BACTERIAL CONSORTIUM BASED ON RHIZOSPHERE BACTERIA OF SPRING BARLEY
DOI 10.12737/2073046220241217 УДК 631.46:632.
Keywords:
barley, root rot, phytotoxicity, consortium of microorganisms, plant protectioAbstract
The studies were conducted to determine the protective effect demonstrated by a consortium of bacteria, isolated from barley rhizosphere, against root rot. The work was carried out on a model system in the laboratory and on barley plants in the field. Under laboratory conditions, the consortium was tested for the absence of phytotoxicity towards spring barley plants and for the ability to inhibit the development of root rot on a tomato-Fusarium oxysporum model system, where 31% decrease in disease development was demonstrated, compared to the control. Field experiments were conducted in 2023-2024 in the Republic of Tatarstan. The soil is gray forest heavy loam. For field experiments of the consortium, Kamashevskiy barley seeds were treated with a fungal spore suspension at a concentration of 104 CFU/ml at a rate of 4 l/t on the day of sowing. Root rot was observed both in the control and in the experimental variant: the development of disease in 2023 reached 17.1% and 9%, respectively, in 2024 12.6% and 7%. Despite the effect on root rot, the differences between the values of biometric indicators were statistically insignificant. The productivity in 2023 in the control variant was 41.5 c/ha, in the experimental it was significantly higher by 7.9 c/ha (HSR005 6.3 c/ha). In 2024 there were no significant differences between experimental and control variants, the yield was 43.0...44.5 c/ha with a lower value of this indicator in the control. Thus, the consortium of bacteria from the rhizosphere of spring barley is able to restrain the development of root rot without having a toxic effect on plants.
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