The estimation of productivity and nutrition of mixed soy seeds with annual cereal crops in the conditions of Primorsk region

The results of two-year studies of the use of soy in mixed crops of forage crops recommended for cultivation in the conditions of the Primorsk Region were presented. The studies were conducted in 2017-2018 in the fields of FSBEI "Primorsk State Agricultural Academy". The soil of the site was meadow-brown podzolized, heavy in mechanical composition. Meteorological conditions to varying degrees corresponded to biological needs of soy. High moisture content during the period of germination, budding, flowering and tying of beans positively affected the development of plants. The purpose of the research was to carry out a comparative assessment of the productivity and nutritional value of mixed soybean crops with annual cereals that provide stable increase in yield and feed quality. The experiment included the Primorskaya 86 soybean variety, annual cereals: paiza, sudana grass, maize, sorghum. The crops were evaluated basing on phenological observation, chemical composition, plant growth dynamics, yield, productivity and nutriousness of green and dry mass. The minimum vegetation period was marked for Primorskaya 86 soy variant. According to the height of plants, the seeding of soy Primorskaya 86+corn was distinguished, it exceeded the standard of soy Primorskaya 86 in flowering phase by 9.1 cm, and in the bean formation phase by 7.77 cm, respectively. In terms of productivity and nutrition, Primorskaya 86+payza soybean crop was distinguished. In the conditions of the monsoon climate of Primorsk Region, from the studied options for the rest of the indicators, mixed crops of the soy Primorskaya 86 with payza and soy Primorskaya 86 with corn were distinguished, which exceeded the control.