The paper presents the results of studying the influence of the species of perennial legumes and cereals on the productivity and nutritional value of pasture agrophytocenoses of the European North of the Russian Federation. The field experiment was started in 2017 and is still continuing. In the course of the research, it has been found that the most nutritious and highly productive, in comparison with the control variant, are the mixtures of legumes and cereals with the inclusion of festulolium or perennial ryegrass. The productivity of these grass mixtures is 8.7 t/ha and 8.4 t/ha, respectively, and significantly differs from the control variant.