Khalin S. Growing techniques of increasing haylands productivity on slope lands of Left-bank Forest-steppe.

The object of the research is the process of species composition formation of plant aggregations, their yield and fodder quality characteristics, change in soil fertility elements subject to effect of various techniques of hillside meadow improvement. The objective is to determine peculiar features of grass stand species composition formation and yield on hillsides subject to a complex of techniques and to improve grass stand maintenance to obtain 4 to 5 metric tons of high-quality hay per hectare on natural stands, 6 to 7 metric tons per hectare on artificial stands. Research methods are field, weight-measuring, chemical, mathematical-statistical and computational-comparative ones. For the first time, for natural forage grasslands of the meadow and steppe area on hillsides of the Left-Bank Forrest-Steppe, a effect of agroecological factors on alteration of species composition of the natural grass ecosystem autotrophic unit, on the ecosystems yield formation has been determined. The best perennial legume-grass mixtures for restoring high-yield grass stands on former hillside plough lands have been determined. Complex guidelines for production that allow obtaining 4 to 7 metric tons of high-quality hay per hectare on natural grass stands and 8 to 9 metric tons per hectare on sown grass stands, 2.5 to 4.0 and 4.5 to 5.5 metric tons of feed units per hectare, 0.6 to 0.9 and 1.1 to 1.3 metric tons of crude protein, respectively, have been developed. The author's scientific research results were implemented during 1986 to 2004 and 2009 to 2012 at Kutuzivka, Chuvyrine, Ukrainka-Slobidska experimental farms of the Institute of Animal Science of the Ukrainian Academy of Agricultural Sciences in the Kharkiv Region on a total area of 400 hectares. The field of application is agricultural production.