Variety and microbial nitrogen-fixing preparations in the yield formation of variegated alfalfa

As a result of studies of two variegated alfalfa fodder varieties selected by the FWRC FPA (Previously All-Russian Williams Fodder Research Institute) and the local population variegated alfalfa variety, it was found that Vega 87 formed a lower yield of green mass in the first year of growth. The yield of the Pastbischnaya 88 variety of the local population was 16 % higher; the superiority of both varieties over the variety Vega 87 was by 50 and 60% in the second year, and 13-15% in the third year of growth. Variegated alfalfa provided the following green mass harvest over the three years: Vega 87 - 31.55 t/ha (the lowest harvest), Pastbischnaya 88 - 39.55 t/ha, local population variegated alfalfa - 40.8 t/ha. The positive effect of inoculation with virulent active strains of the nodule bacteria on the total (per five cuttings) harvest of green mass was expressed in its increase in the experimental variants by 5.04-10.17 t/ha (6.8-13.7%) compared to the control variant. With the aim of adaptive intensification of fodder production, the creation of stable agrophytocenoses with variegated alfalfa with inoculation of seeds with virulent active strains of nodule bacteria is shown (the main production strain 425a showed best results).