The establishment of sown pastures on fallow lands, flood plain terraces of the Lena river in Central Yakutia

In the conditions of market economy the mead-ow fodder production has very limited economic resources. Therefore there is a problem of finding energy-saving technologies to form and effectively use cultivated pastures. The concentration of live-stock farms near populated communities and the creation of specialized complexes force the process of trampling natural pastures. To determine the ef-fectiveness of the research we have carried out an accelerated admission phytocenotic reconstruction of natural grasslands on the basis of previously de-veloped mixtures. The studies were conducted at the Research and Production Station "Ilgelekh" of the Yakut Research Institute of Agriculture named after M.G. Safronov in Khangalassky region of the Republic of Sakha (Yakutia). The working process was held considering the scientific foundations of adaptive-landscape agriculture of Prilensky land-scape. The following seeds of released varieties were sown to create herbage: yellow alfalfa (Medicago Falcata) - variety Yakut, psathyrostachys juncea (Psathyrostachys juncea) - variety Manchahry, brome (Bromopsis inermis) - variety Haptaguyskiy, elymus Siberian (Elymus sibiricus) -variety Nyurbinsky. Natural pastures which are rich in forb-grass vegetation were used as a check of the research object. Researches were carried out according to the methods of Rus-sian Research Institute of Forages. During the ex-ploration we have found out that following types of herbs are the most promising for natural herbage grassing: psathyrostachys juncea - variety Manchahry, brome grade Haptaguysky, elymus Si-berian - variety Nyurbinsky and yellow alfalfa - va-riety Yakut. The research of techniques of acceler-ated development and use of seeded swards based on mixtures of different composition (cereal and legume-grass mixtures) has increased the productivity for three years from 1.3 to 3.0 t per 1 hectare of dry mass in average. The cheapest forage (cost of 1 feed unit is 2.1 rubles) with the highest margins of 177 % obtained by two-component grass-legume herbage.