The system of formation of high-quality fodder agrocenosis based on full use of all factors of in- tensification - species, varieties, systems of fertiliz- ers and meteorological conditions developed at the regional level, to assess the impact of climate change on stability and productivity of agrophyto- cenosis and also to predict the yield of perennial crops in any economy of the Nenets Autonomous district in future. The purpose of the research was the development of the system of formation of high-quality fodder agrocenosis in the conditions of the Nenets Autonomous Area of the Russian Federa-tion. The research problem was to reveal the main regularities of the influence of climatic conditions and mineral forage on the growth and development of seeded grass cultures. Methodical bases of real-ization of the system of formation of agrocenosis provide radical improvement by accelerated incin-eration of unproductive inundated meadows with the use of earlier developed technology including milling of sod, harrowing, packing of soils, introduc-tion of mineral fertilizers and crops of perennial grasses. As the result of conducted researches the model of formation of the crop of seeded grass mix- tures against biological features and soil conditions, the elements of systems of agriculture was made, the role of climatic and agrotechnical factors when forming a crop was established, the potential of productional process which were the main condi-tions of formation of highly productive fodder agro-cenosis on the example of considered grass mix-ture in the conditions of the Nenets Autonomous Area was determined. The received model can be used in practice for rational use of nutrition supplies for the purpose of increasing the efficiency of seed- ing. The use of the system allows improving floral composition of meadows and the productivity twice at annual application of mineral fertilizers and main- taining the productive longevity of natural herbages.