Biologicals’ use efficiency when cultivating pea-oat grass mix

The purpose of research is the study of microbial composition drugs on the productivity and nutritional value of pea-oat grass. The task of the work included an assessment of the action of biological preparations (pre-sowing and treatment on vegetation) on the yield of grass mixture and the qualitative characteristics of the feed obtained during the siloing of the green mass of pea and oats. The paper used preparations produced on the basis of living strains of Bacillus subtilis microorganisms ("Natourost"), Lactobacillus Buchneri ("Naturet-Active") and Bacillus Megaterium ("Natourost-M"). Small-shaped field studies were carried out in FGBU VolRC RAS (Vologda Region) in 2019–2020, the experiment on siloing was conducted in laboratory conditions. It has been shown that under the influence of biological products, the productivity of grass mixtures on dry biomass increases by 4.1–7.9 %. Evaluation of the nutritional value of the resulting silo showed that the treatment of biological preparations contributed to an increase in the content of feed units in a dry matter by 4.6–20.0 %, exchange energy – by 4.1–10.4 %, as a result, the gross yield of feed units increases by 12 , 7–28.8 %. The silage obtained from the mixed grass of experimental variants is characterized by lower pH and the content of oil acid, while the content of lactic acid, on the contrary, in-creases. The high productivity of biomass was obtained in experiments using the preparation "Natourost", in physical and chemical indicators and nutritional value, there is an improvement in the quality of the silage obtained from a mixture of pea and oats in an embodiment with the treatment with “Natourost-M” preparation.