Tovstoshkur V. Perennial grass stands productivity at the different methods of their establishment and fertilization in the left-bank Forest-Steppe

Subject of inquiry - lea land, sown cereal and legume-grass perennial stand formation from cultivated and wild grasses. The aim - the establishment of regularities of different type perennial grass stand formation and optimization of its fertilizing at the mowing use. The research methods are field, laboratory, visual, measuring-weight, computational, analitical, economic-mathematical.For the first time the methods of reestablishment of natural forage lands are scientifically grounded and the comparative evaluation of sown cereal and legume-grass stands and lea lands at the mowing use are given depending on fertilizing on sloping lands. The lowinput ecologically safe technology of the reestablishment of natural heavy-productive forage lands on sloping arable ones with steepness 3-4 of the left-bank Ukrainian Forest-Steppe is worked out. What allows to save 180-220 kg/ha mineral fertilizer nitrogen and secures the obtaining per hectare 5-8 t feed units, 1.0-1.2 t row protein of high nutritious feed with the 130-150 g digested protein content in one feed unit. The scientific developments in 2007-2010 are introduced at the Model Experimental farm "Stepne" of Poltava district of Poltava region over an area 540 ha. The field of application - the agricultural production.