Influence of selection on economically valuable characters of plant-microbial populations of red fescue

Abstract

Ecologization of agricultural production and at the same time increasing of its efficiency is possible through the use of bacterial preparations. In long-term field experiments of 2016-2019 valuable characters of plant-microbial populations of red fescue (Festuca rubra L) variety Severnaya 82 of lawn and pasture use were studied after re-inoculation of seeds, obtained from the parent populations, which were also developed after inoculation with rhizosphere microorganisms on the basis of preparations of Mobiline 880, Azorizin 8, Azorizin 6, Flavobacterin, Agrofil and Rizoagrin. In the sowing experiment of 2016, plants of the first year of growth from the population with Mobilin 880 significantly exceeded in height (82 cm) the control plants without seed inoculation (77 cm, LSD05 = 3.5). In the experiment of 2017, the plants of all created plant-microbial populations of the second year of growth exceeded in height (48-50 см) the control variant plants (45 cm, LSD05 = 2.3). According to the yield of green mass in the 2016 experiment, populations of red fescue with Mobilin 880 and Rhizoagrin were distinguished (by 1.1 t/ha with yield in the control of 0.80 t/ha, LSD05 =0.23). The prolongation of the effect of Flavobacteria in the experiment has not been observed. Plant-microbial populations with Azorizin 8 and Mobilin 808 proved to be promision according to the character of high seed yield: in the third generation, they had higher seed productivity (0.144 и 0.152 t/ha, respectively) compared to the control without inoculation (0.076 t/ha, LSD05 = 0.064). To create highly productive plant-microbial populations of red fescue seeds, it is necessary to search among highly productive parent populations inoculated with associative symbionts, followed by inoculation of daughter populations with the same bacterial preparations.