Terletcka M. Productivity of grass mixtures depending on their composition and fertilizer for many-cutting use at Western Forest-Steppe.

Object of investigations-process of formation of cereal-legume agrophytocenosises with different composition legume and cereal components depending on fertilizes and mowing dates. An aim of work consists sn selection of the better species of perennial legume grasses for formation of seeded grass stands on natural fonder lands with dark gray medium-loamy drained soils of Western Forest-Steppe, for different variants of fertilizer, mowing dates and elaboration of recommendation for creating of high-productive seeded cereal-legume grass stands of many-cutting use. The methods of investigations-field and laboratory with use of visual, measure-weightful, calculative, analytical, statistical, calculate-comparative. There are established a share of influence of grass mixtures depending on introduction to its of new and thinly widening legume perennial grasses, phosphoric, potash and nitrogen fertilizer, of growth stimulator, and also of mowing dates on formation of botanical composition, compactness of grass stands and structure of yield. The intensity of grasses regeneration in afterorop is defined. The role of cereal and legume components in formation productivity of meadow lands of mane-cutting use is elucidated. The economy-energetical expending dependencies are established and choice of competitive-suitable models of technologies creating and using of many-cutting grass stands in zone of Western Forest-Steppe are substantiated.The scientific elaborations of author are introduces in 2009-2010 years of SPEF "Obroshyno" Pustomyty district Lviv region on square 25 ha, and PP Agrofarm "Agrotreid" t. Horodok district Lviv region on square 30 ha. Branch of use-agricultural production.