bacillus bacteria on the growing processes and productivity of tomato. In 2019–2020 under the conditions of the Novosibirsk region, in small-plot experiments, it was found that a mixture of bacterial strains of the genus Bacillus (B. amyloliquefaciens VKPM B-10642, B. amyloliquefaciens VKPM B-10643, B. subtilis VKPM B-10641) has a growth-stimulating effect on a tomato Spok variety. Their use contributed to an increase in the vegetative mass of plants. The treated plants, in comparison with the control sowing, were taller: the length of the aboveground part increased 1.2–1.4 times on average over 2 years. When using a mixture of strains of the Bacillus genus, the number of brushes, flowers and tomatoes increased. A statistically significant difference in the number of flowers and fruit was obtained when accounting for the first and second ten days of July. The number of fruit increased significantly in the second decade of July by 1.7 times. It was found that the pre-sowing treatment of tomato seeds with a mixture of strains not only contributed to an increase in growth rates, but also positively influenced the formation of the yield. Under the influence of the microbiological complex, the average weight of fruit increased by 1.2–1.4 times. The yield increase on average over 2 years was 4.5 kg/ m ². In this regard, it is possible to recommend the use of a mixture of strains of bacteria of the genus Bacillus at a concentration of 1×10⁶CFU/ ml for pre-sowing treatment of seeds as a growth stimulator and increase the productivity of tomato Spok variety.